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Kalaris Therapeutics, Inc.

For the period ended Dec 31, 2025. Filed Mar 17, 2026.

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About this filing

A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Mar 17, 2026

KLRS$2.42+2.5%Stored close · as of Nov 6, 2026

What changed in Management’s Discussion and Analysis?

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Previous report: 10-K

Period ended 2024-12-31; filed 2025-03-07.

0000950170-25-035143

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Current report: 10-K

Period ended 2025-12-31; filed 2026-03-17.

0001193125-26-110659

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The baseline is this issuer’s latest earlier reporting period of the same form that was filed before the current report. A previous 10-Q is a different quarter, not a year-over-year comparison. Amendments are excluded.

Compared 151 previous paragraphs and 162 current paragraphs.

17 unchanged; 17 reworded; 128 added; 116 removed; 1 previous and 0 current paragraphs rearranged.

Tables are not compared: 2 previous and 3 current tables excluded. Dates, whitespace, punctuation and numbering changes are ignored; changes to financial figures remain significant.

A changed paragraph is not evidence that risk increased or decreased. An unchanged paragraph does not establish that risk stayed the same.

Added paragraphs (128)

Current report

We are a clinical stage biopharmaceutical company dedicated to the development and commercialization of treatments for prevalent retinal diseases with major unmet medical needs.

Current report

We are developing TH103, a novel, clinical stage anti-vascular endothelial growth factor (“VEGF”) drug, specifically engineered to achieve extended intraocular retention with enhanced VEGF inhibition in patients with exudative and/or neovascular retinal diseases. TH103 is a fully humanized recombinant fusion protein, functioning as a “decoy receptor” (a VEGF trap), leveraging salient molecular properties of the human body’s native, highest affinity VEGF receptor 1. In head-to-head preclinical studies, TH103 showed more anti-VEGF activity and longer duration of activity compared to aflibercept, the current global market-leading anti-VEGF agent, which also functions as a decoy receptor VEGF trap but differs from TH103 in key molecular elements. Initial data from our Phase 1a single ascending dose (“SAD”) trial of TH103 in treatment-naïve neovascular Age-related Macular Degeneration (“nAMD”) patients showed that TH103 was generally well tolerated and exhibited improvements on functional and anatomical outcomes at 1-month post-dosing. Preliminary single dose pharmacokinetic data and retreatment results provide evidence that TH103 may offer extended treatment durability after a standard four-dose loading regimen.

Current report

We are investigating TH103 as a treatment for patients with nAMD, a leading cause of blindness in the United States and Europe that affect an estimated 1.6 million adults in the United States. We are currently conducting a Phase 1b/2 multiple ascending dose clinical trial of TH103 in patients with nAMD, which is intended to build upon our ongoing Phase 1a single ascending dose clinical trial. The Phase 1b/2 dose-finding trial is designed to evaluate multiple dose levels of TH103 in approximately 60 to 80 nAMD patients. In the trial, patients are expected to receive four initial monthly intravitreal injections of TH103 and assessments are expected to include safety and preliminary efficacy with a primary time point for analysis at one month following the last injection. Patients will then be followed in an extension phase of the study. We expect to report preliminary data from the Phase 1b/2 clinical trial in the first half of 2027. Assuming successful completion of the ongoing Phase 1b/2 clinical trial of TH103, and subject to the favorable results from such trial and discussions with regulators, we intend to initiate Phase 3 clinical trials of TH103 for nAMD by year-end 2027. We also plan to expand the development of TH103 beyond nAMD into other prevalent VEGF-mediated retinal diseases, such as Diabetic Macular Edema (“DME”), diabetic retinopathy (“DR”), and Retinal Vein Occlusion (“RVO”).

