You should read the following discussion and analysis of our financial condition and results of operations in conjunction with our financial statements and the related notes included elsewhere in this Annual Report on Form 10-K.

In addition to historical financial information, the following discussion contains forward-looking statements that reflect our plans, estimates, beliefs and expectations, and involve risks and uncertainties. Factors that could cause or contribute to these differences include those discussed below and elsewhere in this Annual Report on Form 10-K, particularly in the sections titled "Special Note Regarding Forward-Looking Statements" and "Risk Factors."

Overview

We are a late clinical-stage biotechnology company focused on developing and commercializing transformative treatments for patients with serious immunological diseases. Our lead product candidate, atacicept, is a self-administered fusion protein that blocks both BLyS and APRIL with best-in-class potential for the treatment of IgAN. The Phase 2b ORIGIN trial evaluating the safety and efficacy of atacicept in patients with IgAN completed enrollment in mid-2022 and reported positive 24-week topline results in January 2023. Atacicept met its primary endpoint at 24 weeks, achieved statistical significance in the 150 mg dose group, and showed a trend towards deeper reductions in proteinuria with available data at 36 weeks, for which full results will read out in the second quarter of 2023. Additionally, atacicept's safety profile was comparable to placebo. The trial will remain blinded through 36 weeks, after which all patients will roll onto the open label portion of the study and receive atacicept 150 mg through 96 weeks. We plan to advance atacicept 150 mg in a pivotal Phase 3 clinical trial in IgAN in the second quarter of 2023. We also are planning a Phase 3 clinical trial of atacicept in LN) a severe renal manifestation of SLE, based on feedback from the FDA's review of clinical results in a Phase 2 clinical trial of atacicept in SLE patients with HDA. We continue to advance the development of MAU868, a potentially first-in-class monoclonal antibody to treat reactivated BKV infections. MAU868 is a clinical-stage neutralizing monoclonal antibody that is directed against BKV, a polyoma virus that can have devastating consequences in certain settings such as kidney transplant and HSCT. In final results from the Phase 2 clinical trial of MAU868 versus placebo in BK viremia among kidney transplant recipients, MAU868 was shown to be well tolerated and demonstrated a clinically meaningful BKV antiviral activity through 36 weeks. Pending discussions with the FDA, we plan to initiate a Phase 2b or Phase 3 clinical trial. We believe that our current pipeline programs leverage the deep expertise of the Vera Therapeutics team and have strong commercial synergies. We hold global developmental and commercial rights to all of our pipeline molecules.

In January 2023, we announced our plan to prioritize and focus our current resources on the advancement of atacicept in IgAN into a pivotal Phase 3 trial. As a result, we are delaying enrollment in the pivotal Phase 3 trial for LN and commitment of resources to the MAU868 program.

Since our inception, we have devoted substantially all of our resources to our research and development efforts, pre-clinical studies and clinical trials, establishing and maintaining our intellectual property portfolio, hiring personnel, raising capital, and providing general and administrative support for these operations.

We do not have any product candidates approved for commercial sale, and we have not generated any revenue from product sales. Our ability to generate revenue sufficient to achieve profitability, if ever, will depend on the successful development and eventual commercialization of one or more of our product candidates, which we expect will take a number of years, if ever. We also do not own or operate, and currently have no plans to establish, any manufacturing facilities. We rely, and expect to continue to rely, on third parties for the manufacture of our product candidates for nonclinical and clinical testing, as well as for commercial manufacturing if any of our product candidates obtain marketing approval. We believe that this strategy allows us to maintain a more efficient infrastructure by eliminating the need for us to invest in our own manufacturing facilities, equipment, and personnel while also enabling us to focus our expertise and resources on the development of our product candidates.

To date, we have funded our operations primarily through proceeds from the sale of shares of our Class A common stock, redeemable convertible preferred stock, debt financing and convertible promissory notes. As of December 31, 2022, we had $114.7 million in cash, cash equivalents and marketable securities.

On May 18, 2021, we completed our IPO. In connection with our IPO, we issued and sold 5,002,500 shares of Class A common stock, including 652,500 shares associated with the full exercise of the underwriters' option to purchase additional shares, at a price to the public of $11.00 per share, resulting in net proceeds to us of approximately $48.4 million, after deducting underwriting discounts and commissions and offering related expenses payable by us. Upon the closing of our IPO, all outstanding shares of our redeemable convertible preferred stock converted into 15,464,776 shares of our Class A common stock and 309,238 shares of our Class B common stock. In 2022, all shares of Class B common stock were converted into shares of Class A common stock.

