季報
季度報告
10-Q
2026-08-07
aTyr Pharma次季虧損收窄至1031萬美元 擬啟動肺結節病新第三期研究
AI 繁中摘要
aTyr Pharma(納斯達克:ATYR)公佈截至2026年6月30日止第二季度及上半年業績(10-Q)。公司為臨床階段生物科技企業,專注tRNA合成酶生物學,開發纖維化及炎症療法。期內淨虧損收窄:第二季度淨虧損約1,031萬美元(每股0.11美元),去年同期虧損1,953萬美元;上半年淨虧損約2,110萬美元(每股0.22美元),去年同期虧損3,441萬美元。研發開支顯著下降,第二季度為675萬美元(去年同期1,538萬美元),主因efzofitimod第三期臨床完成後相關開支減少;上半年研發開支1,407萬美元(去年同期2,720萬美元)。
現金狀況方面,截至2026年6月30日,公司持有現金、現金等價物、受限現金及可供出售投資合共約5,890萬美元,管理層相信足以應付未來至少12個月的營運資金需求。期內未動用ATM發行計劃,上半年經營活動現金流出約2,187萬美元。
業務重點方面,先前公佈的EFZO-FIT第三期研究(肺結節病)未達主要終點,但公司於2026年4月與FDA舉行C型會議,並於5月收到會議記錄。根據FDA意見,公司計劃啟動一項新的第三期研究(Planned Phase 3 Study),針對伴有限制性肺病的慢性症狀性肺結節病患者,以FVC(用力肺活量)變化為主要終點,KSQ-Lung評分為關鍵次要終點。公司亦計劃將劑量頻率由每四週一次增至每三週一次,並加入額外安全監測措施。此外,公司已於2026年6月向FDA提交新研究方案,正等待回覆。
另一重大事件:日本合作方Kyorin Pharmaceutical於2026年5月通知終止efzofitimod在日本ILD的開發及商業化協議,終止於2026年7月30日生效,相關權利已回歸aTyr,公司現持有efzofitimod全球權利。
公司於2026年8月7日宣佈企業重組及優先項目計劃,裁減約60%人手至20名全職員工,預計產生約420萬美元遣散及相關費用,並將年度營運開支削減約1,300萬美元。重組旨在節省資本,為潛在新第三期研究做準備。公司承認需要額外資本以推進該研究,可能透過股權、債務、合作或授權等方式籌集。
此外,公司面對兩宗合併的證券集體訴訟,指控其及管理層就efzofitimod作出虛假或誤導陳述,公司已於2026年7月提出駁回動議,目前未就此計提撥備。
整體而言,公司正集中資源推動efzofitimod在肺結節病的後期臨床開發,但資金需求及監管不確定性仍為主要風險。
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10-Q 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f+ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2026 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37378 ATYR PHARMA, INC. (Exact name of registrant as specified in its charter) Delaware 20-3435077 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 10240 Sorrento Valley Road, Suite 300, San Diego, CA 92121 (Address of principal executive offices) (Zip Code) (858) 731-8389 (Registrant’s telephone number, including area code) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, par value $0.001 per share ATYR The Nasdaq Capital Market Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer ☐ Accelerated filer ☐ Non-accelerated filer ☒ Smaller reporting company ☒ Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒ As of August 6, 2026, there were 98,087,425 shares of the registrant’s common stock, par value $0.001 per share, outstanding. ATYR PHARMA, INC. FORM 10-Q TABLE OF CONTENTS Page PART I. FINANCIAL INFORMATION Item 1. Financial Statements 3 Condensed Consolidated Balance Sheets as of June 30, 2026 (unaudited) and December 31, 2025 3 Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2026 and 2025 (unaudited) 4 Condensed Consolidated Statements of Comprehensive Loss for the three and six months ended June 30, 2026 and 2025 (unaudited) 5 Condensed Consolidated Statements of Stockholders’ Equity for the three and six months ended June 30, 2026 and 2025 (unaudited) 6 Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2026 and 2025 (unaudited) 7 Notes to Condensed Consolidated Financial Statements (unaudited) 8 Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations 16 Item 3. Quantitative and Qualitative Disclosures About Market Risk 23 Item 4. Controls and Procedures 23 PART II. OTHER INFORMATION Item 1. Legal Proceedings 24 Item 1A. Risk Factors 24 Item 2. Unregistered Sales of Equity Securities and Use of Proceeds 63 Item 3. Defaults Upon Senior Securities 63 Item 4. Mine Safety Disclosures 63 Item 5. Other Information 63 Item 6. Exhibits 66 SIGNATURES 68 PART I. FINANCIAL INFORMATION Item 1. Financial Statements aTyr Pharma, Inc. Condensed Consolidated Balance Sheets (in thousands, except share and per share data) June 30, December 31, 2026 2025 (unaudited) Assets Current assets: Cash and cash equivalents $ 16,160 $ 10,743 Available-for-sale investments 41,258 67,944 Other receivables 426 873 Prepaid expenses 518 677 Total current assets 58,362 80,237 Restricted cash 1,495 2,235 Property and equipment, net 4,127 4,263 Operating lease, right-of-use assets 5,353 5,524 Financing lease, right-of-use assets 298 596 Other assets 190 148 Total assets $ 69,825 $ 93,003 Liabilities and Stockholders’ Equity Current liabilities: Accounts payable $ 3,242 $ 3,891 Accrued expenses 6,690 9,791 Current portion of operating lease liability 946 836 Current portion of financing lease liability 518 630 Total current liabilities 11,396 15,148 Long-term operating lease liability, net of current portion 9,799 10,308 Long-term financing lease liability, net of current portion 36 259 Commitments and contingencies (Note 4) Stockholders’ equity: Preferred stock, $0.001 par value per share; 5,000,000 undesignated authorized shares as of June 30, 2026 (unaudited) and December 31, 2025, respectively; no shares issued or outstanding as of June 30, 2026 (unaudited) and December 31, 2025 — — Common stock, $0.001 par value per share; 340,000,000 and 170,000,000 authorized shares as of June 30, 2026 (unaudited) and December 31, 2025, respectively; 98,087,425 and 98,031,014 issued and outstanding shares as of June 30, 2026 (unaudited) and December 31, 2025, respectively 98 98 Additional paid-in capital 676,022 673,554 Accumulated other comprehensive loss (68 ) (8 ) Accumulated deficit (627,264 ) (606,164 ) Total aTyr Pharma, Inc. stockholders’ equity 48,788 67,480 Noncontrolling interest in Pangu BioPharma Limited (194 ) (192 ) Total stockholders’ equity 48,594 67,288 Total liabilities and stockholders’ equity $ 69,825 $ 93,003 See accompanying notes. 