TACOMA, Wash., April 27, 2016 /PRNewswire/ -- Melanie Dressel, President and Chief Executive Officer of Columbia Banking System and Columbia Bank (NASDAQ: COLB) ("Columbia"), said today upon the release of Columbia's first quarter 2016 earnings, "Our reported earnings were muted by the last of the Intermountain acquisition expense, increased provision expense and lower accretion income. In the near term, the current rate environment is challenging for organic loan growth to fully offset the runoff in accretion income. Aside from our reported earnings, we had some very positive outcomes in the quarter. These include the highest first quarter loan production we have ever achieved, continued growth during what is historically our slowest quarter for deposit gathering, and meaningful expense control." Ms. Dressel continued, "Despite the uptick in provision expense for the quarter, we remain confident in the overall quality of our loan portfolio."

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Balance Sheet

Total assets at March 31, 2016 were $9.04 billion, an increase of $84.2 million from December 31, 2015 as deposit account net inflows were used to fund loan growth and purchase investment securities. Loan growth of $62.3 million during the quarter was driven by strong loan originations of $254 million. Loan production was diversified across the portfolio sectors but centered in our commercial business sector. Securities were $2.20 billion at March 31, 2016, an increase of $26.0 million, or 1% from $2.17 billion at December 31, 2015. Total deposits at March 31, 2016 were $7.60 billion, an increase of $158.1 million from $7.44 billion at December 31, 2015. Core deposits comprised 96% of total deposits and were $7.29 billion at March 31, 2016, an increase of $157.2 million from December 31, 2015. The average rate on interest-bearing deposits and total deposits for the quarter was 0.07% and 0.04%, respectively, remaining unchanged from the fourth quarter of 2015.

Income Statement

Net Interest Income

Net interest income for the first quarter of 2016 was $80.2 million, a decrease of $1.6 million and $194 thousand from the linked and prior year first quarter, respectively. The linked quarter decrease was the result of one less day of interest accruals in the current quarter and a decline in incremental accretion income on loans, partially offset by higher loan volumes. The decrease from the prior year period is attributed to lower incremental accretion income, which in the current quarter is $2.8 million less than the first quarter of 2015. For additional information regarding net interest income, see the "Average Balances and Rates" table.

Noninterest Income

Noninterest income was $20.6 million for the first quarter of 2016, a decrease of $4.1 million compared to $24.7 million for the fourth quarter of 2015. The linked quarter decrease was primarily due to the $3.1 million accrual adjustment recorded during the fourth quarter of 2015 through other noninterest income related to the mortgage repurchase liability resulting from our acquisition of West Coast Bank. Additionally, income from interest rate contracts associated with commercial loan products was $428 thousand lower than the linked quarter.

Compared to the first quarter of 2015, noninterest income declined by $2.1 million primarily due to the change in FDIC loss-sharing asset, which accounted for $1.3 million of the decrease. In addition, other noninterest income was lower in the current quarter due to a $402 thousand decrease related to gains on disposals of loans.

The change in the FDIC loss-sharing asset has been a significant component of noninterest income, but over time the significance has diminished. The following table reflects the income statement components of the change in the FDIC loss-sharing asset:



                                               Three Months Ended
                                               ------------------

                              March 31,             December 31,           March 31,

                                    2016                     2015                  2015
                                    ----                     ----                  ----

                                                 (in thousands)

    Adjustments reflected in
     income

    Amortization, net            (1,332)                          (1,098)                         (2,294)

    Loan impairment                  147                               855                            1,532

    Sale of other real estate        144                             (484)                           (420)

    Write-downs of other real
     estate                           18                                10                            1,071

    Other                           (80)                            (314)                             261
                                     ---                              ----                              ---

    Change in FDIC loss-
     sharing asset                       $(1,103)                                       $(1,031)            $150
                                          =======                                         =======             ====

Noninterest Expense

Total noninterest expense for the first quarter of 2016 was $65.1 million, a decrease of $1.8 million compared to $66.9 million for the fourth quarter of 2015. After removing the effect of the acquisition-related expenses, which were predominantly related to occupancy in the current quarter, noninterest expense for the current quarter was $2.4 million lower than the fourth quarter of 2015 on the same basis. The decrease was due in part to $852 thousand higher occupancy costs recorded in the prior quarter related to the write-down of land pending sale, which was sold during the current quarter. Also contributing to the decrease was lower expense related to the FDIC clawback liability of $209 thousand during the current quarter compared to $813 thousand in the prior quarter. The linked quarter reduction in legal and professional expense was principally driven by higher fees incurred in the fourth quarter of 2015 for regulatory exams and filings.

Compared to the first quarter of 2015, noninterest expense decreased $1.7 million, or 2%, from $66.7 million. This decrease was due to lower compensation and benefits and was partially offset by higher net OREO expenses. OREO expenses were a net cost of $104 thousand in the current quarter but were a net benefit of $1.2 million in the first quarter of 2015.

Net Interest Margin ("NIM")

Columbia's net interest margin (tax equivalent) for the first quarter of 2016 was 4.13%, a decline of 12 and 26 basis points from the linked and prior year quarters, respectively. The decline was due to both lower incremental accretion on acquired loans and lower yielding originated loans. Incremental accretion income was $4.7 million in the current period compared to $7.5 million in the prior year quarter. Columbia's operating net interest margin (tax equivalent)((1) )was 4.03% for the first quarter of 2016, a decrease of 6 basis points from 4.09% for the fourth quarter of 2015 and down 15 basis points compared to 4.18% for the first quarter of 2015 as a result of the continuing low interest rate environment.

The following table shows the impact to interest income resulting from income accretion on acquired loan portfolios as well as the net interest margin and operating net interest margin:



                                                          Three Months Ended
                                                          ------------------

                      March 31,        December 31,           September 30,           June 30,     March 31,

                           2016                 2015                     2015                 2015          2015
                           ----                 ----                     ----                 ----          ----

                                                        (dollars in thousands)

    Incremental
     accretion income
     due to:

    FDIC purchased
     credit impaired
     loans                      $1,657                                         $2,200                             $2,082             $2,367 $2,447

    Other FDIC
     acquired loans
     (2)                     -                          68                                   34                      15        117

    Other acquired
     loans                3,073                        3,746                                4,293                   4,889      4,934
                          -----                        -----                                -----                   -----      -----

    Incremental
     accretion income           $4,730                                         $6,014                             $6,409             $7,271 $7,498
                                ======                                         ======                             ======             ====== ======


    Net interest
     margin (tax
     equivalent)          4.13%                       4.25%                               4.37%                  4.41%     4.39%

    Operating net
     interest margin
     (tax equivalent)
     (1)                 4.03%                       4.09%                               4.18%                  4.17%     4.18%


    (1)              Operating net interest margin
                     (tax equivalent) is a non-GAAP
                     financial measure. See the
                     section titled "Non-GAAP
                     Financial Measures" on the last
                     pages of this earnings release
                     for the reconciliation of
                     operating net interest margin
                     (tax equivalent) to net
                     interest margin.