In December 2021, we entered into the Amplyx Agreement, pursuant to which we paid $5.0 million to Amplyx to purchase assets relating to MAU868. In September 2022, we entered into an amendment to the Novartis License to modify the terms of potential



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development milestone payments. Pursuant to this amendment, we issued 283,034 shares of Class A common stock to Novartis in exchange for a reduction of $7.0 million in contingent future development milestones, including the $2.0 million contingent milestone obligation we accrued in December 2021. The value of the shares issued was $5.7 million based on the closing market value of our Class A common stock as of the effective date of the amendment, and as a result of the amendment we recognized $3.7 million of research and development expense.

In December 2021, we entered into the Loan Agreement with Oxford, which was amended in November 2022, pursuant to which we may borrow up to an aggregate maximum principal amount of $50.0 million, of which $5.0 million was funded on December 17, 2021, and $20.0 million was funded on November 4, 2022, and the balance of which is available to be drawn between January 3, 2022, and December 29, 2023. See "-Loan and security agreement" below.

In February 2022, we completed a follow-on public offering and issued 5,742,026 shares of Class A common stock for net proceeds of approximately $80.0 million, after deducting underwriting discounts and commissions and offering related expenses.

In February 2023, we completed a follow-on public offering and issued 16,428,572 shares of Class A common stock for net proceeds of approximately $107.6 million, after deducting underwriting discounts and commissions and offering related expenses.

We have incurred significant operating losses since the commencement of our operations. Our net losses were $89.1 million and $32.6 million for the years ended December 31, 2022 and 2021, respectively, and we expect to incur significant and increasing losses for the foreseeable future as we continue to advance our product candidates, atacicept and MAU868, to commercialization. Our net losses may fluctuate significantly from period to period, depending on the timing of expenditures on our research and development activities. As of December 31, 2022, we had an accumulated deficit of $213.1 million. Our primary use of cash is to fund operating expenses, which consist of research and development expenditures and general and administrative expenditures. Cash used to fund operating expenses depends on the timing of when we pay these expenses, as reflected in the changes in our working capital balances.

We expect to continue to incur net operating losses for at least the next several years, and we expect our research and development expenses, general and administrative expenses, and capital expenditures will continue to increase. We expect our expenses and capital requirements will increase significantly in connection with our ongoing near- and long-term activities as we:

continue our ongoing and planned development of our product candidates, atacicept for the treatment of IgAN and LN, and MAU868 for the treatment of BK viremia;

conduct clinical trials and nonclinical studies for atacicept and MAU868;

seek regulatory approvals for any product candidates that successfully complete clinical trials;

continue to scale up external manufacturing capacity with the aim of securing sufficient quantities to meet our capacity requirements for clinical trials and potential commercialization;

establish a sales, marketing and distribution infrastructure to commercialize any approved product candidates and related additional commercial manufacturing costs;

develop, maintain, expand, protect and enforce our intellectual property portfolio, including patents, trade secrets and know-how;

attract, develop and retain additional clinical, scientific, quality control, manufacturing management and administrative personnel;

add clinical, operational, financial and management information systems and personnel, including personnel to support our product development and planned future commercialization efforts; and

incur additional legal, accounting, investor relations and other expenses associated with operating as a public company.

We also expect to increase the size of our administrative function to support the growth of our business. Our net losses may fluctuate significantly from quarter-to-quarter and year-to-year, depending on the timing of our clinical trials and our expenditures on other research and development activities.

We will require substantial additional funding to develop our product candidates and support our continuing operations. Until such time that we can generate significant revenue from product sales or other sources, if ever, we expect to finance our operations through the sale of equity, debt financings, or other capital sources, which could include income from collaborations, strategic partnerships, or marketing, distribution, licensing or other strategic arrangements with third parties, or from grants. We may be unable to raise additional funds or to enter into such agreements or arrangements on favorable terms, or at all. Our ability to raise additional funds may be adversely impacted by potential worsening global economic conditions and the disruptions to, and volatility in, the credit and financial markets in the United States and worldwide. Our failure to obtain sufficient funds on acceptable terms when needed could have a



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material adverse effect on our business, results of operations or financial condition, including requiring us to have to delay, reduce or eliminate our product development or future commercialization efforts. Insufficient liquidity may also require us to relinquish rights to product candidates at an earlier stage of development or on less favorable terms than we would otherwise choose. The amount and timing of our future funding requirements will depend on many factors, including the pace and results of our development efforts. We cannot provide assurance that we will ever be profitable or generate positive cash flow from operating activities.