3 aTyr Pharma, Inc. Condensed Consolidated Statements of Operations (in thousands, except share and per share data) Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 (unaudited) Operating expenses: Research and development $ 6,748 $ 15,384 14,065 27,198 General and administrative 4,133 4,929 8,252 8,888 Total operating expenses 10,881 20,313 22,317 36,086 Loss from operations (10,881 ) (20,313 ) (22,317 ) (36,086 ) Total other income (expense), net 571 781 1,215 1,673 Consolidated net loss (10,310 ) (19,532 ) (21,102 ) (34,413 ) Net loss attributable to noncontrolling interest in Pangu BioPharma Limited 1 1 2 2 Net loss attributable to aTyr Pharma, Inc. $ (10,309 ) $ (19,531 ) $ (21,100 ) $ (34,411 ) Net loss per share, basic and diluted $ (0.11 ) $ (0.22 ) $ (0.22 ) $ (0.39 ) Shares used in computing net loss per share, basic and diluted 98,069,915 90,120,235 98,056,949 88,312,722 See accompanying notes. 4 aTyr Pharma, Inc. Condensed Consolidated Statements of Comprehensive Loss (in thousands) Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 (unaudited) Consolidated net loss $ (10,310 ) $ (19,532 ) $ (21,102 ) $ (34,413 ) Other comprehensive loss: Change in unrealized gain (loss) on available-for-sale investments, net of tax 2 (9 ) (60 ) (35 ) Comprehensive loss (10,308 ) (19,541 ) $ (21,162 ) $ (34,448 ) Comprehensive loss attributable to noncontrolling interest in Pangu BioPharma Limited 1 1 2 2 Comprehensive loss attributable to aTyr Pharma, Inc. common stockholders $ (10,307 ) $ (19,540 ) $ (21,160 ) $ (34,446 ) See accompanying notes. 5 aTyr Pharma, Inc. Condensed Consolidated Statements of Stockholders’ Equity (in thousands, except share data) Six Months Ended June 30, 2026 (unaudited) Common Stock Additional Paid-In Other Comprehensive Accumulated Noncontrolling Total Stockholders’ Shares Amount Capital Gain/(Loss) Deficit Interest Equity Balance as of December 31, 2025 98,031,104 $ 98 $ 673,554 $ (8 ) $ (606,164 ) $ (192 ) $ 67,288 Issuance of common stock upon release of restricted stock units 20,108 — — — — — — Stock-based compensation — — 1,307 — — — 1,307 Net unrealized loss on investments, net of tax — — — (62 ) — — (62 ) Net loss — — — — (10,791 ) (1 ) (10,792 ) Balance as of March 31, 2026 98,051,212 98 674,861 (70 ) (616,955 ) (193 ) 57,741 Issuance of common stock pursuant to employee stock purchase plan 36,213 — 16 — — — 16 Stock-based compensation — — 1,145 — — — 1,145 Net unrealized gain on investments, net of tax — — — 2 — — 2 Net loss — — — — (10,309 ) (1 ) (10,310 ) Balance as of June 30, 2026 98,087,425 $ 98 $ 676,022 $ (68 ) $ (627,264 ) $ (194 ) $ 48,594 Six Months Ended June 30, 2025 (unaudited) Common Stock Additional Paid-In Other Comprehensive Accumulated Noncontrolling Total Stockholders’ Shares Amount Capital Gain/(Loss) Deficit Interest Equity Balance as of December 31, 2024 84,038,922 $ 84 $ 602,021 $ (40 ) $ (532,046 ) $ (187 ) $ 69,832 Issuance of common stock upon release of restricted stock units 21,108 — — — — — — Issuance of common stock upon exercise of stock options 900 — 2 — — — 2 Issuance of common stock from at-the-market offerings, net of offering costs 4,941,895 5 18,752 — — — 18,757 Stock-based compensation — — 1,178 — — — 1,178 Net unrealized loss on investments, net of tax — — — (26 ) — — (26 ) Net loss — — — — (14,880 ) (1 ) (14,881 ) Balance as of March 31, 2025 89,002,825 89 621,953 (66 ) (546,926 ) (188 ) 74,862 Issuance of common stock upon exercise of stock options 7,520 — 17 — — — 17 Issuance of common stock pursuant to employee stock purchase plan 31,007 — 79 — — — 79 Issuance of common stock from at-the-market offerings, net of offering costs 3,829,830 4 17,930 — — — 17,934 Stock-based compensation — — 1,305 — — — 1,305 Net unrealized loss on investments, net of tax — — — (9 ) — — (9 ) Net loss — — — — (19,531 ) (1 ) (19,532 ) Balance as of June 30, 2025 92,871,182 $ 93 $ 641,284 $ (75 ) $ (566,457 ) $ (189 ) $ 74,656 See accompanying notes. 