The following discussion and analysis should be read together with our consolidated financial statements and the related notes thereto included elsewhere in this Annual Report. This discussion and other parts of this report contain forward-looking statements reflecting our current expectations that involve risks and uncertainties, such as our plans, objectives, expectations, intentions, and beliefs. See "Forward-Looking Statements" for a discussion of the uncertainties, risks, and assumptions associated with these statements. Actual results and the timing of events could differ materially from those discussed in these forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those identified below and those discussed in the section entitled "Risk Factors" included elsewhere in this Annual Report.

Overview

We are a biopharmaceutical company focused on discovering and developing potential best-in-class medicines for serious and rare diseases. We target under-competitive disease areas where marketed therapies often leave room for improvements in efficacy, safety, and/or dosing convenience. We believe that first-generation medicines rarely represent optimal solutions, especially in rare disease areas, and that there is potential to develop differentiated, best-in-class medicines that could lead to improved patient outcomes, reduced side effects, improved quality of life, expanded market access, and augmented market competition. Our business model is designed to identify and evaluate product opportunities in disease areas where trial data establishes proof-of-concept for a drug target in the clinic, but the competitive evolution of the product life cycle management and number of entrants appears incomplete. We intend to prioritize indications where a fast-follower and a potentially differentiated drug candidate, or overall product profile, could create significant medical benefit for patients. We are engineering medicines to address unmet medical needs for patients and further advance drug innovation.

We are developing three product candidates, VRDN-001, VRDN-002 and VRDN-003, that are being developed for intravenous or subcutaneous administration to treat patients who suffer from thyroid eye disease ("TED"). Our most advanced program, VRDN-001, is a differentiated humanized monoclonal antibody targeting IGF-1R intravenously administered for the treatment of TED.



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Global Economic Considerations

The global macroeconomic environment is uncertain, and could be negatively affected by, among other things, increased U.S. trade tariffs and trade disputes with other countries, instability in the global capital and credit markets, supply chain weaknesses, and instability in the geopolitical environment, including as a result of the Russian invasion of Ukraine, the rising tensions between China and Taiwan and other political tensions, and lingering effects of the COVID-19 pandemic. Such challenges have caused, and may continue to cause, recession fears, concerns regarding potential sanctions, rising interest rates, foreign exchange volatility and inflationary pressures. At this time, we are unable to quantify the potential effects of this economic instability on our future operations.



Financial Operations Overview

Revenue

Our revenue has historically consisted primarily of up-front payments for licenses, milestone payments, and payments for other research and development services earned under license and collaboration agreements as well as for amounts earned under certain grants we have been awarded.

In October 2020, we became party to a license agreement with Zenas BioPharma. Since February 2021, we have entered into several letter agreements with Zenas BioPharma in which we agreed to provide assistance to Zenas BioPharma with certain development activities, including manufacturing (collectively with the license agreement, the "Zenas Agreements"). Under the terms of the Zenas Agreements, we granted Zenas BioPharma an exclusive license to develop, manufacture, and commercialize certain IGF-1R directed antibody products for non-oncology indications in the greater area of China in exchange for upfront non-cash consideration and non-refundable milestone payments upon achieving specific milestone events during the contract term. Zenas BioPharma announced that it had obtained IND approval in China in July 2022. Under the license agreement, we received a $1.0 million milestone payment from Zenas BioPharma. Additionally, we are eligible to receive royalty payments based on a percentage of the annual net sales of any licensed products sold on a country-by-country basis in the greater area of China. The royalty percentage may vary based on different tiers of annual net sales of the licensed products made. Zenas BioPharma is obligated to make royalty payments to us for the royalty term in the Zenas Agreements. In May 2022, we entered into a Manufacturing Development and Supply Agreement with Zenas BioPharma to manufacture and supply, or have manufactured and supplied, clinical drug product for development purposes.