Geopolitical and Macroeconomic Developments

The coronavirus (including its variants, COVID-19) pandemic has had a significant economic impact across the global marketplace presenting challenges to maintaining business continuity and dramatically changing the ways in which we live and interact with others. While vaccines have become widely available in certain countries, and businesses and economies have reopened, the status of global economic recovery remains uncertain and unpredictable, and will continue to be impacted by developments in the pandemic including any subsequent waves of outbreak or new variant strains of COVID-19 which may require re-closures or other preventative measures. As public health directives surrounding the pandemic have relaxed, our office has reopened and we are permitting travel and in-person events, taking into consideration government restrictions, employee safety, and health risks. Our approach may vary among geographies depending on appropriate health protocols, and may change at any time. Additionally, our efforts to reopen our office safely may not be successful, could expose our employees to health risks, and could involve additional costs or liability.

Due to the ongoing military conflict between Ukraine and Russia, the U.S. and global financial markets experienced volatility, which has led to disruptions to trade, commerce, pricing stability, credit availability and supply chain continuity globally. In connection with the military conflict, the United States, United Kingdom and European Union (EU), along with others, imposed significant new sanctions and export controls against Russia, Russian banks and certain Russian individuals and may implement additional sanctions or take further punitive actions in the future. The full economic and social impact of the sanctions imposed on Russia (as well as possible future punitive measures that may be implemented), as well as the counter-measures imposed by Russia, in addition to the ongoing military conflict between Ukraine and Russia and related sanctions, which could conceivably expand into the surrounding region, remains uncertain; however, both the conflict and related sanctions have resulted and could continue to result in disruptions to trade, commerce, pricing stability, credit availability and supply chain continuity in both Europe and globally, and has introduced significant uncertainty into global markets. As a result, our business and results of operations may be adversely affected by the ongoing military conflict between Ukraine and Russia and related sanctions, particularly to the extent it escalates to involve additional countries, further economic sanctions or wider military conflict.

Although we did not see a significant financial impact to our business operations as a result of recent geopolitical and macroeconomic developments, such as the COVID-19 pandemic and the ongoing Ukraine-Russia conflict for the year ended December 31, 2022, there may be potential impacts to our business in the future that are highly uncertain and difficult to predict such as disruptions or restrictions in our supply chain, disruption or restrictions on our employees' ability to travel, disruptions to or delays in ongoing non-clinical trials, clinical trials, third-party manufacturing supply and other operations, the potential diversion of healthcare resources away from the conduct of clinical trials to focus on pandemic or adverse geopolitical and macroeconomic concerns, interruptions or delays in the operations of the FDA or other regulatory authorities, continued increases in inflation and interest rates, changes in availability and cost of credit and our ability to raise capital and conduct business development activities. The ultimate impact of these geopolitical and macroeconomic developments, as well as any lasting effects on our revenue and the way we conduct our business, is highly uncertain and subject to continued change, and we recognize that they may continue to present unique challenges for us.

We continue to believe that our existing cash and cash equivalents will be sufficient to fund our operating expenses and capital expenditure requirements for at least the next 12 months from the issuance date of the financial statements included in this Annual Report. However, should adverse geopolitical and macroeconomic events, such as the COVID-19 pandemic, the ongoing Ukraine-Russia conflict and related sanctions, and any associated recession or depression continue for a prolonged period, our results of operations, financial condition, liquidity and cash flows could be materially impacted as a result of a lower likelihood of effectively and efficiently developing and successfully commercializing our product candidates.

Results of operations

Comparison of the years ended December 31, 2022 and 2021

The following table summarizes our results of operations for the years ended December 31, 2022 and 2021.




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                                           Year Ended
                                          December 31,                       CHANGE
(dollars in thousands)                2022            2021           AMOUNT             %
Operating expenses:
Research and development           $    68,993     $    22,484     $    46,509             207 %
General and administrative              21,910          11,918           9,992              84 %
Total operating expenses                90,903          34,402          56,501             164 %
Loss from operations                   (90,903 )       (34,402 )       (56,501 )           164 %
Other income (expense):
Interest income                          1,750              15           1,735               *
Interest expense                          (992 )           (20 )          (972 )             *
Other income                             1,899               -           1,899               *
Change in fair value of
non-marketable equity securities          (809 )          (892 )            83               *
Gain on sale of PNAi technology              -           2,691          (2,691 )             *
Total other income, net                  1,848           1,794              54               3 %
Loss before provision of income
taxes                              $   (89,055 )   $   (32,608 )   $   (56,447 )           173 %



* Not meaningful

Research and development expenses

Research and development expenses represent a substantial portion of our operating expenses. Our research and development expenses consist primarily of direct and indirect expenses incurred in connection with the research and development of our product candidates. Direct expenses include costs incurred under agreements with third parties, including contract research organizations, contract drug manufacturing organizations and consultants directly related to our research and development of product candidates, laboratory supplies and costs of lab studies, and license and milestone fees incurred as a result of our contractual obligations for our development candidates. Indirect expenses include employee compensation and other personnel-related expenses, including stock-based compensation, facilities and depreciation related to buildings and equipment used for research and development personnel and activities and other expenses. From October 2020 until December 2021, we have been engaged in the development of atacicept as our sole product candidate. In December 2021, we entered into the Amplyx Agreement and acquired our second product candidate, MAU868.

