A M Castle : 10/25/16 - A. M. Castle & Co. Receives Notice Regarding NYSE Continued Listing Standards

1420 Kensington Road

Suite 220 Oak Brook, IL 60523 P: (847) 455-7111

F: (847) 241-8171

M. CASTLE & CO. REPORTS SECOND QUARTER 2016 RESULTS

Realized sequential quarterly and year-over-year improvement in key financial performance metrics

• Gross material margin improved year-over-year, sequentially and each month of the quarter;

• Excluding closed Houston and Edmonton branches, sales tons per day increased by 5% from the first quarter 2016 and roughly 1% from the second quarter 2015;

• Operating expenses were $44.3 million in the second quarter 2016, compared to $70.2 million in the second quarter 2015 and $57.0 million in the first quarter 2016. Excluding restructuring expenses, operating expenses decreased to $42.3 million in the second quarter 2016, compared to $54.6 million in the second quarter 2015 (a decrease in cash operating expenses of 24.1% on a per ton basis) and $45.2 million in the first quarter 2016;

• Announced sale of 50% equity ownership in Kreher Steel Company, LLC ("Kreher") to joint venture partner;

• Made early payment of $5.5 million in settlement of the remaining principal balance of Senior Secured Notes due December 15, 2016.

President and CEO Steve Scheinkman commented, "The second quarter marked the completion of our strategic restructuring plan announced in April of last year. The financial performance recorded in the second quarter demonstrates the emergence of a leaner, more focused A.M. Castle that built momentum during each month of the quarter. In the period, we realized both year-over-year and sequential quarter improvement in key financial performance metrics, including tons sold per day and operating expenses, both in absolute terms and cost per ton. Excluding tons sold by our Houston and Edmonton facilities, which we closed in February 2016 as a result of our strategic decision to reduce our exposure to the oil and gas market, tons sold per day increased by 5% compared to the first quarter of this year and roughly 1% compared to second quarter 2015."

Scheinkman continued, "According to leading industry publications, the service center industry experienced an increase in tons shipped per day from the first quarter of 2016 of less than 1% and a decline in tons shipped per day of approximately 5% compared to the prior year second quarter. Even without improvement in market demand and replacement cost of the majority of our products, we achieved sequential and year-over-year growth in sales tons and gross material margins as a result of the aggressive organizational actions we have taken over the last year to restructure our branch network costs, better align our sales force with customers' needs, increase our transactional business, and improve our capital structure. We believe these results bode well for our ability to further improve our financial performance as market demand and pricing improves."

Net sales in the second quarter 2016 were $130.7 million, a decrease of $35.6 million, or 21.4%, compared to the second quarter 2015. The decrease in net sales was mainly attributable to a 6.4% decrease in tons sold per day compared to the same period last

year, coupled with a 13.9% decrease in average selling prices. Impacting the decrease in net tons sold per day were sales attributable to the Company's Houston and Edmonton operations, which were closed in February 2016. Excluding the tons sold from the Houston and Edmonton operations in the second quarter 2015, tons sold per day increased roughly 1% in the second quarter 2016 compared to the second quarter 2015.

Loss from continuing operations in the second quarter 2016 was $21.3 million, or a loss from continuing operations of $0.77 per diluted common share, compared to a loss from continuing operations of $47.1 million, or a loss from continuing operations of

$2.00 per diluted common share, in the second quarter 2015 and $44.8 million, or a loss from continuing operations of $1.90 per diluted common share, in the first quarter 2016. Adjusted non-GAAP loss from continuing operations for the second quarter 2016 was $17.7 million compared to adjusted non-GAAP loss from continuing operations of $11.5 million in the second quarter 2015. Adjusted non-GAAP loss from continuing operations was $26.1 million in the first quarter 2016. Negative EBITDAfrom continuing operations in the second quarter 2016 was $6.9 million, compared to negative EBITDA from continuing operations of $45.7 million in the second quarter 2015 and $30.4 million in the first quarter 2016. The Company had negative adjusted EBITDA from continuing operations of $3.4 million in the second quarter 2016 compared with negative adjusted EBITDA from continuing operations of

$10.1 million in the second quarter 2015 and $11.6 million in the first quarter 2016.