In the future, we expect to continue to generate revenue from a combination of license fees and other up-front payments, payments for research and development services, milestone payments, product sales, and royalties in connection with strategic alliances. We expect that any revenue we generate could fluctuate from quarter to quarter as a result of the timing of our achievement of development and commercial milestones, the timing and amount of payments relating to such milestones, and the extent to which any of our product candidates are approved and successfully commercialized by us or our strategic alliance collaborators, if any. If we or our strategic alliance collaborators, if any, fail to develop product candidates in a timely manner or to obtain regulatory approval for them, then our ability to generate future revenue, and our results of operations and financial position would be adversely affected.

Research and Development Expenses

Research and development expenses consist of costs incurred for the research and development of our therapeutic programs and product candidates, which include:

•employee-related expenses, including salaries, severance, retention, benefits, insurance, and share-based compensation expense;

•expenses incurred under agreements with clinical research organizations ("CROs"), investigative sites that conduct our clinical trials, and other clinical trial-related vendors, and consultants;

•the costs of acquiring, developing, and manufacturing and testing clinical and preclinical materials, including costs incurred under agreements with contract manufacturing organizations ("CMOs");

•costs associated with non-clinical activities and regulatory operations;



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•license fees and milestone payments related to the acquisition and retention of certain licensed technology and intellectual property rights; and

•facilities, depreciation, market research, and other expenses, which include allocated expenses for rent and maintenance of facilities, depreciation of leasehold improvements and equipment, and laboratory supplies.

We make non-refundable advance payments for goods and services that will be used in future research and development activities. These payments are recorded as expense in the period in which we receive or take ownership of the goods or when the services are performed.

We record up-front and milestone payments to acquire and retain contractual rights to in-licensed technology and intellectual property rights as research and development expenses when incurred if there is uncertainty in our receiving future economic benefit from the acquired contractual rights. We consider future economic benefits from acquired contractual rights to licensed technology to be uncertain until such a drug candidate is approved by the U.S. Food and Drug Administration ("FDA") or when other significant risk factors are abated.

We expect that our research and development expenses will increase as we expand our clinical development programs and initiate new clinical trials. The process of conducting clinical trials and preclinical studies necessary to obtain regulatory approval is costly and time consuming. We, or our strategic alliance collaborators, if any, may never succeed in achieving marketing approval for any of our product candidates. The probability of success for each product candidate may be affected by numerous factors, including clinical data, preclinical data, competition, manufacturability, and commercial viability of our product candidates.

Successful development of future product candidates is highly uncertain and may not result in approved products. Completion dates and completion costs can vary significantly for each future product candidate and are difficult to predict. We anticipate we will make determinations as to which programs to pursue and how much funding to direct to each program on an ongoing basis in response to our ability to maintain or enter into new strategic alliances with respect to each program or potential product candidate, the scientific and clinical success of each future product candidate, and ongoing assessments as to each future product candidate's commercial potential. For example, upon receipt of topline data from our planned proof of concept trial of VRDN-002 by the end of 2023, we expect to determine which of VRDN-002 or VRDN-003 to advance into a pivotal Phase 3 trial in the first half of 2024. We will need to raise additional capital and may seek additional strategic alliances in the future in order to advance the various clinical trials that are part of our clinical development program described above.

General and Administrative Expenses

General and administrative expenses consist primarily of salaries and related benefits, including share-based compensation, and severance and retention benefits related to our finance, accounting, human resources, legal, business development, and other support functions, professional fees for auditing, tax, and legal services, as well as insurance, board of director compensation, consulting, and other administrative expenses.

Other Income, net

Other income, net consists primarily of interest income, net of fees, and various income items of a non-recurring nature. Interest expense consists of cash and non-cash interest expense on our long-term debt. We earn interest income from interest-bearing accounts, money market funds, and short-term investments.