6 aTyr Pharma, Inc. Condensed Consolidated Statements of Cash Flows (in thousands) Six Months Ended June 30, 2026 2025 (unaudited) Cash flows from operating activities: Consolidated net loss $ (21,102 ) $ (34,413 ) Adjustments to reconcile net loss to net cash used in operating activities: Depreciation and amortization 330 333 Stock-based compensation 2,452 2,483 Accretion of discount of available-for-sale investment securities (401 ) (981 ) Amortization of right-of-use assets 469 437 Gain on financing lease bargain purchase option (48 ) — Changes in operating assets and liabilities: Other receivables 455 1,238 Prepaid expenses and other assets 109 1,445 Accounts payable and accrued expenses (3,733 ) 485 Operating lease liability (399 ) (341 ) Net cash used in operating activities (21,868 ) (29,314 ) Cash flows from investing activities: Purchases of property and equipment (211 ) (9 ) Purchases of available-for-sale investment securities (13,846 ) (41,260 ) Maturities of available-for-sale investment securities 40,873 40,150 Net cash provided by (used in) investing activities 26,816 (1,119 ) Cash flows from financing activities: Proceeds from issuance of common stock through option exercises — 19 Proceeds from issuance of common stock through employee stock purchase plan 16 79 Proceeds from issuance of common stock from at-the-market offerings, net of offering costs — 36,691 Principal paid on finance lease liabilities (287 ) (264 ) Net cash (used in) provided by financing activities (271 ) 36,525 Net change in cash, cash equivalents and restricted cash 4,677 6,092 Cash, cash equivalents and restricted cash at beginning of period 12,978 14,006 Cash, cash equivalents and restricted cash at the end of period $ 17,655 $ 20,098 Cash and cash equivalents at the end of period $ 16,160 $ 17,220 Restricted cash at the end of period 1,495 2,878 Cash, cash equivalents and restricted cash at the end of period $ 17,655 $ 20,098 Supplemental disclosure of cash flow information: Interest paid $ 30 $ 53 Purchases of property and equipment in accounts payable $ — $ 17 See accompanying notes. 7 aTyr Pharma, Inc. Notes to Condensed Consolidated Financial Statements (Unaudited) 1. Organization, Business, Basis of Presentation and Summary of Significant Accounting Policies Organization and Business We were incorporated in the state of Delaware on September 8, 2005. We are a clinical stage biotechnology company leveraging evolutionary intelligence to translate tRNA synthetase biology into new therapies for fibrosis and inflammation. tRNA synthetases are ancient, essential proteins that have evolved novel domains that regulate diverse pathways extracellularly in humans. Our discovery platform is focused on unlocking hidden therapeutic intervention points by uncovering signaling pathways driven by our proprietary library of domains derived from all 20 tRNA synthetases. Principles of Consolidation Our unaudited condensed consolidated financial statements include our accounts and our 98% majority-owned subsidiary in Hong Kong, Pangu BioPharma Limited (Pangu BioPharma). All intercompany transactions and balances are eliminated in consolidation. Unaudited Interim Financial Information The accompanying interim unaudited condensed consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (U.S. GAAP) and follow the requirements of the U.S. Securities and Exchange Commission (SEC) for interim reporting. As permitted under those rules, certain footnotes or other financial information that are normally required by U.S. GAAP can be condensed or omitted. In our opinion, the unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and include all adjustments, which include only normal recurring adjustments, necessary for the fair presentation of our financial position and our results of operations and cash flows for periods presented. These statements do not include all disclosures required by U.S. GAAP and should be read in conjunction with our financial statements and accompanying notes for the fiscal year ended December 31, 2025, contained in our Annual Report on Form 10-K for the year ended December 31, 2025, filed with the SEC on March 5, 2026. The results of the interim periods are not necessarily indicative of the results expected for the full fiscal year or any other interim period or any future year or period. Liquidity and Financial Condition We have incurred net losses and negative cash flows from operations since our inception in 2005, including a consolidated net loss of $10.3 million and $21.1 million for the three and six months ended June 30, 2026. As of June 30, 2026, we had an accumulated deficit of $627.3 million. We currently have an “at-the-market” offering program (the Jefferies ATM Offering Program) through an Open Market Sale AgreementSM with Jefferies LLC (Jefferies). We did not utilize the Jefferies ATM Offering Program during the three and six months ended June 30, 2026. We do not expect to generate any revenues from product sales unless and until we successfully complete development and obtain regulatory approval for one or more of our product candidates, which we expect will take a number of years at a minimum. If we obtain regulatory approval for any of our product candidates, we expect to incur significant commercialization expenses related to product sales, marketing, manufacturing