Research and development expenses are recorded as expense in the period in which the related activities occurred, and payments we make prior to the receipt of goods or services to be used in research and development efforts are deferred as prepaid expenses until the goods or services are received and used. We accrue expenses for contract research and development as the related services are performed by monitoring the status of specified activities and billings received from our external service providers. These expenses are accrued based on estimates and are adjusted as actual expenses become known. The cost incurred in obtaining technology licenses, including initial and subsequent milestone payments incurred under our licensing agreements, are recorded as expense in the period in which they are incurred, as the licensed technology, method or process has no alternative future uses other than for our research and development activities. Where contingent milestone payments are due to third parties under license or other agreements, the milestone payment obligations are recognized as expense when achievement of the contingent milestone is probable, which is generally upon achievement of the milestone.

The following table summarizes our research and development expenses incurred during the respective periods.



                                                  Year Ended
                                                 December 31,                CHANGE
(dollars in thousands)                         2022         2021        AMOUNT        %
Direct research and development expenses
Contract drug manufacturing                  $ 27,587     $  2,236     $ 25,351       1134 %
Clinical trial expenses                        20,534        6,754       13,780        204 %
Consulting and professional services            5,431        2,508        2,923        117 %
License and milestone obligations               3,661        7,000       (3,339 )      (48 )%
Indirect research and development expenses
Compensation and related benefits              10,987        3,870        7,117        184 %
Facilities and other                              793          116          677        584 %
Research and development expenses            $ 68,993     $ 22,484     $ 46,509        207 %


Research and development expenses increased by $46.5 million, or 207%, to $69.0 million in the year ended December 31, 2022, from $22.5 million in the year ended December 31, 2021. The increase was primarily due to progressing clinical development of



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atacicept in IgAN and LN, including expenses incurred in manufacturing drug supply for clinical trials. Contract drug manufacturing increased by $25.4 million primarily due to production of atacicept drug supply for clinical trials. Clinical trial expenses increased by $13.8 million primarily due to startup of the COMPASS trial, as well as increased expenses for the ORIGIN trial as enrollment rates increased in 2022. Compensation and related benefits for research and development employees, including stock-based compensation, increased by $7.1 million, and consulting and professional research and development services increased by $2.9 million, due to increased headcount and resources required to support clinical development of our product candidates during 2022. Facilities, depreciation and other expenses related to research and development increased by $0.7 million primarily due to our office lease that commenced in December 2021, and was amended to expand our leased space in September 2022, and other expenses related to the support of increased research and development headcount. These increases were partially offset by a decrease of $3.3 million in license and milestone expense. In September 2022, we recorded license and milestone expense of $3.7 million as a result of an amendment to the Novartis License that was assigned to us in connection with our purchase of MAU868 and certain related assets from Amplyx. In December 2021, we paid $5.0 million to Amplyx for the purchase of MAU868 and accrued $2.0 million of milestone expense in connection with the purchase.

We expect our research and development expenses to increase in future periods as we initiate our ORIGIN-3 Phase 3 trial of atacicept in IgAN, continue our COMPASS Phase 3 trial of atacicept in LN and develop other product candidates.

General and administrative

General and administrative expenses consist primarily of compensation and personnel-related expenses, including stock-based compensation, for our personnel in executive management, legal, finance, human resources, and other administrative functions. General and administrative expenses also include professional fees paid for accounting, auditing, legal, tax and consulting services, and other general overhead costs to support our operations. General and administrative expenses are recorded as expense in the period in which incurred, and payments we make prior to the receipt of goods or services to be used for general and administrative purposes efforts are deferred as prepaid expenses until the goods or services are received and used.



                                  Year Ended
                                 December 31,               CHANGE

(dollars in thousands) 2022 2021 AMOUNT % General and administrative $ 21,910 $ 11,918 $ 9,992 84 %

General and administrative expenses increased by $10.0 million, or 84%, to $21.9 million in the year ended December 31, 2022, from $11.9 million in the year ended December 31, 2021, due primarily to an increase of $3.8 million of payroll and related expenses including stock-based compensation, an increase of $2.3 million of rent and facilities expense primarily due to a change in lease accounting under which rent expense is recorded related to our previous headquarters facility in South San Francisco, California, which is subleased to another party, an increase of $1.6 million in insurance premium expenses, an increase of $0.8 million in consulting and non-employee director compensation expense, including stock-based compensation, an increase of $0.6 million in legal expenses, and an increase of $0.4 million in recruiting and placement fees.



