Unless otherwise indicated, in this Quarterly Report on Form 10-Q, references to
"Catalyst," "we," "us," "our" or the "Company" mean Catalyst Biosciences, Inc.
and our subsidiary. The following discussion and analysis of our financial
condition and results of operations should be read in conjunction with the
unaudited condensed consolidated financial statements and related notes that
appear in this Quarterly Report on Form 10-Q (this "Report") and with the
audited consolidated financial statements and related notes that are included as
part of our Annual Report on Form 10-K for the year ended December 31, 2021
("Annual Report").

In addition to historical information, this Report contains forward-looking
statements within the meaning of Section 27A of the Securities Act of 1933, as
amended, and Section 21E of the Securities Exchange Act of 1934, as amended
("the Exchange Act"). Forward-looking statements are identified by words such as
"believe," "will," "may," "estimate," "continue," "anticipate," "intend,"
"should," "plan," "expect," "predict," "could," "potentially" or the negative of
these terms or similar expressions. You should read these statements carefully
because they discuss future expectations, contain projections of future results
of operations or financial condition, or state other "forward-looking"
information. These statements relate to our future plans, objectives,
expectations, intentions and financial performance and the assumptions that
underlie these statements. For example, forward-looking statements include any
statements regarding the strategies, prospects, plans, expectations or
objectives of management for future operations or the distribution of cash to
Company stockholders, the benefits that may be derived from product candidates
or the commercial or market opportunity in any target indication, our ability to
protect intellectual property rights, our anticipated operations, financial
position, revenues, costs or expenses, statements regarding future economic
conditions or performance, statements of belief and any statement of assumptions
underlying any of the foregoing. These forward-looking statements are subject to
certain risks and uncertainties that could cause actual results to differ
materially from those anticipated in the forward-looking statements. Factors
that might cause such a difference include, but are not limited to, those
discussed in this report in Part II, Item 1A - "Risk Factors," elsewhere in this
Report and in Part I - Item 1A - "Risk Factors" in the Annual Report.
Forward-looking statements are based on our management's beliefs and assumptions
and on information currently available to our management. These statements, like
all statements in this Report, speak only as of their date, and we undertake no
obligation to update or revise these statements in light of future developments.
We caution investors that our business and financial performance are subject to
substantial risks and uncertainties.

Overview



We are a biopharmaceutical company with expertise in protease engineering. Prior
to ceasing research and development activities in March of this year, we had
engineered several protease assets that may address unmet medical needs in
disorders of the complement or coagulation systems. On September 20, 2022, we
made a special, one-time cash dividend payment of $1.43 per share to holders of
our common stock. We anticipate one or more additional special dividends in the
future, although there can be no assurance as to the timing or amounts of any
distributions we make. The actual amount of any distributions will depend on
many factors, including, without limitation, costs and expenses for ongoing
operations, directors and officers liability insurance, tax obligations
including those resulting from the sale of assets to Vertex Pharmaceuticals
Incorporated ("Vertex"), employee severance and other activities related to the
winding down of Company operations, the Company's receipt of some or all of the
$5.0 million hold-back from the Company's sale of assets to Vertex, and
potential proceeds from the sale, license or other disposition of any other
Company assets.

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The following table summarizes our remaining product candidates with their latest stage of development. [[Image Removed]]



Program Status

In February 2022, we announced that we engaged Perella Weinberg Partners as a
financial advisor to assist us in exploring strategic alternatives to monetize
our assets. In May 2022, we entered into an asset purchase agreement with
Vertex, pursuant to which Vertex purchased our complement portfolio, including
CB 2782-PEG and CB 4332, as well as our complement-related intellectual property
including the ProTUNETM and ImmunoTUNETM platforms for $60.0 million in cash
consideration. $55.0 million was received upfront and the remaining $5.0 million
was retained by Vertex as a hold-back until one year after the closing date to
satisfy certain post-closing indemnification obligations. Our clinical stage
coagulation assets are Marzeptacog alfa (activated) ("MarzAA"), an SQ
administered next-generation engineered coagulation Factor VIIa ("FVIIa") for
the treatment of episodic bleeding and prophylaxis in subjects with rare
bleeding disorders, and dalcinonacog alfa ("DalcA"), a next-generation SQ FIX
for prophylaxis in hemophilia B. Both MarzAA and DalcA have shown clinical
efficacy and safety in mid-stage trials and are available for partnering.