    (2)              For 2016, incremental accretion
                     income on other FDIC acquired
                     loans is no longer considered
                     significant.

Asset Quality

At March 31, 2016, nonperforming assets to total assets were 0.55% compared to 0.39% at December 31, 2015. Total nonperforming assets increased $14.1 million due to a $15.4 million increase in nonaccrual loans, partially offset by a decrease in other real estate owned.

The following table sets forth information regarding nonaccrual loans and total nonperforming assets:



                   March 31, 2016              December 31,
                                                   2015
                   --------------             -------------

                                  (in thousands)

    Nonaccrual
     loans:

    Commercial
     business                       $22,559                         $9,437

    Real estate:

    One-to-four
     family
     residential              730                              820

    Commercial and
     multifamily
     residential            8,117                            9,513
                            -----                            -----

    Total real
     estate                 8,847                           10,333

    Real estate
     construction:

    One-to-four
     family
     residential              768                              928
                              ---                              ---

    Total real
     estate
     construction             768                              928

    Consumer                4,717                              766
                            -----                              ---

    Total
     nonaccrual
     loans                 36,891                           21,464

    Other real
     estate owned
     and other
     personal
     property
     owned                 12,427                           13,738

    Total
     nonperforming
     assets                         $49,318                        $35,202
                                    =======                        =======

The following table provides an analysis of the Company's allowance for loan and lease losses:



                                                     Three Months Ended
                                                     ------------------

                              March 31, 2016           December 31,
                                                           2015                  March 31, 2015
                              --------------          -------------              --------------

                                                       (in thousands)

    Beginning balance                        $68,172                                            $69,049           $69,569

    Charge-offs:

    Commercial business              (3,773)                            (2,184)                         (1,426)

    One-to-four family
     residential real estate               -                               (79)                             (8)

    Commercial and
     multifamily residential
     real estate                           -                              (264)                               -

    Consumer                           (266)                              (545)                           (891)

    Purchased credit impaired        (2,866)                            (3,680)                         (4,100)
                                      ------                              ------                           ------

    Total charge-offs                (6,905)                            (6,752)                         (6,425)

    Recoveries:

    Commercial business                  662                                 886                              618

    One-to-four family
     residential real estate              41                                  19                               12

    Commercial and
     multifamily residential
     real estate                          69                                 277                            3,261

    One-to-four family
     residential real estate
     construction                        254                                  52                               28

    Commercial and
     multifamily residential
     real estate construction              1                                   1                                3

    Consumer                             165                                 224                              273

    Purchased credit impaired          1,551                               2,067                            1,686
                                       -----                               -----                            -----

    Total recoveries                   2,743                               3,526                            5,881
                                       -----                               -----                            -----

    Net charge-offs                  (4,162)                            (3,226)                           (544)

    Provision for loan and
     lease losses                      5,254                               2,349                            1,209
                                       -----                               -----                            -----

    Ending balance                           $69,264                                            $68,172           $70,234
                                             =======                                            =======           =======

The allowance for loan losses to period end loans was 1.18% at March 31, 2016 compared to 1.17% at December 31, 2015. For the first quarter of 2016, Columbia recorded a net provision for loan and lease losses of $5.3 million compared to a net provision of $1.2 million for the comparable quarter last year. The provision for loan and lease losses recorded during the current quarter was due to net charge-off activity, $3.5 million of which stemmed from two commercial business loans, and organic loan growth.

Andy McDonald, Columbia's Executive Vice President and Chief Credit Officer, stated, "Our provision for the first quarter was primarily driven by charge-offs which rose six basis points to 28 basis points on an annualized basis when compared to last quarter. While not a big jump quarter over quarter, it nevertheless did have an impact." Mr. McDonald continued, "We are still satisfied with how our loan portfolio is behaving. Nonperforming assets at 55 basis points and an impaired asset capital ratio of less than 16% continue to reflect strong performance."

Impact of FDIC Acquired Loan Accounting

While the significance of the FDIC acquired loan accounting has diminished over time, the following table illustrates the impact to earnings associated with Columbia's FDIC acquired loan portfolios:



                                  FDIC Acquired Loan Accounting

                                         Three Months Ended
                                         ------------------

                   March 31, 2016              December 31,
                                                   2015                 March 31, 2015
                   --------------             -------------             --------------

                                           (in thousands)

    Incremental
     accretion
     income on
     FDIC
     purchased
     credit
     impaired
     loans                           $1,657                                             $2,200          $2,447

    Incremental
     accretion
     income on
     other FDIC
     acquired
     loans (1)                  -                                    68                             117

    Provision for
     losses on
     FDIC
     purchased
     credit
     impaired
     loans                  (653)                               (1,349)                        (2,609)

    Change in FDIC
     loss-sharing
     asset                (1,103)                               (1,031)                            150

    FDIC clawback
     liability
     expense                (209)                                 (812)                           (23)

    Pre-tax
     earnings
     impact                          $(308)                                            $(924)            $82
                                      =====                                              =====             ===


                    For 2016, incremental
                     accretion income on other
                     FDIC acquired loans is no
                     longer considered
    (1)              significant.

The incremental accretion income on FDIC purchased credit impaired loans represents the amount of income recorded above the contractual rate stated in the individual loan notes. At March 31, 2016, the accretable yield on purchased credit impaired loans was $56.6 million. Accretable yield is subject to change based upon expected future loan cash flows, which are remeasured by Columbia on a quarterly basis.

The $1.1 million change in the FDIC loss-sharing asset in the current quarter reduced noninterest income and consisted primarily of $1.3 million in amortization expense. Additional details of the components of the change in the FDIC loss-sharing asset are provided in tabular format in the section titled "Noninterest Income" in the prior pages.

Organizational Update

Ms. Dressel commented, "We carefully evaluate opportunities to improve our noninterest expense, particularly in light of continued pressure from the prolonged low interest rate environment. Our goal, as always, is to improve operating leverage while not sacrificing our commitment to customer service. To that end, during 2015 we consolidated four branches and during the first quarter of 2016 we consolidated an additional branch as a part of this objective."

Ms. Dressel continued, "Since our founding, we have maintained a strong commitment to being actively engaged in the communities we have the privilege to serve. We were very pleased to be recently recognized by the Puget Sound Business Journal as one of Washington State's 75 Top Corporate Philanthropists for 2016."

Regular and Special Cash Dividends

A regular cash dividend of $0.19 per common share, and per common share equivalent for holders of preferred stock, will be paid on May 25, 2016 to shareholders of record as of the close of business on May 11, 2016. In addition, a special cash dividend of $0.18 per common share, and per common share equivalent for holders of preferred stock, which will also be paid on May 25, 2016 to shareholders of record as of the close of business on May 11, 2016.