Other income

                             Year Ended
                            December 31,              CHANGE
(dollars in thousands)    2022        2021       AMOUNT       %
Other income, net        $ 1,848     $ 1,794     $    54       (3 )%



Other income, net was $1.8 million in each of the years ended December 31, 2022 and 2021. In the year ended December 31, 2022, interest income increased by $1.7 million due to higher yields on marketable securities investments and we recognized $1.9 million of other income from a sublease due to changes in lease accounting. These increases were partly offset by a $1.0 million increase in interest expense related to loans payable to Oxford. In the year ended December 31, 2021, we recognized other income of $2.7 million recognized in 2021 from the sale of assets to NeuBase.

Liquidity and Capital Resources

Overview

To date, we have funded our operations primarily through proceeds from the sale of shares of our Class A common stock, redeemable convertible preferred stock, debt financing and convertible notes. From our inception through December 31, 2022, we have raised aggregate net cash proceeds of $295.0 million from the issuance and sale of redeemable convertible preferred stock, convertible notes, Class A common stock and our Loan Agreement with Oxford. Since the date of our incorporation, we have not generated any revenue from product sales and have incurred substantial operating losses and negative cash flows from operations.



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We use our cash to fund operations, primarily to fund our research and development efforts, clinical trials, establishing and maintaining our intellectual property portfolio, hiring personnel, raising capital, and providing general and administrative support for these operations. Cash used to fund operating expenses is affected by the timing of when we pay these expenses, as reflected in the change in our outstanding accounts payable, accrued expenses and prepaid assets.

We anticipate that we will continue to incur net losses for the foreseeable future as we continue research and development activities of atacicept and MAU868, hire additional staff, including clinical, operational, financial and management personnel, and incur additional expenses associated with operating as a public company. We expect to incur significant expenses and operating losses for the foreseeable future as we advance our clinical development activities and our product candidate portfolio. We expect that our research and development and general and administrative costs will increase substantially in connection with conducting additional clinical trials and clinical trials for our research programs and product candidates, contracting with third parties to support nonclinical studies and clinical trials, expanding our intellectual property portfolio, and providing general and administrative support for our operations. As a result, we will need additional capital to fund our operations, which we may obtain from additional equity or debt financings, collaborations, licensing arrangements, or other sources.

On May 18, 2021, we completed our IPO. In connection with our IPO, we issued and sold 5,002,500 shares of Class A common stock, including 652,500 shares associated with the full exercise on May 20, 2021, of the underwriters' option to purchase additional shares, at a price to the public of $11.00 per share, resulting in net proceeds to us of approximately $48.4 million, after deducting underwriting discounts and commissions and offering related expenses payable by us. Upon the closing of our IPO, all outstanding shares of our redeemable convertible preferred stock converted into 15,464,776 shares of our Class A common stock and 309,238 shares of our Class B common stock.

In December 2021, we entered into the Amplyx Agreement, pursuant to which we paid $5.0 million to Amplyx to purchase assets relating to MAU868. In September 2022, we entered into an amendment to the Novartis License to modify the terms of potential development milestone payments. Pursuant to this amendment, we issued 283,034 shares of Class A common stock to Novartis in exchange for a reduction of $7.0 million in contingent future development milestones, including the $2.0 million contingent milestone obligation we accrued in December 2021. The value of the shares issued was $5.7 million based on the closing market value of our Class A common stock as of the effective date of the amendment, and as a result of the amendment we recognized $3.7 million of research and development expense.

In December 2021, we entered into the Loan Agreement with Oxford, which was amended in November 2022, pursuant to which we may borrow up to an aggregate maximum principal amount of $50.0 million, of which $5.0 million was funded on December 17, 2021, $20.0 million was funded on November 4, 2022, and the balance of which is available to be drawn between January 3, 2022, and December 29, 2023. See "-Loan and security agreement" below.

In February 2022, we completed a follow-on public offering and issued 5,742,026 shares of Class A common stock for net proceeds of approximately $80.0 million, after deducting underwriting discounts and commissions and offering related expenses.

In February 2023, we completed a follow-on public offering and issued 16,428,572 shares of Class A common stock for net proceeds of approximately $107.6 million, after deducting underwriting discounts and commissions and offering related expenses.

As of December 31, 2022, we had cash, cash equivalents and marketable securities balances of $114.7 million, as compared to $79.7 million as of December 31, 2021. We expect that our existing cash and cash equivalents will be sufficient to fund our operating expenses and capital expenditure requirements for at least 12 months subsequent to the issuance date of the financial statements appearing elsewhere in this Annual Report.

Contractual Obligations

We enter into agreements in the normal course of business with various third parties for preclinical, clinical and other services. These contracts are generally cancellable without material penalty upon written notice.

Our operating lease obligations reflect our lease obligations for our office space in Brisbane, California, and our office and life science research space in South San Francisco, California.