Coagulation Programs

MarzAA



MarzAA is an engineered, subcutaneously administered, next-generation
recombinant Factor VIIa. We commenced enrollment of Crimson-1, a Phase 3
registrational trial of MarzAA for episodic treatment of spontaneous or
traumatic bleeding episodes in adolescents and adults with congenital hemophilia
A or hemophilia B with inhibitors in May 2021. We discontinued this trial based
on a number of factors, including challenges in enrollment, competition from
competing approved therapies, the capital requirements to complete the trial,
and other operational factors including effects of the COVID-19 pandemic.
Patients enrolled in the study returned to their standard of care and completed
all required safety assessments. We reported interim data collected prior to
trial termination on July 11 at the 2022 International Society on Thrombosis and
Haemostasis ("ISTH") Congress in London. These data showed that MarzAA was well
tolerated with no injection site reactions, drug-related adverse events, or
thrombotic events. Efficacy data was collected on 14% (66/488) of planned,
evaluable bleeds with SQ MarzAA having an 86.2% treatment success at 24 hours vs
86.5% treatment success for intravenous standard of care at 24 hours. We had
initiated enrollment in a Phase 1/2 trial of MarzAA for treatment of bleeding in
individuals with Factor VII Deficiency, Glanzmann Thrombasthenia, and hemophilia
A with inhibitors on emicizumab prophylaxis. This trial was terminated in
parallel with Crimson-1 in November 2021.

Despite having to discontinue these trials due to logistical, competitive and
financial challenges, we believe a SQ recombinant Factor VIIa therapy, like
MarzAA, has the potential to be an important treatment option for patients with
various bleeding disorders and are exploring opportunities to license or sell
MarzAA to another party for further development.

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DalcA



DalcA is a next-generation SQ Factor IX product candidate for the prophylactic
treatment of individuals with hemophilia B. An open-label, Phase 2b study was
completed in 2020, demonstrating that FIX plasma activity levels were raised
from severe to mild hemophilia B levels and maintained throughout the course of
the study. We have received guidance from the FDA on the design of the
registrational Phase 3 clinical trial, have the necessary data to support its
initiation, and are exploring opportunities to license or sell DalcA to another
party for further development.

Financial Operations Overview

We have no drug products approved for commercial sale and have not generated any revenue from drug product sales.



With the exception of the three months ended June 30, 2022 and nine months ended
September 30, 2022, we have never been profitable and have incurred significant
operating losses in each year since inception. We had net losses of $4.9 million
and $25.2 million for the three months ended September 30, 2022 and 2021,
respectively, and net income of $32.2 million and net losses of $67.6 million
for the nine months ended September 30, 2022 and 2021, respectively. As of
September 30, 2022, we had an accumulated deficit of $370.5 million. As of
September 30, 2022, our cash and cash equivalents balance was $23.1 million.
Substantially all our operating losses were incurred in our research and
development programs and in our general and administrative operations.

License and Collaboration Revenue



License and collaboration revenue consists of revenue earned for performance
obligations satisfied pursuant to our license and collaboration agreement with
Biogen which was entered into in December 2019 and terminated as of May 2022. We
recognized collaboration revenue for reimbursable third-party vendor,
out-of-pocket and personnel costs pertaining to the Biogen Agreement of $0.0
million and $0.8 million for the three and nine months ended September 30, 2022,
respectively, and $2.3 million and $4.9 million for the three and nine months
ended September 30, 2021, respectively.

We have not generated any revenue from the sale of any drug products and we do not expect to generate any revenue from the sale of drug products until we obtain regulatory approval of and commercialize our product candidates.

Cost of License and Collaboration Revenue



Cost of license and collaboration revenue consists of fees for research and
development services payable to third-party vendors, and personnel costs,
corresponding to the recognition of license and collaboration revenue from
Biogen. Cost of license and collaboration revenue does not include any allocated
overhead costs. We recognized third-party vendor, out-of-pocket and personnel
costs, most of which were reimbursable, pertaining to the Biogen Agreement of
$0.0 million and $0.8 million for the three and nine months ended September 30,
2022, respectively, and $2.3 million and $4.9 million for the three and nine
months ended September 30, 2021, respectively, and recorded such costs as cost
of collaboration revenue.