Critical Accounting Policies and Estimates

This discussion and analysis of financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP"). The preparation of financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, and expenses. On an ongoing basis, we evaluate these estimates and judgments. We base our estimates on historical experience and on various assumptions that we believe to be reasonable under the circumstances. These estimates and assumptions form the basis for making judgments about the carrying values of assets and liabilities and the recording of expenses that are not readily apparent from other sources. Actual results may differ materially from these estimates. We believe that the accounting policy discussed below is critical to understanding our historical and future performance, as this policy relates to the more significant areas involving our judgments and estimates.



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Clinical Trial and Preclinical Study Accruals

We make estimates of our accrued expenses as of each balance sheet date in our consolidated financial statements based on certain facts and circumstances at that time. Our accrued expenses for preclinical studies and clinical trials are based on estimates of costs incurred for services provided by external service providers and for other trial-related activities. The timing and amount of expenses we incur through our external service providers depend on a number of factors, such as site initiation, patient screening, enrollment, delivery of reports, and other events. In accruing for these activities, we obtain information from various sources and estimate the level of effort or expense allocated to each period. Adjustments to our research and development expenses may be necessary in future periods as our estimates change.

Results of Operations

Comparison of the Years Ended December 31, 2022 and 2021



                                              Year Ended
                                             December 31,
                                          2022           2021
                                            (in thousands)            Increase (Decrease)
Revenue                               $    1,772      $   2,963      $             (1,191)
Research and development expenses        100,894         56,886                    44,008
General and administrative expenses       35,182         25,805                     9,377

Other income (expense), net                4,430            315                     4,115
Net loss                              $ (129,874)     $ (79,413)     $            (50,461)



Revenue

Revenue was $1.8 million for the year ended December 31, 2022, as compared to $3.0 million for the year ended December 31, 2021. Revenue for both periods was attributable to our collaboration agreement with Zenas BioPharma. The $1.2 million decrease in revenue is due to the timing of activities performed under the collaboration agreement. During the year ended December 31, 2022, the Company recognized $1.0 million upon Zenas BioPharma's achievement of a certain development milestone.

Research and Development Expenses

Research and development expenses were $100.9 million during the year ended December 31, 2022, compared to $56.9 million during the year ended December 31, 2021. The $44.0 million increase in research and development expenses is primarily attributable to an increase of $8.9 million in clinical trial expenses related to our lead product candidates, VRDN-001 and VRDN-002; an increase of $8.7 million in costs associated with our preclinical programs; an increase of $7.8 million in personnel related costs, including share-based compensation, due to an increase in headcount; an increase of $7.6 million in milestone, license and option fees due to milestone and upfront payments to ImmunoGen and Paragon Therapeutics, Inc.; an increase of $6.5 million in chemistry, manufacturing and controls costs; and an increase of $2.4 million in consulting expenses.

We expect our research and development expenses to increase as we work to progress our clinical and preclinical programs.

General and Administrative Expenses

General and administrative expenses were $35.2 million during the year ended December 31, 2022, compared to $25.8 million during the year ended December 31, 2021. The $9.4 million increase in general and administrative expenses is due primarily to an increase of $6.0 million in personnel costs, including share based compensation, due to an increase in headcount, as well as an increase of $3.1 million in consulting, professional and license fees.

Other Income, net

Other income, net was $4.4 million during the year ended December 31, 2022 compared to $0.3 million during the year ended December 31, 2021. Other income, net for the year ended December 31, 2022, is comprised of $4.9 million of interest income earned on short-term investments as well as sub-lease income, offset by $0.5 million in interest expense related to our Hercules



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Loan and Security Agreement. Other income, net for the year ended December 31, 2021, is comprised of interest income earned on short-term investments as well as sub-lease income.

Liquidity and Capital Resources

We have funded our operations to date principally through proceeds received from the sale of our common stock, our Series A Preferred Stock, our Series B Preferred Stock and other equity securities, debt financings, license fees, and reimbursements received under collaboration agreements. As of December 31, 2022, we had $424.6 million in cash, cash equivalents, and short-term investments. We expect that our current resources will enable us to fund our planned operations into the second half of 2025.