During 2020, we vacated the leased facilities in South San Francisco. In November 2020, we entered into a non-cancellable sublease agreement for the facility, under the terms of which we are entitled to receive $8.8 million in lease payments over the term of the sublease, which ends concurrently with the original lease in September 2025. As tenant, we remain responsible for the $6.7 million minimum lease commitment remaining on the facilities as of December 31, 2022, regardless of whether we are paid by the subtenant.

In November 2021, we entered into a lease agreement for approximately 5,000 square feet of office space in Brisbane, California. The term of the lease is three years, and rent will be approximately $0.3 million for the first year, with scheduled annual 3% increases.



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In July 2022, we entered into an amendment to this lease to add approximately 5,000 square feet of office space in the same building adjacent to this location. The term of the lease amendment is 27 months from September 2022, and the base rent is approximately $0.3 million for the first 12 months with scheduled annual 3% increases. The lease includes renewal options.

Cash Flows

The following table summarizes our cash flows for the periods indicated.



                                                              Year Ended
                                                             December 31,
(dollars in thousands)                                    2022          2021
Net cash used in operating activities                   $ (67,596 )   $ (23,708 )
Net cash used in investing activities                     (70,552 )      (4,204 )
Net cash provided by financing activities                 101,933        53,882

Net (decrease) increase in cash, cash equivalents and


  restricted cash                                       $ (36,215 )   $  25,970


Operating Activities

For the year ended December 31, 2022, we used $67.6 million of cash in operating activities, attributable to a net loss of $89.1 million, a $8.2 million increase in prepaid expenses and other current assets and a $2.6 million decrease in operating lease liabilities, partially offset by a $10.6 million increase in accounts payable, $8.9 million of non-cash stock based compensation expense, a $7.0 million increase in accrued and other current liabilities, $3.7 million of non-cash license and milestone expenses and a $2.3 million reduction in the carrying amount of operating lease right-of-use assets.

For the year ended December 31, 2021, we used $23.7 million of cash in operating activities, attributable to a net loss of $32.6 million, a $2.7 million non-cash gain on sale of assets to NeuBase, and a $2.3 million increase in prepaid expenses and other current assets, partially offset by $5.0 million of the net loss related to the purchase of MAU868 classified as an investing activity, a $5.4 million increase in accrued and other current liabilities, and $3.0 million of non-cash stock-based compensation expense.

Investing Activities

For the year ended December 31, 2022, our investing activities used $70.6 million of cash, primarily resulting from the purchase of short-term marketable securities, less maturities of short-term marketable securities during the year.

For the year ended December 31, 2021, our investing activities used $4.2 million of cash, resulting from the $5.0 million cash payment for the purchase of MAU868 pursuant to the Amplyx Agreement, partially offset by $0.8 million of cash received resulting from the sale of assets to NeuBase.

Financing Activities

For the year ended December 31, 2022, our financing activities provided $101.9 million of cash resulting from $86.1 million gross proceeds received from our follow-on offering, $19.8 million of net cash proceeds from the issuance of debt to Oxford and $2.1 million proceeds from exercise of stock options and issuance of shares under our employee stock purchase plan, less $6.2 million offering costs related to our follow-on offering, including underwriting discounts and commissions.

For the year ended December 31, 2021, our financing activities provided $53.9 million of cash resulting from $51.2 million proceeds received from our IPO, net of underwriting discounts and commissions, partially offset by the payment of $2.8 million of related offering costs during the period, and $4.9 million of net cash proceeds from the issuance of debt to Oxford.

Loan and security agreement

On December 17, 2021, we entered into the Loan Agreement with Oxford, a Delaware limited liability company, as lender (Lender) and collateral agent. The Loan Agreement provides for a term loan (the Loan) in an aggregate maximum principal amount of $50.0 million, of which $5.0 million was funded on December 17, 2021, $20.0 million was funded on November 4, 2022, and the balance of which is available to be drawn between January 3, 2022 and December 31, 2023. The Loan is available in minimum draws of $5.0 million, entirely at our option and not contingent upon the completion of clinical, regulatory, financial or other related milestones.

In March 2023, we opted to extend the final maturity date of the Loan from December 2026, to December 2027, based on positive Phase 2b clinical trial data of atacicept in IgAN, as provided in the Loan Agreement. We are required to make monthly interest-only payments for 60 months followed by full amortization through maturity.

Initially, through December 30, 2021, the Loan incurred interest at a per annum rate of 8.254%. Thereafter, the Loan bears interest at a floating per annum rate (based on the actual number of days elapsed divided by a year of 360 days) equal to the greater of (i) 8.25%



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and (ii) the sum of (a) 1-Month CME Term SOFR as reported by CME Group Benchmark Administration Limited on the last business day of the month that immediately precedes the month in which the interest will accrue, and (b) 8.25%.