Research and Development Expenses



As of March this year, we ceased the development of certain programs and during
the quarter ended June 30, 2022, we ceased all research and development
activities. Research and development expenses represent costs incurred to
conduct research, such as the discovery and development of our product
candidates. We recognize all research and development costs as they are
incurred. Nonrefundable advance payments for goods or services used in research
and development are deferred and capitalized. The capitalized amounts are then
expensed as the related goods are delivered or services are performed, or until
it is no longer expected that the goods or services will be delivered.

Research and development expenses have traditionally consisted primarily of the following:

• employee-related expenses, which include salaries, benefits and stock-based

compensation;

• laboratory and vendor expenses, including payments to consultants and third


       parties, related to the execution of preclinical, non-clinical, and
       clinical studies;

• the cost of acquiring and manufacturing preclinical and clinical materials

and developing manufacturing processes;

• clinical trial expenses, including costs of third-party clinical research


       organizations;


  • performing toxicity and other preclinical studies; and

• facilities and other allocated expenses, which include direct and allocated


       expenses for rent and maintenance of facilities, depreciation and
       amortization expense and other supplies.


                                       19

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The table below details our internal and external costs for research and development for the period presented (in thousands). See Overview and Program Status for further discussion of the current research and development programs.



                                          Three Months Ended September 30,  

Nine Months Ended September 30,


                                              2022                2021              2022                  2021
Hemophilia                                $        220         $     6,024     $         2,301       $        17,838
Complement                                           -               9,924               4,139                20,449
Personnel and other                                505               4,246               5,648                13,546
Stock-based compensation                            78                 158                 289                   921

Total research and development expenses $ 803 $ 20,352

$ 12,377 $ 52,754




The largest component of our total operating expenses has historically been our
investment in research and development activities, including the clinical and
manufacturing development of our product candidates. Costs listed for our
hemophilia and complement programs above consist of clinical trial,
manufacturing and research costs. Our internal resources, employees and
infrastructure, identified above as personnel and other, are generally not
directly tied to individual product candidates or development programs. As such,
we do not maintain information regarding these costs incurred for these research
and development programs on a project-specific basis.

Since we have ceased our research and development activities, we expect our aggregate research and development expenses will be minimal during the next year as we continue to explore strategic opportunities for the clinical and manufacturing development of our programs.

General and Administrative Expenses



General and administrative expenses consist of personnel costs, allocated
expenses, expenses for outside professional services, including legal, human
resources, audit and accounting services, and other general expenses. Personnel
costs consist of salaries, bonus, benefits and stock-based compensation. We
incur expenses associated with operating as a public company, including expenses
related to compliance with the rules and regulations of the Securities and
Exchange Commission ("SEC") and Nasdaq Stock Market LLC ("Nasdaq"), insurance
expenses, audit expenses, investor relations activities, Sarbanes-Oxley
compliance expenses and other administrative expenses and professional services.
We expect such expenses to fluctuate as we continue to explore strategic
opportunities for our programs.

Results of Operations



The following table set forth our results of operations data for the periods
presented (in thousands):

                                           Three Months Ended September 30,
                                                2022                2021          Change ($)      Change (%)
Revenue:
Collaboration                              $             -       $     2,299     $     (2,299 )          (100 )%
Operating expenses:
Cost of collaboration                                    -             2,307           (2,307 )          (100 )%
Research and development                               803            20,352          (19,549 )           (96 )%
General and administrative                           4,363             4,869             (506 )           (10 )%
Total operating expenses                             5,166            27,528          (22,362 )             *
Loss from operations                                (5,166 )         (25,229 )         20,063               *
Interest and other income (expense), net               282                (9 )            291               *
Net loss                                   $        (4,884 )     $   (25,238 )   $     20,354               *




                                       20

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                                               Nine Months Ended September 30,
                                                 2022                   2021           Change ($)       Change (%)
Revenue:
Collaboration                              $            794       $          4,898     $    (4,104 )            (84 )%
Operating expenses (income):
Cost of collaboration                                   798                  4,926          (4,128 )            (84 )%
Research and development                             12,377                 52,754         (40,377 )            (77 )%
General and administrative                           13,201                 14,799          (1,598 )            (11 )%
Gain on disposal of assets, net                     (57,245 )                    -         (57,245 )            100 %
Total operating expenses (income)                   (30,869 )               72,479        (103,348 )              *
Income (loss) from operations                        31,663                (67,581 )        99,244                *
Interest and other income (expense), net                549                    (23 )           572                *
Net income (loss)                          $         32,212       $        (67,604 )   $    99,816                *


*Not meaningful

License and Collaboration Revenue



No license and collaboration revenue was recognized during the three months
ended September 30, 2022 due to the termination of our Biogen Agreement
effective in May 2022, per Biogen's written termination notice in March 2022.
License and collaboration revenue for the nine months ended September 30, 2022
and for the three and nine months ended September 30, 2021 consisted of
reimbursable collaboration expenses from our Biogen Agreement.