Ms. Dressel commented, "We are pleased that our financial performance allows us to increase our regular dividend from the prior quarter by 6% to $0.19 per share, and to pay a special cash dividend for the ninth consecutive quarter. Along with our regular dividend, the special dividend constitutes a payout ratio of 100% for the quarter and a dividend yield of 4.67% based on our closing price on April 27, 2016."

Conference Call Information

Columbia's management will discuss the first quarter 2016 results on a conference call scheduled for Thursday, April 28, 2016 at 1:00 p.m. Pacific Daylight Time (4:00 p.m. Eastern Daylight Time). Interested parties may listen to this discussion by calling 1-866-378-3802; Conference ID code #22782081.

A conference call replay will be available from approximately 4:00 p.m. PDT on April 28, 2016 through 9:00 p.m. PDT on May 5, 2016. The conference call replay can be accessed by dialing 1-855-859-2056 and entering Conference ID code #22782081.

About Columbia

Headquartered in Tacoma, Washington, Columbia Banking System, Inc. is the holding company of Columbia Bank, a Washington state-chartered full-service commercial bank, with locations throughout Washington, Oregon and Idaho. For the ninth consecutive year, the bank was named in 2015 as one of Puget Sound Business Journal's "Washington's Best Workplaces." Columbia ranked in the top 20 on the 2016 Forbes list of best banks in the country for the fifth year in a row.

More information about Columbia can be found on its website at www.columbiabank.com.

Note Regarding Forward-Looking Statements

This news release includes forward looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward looking statements include, but are not limited to, descriptions of Columbia's management's expectations regarding future events and developments such as future operating results, growth in loans and deposits, continued success of Columbia's style of banking and the strength of the local economy. The words "will," "believe," "expect," "intend," "should," and "anticipate" or the negative of these words or words of similar construction are intended in part to help identify forward looking statements. Future events are difficult to predict, and the expectations described above are necessarily subject to risks and uncertainties, many of which are outside our control, that may cause actual results to differ materially and adversely. In addition to discussions about risks and uncertainties set forth from time to time in Columbia's filings with the Securities and Exchange Commission, available at the SEC's website at www.sec.gov and the Company's website at www.columbiabank.com, including the "Risk Factors," "Business" and "Management's Discussion and Analysis of Financial Condition and Results of Operations" sections of our annual reports on Form 10-K and quarterly reports on Form 10-Q, (as applicable), factors that may cause actual results to differ materially from those contemplated by such forward-looking statements include, among others, the following: (1) local, national and international economic conditions may be less favorable than expected or have a more direct and pronounced effect on Columbia than expected and adversely affect Columbia's ability to continue its internal growth at historical rates and maintain the quality of its earning assets; (2) changes in interest rates could significantly reduce net interest income and negatively affect funding sources; (3) projected business increases following strategic expansion or opening or acquiring new branches may be lower than expected; (4) costs or difficulties related to the integration of acquisitions may be greater than expected; (5) competitive pressure among financial institutions may increase significantly; and (6) legislation or regulatory requirements or changes may adversely affect the businesses in which Columbia is engaged. We believe the expectations reflected in our forward-looking statements are reasonable, based on information available to us on the date hereof. However, given the described uncertainties and risks, we cannot guarantee our future performance or results of operations and you should not place undue reliance on these forward-looking statements which speak only as of the date hereof. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by the federal securities laws. The factors noted above and the risks and uncertainties described in our SEC filings should be considered when reading any forward-looking statements in this release.



    Contacts:                    Melanie J. Dressel,

                                 President and

                                 Chief Executive Officer

                                 (253) 305-1911


                                 Clint E. Stein,

                                 Executive Vice President

                                  and Chief Financial
                                  Officer

                                 (253) 593-8304




    FINANCIAL STATISTICS

    Columbia Banking System, Inc.                                    Three Months Ended
                                                                     ------------------

    Unaudited                           March 31,                 December 31,                  March 31,

                                              2016                         2015                         2015
                                              ----                         ----                         ----

    Earnings                                       (dollars in thousands except per share amounts)
    --------

    Net interest income                                 $80,170                                                 $81,819                $80,364

    Provision for loan and lease losses                  $5,254                                                  $2,349                 $1,209

    Noninterest income                                  $20,646                                                 $24,745                $22,767

    Noninterest expense                                 $65,074                                                 $66,877                $66,734

    Acquisition-related expense
     (included in noninterest expense)                   $2,436                                                  $1,872                 $2,974

    Net income                                          $21,259                                                 $26,740                $24,361

    Per Common Share
    ----------------

    Earnings (basic)                                      $0.37                                                   $0.46                  $0.42

    Earnings (diluted)                                    $0.37                                                   $0.46                  $0.42

    Book value                                           $21.70                                                  $21.48                 $21.53

    Averages
    --------

    Total assets                                     $8,949,212                                              $8,905,743             $8,505,776

    Interest-earning assets                          $8,005,945                                              $7,937,308             $7,529,040

    Loans                                            $5,827,440                                              $5,762,048             $5,414,942

    Securities, including Federal Home
     Loan Bank stock                                 $2,147,457                                              $2,136,703             $2,068,806

    Deposits                                         $7,445,693                                              $7,440,628             $6,927,756

    Interest-bearing deposits                        $3,983,314                                              $3,933,001             $4,157,491

    Interest-bearing liabilities                     $4,124,582                                              $4,031,214             $4,395,502

    Noninterest-bearing deposits                     $3,462,379                                              $3,507,627             $2,770,265

    Shareholders' equity                             $1,258,411                                              $1,259,117             $1,240,853

    Financial Ratios
    ----------------

    Return on average assets                 0.95%                                      1.20%                             1.15%

    Return on average common equity          6.76%                                      8.50%                             7.86%

    Average equity to average assets        14.06%                                     14.14%                            14.59%

    Net interest margin (tax
     equivalent)                             4.13%                                      4.25%                             4.39%

    Efficiency ratio (tax equivalent)
     (1)                                   62.63%                                     60.99%                            62.95%

    Operating efficiency ratio (tax
     equivalent) (2)                        59.43%                                     60.53%                            63.02%


                                        March 31,                 December 31,

    Period end                                2016                         2015
    ----------                                ----                         ----

    Total assets                                     $9,035,932                                              $8,951,697

    Loans, net of unearned income                    $5,877,283                                              $5,815,027

    Allowance for loan and lease losses                 $69,264                                                 $68,172

    Securities, including Federal Home
     Loan Bank stock                                 $2,196,407                                              $2,170,416

    Deposits                                         $7,596,949                                              $7,438,829

    Core deposits                                    $7,285,067                                              $7,127,866

    Shareholders' equity                             $1,260,788                                              $1,242,128

    Nonperforming assets
    --------------------

    Nonaccrual loans                                    $36,891                                                 $21,464

    Other real estate owned ("OREO")
     and other personal property owned
     ("OPPO")                               12,427                                      13,738

       Total nonperforming assets                       $49,318                                                 $35,202
                                                        =======                                                 =======

    Nonperforming loans to period-end
     loans                                   0.63%                                      0.37%

    Nonperforming assets to period-end
     assets                                  0.55%                                      0.39%

    Allowance for loan and lease losses
     to period-end loans                     1.18%                                      1.17%

    Net loan charge-offs                                 $4,162                            (3)                   $3,226         (4)


    (1)              Noninterest expense divided by
                     the sum of net interest income
                     on a tax equivalent basis and
                     noninterest income on a tax
                     equivalent basis.