We have no products approved for commercial sale and have not generated any revenue from product sales. Since our inception and through December 31, 2022, we have generated an accumulated deficit of $488.2 million. Substantially all of our operating losses resulted from expenses incurred in connection with our research and development programs and from general and administrative costs associated with our operations.

We will continue to require substantial additional capital to continue the development of our product candidates, and potential commercialization activities, and to fund our ongoing operations, including our clinical development plan described above. The amount and timing of future funding requirements will depend on many factors, including the pace and results of our clinical development efforts, equity financings, securing additional license and collaboration agreements, and issuing debt or other financing vehicles. Our ability to secure capital is dependent upon a number of factors, including success in developing our technology and product candidates. Failure to raise capital as and when needed, on favorable terms or at all, would have a negative impact on our financial condition and our ability to develop our product candidates. Changing circumstances, such as changes in the scope and timing of our clinical studies, may cause us to consume capital significantly faster or slower than we currently anticipate. If we are unable to acquire additional capital or resources, we will be required to modify our operational plans to complete future milestones. We have based these estimates on assumptions that may prove to be wrong, and we could exhaust our available financial resources sooner than we currently anticipate. We may be forced to reduce our operating expenses and raise additional funds to meet our working capital needs, principally through the additional sales of our securities or debt financings or entering into strategic collaborations.

Our material cash requirements include obligations as of December 31, 2022, as well as resources required to fulfill our research and development activities and the effects that such obligations and activities are expected to have on our liquidity and cash flows in future periods. We expect that our operating losses will fluctuate significantly from quarter to quarter and year to year due to timing of our development activities and efforts to achieve regulatory approval.

If we raise additional funds through the issuance of debt, the obligations related to such debt could be senior to rights of holders of our capital stock and could contain covenants that may restrict our operations. Should additional capital not be available to us in the near term, or not be available on acceptable terms, we may be unable to realize value from our assets and discharge our liabilities in the normal course of business, which may, among other alternatives, cause us to further delay, substantially reduce, or discontinue operational activities to conserve our cash resources.

Loan and Security Agreement with Hercules Capital, Inc.

On April 1, 2022, we entered into a loan and security agreement (the "Hercules Loan and Security Agreement") among the Company, certain of our subsidiaries from time to time party thereto (together with the Company, collectively, the "Borrower"), Hercules Capital, Inc. ("Hercules") and certain other lenders party thereto (the "Lenders"). Under the Hercules Loan and Security Agreement, the Lenders provided us with access to a term loan with an aggregate principal amount of up to $75.0 million, in four tranches (collectively the "Term Loan"), consisting of: (1) an initial tranche of $25.0 million, available through June 15, 2023; (2) a second tranche of $10.0 million, subject to the achievement of certain regulatory milestones, available through June 15, 2023; (3) a third tranche of $15.0 million, subject to the achievement of certain regulatory milestones, available through March 15, 2024; and (4) a fourth tranche of $25.0 million, subject to approval by the Lenders' investment committee(s), available through December 15, 2024. The first tranche of $25.0 million will be available to us through June 15, 2023. Upon signing we drew an initial principal amount of $5.0 million.

The Term Loan bears interest at a floating per annum rate equal to the greater of (1) 7.45% and (2) 4.2% above the Prime Rate, provided that the Term Loan interest rate shall not exceed a per annum rate of 8.95%. Interest is payable monthly in arrears on the first day of each month. Per the terms of the Hercules Loan and Security Agreement, we were originally obligated to make interest-only payments through April 1, 2024. However, upon the achievement of a development milestone the interest-only


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period was extended to October 1, 2024. If additional development milestones are met, the interest-only period will be extended to April 1, 2025 pursuant to a second extension. We are required to repay the Term Loan amount in equal monthly installments of the principal amount and interest between the end of the interest-only period and the maturity date of October 1, 2026. In addition, we are required to pay an end-of-term fee equal to 6% of the principal amount of funded Term Loan Advances at maturity, which are being accreted as additional interest expense over the term of the loan.