and distribution. Accordingly, we will need to raise substantial additional capital to fund our operations. The amount and timing of our future funding requirements will depend on many factors, including the pace and results of our preclinical and clinical development efforts and the timing and nature of the regulatory approval process for our product candidates. We anticipate that we will seek to fund our operations through equity or debt offerings, grant funding, collaborations, strategic partnerships and/or licensing arrangements. However, we may be unable to raise additional capital or enter into such arrangements when needed on favorable terms or at all. Our failure to raise capital or enter into such arrangements when needed would have a negative impact on our financial condition and ability to develop our product candidates. We believe that our existing cash, cash equivalents, restricted cash and available-for-sale investments of $58.9 million as of June 30, 2026 will be sufficient to meet our material cash requirements from known contractual and other obligations for a period of at least one year from the filing date of this Quarterly Report on Form 10-Q. Restricted Cash As of June 30, 2026, restricted cash was approximately $1.5 million, which was held as a security deposit in conjunction with our corporate headquarters facility lease and financing leases as discussed further in Note 4 - Commitments and Contingencies. 8 Allowance of Credit Losses For available-for-sale investments in an unrealized loss position, we first assess whether we intend to sell, or if it is more likely than not that we will be required to sell, the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through earnings. For available-for-sale investments that do not meet the aforementioned criteria, we evaluate whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, we consider the severity of the impairment, any changes in interest rates, market conditions, changes to the underlying credit ratings and forecasted recovery, among other factors. The credit-related portion of unrealized losses, and any subsequent improvements, are recorded in interest income through an allowance account. Any impairment that has not been recorded through an allowance for credit losses is included in other comprehensive income (loss) on the unaudited condensed consolidated statements of operations and comprehensive loss. We elected the practical expedient to exclude the applicable accrued interest from both the fair value and amortized costs basis of our available-for-sale investments for purposes of identifying and measuring an impairment. Accrued interest receivable on available-for-sale investments is recorded within other receivables on our unaudited condensed consolidated balance sheets. Our accounting policy is to not measure an allowance for credit loss for accrued interest receivable and to write-off any uncollectible accrued interest receivable as a reversal of interest income in a timely manner, which we consider to be in the period in which we determine the accrued interest will not be collected by us. Use of Estimates Our unaudited condensed consolidated financial statements are prepared in accordance with U.S. GAAP. The preparation of our unaudited condensed consolidated financial statements requires us to make estimates and assumptions that impact the reported amounts of assets, liabilities and expenses and the disclosure for these items in our unaudited condensed consolidated financial statements and accompanying notes. The most significant estimates in our unaudited condensed consolidated financial statements relate to clinical trial and research and development expenses. Although these estimates are based on our knowledge of current events and actions we may undertake in the future, actual results may ultimately differ materially from these estimates and assumptions. Accrued Expenses Accrued expenses include salaries, wages, benefits costs, consulting fees, legal and research and development costs. We have entered into contractual arrangements related to our clinical studies with clinical research organizations (CROs) and contracted development and manufacturing organizations (CDMOs) and recognize expense based on work completed and efforts expended pursuant to our contractual arrangements. We make estimates of our accrued CRO costs as of each balance sheet date based on facts and circumstances known at the time and include total trial management costs, sites activated, patients enrolled and number of patient visits. We estimate the time period over which services will be performed and the level of effort to be expended in each period. There may be instances in which payments made to our service providers including CROs and CDMOs, will temporarily exceed the level of services provided and result