    (2)              The operating efficiency ratio
                     (tax equivalent) is a non-GAAP
                     financial measure. See section
                     titled "Non-GAAP Financial
                     Measures" on the last pages of
                     this earnings release for the
                     reconciliation of the operating
                     efficiency ratio (tax
                     equivalent) to the efficiency
                     ratio (tax equivalent).


    (3)              For the three months ended March
                     31, 2016.


    (4)              For the three months ended
                     December 31, 2015.


    QUARTERLY FINANCIAL STATISTICS

    Columbia Banking System, Inc.                                              Three Months Ended
                                                                               ------------------

    Unaudited                           March 31,            December 31,                    September 30,          June 30,                March 31,

                                             2016                       2015                         2015                  2015                   2015
                                             ----                       ----                         ----                  ----                   ----

                                                                 (dollars in thousands except per share)

    Earnings
    --------

    Net interest income                              $80,170                                       $81,819                         $81,694                           $81,010    $80,364

    Provision for loan and lease losses               $5,254                                        $2,349                          $2,831                            $2,202     $1,209

    Noninterest income                               $20,646                                       $24,745                         $22,499                           $21,462    $22,767

    Noninterest expense                              $65,074                                       $66,877                         $64,067                           $68,471    $66,734

    Acquisition-related expense
     (included in noninterest expense)                $2,436                                        $1,872                            $428                            $5,643     $2,974

    Net income                                       $21,259                                       $26,740                         $25,780                           $21,946    $24,361

    Per Common Share
    ----------------

    Earnings (basic)                                   $0.37                                         $0.46                           $0.45                             $0.38      $0.42

    Earnings (diluted)                                 $0.37                                         $0.46                           $0.45                             $0.38      $0.42

    Book value                                        $21.70                                        $21.48                          $21.69                            $21.38     $21.53

    Averages
    --------

    Total assets                                  $8,949,212                                    $8,905,743                      $8,672,692                        $8,532,173 $8,505,776

    Interest-earning assets                       $8,005,945                                    $7,937,308                      $7,711,531                        $7,560,288 $7,529,040

    Loans                                         $5,827,440                                    $5,762,048                      $5,712,614                        $5,542,489 $5,414,942

    Securities, including Federal Home
     Loan Bank stock                              $2,147,457                                    $2,136,703                      $1,945,174                        $1,976,959 $2,068,806

    Deposits                                      $7,445,693                                    $7,440,628                      $7,233,863                        $6,978,472 $6,927,756

    Interest-bearing deposits                     $3,983,314                                    $3,933,001                      $3,910,695                        $3,753,101 $4,157,491

    Interest-bearing liabilities                  $4,124,582                                    $4,031,214                      $4,007,198                        $3,961,013 $4,395,502

    Noninterest-bearing deposits                  $3,462,379                                    $3,507,627                      $3,323,168                        $3,225,371 $2,770,265

    Shareholders' equity                          $1,258,411                                    $1,259,117                      $1,239,830                        $1,247,887 $1,240,853

    Financial Ratios
    ----------------

    Return on average assets                0.95%                       1.20%                               1.19%                  1.03%                1.15%

    Return on average common equity         6.76%                       8.50%                               8.32%                  7.04%                7.86%

    Average equity to average assets       14.06%                      14.14%                              14.30%                 14.63%               14.59%

    Net interest margin (tax
     equivalent)                            4.13%                       4.25%                               4.37%                  4.41%                4.39%

    Period end
    ----------

    Total assets                                  $9,035,932                                    $8,951,697                      $8,755,984                        $8,518,019 $8,552,902

    Loans, net of unearned income                 $5,877,283                                    $5,815,027                      $5,746,511                        $5,611,897 $5,450,895

    Allowance for loan and lease losses              $69,264                                       $68,172                         $69,049                           $69,257    $70,234

    Securities, including Federal Home
     Loan Bank stock                              $2,196,407                                    $2,170,416                      $2,037,666                        $1,926,248 $2,040,163

    Deposits                                      $7,596,949                                    $7,438,829                      $7,314,805                        $7,044,373 $7,074,965

    Core deposits                                 $7,285,067                                    $7,127,866                      $6,986,206                        $6,737,969 $6,771,755

    Shareholders' equity                          $1,260,788                                    $1,242,128                      $1,254,136                        $1,236,214 $1,244,443

    Nonperforming, assets
    ---------------------

    Nonaccrual loans                                 $36,891                                       $21,464                         $19,080                           $25,746    $31,828

    OREO and OPPO                          12,427                       13,738                               19,475                  20,665                23,347
                                           ------                       ------                               ------                  ------                ------

       Total nonperforming assets                    $49,318                                       $35,202                         $38,555                           $46,411    $55,175
                                                     -------                                       -------                         -------                           -------    -------

    Nonperforming loans to period-end
     loans                                  0.63%                       0.37%                               0.33%                  0.46%                0.58%

    Nonperforming assets to period-end
     assets                                 0.55%                       0.39%                               0.44%                  0.54%                0.65%

    Allowance for loan and lease losses
     to period-end loans                    1.18%                       1.17%                               1.20%                  1.23%                1.29%

    Net loan charge-offs                              $4,162                                        $3,226                          $3,039                            $3,179       $544


    LOAN PORTFOLIO COMPOSITION

    Columbia Banking System, Inc.