We are permitted to prepay the Loan in full or in part at any time upon 10 business days' written notice to the Lender, subject to the applicable Prepayment Fee (as defined below). Upon the earliest to occur of the maturity date, acceleration of the Loan or prepayment of the Loan, we are required to make a final payment equal to 7.0% of the aggregate principal amount of the Loan (the Final Fee). Any prepayments of the Loan, whether mandatory or voluntary, must include an amount equal to the sum of (a) the portion of the outstanding principal of the Loan being prepaid plus accrued and unpaid interest thereon through the prepayment date, (b) the Final Fee, (c) the Lender's expenses and all other obligations that are due and payable to the Lender, and (d) a prepayment fee of (i) 3.0% of the portion of the Loan being prepaid if the repayment is on or before the first anniversary of the funding date of such term loan or (ii) 2.0% of the portion of the Loan being prepaid if the repayment is after the first anniversary of the funding date but on or before the second anniversary of the funding date of such term loan (the Prepayment Fee). There is no Prepayment Fee for any prepayments occurring after the second anniversary of the funding date of such term loan.

Our obligations under the Loan Agreement are secured by a security interest in all of our assets, other than our intellectual property, which is subject to a negative pledge. The Loan Agreement does not contain any financial related covenants. Included in the Loan Agreement are customary representations and covenants that, subject to exceptions, restrict our ability to, among other things: declare dividends or redeem or repurchase equity interests; incur additional liens; make loans and investments; incur additional indebtedness; engage in mergers, acquisitions and asset sales; transact with affiliates; undergo a change in control; add or change business locations; and engage in businesses that are not related to our existing business.

Upon the occurrence of an event of default, a default interest rate of an additional 5.0% may be applied to the outstanding loan balances, and the Lender may declare all outstanding obligations immediately due and payable and take such other actions as set forth in the Loan Agreement. Events of default under the Loan Agreement include customary events of default, including, but not limited to: (i) failure to (a) make any payment of principal or interest on its due date, or (b) pay any other obligations within three business days after such obligations are due and payable; (ii) failure to perform any obligation under specified covenants; (iii) the occurrence of a material adverse change; (iv) we or any of our subsidiaries being or becoming insolvent, beginning an insolvency proceeding, or becoming subject to an insolvency proceeding that is not dismissed or stayed within 45 days; (v) a default under any agreement with a third party resulting in a right by such third party to accelerate the maturity of any indebtedness in an amount in excess of $500,000 or that could reasonably be expected to have a material adverse change; (vi) the rendering of judgments, orders, or decrees for the payment of money in an amount, individually or in the aggregate, of at least $500,000 that remain unsatisfied, unvacated, or unstayed for a period of 10 days after the entry thereof; (vii) revocation, rescission, suspension or adverse modification of any governmental approval, or non-renewal of a governmental approval in the ordinary course for a full term, that could reasonably be expected to result in a material adverse change; and (viii) failure of a lien created under the Loan Agreement or any other loan document to constitute a valid and perfected lien on any of the collateral purported to be secured thereby, subject to no prior or equal lien, other than permitted liens.

At-the-Market Offering

In June 2022, we entered into a sales agreement with Cowen and Company LLC (Cowen) as sales agent, pursuant to which we may issue and sell shares of our Class A common stock for an aggregate maximum offering price of $150.0 million under an at-the-market offering program (ATM). We will pay Cowen up to 3.0% of gross proceeds of the Class A common stock sold through the ATM. As of December 31, 2022, no shares of Class A common stock had been issued or sold under the ATM.

Emerging growth company status

We are an emerging growth company, as defined in the JOBS Act. We have elected to use the extended transition period for complying with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date that (i) we are no longer an emerging growth company or (ii) we affirmatively and irrevocably opt out of the extended transition period provided in the JOBS Act. As a result, our financial statements may not be comparable to companies that comply with the new or revised accounting pronouncements as of public company effective dates.

We will remain an emerging growth company under the JOBS Act until the earliest of (i) the last day of our first fiscal year in which we have total annual gross revenue of $1.235 billion or more, (ii) the date on which we have issued more than $1.0 billion of non-convertible debt instruments during the previous three fiscal years, (iii) the date on which we are deemed a "large accelerated filer" under the rules of the SEC with at least $700.0 million of outstanding equity securities held by non-affiliates, or (iv) December 31, 2026.

Critical Accounting Policies and Significant Judgments and Estimates

The discussion and analysis of our financial condition and results of operations is based on our financial statements, which have been prepared in accordance with United States generally accepted accounting principles. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, and the disclosure of contingent



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assets and liabilities, at the date of the financial statements, as well as expenses incurred during the reporting periods. Our estimates are based on our historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. We believe that the accounting policies discussed below are critical to understanding our historical and future performance, as these policies relate to the more significant areas involving management's judgments and estimates.