Cost of License and Collaboration



No cost of license and collaboration revenue was recognized during the three
months ended September 30, 2022 due to the termination of our Biogen Agreement.
Cost of license and collaboration revenue for the nine months ended September
30, 2022 and for the three and nine months ended September 30, 2021 primarily
related to reimbursable third-party vendor and personnel costs we incurred
pertaining to the Biogen Agreement.

Research and Development Expenses



Research and development expenses were $0.8 million and $20.4 million during the
three months ended September 30, 2022 and 2021, respectively, a decrease of
$19.6 million, or 96%. The decrease was primarily due to a decrease of $9.9
million in complement-related costs, a decrease of $5.8 million in
hemophilia-related costs, a decrease of $3.8 million in personnel-related costs,
and a $0.1 million decrease in stock-based compensation expense.

Research and development expenses were $12.4 million and $52.8 million during
the nine months ended September 30, 2022 and 2021, respectively, a decrease of
$40.4 million, or 77%. The decrease was due primarily to a decrease of $16.3
million in complement-related costs, a decrease of $15.6 million in
hemophilia-related costs, a decrease of $7.9 million in personnel-related costs,
and a $0.6 million decrease in stock-based compensation expense. Research and
development expenses for the nine months ended September 30, 2022 include
approximately $0.6 million of severance and other costs related to our
reduction-in-force.

General and Administrative Expenses



General and administrative expenses were $4.4 million and $4.9 million during
the three months ended September 30, 2022 and 2021, respectively, a decrease of
$0.5 million, or 10%. This decrease was due primarily to a decrease of $1.2
million in personnel-related costs, partially offset by a $0.6 million increase
in facilities and other administrative costs and an increase of $0.1 million in
professional fees.

General and administrative expenses were $13.2 million and $14.8 million during
the nine months ended September 30, 2022 and 2021, respectively, a decrease of
$1.6 million, or 11%. The decrease was due primarily to a decrease of $2.3
million in personnel-related costs and a decrease of $0.6 million in
professional fees, partially offset by an increase of $0.9 million in facilities
and other administrative costs, an increase of $0.2 million related to our
allowance for doubtful accounts, and a net increase of $0.2 million related to
settlements reached with Biogen and certain contract service vendors. General
and administrative expenses for the nine months ended September 30, 2022 include
approximately $0.4 million of severance and other costs related to our
reduction-in-force.

Gain on Disposal of Assets, Net

Gain on disposal of assets, net was $0.0 million and $57.2 million for the three and nine months ended September 30, 2022, respectively, which primarily consisted of a $57.4 million gain related to the sale of our complement portfolio to Vertex in May 2022.


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Interest and Other Income (Expense), Net

The $0.3 million increase in interest and other income (expense), net for the three months ended September 30, 2022 compared to the three months ended September 30, 2021 was primarily due to an increase in interest income.



The $0.6 million increase in interest and other income (expense), net for the
nine months ended September 30, 2022 compared to the nine months ended September
30, 2021 was primarily due to a $0.2 million gain recognized upon the
extinguishment of a liability and an increase in interest income.

Recent Accounting Pronouncements

Refer to "Accounting Pronouncements Recently Adopted" included in Note 2, Summary of Significant Accounting Policies, in the "Notes to the Condensed Consolidated Financial Statements" in this Form 10-Q.

Liquidity and Capital Resources



On September 20, 2022, we paid a special, one-time cash dividend of $1.43 per
share to holder's of the Company's common stock. The aggregate amount of the
special dividend payment was approximately $45.0 million.

As of September 30, 2022, we had $23.1 million of cash and cash equivalents. For
the nine months ended September 30, 2022, we had $32.2 million in net income and
$31.6 million cash used in operating activities. We have an accumulated deficit
of $370.5 million as of September 30, 2022. Our primary uses of cash are to fund
operating and general and administrative expenditures. Cash used to fund
operating expenses is impacted by the timing of when we pay these expenses, as
reflected in the change in our outstanding accounts payable and accrued
expenses.