in a prepayment of the expense. If the actual timing of the performance of services or the level of effort varies from our estimate, we adjust the accrual or prepaid expense balance accordingly. Historically, our estimated accrued liabilities have materially approximated actual expenses incurred. Leases We determine if an arrangement is a lease at inception. Short-term leases with an initial term of 12 months or less are not recorded on our balance sheet. For long-term leases with an initial term of greater than 12 months, we recognize a right-of-use asset (ROU) and a lease liability based on the present value of future lease payments using an estimated rate of interest that we would pay to borrow equivalent funds on a collateralized basis at the lease commencement date. We determine the lease term at the commencement date by considering whether renewal options and termination options are reasonably assured of exercise. Rent expense for operating leases is recognized on a straight-line basis over the lease term and is included in operating expenses in our unaudited condensed consolidated statements of operations. For financing leases, interest expense and amortization of the ROU is included in operating expenses in our unaudited condensed consolidated statements of operations and variable lease payments are expensed as incurred. If a lease is modified, the modified contract is evaluated to determine whether it is or contains a lease. If a lease continues to exist, the lease modification is determined to be a separate contract when the modification grants the lessee an additional ROU that is not included in the original lease and the lease payments increase commensurate with the standalone price for the additional ROU. A lease modification that results in a separate contract will be accounted for in the same manner as a new lease. For a modification that is not a separate contract, we reassess the lease classification using the modified terms and conditions and the facts and circumstances as of the effective date of the modification and recognize the amount of the remeasurement of the lease liability for the modified lease as an adjustment to the corresponding ROU asset. Our ROU assets consist of a non-cancelable operating lease for our corporate headquarters and financing leases for various research and development and information technology equipment. 9 We do not separate lease and non-lease components for our long-term leases. Revenue Recognition We evaluate our agreements under Accounting Standards Codification (ASC) Topic 606, Revenue from Contracts with Customers and ASC Topic 808, Collaborative Arrangements. We recognize revenue when we transfer promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. In determining the appropriate amount of revenue to be recognized as we fulfill our obligations under our agreement, we perform the following steps: (i) identification of the promised goods or services in the contract; (ii) determination of whether the promised goods or services are performance obligations including whether they are distinct in the context of the contract; (iii) measurement of the transaction price, including the constraint on variable consideration; (iv) allocation of the transaction price to the performance obligations; and (v) recognition of revenue when (or as) we satisfy each performance obligation. As part of the accounting for these arrangements, we must develop assumptions that require judgment to determine the stand-alone selling price for each performance obligation identified in the contract. We use key assumptions to determine the stand-alone selling price, which may include forecasted revenues, development timelines, reimbursement rates for personnel costs, discount rates and probabilities of technical and regulatory success. We recognize revenue in one of two ways, over time or at a point in time. We recognize revenue over time when we are executing on our performance obligation over time and our partner receives benefit over time. For example, we recognize revenue over time when we provide research and development services. We recognize revenue at a point in time when we transfer control of a distinct performance obligation to our partner. For example, if a license to our intellectual property is determined to be distinct from the other performance obligations identified in the arrangement, we recognize revenues from non-refundable, up-front fees allocated to the license when the license is transferred to the licensee and the licensee is able to use and benefit from the license. Net Loss Per Share Basic net loss per share is calculated by dividing the net loss by the weighted-average number of common shares outstanding for the period. Diluted net loss per share is calculated by dividing the net loss by the weighted-average number of common