Total restructuring activity recorded during the second quarter 2016 resulted in expense of $2.0 million compared to expense from restructuring activity of $15.6 million in the prior year period. Restructuring activity in the second quarter 2016 consisted mainly of moving costs associated with plant consolidations related to the April 2015 strategic restructuring plan and lease termination costs associated with the closure of the Houston and Edmonton facilities.

Gross material margin, calculated as net sales less cost of materials (exclusive of depreciation and amortization) divided by net sales, was 25.3% in the second quarter 2016 compared to 8.5% in the second quarter 2015. The gross material margin in the second quarter 2015 was negatively impacted by $22.3 million of inventory scrapping expenses associated with restructuring activity in that quarter. Excluding those expenses recognized in cost of material, adjusted gross material margin in the second quarter 2015 was 21.9%. Gross material margin in the first quarter 2016 was 18.4% and adjusted gross material margin, which excludes the

$27.1 million sale of inventory at the Company's Houston and Edmonton facilities and a $0.5 million charge to cost of material for inventory scrapped related to restructuring activities, was 22.3%.

Along with the lower cost structure implemented by the Company through its April 2015 strategic restructuring plan, the closure of its Houston and Edmonton facilities had a favorable impact on operating expenses in the second quarter 2016. Operating expenses were $44.3 million in the second quarter 2016, compared to $70.2 million in the second quarter 2015 and $57.0 million in the first quarter 2016. Excluding restructuring expenses, operating expenses were $42.3 million in the second quarter 2016, compared to $54.6 million in the second quarter 2015 and $45.2 million in the first quarter 2016.

Executive Vice President and CFO, Pat Anderson, commented, "The lower cost structure we envisioned when announcing our strategic restructuring activities in April of last year has now largely been achieved as evidenced by the substantial decrease in year-over-year operating expenses, as well as improved gross material margin. We believe this, along with our improved capital structure resulting from our refinancing efforts, has positioned us well for profitable growth in the coming years."

Net cash used in operating activities of continuing operations was $19.2 million during the six months ended June 30, 2016, compared to $19.8 million during the six months ended June 30, 2015. Net cash from investing activities of $54.5 million during the six months ended June 30, 2016 is attributable to cash proceeds from the sale of Total Plastics Inc. ("TPI") in the first quarter 2016. The proceeds from the sale of TPI were used to pay down the Company's long-term debt, which, along with the $8.7 million payment of debt restructuring costs, resulted in net cash used in financing activities of $29.2 million during the first six months of 2016. The Company had $46.0 million of borrowings outstanding under its revolving credit facility at June 30, 2016, and $14.0 million of additional unrestricted borrowing capacity available under its revolving credit facility. The Company had $66.1 million in borrowings under the revolving credit facility at December 31, 2015. The Company's net debt-to-capital ratio was 94.6% at June 30, 2016, compared to 84.1% at December 31, 2015. Total long-term debt outstanding, net of unamortized discount, unamortized debt issuance costs and the derivative liability for the embedded conversion feature of the Company's convertible notes, was $280.4 million at June 30, 2016 and $317.6 million at December 31, 2015. Refer to the "Total Long-Term Debt" table below for details related to the Company's outstanding debt obligations.

On August 8, 2016, the Company announced it has entered into an agreement for the sale of its 50% equity interest in Kreher to its joint venture partner for proceeds of approximately $31.6 million, subject to formal corporate approval by both joint venture partners' boards of directors. "We intend to use the proceeds from the sale of Kreher to further pay down our long-term debt. We also recently made an early payment of $5.5 million to settle the remaining principal balance of our 12.75% Senior Secured Notes due December 15, 2016," said Anderson.

Scheinkman concluded, "While we are pleased with the improvement in our financial performance in the quarter, we know we still have more work to do and we continue to aggressively pursue opportunities for further improvement. Although the third

quarter is historically one of our slower periods due to normal seasonality in the summer months, we enter the second half of the year more confident that the positive financial trends we saw in the second quarter will position us well to expand our customer base and grow our business over the long term."

Management will hold a conference call at 11:00 a.m. ET today to review the Company's results for the second quarter ended June 30, 2016 and discuss market conditions and business outlook. The call can be accessed via the internet live or as a replay. Those who would like to listen to the call may access the webcast through a link on the investor relations page of the Company's website at http://www.castlemetals.com/investors or by calling (800) 708-4540 or (847) 619-6397 and citing code 4301 9550#.