    Unaudited                     March 31,             December 31,             September 30,                June 30,                    March 31,

                                        2016                     2015                       2015                      2015                          2015
                                        ----                     ----                       ----                      ----                          ----

    Loan Portfolio
     Composition -
     Dollars                                                                (dollars in thousands)
    --------------

    Commercial business                      $2,401,193                                            $2,362,575                                            $2,354,731                               $2,255,468  $2,139,873

    Real estate:

    One-to-four family
     residential                     175,050                            176,295                                   177,108                                    181,849                   173,739

    Commercial and
     multifamily
     residential                   2,520,352                          2,491,736                                 2,449,847                                  2,406,594                 2,374,454
                                   ---------                          ---------                                 ---------                                  ---------                 ---------

       Total real estate           2,695,402                          2,668,031                                 2,626,955                                  2,588,443                 2,548,193

    Real estate
     construction:

    One-to-four family
     residential                     133,447                            135,874                                   136,783                                    127,311                   124,017

    Commercial and
     multifamily
     residential                     183,548                            167,413                                   134,097                                    129,302                   119,880
                                     -------                            -------                                   -------                                    -------                   -------

       Total real estate
        construction                 316,995                            303,287                                   270,880                                    256,613                   243,897

    Consumer                         329,902                            342,601                                   348,315                                    358,365                   352,960

    Purchased credit
     impaired                        173,201                            180,906                                   191,066                                    202,367                   219,839
                                     -------                            -------                                   -------                                    -------                   -------

    Subtotal loans                 5,916,693                          5,857,400                                 5,791,947                                  5,661,256                 5,504,762

    Less:  Net unearned
     income                         (39,410)                          (42,373)                                 (45,436)                                  (49,359)                 (53,867)
                                     -------                            -------                                   -------                                    -------                   -------

    Loans, net of
     unearned income               5,877,283                          5,815,027                                 5,746,511                                  5,611,897                 5,450,895

    Less:  Allowance for
     loan and lease
     losses                         (69,264)                          (68,172)                                 (69,049)                                  (69,257)                 (70,234)

    Total loans, net               5,808,019                          5,746,855                                 5,677,462                                  5,542,640                 5,380,661
                                   =========                          =========                                 =========                                  =========                 =========

    Loans held for sale                          $3,681                                                $4,509                                                $6,637                                   $4,220      $3,545
                                                 ======                                                ======                                                ======                                   ======      ======


                                             March 31,                           December 31,                             September 30,                              June 30,                  March 31,

    Loan Portfolio
     Composition -
     Percentages                                   2016                                    2015                                      2015                                    2015                        2015
    --------------                                 ----                                    ----                                      ----                                    ----                        ----

    Commercial business                           40.9%                                                40.6%                                                41.0%                                   40.2%      39.3%

    Real estate:

    One-to-four family
     residential                                   3.0%                                                 3.0%                                                 3.1%                                    3.2%       3.2%

    Commercial and
     multifamily
     residential                                  42.9%                                                42.9%                                                42.6%                                   42.9%      43.5%
                                                   ----                                                  ----                                                  ----                                     ----        ----

       Total real estate                          45.9%                                                45.9%                                                45.7%                                   46.1%      46.7%

    Real estate
     construction:

    One-to-four family
     residential                                   2.3%                                                 2.3%                                                 2.4%                                    2.3%       2.3%

    Commercial and
     multifamily
     residential                                   3.1%                                                 2.9%                                                 2.3%                                    2.3%       2.2%
                                                    ---                                                   ---                                                   ---                                      ---         ---

       Total real estate
        construction                               5.4%                                                 5.2%                                                 4.7%                                    4.6%       4.5%

    Consumer                                       5.6%                                                 5.9%                                                 6.1%                                    6.4%       6.5%

    Purchased credit
     impaired                                      2.9%                                                 3.1%                                                 3.3%                                    3.6%       4.0%
                                                    ---                                                   ---                                                   ---                                      ---         ---

    Subtotal loans                               100.7%                                               100.7%                                               100.8%                                  100.9%     101.0%

    Less:  Net unearned
     income                                      (0.7)%                                               (0.7)%                                               (0.8)%                                  (0.9)%     (1.0)%
                                                  -----                                                 -----                                                 -----                                    -----       -----

    Loans, net of
     unearned income                             100.0%                                               100.0%                                               100.0%                                  100.0%     100.0%




    DEPOSIT COMPOSITION

    Columbia Banking System, Inc.

    Unaudited

                                  March 31,            December 31,                       September 30,                    June 30,                    March 31,

                                       2016                         2015                            2015                            2015                          2015
                                       ----                         ----                            ----                            ----                          ----

    Deposit Composition -
     Dollars                                                            (dollars in thousands)
    ---------------------

    Core deposits:

    Demand and other non-
     interest bearing                       $3,553,468                                         $3,507,358                                $3,386,968                                $3,207,538  $3,260,376

    Interest bearing
     demand                         958,469                        925,909                                  911,686                          912,637                     901,684

    Money market                  1,838,364                      1,788,552                                1,776,087                        1,718,000                   1,700,014

    Savings                         695,588                        657,016                                  651,695                          630,897                     630,423

    Certificates of
     deposit less than
     $100,000                       239,178                        249,031                                  259,770                          268,897                     279,258
                                    -------                        -------                                  -------                          -------                     -------

       Total core deposits        7,285,067                      7,127,866                                6,986,206                        6,737,969                   6,771,755


    Certificates of
     deposit greater than
     $100,000                       170,126                        182,973                                  184,047                          194,449                     199,728

    Certificates of
     deposit insured by
     CDARS(R)                        24,752                         26,901                                   26,975                           18,357                      18,430

    Brokered money market
     accounts                       116,878                        100,854                                  117,196                           93,061                      84,336
                                    -------                        -------                                  -------                           ------                      ------

    Subtotal                      7,596,823                      7,438,594                                7,314,424                        7,043,836                   7,074,249

    Premium resulting
     from acquisition
     date fair value
     adjustment                         126                            235                                      381                              537                         716
                                        ---                            ---                                      ---                              ---                         ---

    Total deposits                          $7,596,949                                         $7,438,829                                $7,314,805                                $7,044,373  $7,074,965
                                            ==========                                         ==========                                ==========                                ==========  ==========


                                            March 31,                       December 31,                            September 30,                    June 30,                   March 31,

    Deposit Composition -
     Percentages                                  2016                               2015                                      2015                          2015                         2015
    ---------------------                         ----                               ----                                      ----                          ----                         ----

    Core deposits:

    Demand and other non-
     interest bearing                            46.8%                                             47.2%                                    46.3%                                    45.5%      46.2%

    Interest bearing
     demand                                      12.6%                                             12.4%                                    12.5%                                    13.0%      12.7%

    Money market                                 24.2%                                             24.0%                                    24.3%                                    24.4%      24.0%

    Savings                                       9.2%                                              8.8%                                     8.9%                                     9.0%       8.9%

    Certificates of
     deposit less than
     $100,000                                     3.1%                                              3.3%                                     3.6%                                     3.8%       3.9%
                                                   ---                                                ---                                       ---                                       ---         ---

    Total core deposits                          95.9%                                             95.7%                                    95.6%                                    95.7%      95.7%


    Certificates of
     deposit greater than
     $100,000                                     2.3%                                              2.5%                                     2.4%                                     2.7%       2.8%

    Certificates of
     deposit insured by
     CDARS(R)                                     0.3%                                              0.4%                                     0.4%                                     0.3%       0.3%

    Brokered money market
     accounts                                     1.5%                                              1.4%                                     1.6%                                     1.3%       1.2%
                                                   ---                                                ---                                       ---                                       ---         ---