We believe that our existing capital resources, including cash and cash
equivalents will be sufficient to meet our projected operating requirements for
at least the next 12 months from the date of this filing. We have based this
estimate on assumptions that may prove to be wrong, and we could utilize our
available capital resources sooner than we currently expect. We plan to continue
to fund losses from operations and capital funding needs through our current
cash balance, as well as potential additional asset sales, licensing
transactions, collaborations or strategic partnerships with other companies. We
intend to make one or more special dividend payments to stockholders in the
future, although there can be no assurance as to the timing or amounts of any
distributions we make. The actual amount of any distributions will depend on
many factors, including, without limitation, costs and expenses for ongoing
operations, directors and officers liability insurance, tax obligations
including those resulting from the sale of assets to Vertex, employee severance
and other activities related to the winding down of Company operations, the
Company's receipt of some or all of the $5.0 million hold-back from the
Company's sale of assets to Vertex, and potential proceeds from the sale,
license or other disposition of any other Company assets.

The following table summarizes our cash flows for the periods presented (in
thousands):

                                                            Nine Months Ended September 30,
                                                              2022                   2021
Cash used in operating activities                       $        (31,621 )     $        (66,079 )
Cash provided by investing activities                             55,375                 45,323
Cash (used in) provided by financing activities                  (45,011 )               49,553

Net (decrease) increase in cash and cash equivalents $ (21,257 )

$ 28,797

Cash Flows from Operating Activities



Cash used in operating activities for the nine months ended September 30, 2022
was $31.6 million. The most significant component of our cash used was a net
loss of $25.0 million, excluding the net gain of $57.2 million from the sale of
our complement portfolio and other assets. The net loss included non-cash
expense related to stock-based compensation of $1.1 million, bad debt expense of
$0.2 million, depreciation and amortization of $0.2 million, and a $0.1 million
loss related to the termination of one of our operating leases. In addition, net
cash outflow of $8.2 million was attributable to the change in our net operating
assets and liabilities primarily as a result of a $6.4 million decrease in
accounts payable, a $4.3 million decrease in accrued compensation and other
accrued liabilities, and a $0.2 million decrease in deferred revenue related to
the Biogen Agreement, partially offset by a $1.6 million decrease in accounts
and other receivables and a $1.0 million decrease in prepaid and other current
assets.

Cash used in operating activities for the nine months ended September 30, 2021
was $66.1 million. The most significant component of our cash used was a net
loss of $67.6 million. This included non-cash expenses related to stock-based
compensation of $2.7 million and depreciation and amortization of $0.2 million.
In addition, cash outflow of $1.4 million was attributable to the change in our
net operating assets and liability primarily as a result of a $2.0 million
increase in prepaid and other assets, a $2.1 million decrease in accounts
payable,

                                       22
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and a $1.1 million decrease in deferred revenue related to the Biogen Agreement, offset by a $2.2 million decrease accounts receivable and a $1.5 million increase in accrued compensation and other accrued liabilities.

Cash Flows from Investing Activities



Cash provided by investing activities for the nine months ended September 30,
2022 was $55.4 million, due primarily to $55.0 million in cash proceeds from the
sale of our complement portfolio to Vertex, $2.5 million due to proceeds from
maturities of investments, and $0.4 million in proceeds from the sale of
property and equipment, partially offset by $2.6 million in transaction costs
related to the sale of our complement portfolio to Vertex.

Cash provided by investing activities for the nine months ended September 30, 2021 was $45.3 million, due to $46.2 million in proceeds from maturities of investments, offset by $0.9 million used in purchases of property and equipment.

Cash Flows from Financing Activities



Cash used in financing activities for the nine months ended September 30, 2022
was due to the special dividend issued and paid, offset by the issuance of stock
grants and option exercises.

Cash provided by financing activities for the nine months ended September 30,
2021 was $49.6 million, due to $49.3 million in net proceeds from the issuance
of common stock related to our public offering in the first quarter of 2021 and
$0.3 million in stock grants and option exercises.

Critical Accounting Polices and Estimates



There have been no significant changes to our critical accounting policies since
December 31, 2021. For a description of critical accounting policies that affect
our significant judgments and estimates used in the preparation of our unaudited
condensed consolidated financial statements, refer to Item 7 "Management's
Discussion and Analysis of Financial Condition and Results of Operations"
contained in our Annual Report on Form 10-K.
ITEM 3. Quantitative and Qualitative Disclosures About Market Risk


Not applicable.


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