An archived version of the conference call webcast will be available for replay at the link above approximately three hours following its conclusion, and will remain available until the next earnings conference call.

Founded in 1890, A. M. Castle & Co. is a global distributor of specialty metal and supply chain services, principally serving the producer durable equipment, commercial aircraft, heavy equipment, industrial goods, construction equipment, and retail sectors of the global economy. Its customer base includes many Fortune 500 companies as well as thousands of medium and smaller- sized firms spread across a variety of industries. It specializes in the distribution of alloy and stainless steels; nickel alloys; aluminum and carbon. Together, Castle and its affiliated companies operate out of 21 metals service centers located throughout North America, Europe and Asia. Its common stock is traded on the New York Stock Exchange under the ticker symbol "CAS".

This release and the financial statements included in this release include non-GAAP financial measures. The non-GAAP financial information should be considered supplemental to, and not as a substitute for, or superior to, financial measures calculated in accordance with GAAP. However, we believe that non-GAAP reporting, giving effect to the adjustments shown in the reconciliation contained in this release and in the attached financial statements, provides meaningful information and therefore we use it to supplement our GAAP reporting and guidance. Management often uses this information to assess and measure the performance of our business. We have chosen to provide this supplemental information to investors, analysts and other interested parties to enable them to perform additional analysis of operating results, to illustrate the results of operations giving effect to the non-GAAP adjustments shown in the reconciliations and to assist with period-over-period comparisons of such operations. The exclusion of the charges indicated herein from the non-GAAP financial measures presented does not indicate an expectation by the Company that similar charges will not be incurred in subsequent periods.

In addition, the Company believes that the use and presentation of EBITDA, which is defined by the Company as income (loss) from continuing operations before provision for income taxes plus depreciation and amortization, and interest expense, less interest income, is widely used by the investment community for evaluation purposes and provides investors, analysts and other interested parties with additional information in analyzing the Company's operating results. Adjusted non-GAAP net income (loss), adjusted non-GAAP income (loss) from continuing operations, adjusted EBITDA, and adjusted gross material margin which are defined as reported net income (loss), reported income (loss) from continuing operations, EBITDA and gross margin adjusted for non- cash items and items which are not considered by management to be indicative of the underlying results, are presented as the Company believes the information is important to provide investors, analysts and other interested parties additional information about the Company's financial performance. Operating expenses, excluding restructuring expense (income), is presented as management believes it provides useful information to investors, analysts and other interested parties regarding the ongoing expenses of the Company. Management uses EBITDA, adjusted non-GAAP net income (loss), adjusted non-GAAP net income (loss) from continuing operations, adjusted EBITDA, operating expenses excluding restructuring expense (income) and adjusted gross material margin to evaluate the performance of the business.

Information provided and statements contained in this release that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended ("Securities Act"), Section 21E of the Securities Exchange Act of 1934, as amended ("Exchange Act"), and the Private Securities Litigation Reform Act of 1995. Such forward-looking statements only speak as of the date of this release and the Company assumes no obligation to update the information included in this release. Such forward-looking statements include information concerning our possible or assumed future results of operations, including descriptions of our business strategy, and the cost savings and other benefits that we expect to achieve from our facility closures and organizational changes. These statements often include words such as "believe," "expect," "anticipate," "intend," "predict," "plan," "should," or similar expressions. These statements are not guarantees of performance or results, and they involve risks, uncertainties, and assumptions. Although we believe that these forward-looking statements are based on reasonable

assumptions, there are many factors that could affect our actual financial results or results of operations and could cause actual results to differ materially from those in the forward-looking statements, including our ability to effectively manage our operational initiatives and restructuring activities, the impact of volatility of metals prices, the cyclical and seasonal aspects of our business, our ability to effectively manage inventory levels, our ability to successfully complete the remaining steps in our strategic refinancing process, and the impact of our substantial level of indebtedness, as well as including those risk factors identified in Item 1A "Risk Factors" of our Annual Report on Form 10-K for the fiscal year ended December 31, 2015, as amended and our Quarterly Report on Form 10-Q, to be filed shortly. All future written and oral forward-looking statements by us or persons acting on our behalf are expressly qualified in their entirety by the cautionary statements contained or referred to above. Except as required by the federal securities laws, we do not have any obligations or intention to release publicly any revisions to any forward-looking statements to reflect events or circumstances in the future, to reflect the occurrence of unanticipated events or for any other reason.