    Total                                       100.0%                                            100.0%                                   100.0%                                   100.0%     100.0%




    CONSOLIDATED STATEMENTS OF INCOME

    Columbia Banking
     System, Inc.                                          Three Months Ended
                                                           ------------------

    Unaudited                         March 31,            December 31,              March 31,

                                            2016                2015 (1)                2015 (1)
                                            ----                 -------                 -------

                                                   (in thousands except per share)

    Interest Income

    Loans                                        $70,316                                         $71,358          $70,822

    Taxable securities                     8,017                               8,516                        7,526

    Tax-exempt
     securities                            2,803                               2,870                        3,042

    Deposits in banks                         38                                  25                           27
                                             ---                                 ---                          ---

    Total interest
     income                               81,174                              82,769                       81,417

    Interest Expense

    Deposits                                 742                                 733                          748

    Federal Home Loan
     Bank advances                           124                                  83                          159

    Other borrowings                         138                                 134                          146
                                             ---                                 ---                          ---

    Total interest
     expense                               1,004                                 950                        1,053
                                           -----                                 ---                        -----

    Net Interest Income                   80,170                              81,819                       80,364

    Provision for loan
     and lease losses                      5,254                               2,349                        1,209
                                           -----                               -----                        -----

    Net interest income
     after provision for
     loan and lease
     losses                               74,916                              79,470                       79,155

    Noninterest Income

    Deposit account and
     treasury management
     fees (1)                              6,989                               7,010                        6,860

    Card revenue (1)                       5,652                               5,776                        5,363

    Financial services
     and trust revenue
     (1)                                  2,821                               2,940                        3,124

    Loan revenue (1)                       2,262                               2,808                        2,603

    Merchant processing
     revenue                               2,102                               2,173                        2,040

    Bank owned life
     insurance                             1,116                               1,071                        1,078

    Investment
     securities gains,
     net                                     373                                 281                          721

    Change in FDIC loss-
     sharing asset                       (1,103)                            (1,031)                         150

    Other (1)                                434                               3,717                          828
                                             ---                               -----                          ---

    Total noninterest
     income                               20,646                              24,745                       22,767

    Noninterest Expense

    Compensation and
     employee benefits                    36,319                              36,689                       39,100

    Occupancy                             10,173                              10,037                        7,993

    Merchant processing
     expense                               1,033                               1,058                          977

    Advertising and
     promotion                               842                               1,233                          931

    Data processing                        4,146                               4,399                        4,984

    Legal and
     professional fees                     1,325                               2,081                        2,507

    Taxes, licenses and
     fees                                  1,290                               1,392                        1,232

    Regulatory premiums                    1,141                               1,180                        1,221

    Net cost (benefit)
     of operation of
     other real estate
     owned                                   104                                (60)                     (1,246)

    Amortization of
     intangibles                           1,583                               1,652                        1,817

    Other                                  7,118                               7,216                        7,218
                                           -----                               -----                        -----

    Total noninterest
     expense                              65,074                              66,877                       66,734
                                          ------                              ------                       ------

    Income before income
     taxes                                30,488                              37,338                       35,188

    Provision for income
     taxes                                 9,229                              10,598                       10,827
                                           -----                              ------                       ------

    Net Income                                   $21,259                                         $26,740          $24,361
                                                 =======                                         =======          =======

    Earnings per common
     share

    Basic                                          $0.37                                           $0.46            $0.42

    Diluted                                        $0.37                                           $0.46            $0.42

    Dividends paid per
     common share                                  $0.38                                           $0.36            $0.30

    Weighted average
     number of common
     shares outstanding                   57,114                              57,057                       56,965

    Weighted average
     number of diluted
     common shares
     outstanding                          57,125                              57,070                       56,978


    (1)              Reclassified to conform to the current
                     period's presentation.
                     Reclassifications consisted of
                     disaggregating income previously
                     presented as 'Service charges and other
                     fees' and certain income previously
                     presented in 'Other' into the
                     presentation above.  There was no
                     change to total noninterest income as
                     previously reported as a result of
                     these reclassifications.




    CONSOLIDATED BALANCE SHEETS

    Columbia Banking System, Inc.

    Unaudited                                                                                                                                                        March 31,                       December 31,

                                                                                                                                                                              2016                            2015
                                                                                                                                                                              ----                            ----

                                                                                                                                                                           (in thousands)

                                                                                                  ASSETS

    Cash and due from banks                                                                                                                                                 $150,683                                 $166,929

    Interest-earning deposits with banks                                                                                                                         38,248                              8,373
                                                                                                                                                                 ------                              -----

    Total cash and cash equivalents                                                                                                                             188,931                            175,302

    Securities available for sale at fair value (amortized cost of $2,156,999 and $2,157,610, respectively)    2,186,166                             2,157,694

    Federal Home Loan Bank stock at cost                                                                                                                         10,241                             12,722

    Loans held for sale                                                                                                                                           3,681                              4,509

    Loans, net of unearned income of ($39,410) and ($42,373), respectively                                     5,877,283                             5,815,027

    Less: allowance for loan and lease losses                                                                                                                    69,264                             68,172
                                                                                                                                                                 ------                             ------

    Loans, net                                                                                                                                                5,808,019                          5,746,855

    FDIC loss-sharing asset                                                                                                                                       5,954                              6,568

    Interest receivable                                                                                                                                          29,304                             27,877

    Premises and equipment, net                                                                                                                                 158,101                            164,239

    Other real estate owned                                                                                                                                      12,427                             13,738

    Goodwill                                                                                                                                                    382,762                            382,762

    Other intangible assets, net                                                                                                                                 21,994                             23,577

    Other assets                                                                                                                                                228,352                            235,854

    Total assets                                                                                                                                                          $9,035,932                               $8,951,697
                                                                                                                                                                          ==========                               ==========

                                                                                   LIABILITIES AND SHAREHOLDERS' EQUITY

    Deposits:

    Noninterest-bearing                                                                                                                                                   $3,553,468                               $3,507,358

    Interest-bearing                                                                                                                                          4,043,481                          3,931,471
                                                                                                                                                              ---------                          ---------

    Total deposits                                                                                                                                            7,596,949                          7,438,829

    Federal Home Loan Bank advances                                                                                                                               6,521                             68,531

    Securities sold under agreements to
     repurchase                                                                                                                                                  73,839                             99,699

    Other liabilities                                                                                                                                            97,835                            102,510
                                                                                                                                                                 ------                            -------

    Total liabilities                                                                                                                                         7,775,144                          7,709,569

    Commitments and contingent liabilities

                                                                                                               March 31,               December 31,

                                                                                                                    2016                        2015
                                                                                                                    ----                        ----

    Preferred stock (no par value)                                                                                       (in thousands)

    Authorized shares                                                                                              2,000                                 2,000

    Issued and outstanding                                                                                             9                                     9                              2,217                           2,217

    Common stock (no par value)

    Authorized shares                                                                                            115,000                               115,000

    Issued and outstanding                                                                                        58,008                                57,724                            991,026                         990,281

    Retained earnings                                                                                                                                           255,202                            255,925

    Accumulated other comprehensive income
     (loss)                                                                                                                                                      12,343                            (6,295)
                                                                                                                                                                 ------                             ------

    Total shareholders' equity                                                                                                                                1,260,788                          1,242,128

    Total liabilities and shareholders' equity                                                                                                                            $9,035,932                               $8,951,697
                                                                                                                                                                          ==========                               ==========




    AVERAGE BALANCES AND RATES

    Columbia Banking System, Inc.