ATM Agreements

In September 2022, we entered into an Open Market Sale AgreementSM (the "September 2022 ATM Agreement") with Jefferies, LLC ("Jeffries") pursuant to which we may offer and sell shares of our common stock having an aggregate offering price of up to $175.0 million from time to time at prices and on terms to be determined by market conditions at the time of offering, with Jefferies acting as the sales agent. Jefferies will receive a commission of 3.0% of the gross proceeds of any shares of common stock sold under the September 2022 ATM Agreement. As of December 31, 2022, 964,357 shares were sold under the September 2022 ATM Agreement at a weighted average price of $26.01 per share, for aggregate net proceeds of approximately $24.2 million, including commissions to Jefferies as a sales agent.

In November 2021, we entered into an Open Market Sale AgreementSM (the "November 2021 ATM Agreement") with Jefferies, pursuant to which we could offer and sell shares of our common stock having an aggregate offering price of up to $75.0 million from time to time at prices and on terms to be determined by market conditions at the time of offering, with Jefferies acting as sales agent. The November 2021 ATM Agreement was terminated in connection with the September 2022 ATM Agreement. No shares were sold under the November 2021 ATM Agreement prior to its termination.

In April 2021, we entered into an Open Market Sale AgreementSM (the "April 2021 ATM Agreement") with Jefferies pursuant to which we could offer and sell shares of our common stock having an aggregate offering price of up to $50.0 million at prices and on terms to be determined by market conditions at the time of offering, with Jefferies acting as sales agent. Jefferies received a commission equal to 3.0% of the gross sales proceeds of any common stock sold through Jefferies under the April 2021 ATM Agreement. The April 2021 ATM Agreement was terminated in connection with the November 2021 ATM Agreement. An aggregate of 2,551,269 shares of common stock were sold pursuant to the April 2021 ATM Agreement prior to its termination, at a volume weighted-average price of $13.13 per share, for aggregate net proceeds of approximately $32.4 million, including commissions to Jefferies as sales agent.

Underwritten Public Offerings

In August 2022, we entered into an underwriting agreement (the "2022 Underwriting Agreement") with Jefferies, SVB Securities LLC and Evercore Group LLC relating to the offer and sale (the "2022 Offering") of 11,352,640 shares of our common stock, which includes 1,725,000 shares of common stock issued in connection with the exercise in full by the underwriters of their option to purchase additional shares at a public offering price of $23.50 per share, and 28,084 shares of the Company's Series B Non-Voting Convertible Preferred Stock, at a public offering price of $1,566.745 per share (collectively, the "2022 Public Offering"). The aggregate gross proceeds to us from the 2022 Public Offering, including the exercise of the option, were approximately $311.0 million, before deducting underwriting discounts and commissions and other offering expenses payable by us.

In September 2021, we entered into an underwriting agreement (the "2021 Underwriting Agreement") with Jeffries, SVB Leerink LLC and Evercore Group, LLC for the sale and issuance of 7,344,543 shares of common stock, which include 1,159,089 shares of common stock issued in connection with the exercise in full by the underwriters of their option to purchase additional shares at a public offering price of $11.00 per share, and 23,126 shares of Series B Non-Voting Convertible Preferred Stock at a public offering price of $733.37 per share (the "2021 Public Offering"). Our aggregate gross proceeds from the 2021 Public Offering, including the exercise of the option, were approximately $97.7 million, before deducting underwriting discounts and commissions and estimated offering expenses payable by us.