While our significant accounting policies are described in the notes to our financial statements, we believe that the following critical accounting policies and estimates are most important to understanding and evaluating our reported financial results.

Research and development contract costs, and related prepaid and accrued balances

We enter into various research and development and other agreements with commercial firms, researchers and others for provisions of goods and services from time to time. These agreements are generally cancellable, and the related costs are recorded as research and development expenses as incurred. We record accruals for estimated ongoing research and development costs. When evaluating the adequacy of the accrued liabilities, we analyze progress of the studies or clinical trials, including the phase or completion of events, invoices received and contracted costs. Significant judgments and estimates are made in determining the prepaid and accrued balances at the end of any reporting period. Actual results could differ materially from our estimates.

Fair value of common stock

Historically, for all periods prior to our IPO, the fair values of the shares of our common stock underlying our share-based awards were determined on each grant date by our board of directors with input from management and the assistance of an independent third-party valuation specialist. Given the absence of a public trading market of our common stock, and in accordance with the American Institute of Certified Public Accountants Practice Aid, Valuation of Privately-Held-Company Equity Securities Issued as Compensation (Practice Aid), our board of directors exercised reasonable judgment and considered numerous objective and subjective factors to determine the best estimate of the fair value of our common stock at each grant date. These factors include:

external market conditions affecting the proteomics and genomics biotechnology industry and trends within the industry;

our stage of development;

the rights, preferences and privileges of our redeemable convertible preferred stock relative to those of our common stock;

the prices at which we sold shares of our redeemable convertible preferred stock;

actual operating results and projected financial performance, including our levels of available capital resources;

the progress of our research and development efforts and business strategy;

equity market conditions affecting comparable public companies;

general U.S. market conditions; and

the lack of marketability of our common stock.

In valuing our common stock, the fair value of our business, or enterprise value, was determined using various valuation methods, including combinations of income, market and asset approaches with input from management. The income approach determines value by using one or more methods that convert anticipated economic benefits into a present single amount. The application of the income approach establishes value by methods that discount or capitalize earnings or cash flow, by a discount or capitalization rate that reflects investors' rate of return expectations, market conditions, and the relative risk of the subject investment. The market approach involves identifying and evaluating comparable public companies and acquisition targets that operate in the same industry or which have similar operating characteristics as the subject company. From the comparable companies, publicly available information is used to extrapolate market-based valuation multiples that are applied to historical or prospective financial information in order to derive an indication of value. The asset approach determines the value of the underlying assets and liabilities of a business as a means of determining the value of the business in aggregate. This approach can include the value of both tangible and intangible assets.

Option Pricing Method (OPM). Under the OPM, shares are valued by creating a series of call options with exercise prices based on the liquidation preferences and conversion terms of each equity class. The estimated fair values of the redeemable convertible preferred stock and common stock are inferred by analyzing these options. This method is appropriate to use when the range of possible future outcomes is difficult to predict and thus creates highly speculative forecasts.

Probability-Weighted Expected Return Method (PWERM). The PWERM is a scenario-based analysis that estimates value per share based on the probability-weighted present value of expected future investment returns, considering each of the possible outcomes available to us, as well as the economic and control rights of each share class. This method is



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generally most appropriate to use when the time to a liquidity event is short, making the range of possible future outcomes relatively easy to predict.

Based on our early stage of development and other relevant factors, we determined that the OPM was the most appropriate method for allocating our enterprise value to determine the estimated fair value of our common stock for valuations during early 2020.

Beginning in March 2020, we used a hybrid method to determine the estimated fair value of our common stock, which included both the OPM and PWERM models.

Application of these approaches involves the use of estimates, judgment, and assumptions that are highly complex and subjective, such as those regarding our expected future revenue, expenses, and cash flows, discount rates, market multiples, the selection of comparable companies, and the probability of future events. Changes in any or all of these estimates and assumptions, or the relationships between those assumptions, impact our valuations as of each valuation date and may have a material impact on the valuation of common stock.

The assumptions underlying these valuations represent our management's best estimate, which involve inherent uncertainties and the application of management judgment. As a result, if factors or expected outcomes change and we use significantly different assumptions or estimates, our stock-based compensation could be materially different.

After the completion of our IPO, the fair value of each share of the underlying common stock has been determined based on the closing price as reported on the date of grant on the primary stock exchange on which our Class A common stock is traded.

Recent accounting pronouncements

See Note 2 to our audited financial statements included elsewhere in this Annual Report on Form 10-K for more information about recent accounting pronouncements, the timing of their adoption, and our assessment, to the extent we have made one yet, of their potential impact on our financial condition of results of operations.

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