    Unaudited

                                                        Three Months Ended                                         Three Months Ended
                                                        ------------------                                         ------------------

                                                          March 31, 2016                                             March 31, 2015
                                                          --------------                                            --------------

                                          Average                  Interest            Average                  Average                   Interest                Average
                                         Balances               Earned / Paid            Rate                  Balances                Earned / Paid                Rate
                                         --------               -------------            ----                  --------                -------------                ----

                                                                              (dollars in thousands)

    ASSETS

    Loans, net (1)(2)                              $5,827,440                                       $71,298                        4.89%                                  $5,414,942                        $71,487         5.28%

    Taxable securities                   1,689,289                             8,017                            1.90%                          1,609,323                        7,526                 1.87%

    Tax exempt securities (2)              458,168                             4,312                            3.76%                            459,483                        4,680                 4.07%

    Interest-earning deposits
     with banks                             31,048                                38                            0.49%                             45,292                           27                 0.24%
                                            ------                               ---                                                              ------                          ---

    Total interest-earning
     assets                              8,005,945                                       $83,665                          4.18%                          7,529,040                            $83,720               4.45%

    Other earning assets                   154,336                                                                            146,055

    Noninterest-earning assets             788,931                                                                            830,681
                                           -------                                                                            -------

    Total assets                                   $8,949,212                                                                                $8,505,776
                                                   ==========                                                                                ==========

    LIABILITIES AND SHAREHOLDERS' EQUITY

    Certificates of deposit                          $448,915                                          $144                        0.13%                                    $502,287                           $240         0.19%

    Savings accounts                       675,876                                17                            0.01%                            625,132                           19                 0.01%

    Interest-bearing demand                927,948                               169                            0.07%                          1,214,149                          138                 0.05%

    Money market accounts                1,930,575                               412                            0.09%                          1,815,923                          351                 0.08%
                                         ---------                               ---                                                           ---------                          ---

    Total interest-bearing
     deposits                            3,983,314                               742                            0.07%                          4,157,491                          748                 0.07%

    Federal Home Loan Bank
     advances                               50,569                               124                            0.98%                            129,841                          159                 0.49%

    Other borrowings                        90,699                               138                            0.61%                            108,170                          146                 0.54%
                                            ------                               ---                                                             -------                          ---

    Total interest-bearing
     liabilities                         4,124,582                                        $1,004                          0.10%                          4,395,502                             $1,053               0.10%

    Noninterest-bearing
     deposits                            3,462,379                                                                          2,770,265

    Other noninterest-bearing
     liabilities                           103,840                                                                             99,156

    Shareholders' equity                 1,258,411                                                                          1,240,853
                                         ---------                                                                          ---------

    Total liabilities &
     shareholders' equity                          $8,949,212                                                                                $8,505,776
                                                   ==========                                                                                ==========

    Net interest income (tax equivalent)                                                               $82,661                                                                        $82,667
                                                                                                       =======                                                                        =======

    Net interest margin (tax equivalent)                                                                                                                   4.13%                                                     4.39%
                                                                                                                                                            ====                                                       ====


    (1)              Nonaccrual loans have been
                     included in the tables as loans
                     carrying a zero yield.
                     Amortized net deferred loan
                     fees and net unearned discounts
                     on acquired loans were included
                     in the interest income
                     calculations. The amortization
                     of net deferred loan fees was
                     $1.1 million for both three
                     month periods ended March 31,
                     2016 and March 31, 2015. The
                     incremental accretion on
                     acquired loans was $4.7 million
                     and $7.5 million for the three
                     months ended March 31, 2016 and
                     2015, respectively.


    (2)              Tax-exempt income is calculated
                     on a tax equivalent basis. The
                     tax equivalent yield adjustment
                     to interest earned on loans was
                     $982 thousand and $665 thousand
                     for the three months ended
                     March 31, 2016 and 2015,
                     respectively. The tax
                     equivalent yield adjustment to
                     interest earned on tax exempt
                     securities was $1.5 million and
                     $1.6 million for the three
                     months ended March 31, 2016 and
                     2015, respectively.




    AVERAGE BALANCES AND RATES

    Columbia Banking System, Inc.

    Unaudited

                                                        Three Months Ended                                         Three Months Ended
                                                        ------------------                                         ------------------

                                                          March 31, 2016                                            December 31, 2015
                                                          --------------                                           -----------------

                                          Average                  Interest            Average                  Average                   Interest                Average
                                         Balances               Earned / Paid            Rate                  Balances                Earned / Paid                Rate
                                         --------               -------------            ----                  --------                -------------                ----

                                                                              (dollars in thousands)

    ASSETS

    Loans, net (1)(2)                              $5,827,440                                       $71,298                        4.89%                                  $5,762,048                        $72,322         5.02%

    Taxable securities                   1,689,289                             8,017                            1.90%                          1,686,594                        8,516                 2.02%

    Tax exempt securities (2)              458,168                             4,312                            3.76%                            450,109                        4,417                 3.93%

    Interest-earning deposits
     with banks                             31,048                                38                            0.49%                             38,557                           25                 0.26%
                                            ------                               ---                                                              ------                          ---

    Total interest-earning
     assets                              8,005,945                                       $83,665                          4.18%                          7,937,308                            $85,280               4.30%

    Other earning assets                   154,336                                                                            153,298

    Noninterest-earning assets             788,931                                                                            815,137
                                           -------                                                                            -------

    Total assets                                   $8,949,212                                                                                $8,905,743
                                                   ==========                                                                                ==========

    LIABILITIES AND SHAREHOLDERS' EQUITY

    Certificates of deposit                          $448,915                                          $144                        0.13%                                    $460,858                           $179         0.16%

    Savings accounts                       675,876                                17                            0.01%                            653,738                           17                 0.01%

    Interest-bearing demand                927,948                               169                            0.07%                            920,021                          161                 0.07%

    Money market accounts                1,930,575                               412                            0.09%                          1,898,384                          376                 0.08%
                                         ---------                               ---                                                           ---------                          ---

    Total interest-bearing
     deposits                            3,983,314                               742                            0.07%                          3,933,001                          733                 0.07%