Purchase Agreements

In October 2020, we entered into a securities purchase agreement (the "Purchase Agreement") with the purchasers named therein (the "Investors"). Pursuant to the Purchase Agreement, we agreed to sell an aggregate of approximately 195,290 shares of Series A Preferred Stock for an aggregate purchase price of approximately $91.0 million. Each share of Series A Preferred Stock is convertible into 66.67 shares of our common stock, subject to specified conditions. The powers, preferences, rights, qualifications, limitations, and restrictions applicable to the Series A Preferred Stock are set forth in the applicable certificate of designations. During the year ended December 31, 2021, 138,050 shares of Series A Preferred Stock were converted into 9,203,732 shares of common stock.


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In December 2019, we entered into a common stock purchase agreement (the "Aspire Stock Purchase Agreement") with Aspire Capital Fund, LLC ("Aspire Capital"), which provides that, subject to the terms, conditions, and limitations set forth therein, Aspire Capital is committed to purchase up to an aggregate of $20.0 million of shares of our common stock over the 30-month term of the Aspire Stock Purchase Agreement. Upon execution of the Aspire Stock Purchase Agreement, we sold to Aspire Capital 106,564 shares of common stock at $9.38 per share for proceeds of $1.0 million as the Initial Purchase Shares (as defined in the Aspire Stock Purchase Agreement). During the year ended December 31, 2020, we sold to Aspire Capital 412,187 shares of our common stock at a weighted-average price of $21.35 per share for aggregate net proceeds of $8.8 million. As of December 31, 2022, we have the ability to sell an additional $10.2 million of shares of our common stock to Aspire Capital.



Summarized cash flows for the year ended December 31, 2022 and 2021 are as
follows:

                                            Year Ended
                                           December 31,
                                       2022           2021
                                          (in thousands)
Net cash provided by (used in):
Operating activities                $ (93,838)     $ (54,581)
Investing activities                 (115,126)       (74,292)
Financing activities                  322,244        125,275
Total                               $ 113,280      $  (3,598)



Operating Activities

Net cash used in operating activities was $93.8 million for the year ended December 31, 2022, and primarily consisted of a net loss of $129.9 million, adjusted for non-cash items of $20.1 million (primarily share-based compensation of $19.8 million) and working capital adjustments of $16.0 million.

Net cash used in operating activities was $54.6 million for the year ended December 31, 2021, and primarily consisted of a net loss of $79.4 million, adjusted for non-cash items of $23.1 million (primarily share-based compensation of $14.5 million and a $7.5 million non-cash charge related to the issuance of common stock as payment for licensing fees to Xencor, Inc.) and working capital adjustments of $1.7 million.

Investing Activities

Net cash used in investing activities was $115.1 million during the year ended December 31, 2022. Net cash used in investing activities in 2022 primarily consisted of net purchases of investments of $114.3 million and property and equipment purchases of $0.8 million.

Net cash used in investing activities was $74.3 million during the year ended December 31, 2021. Net cash used in investing activities in 2021 primarily consisted of net purchases of investments of $74.0 million and property and equipment purchases of $0.3 million.



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Financing Activities

Net cash provided by financing activities was $322.2 million for the year ended December 31, 2022. Net cash provided by financing activities in 2022 was primarily driven by net proceeds of $313.8 million in net proceeds from the 2022 Public Offering and the September 2022 ATM Agreement, $4.6 million in net proceeds from the Hercules Loan and Security Agreement, as well as $2.8 million in proceeds from the exercise of stock options, $0.9 million in proceeds from the exercise of warrants and $0.2 million in proceeds from the issuance of common stock under our employee stock purchase plan.

Net cash provided by financing activities was $125.3 million for the year ended December 31, 2021. Net cash provided by financing activities in 2021 was primarily driven by net proceeds of $107.3 million from the sale of common stock in 2021 through the 2021 Public Offering and the April 2021 ATM Agreement, $15.7 million in net proceeds from the sale of our Series B Preferred Stock, $1.3 million from the exercise of common stock warrants, and $1.0 million in proceeds from employee stock option exercises.

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