stock equivalents outstanding for the period determined using the treasury-stock method. Dilutive common stock equivalents are comprised of warrants for common stock, options and restricted stock units outstanding under our stock option plans and estimated shares to be purchased under our employee stock purchase plan. For all periods presented, there is no difference in the number of shares used to calculate basic and diluted shares outstanding due to our net loss position. Potentially dilutive securities not considered for the calculation of diluted net loss per share are as follows (in common stock equivalents): Six Months Ended June 30, 2026 2025 Common stock options and restricted stock units 13,976,293 9,734,321 Employee stock purchase plan 38,241 46,883 Total 14,014,534 9,781,204 Segment Reporting Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision-maker (CODM) in making decisions regarding resource allocation and assessing performance. We view our operations and manage our business in one operating segment, which includes all activities related to the discovery and development of our product candidates. Our CODM is our Chief Executive Officer, who reviews and evaluates consolidated research and development expenses, general and administrative expenses, net loss, net cash used in operating activities and our consolidated cash and cash equivalents for purposes of making operating decisions, allocating resources and planning and forecasting future periods. 10 The table below summarizes the significant expense categories regularly reviewed by our CODM for the three and six months ended June 30, 2026 and 2025. Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Research and development expenses: Efzofitimod expenses $ 2,106 $ 12,290 5,641 21,094 Preclinical development and other shared research and development expenses 4,230 2,623 7,585 5,184 Non-cash expenses (depreciation and stock-based compensation) 412 471 839 920 Total research and development expenses 6,748 15,384 14,065 27,198 General and administrative expenses: Other general and administrative expenses 3,232 3,928 6,307 6,992 Non-cash expenses (depreciation and stock-based compensation) 901 1,001 1,945 1,896 Total general and administrative expenses 4,133 4,929 8,252 8,888 Other segment items (1) 571 781 1,215 1,673 Consolidated net loss $ (10,310 ) $ (19,532 ) $ (21,102 ) $ (34,413 ) (1) Other segment items includes interest income and interest expense. Recent Accounting Pronouncements In November 2024, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40), which requires entities to disclose, on an annual and interim basis, disaggregated information about certain income statement expense line items on the face of the income statement. The standard is effective for annual reporting periods beginning after December 15, 2026 and interim periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosure. 2. Fair Value Measurements The carrying amounts of cash equivalents, prepaid and other assets, accounts payable and accrued liabilities are considered to be representative of their respective fair values because of the short-term nature of those instruments. Investment securities are recorded at fair value. The accounting guidance defines fair value, establishes a consistent framework for measuring fair value and expands disclosure for each major asset and liability category measured at fair value on either a recurring or nonrecurring basis. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the accounting guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows: Level 1: Observable inputs such as quoted prices in active markets. Level 2: Inputs, other than the quoted prices in active markets that are observable either directly or indirectly. Level 3: Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. Financial assets measured at fair value on a recurring basis consist of investment securities. Investment securities are recorded at fair value, defined as the exit price in the principal market in which we would transact, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Level 2 securities are valued using quoted market prices for similar instruments, non-binding market prices that are corroborated by observable market data, or discounted cash flow techniques and include our investments in commercial paper, corporate debt securities and U.S. government agencies 11 securities. We have no financial liabilities measured at fair value on a recurring basis. None of our non-financial assets and liabilities are recorded at fair value on a non-recurring basis. No transfers between levels have occurred during the periods presented. Assets measured at fair value on a recurring basis are as follows (in thousands): Fair Value Measurements Using Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) As of June 30, 2026