    Federal Home Loan Bank
     advances                               50,569                               124                            0.98%                             18,915                           83                 1.76%

    Other borrowings                        90,699                               138                            0.61%                             79,298                          134                 0.68%
                                            ------                               ---                                                              ------                          ---

    Total interest-bearing
     liabilities                         4,124,582                                        $1,004                          0.10%                          4,031,214                               $950               0.09%

    Noninterest-bearing
     deposits                            3,462,379                                                                          3,507,627

    Other noninterest-bearing
     liabilities                           103,840                                                                            107,785

    Shareholders' equity                 1,258,411                                                                          1,259,117
                                         ---------                                                                          ---------

    Total liabilities &
     shareholders' equity                          $8,949,212                                                                                $8,905,743
                                                   ==========                                                                                ==========

    Net interest income (tax equivalent)                                                               $82,661                                                                        $84,330
                                                                                                       =======                                                                        =======

    Net interest margin (tax equivalent)                                                                                                                   4.13%                                                     4.25%
                                                                                                                                                            ====                                                       ====


    (1)              Nonaccrual loans have been
                     included in the tables as loans
                     carrying a zero yield. Amortized
                     net deferred loan fees and net
                     unearned discounts on acquired
                     loans were included in the
                     interest income calculations. The
                     amortization of net deferred loan
                     fees was $1.1 million for both
                     three month periods ended March
                     31, 2016 and December 31, 2015.
                     The incremental accretion on
                     acquired loans was $4.7 million
                     and $6.0 million for the three
                     months ended March 31, 2016 and
                     December 31, 2015, respectively.


    (2)              Tax-exempt income is calculated
                     on a tax equivalent basis. The
                     tax equivalent yield adjustment
                     to interest earned on loans was
                     $982 thousand and $964 thousand
                     for the three months ended March
                     31, 2016 and December 31, 2015,
                     respectively. The tax equivalent
                     yield adjustment to interest
                     earned on tax exempt securities
                     was $1.5 million for both three
                     month periods ended March 31,
                     2016 and December 31, 2015.

Non-GAAP Financial Measures

The Company considers its operating net interest margin and operating efficiency ratios to be important measurements as they more closely reflect the ongoing operating performance of the Company. Despite the importance of the operating net interest margin and operating efficiency ratio to the Company, there are no standardized definitions for them and, as a result, the Company's calculations may not be comparable with other organizations. The Company encourages readers to consider its consolidated financial statements in their entirety and not to rely on any single financial measure.

The following tables reconcile the Company's calculation of the operating net interest margin and operating efficiency ratio:



                                                     Three Months Ended
                                                     ------------------

                            March 31,               December 31,              March 31,

                                  2016                       2015                     2015
                                  ----                       ----                     ----

    Operating net interest
     margin non-GAAP
     reconciliation:                            (dollars in thousands)

    Net interest income
     (tax equivalent) (1)                 $82,661                                             $84,330              $82,667
                                          -------                                             -------              -------

    Adjustments to arrive
     at operating net
     interest income (tax
     equivalent):

    Incremental accretion
     income on FDIC
     purchased credit
     impaired loans            (1,657)                               (2,200)                          (2,447)

    Incremental accretion
     income on other FDIC
     acquired loans (2)              -                                  (68)                            (117)

    Incremental accretion
     income on other
     acquired loans            (3,073)                               (3,746)                          (4,934)

    Premium amortization on
     acquired securities         2,324                                  2,253                             2,861

    Interest reversals on
     nonaccrual loans              453                                    582                               650

    Operating net interest
     income (tax
     equivalent) (1)                      $80,708                                             $81,151              $78,680
                                          =======                                             =======              =======

    Average interest
     earning assets                    $8,005,945                                          $7,937,308           $7,529,040

    Net interest margin
     (tax equivalent) (1)        4.13%                                 4.25%                            4.39%

    Operating net interest
     margin (tax
     equivalent) (1)             4.03%                                 4.09%                            4.18%


                                                  Three Months Ended
                                                  ------------------

                            March 31,               December 31,              March 31,

                                  2016                       2015                     2015
                                  ----                       ----                     ----

    Operating efficiency
     ratio non-GAAP
     reconciliation:                            (dollars in thousands)

    Noninterest expense
     (numerator A)                        $65,074                                             $66,877              $66,734

    Adjustments to arrive
     at operating
     noninterest expense:

    Acquisition-related
     expenses                  (2,436)                               (1,872)                          (2,974)

    Net benefit (cost) of
     operation of OREO and
     OPPO                        (102)                                   150                             1,241

    FDIC clawback liability
     expense                     (209)                                 (812)                             (23)

    Loss on asset disposals      (160)                                  (52)                             (96)

    State of Washington
     Business and
     Occupation ("B&O")
     taxes                     (1,171)                               (1,294)                          (1,129)

    Operating noninterest
     expense (numerator B)                $60,996                                             $62,997              $63,753


    Net interest income
     (tax equivalent) (1)                 $82,661                                             $84,330              $82,667

    Noninterest income          20,646                                 24,745                            22,767

    Bank owned life
     insurance tax
     equivalent adjustment         600                                    576                               581
                                   ---                                    ---                               ---

    Total revenue (tax
     equivalent)
     (denominator A)                     $103,907                                            $109,651             $106,015


    Operating net interest
     income (tax
     equivalent) (1)                      $80,708                                             $81,151              $78,680

    Adjustments to arrive
     at operating
     noninterest income
     (tax equivalent):

    Investment securities
     gains, net                  (373)                                 (281)                            (721)

    Gain on asset disposals       (54)                                   (4)                                -

    Mortgage loan
     repurchase liability
     adjustment                      -                               (3,147)                                -

    Change in FDIC loss-
     sharing asset               1,103                                  1,031                             (150)
                                                                       -----

    Operating noninterest
     income (tax
     equivalent)                21,922                                 22,920                            22,477
                                ------                                 ------                            ------

    Total operating revenue
     (tax equivalent)
     (denominator B)                     $102,630                                            $104,071             $101,157

    Efficiency ratio (tax
     equivalent) (numerator
     A/denominator A)           62.63%                                60.99%                           62.95%

    Operating efficiency
     ratio (tax equivalent)
     (numerator B/
     denominator B)             59.43%                                60.53%                           63.02%



    (1)              Tax-exempt interest income has been
                     adjusted to a tax equivalent basis. The
                     amount of such adjustment was an
                     addition to net interest income of $2.5
                     million, $2.5 million and $2.3 million
                     for the three months ended March 31,
                     2016, December 31, 2015 and March 31,
                     2015, respectively.


    (2)              For 2016, incremental accretion income
                     on other FDIC acquired loans is no
                     longer considered significant and will
                     no longer be tracked for these non-
                     GAAP financial measures.

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SOURCE Columbia Banking System, Inc.