Current report

Since our inception in September 2019, we have devoted substantially all of our resources to organizing and staffing, business planning, raising capital, acquiring technology, establishing our intellectual property portfolio and performing research and development of our product candidate. We do not have any products approved for sale and have not generated any revenue from product sales or otherwise. We have incurred significant losses and negative cash flows from operations since our inception. Our net losses were $43.4 million and $69.2 million for the years ended December 31, 2025 and 2024, respectively. Our negative cash flows from operations were $38.4 million and $20.7 million for the years ended December 31, 2025 and 2024, respectively. As of December 31, 2025, we had an accumulated deficit of $160.0 million. To date, we have funded our operations primarily from sales of our redeemable convertible preferred stock, issuances of convertible promissory notes and a simple agreement for future equity (“SAFE”), from cash and cash equivalents of AlloVir, Inc. (“AlloVir”) received in the Merger (as defined below), and from proceeds from the 2025 Private Placement (as defined below).

Current report

From inception through December 31, 2025, we have received gross proceeds of $67.5 million from sales of redeemable convertible preferred stock, issuances of convertible promissory notes and a SAFE, we received cash and cash equivalents of AlloVir of approximately $102.1 million in the Merger, and we received aggregate gross proceeds of $50.0 million from the 2025 Private Placement.

Current report

As of December 31, 2025, we had $118.0 million in cash, cash equivalents and short-term marketable securities. Based on our current operating plans, our management expects that our cash, cash equivalents and short-term marketable securities will be sufficient to fund our operating expenses and capital expenditure requirements into the fourth quarter of 2027. However, management has based these estimates on assumptions that may prove to be wrong, and our operating plans may change as a result of many factors currently unknown to us. In addition, changing circumstances could cause us to consume capital significantly faster than we currently anticipate, and we may need to spend more than currently expected because of circumstances beyond our control. As a result, we could deplete our capital resources sooner than we currently expect.

Current report

We expect to continue to incur substantial losses for the foreseeable future, including costs associated with operating as a public company. We do not expect to generate any revenue from commercial product sales unless and until we successfully complete development and obtain regulatory approval for our product candidate. Our ability to generate product revenue sufficient to achieve profitability will depend heavily on the successful development and eventual commercialization of our product candidate, which may never occur. We may never achieve or maintain profitability. Accordingly, we will need to obtain substantial additional funding in connection with our continuing operations.

Current report

We anticipate that our expenses will increase substantially if and as we:

Current report

conduct our ongoing Phase 1a and Phase 1b/2 clinical trials of TH103 in patients with nAMD;

Current report

continue to progress the development of TH103 in future preclinical studies and clinical trials;

Current report

advance any future product candidate that we may develop into preclinical and clinical development;

Current report

seek regulatory and marketing approvals for TH103 and any other product candidate that successfully completes clinical trials;

Current report

seek to identify and maintain additional collaborations and license agreements, and the success of those collaborations and license agreements;

Current report

make any payments under our existing or future strategic collaboration agreements, licensing agreements or sponsored research agreements, including with the University of California, San Diego (“UCSD”);

Current report

ultimately establish a sales, marketing and distribution infrastructure to commercialize any product candidate for which we may obtain marketing approval;

Current report

generate revenue from commercial sales of product candidates that may receive marketing approval;

Current report

in-license or acquire additional technologies or product candidates;

Current report

establish a commercial manufacturing source and secure supply chain capacity sufficient to provide commercial quantities of any product candidates we may develop for which we obtain regulatory approval; and

Current report

We do not currently own or operate any drug development or manufacturing facilities. We rely on Contract Development and Manufacturing Organizations (“CDMOs”) to help develop and produce TH103 in accordance with the U.S. Food and Drug Administration’s (“FDA”) current Good Manufacturing Practices regulations for use in our clinical trials. We use external contract research organizations (“CROs”) to conduct our preclinical studies and clinical trials.

Current report

Given our stage of development, we do not yet have a marketing or sales organization or commercial infrastructure. Accordingly, if we obtain regulatory approval for our product candidate, we also expect to incur significant commercialization expenses related to product sales, marketing, manufacturing and distribution.

Current report

Because of the numerous risks and uncertainties associated with product development, our management is unable to predict the timing or amount of increased expenses or when or if we will be able to achieve or maintain profitability, if at all. Even if we are able to generate revenue from the sale of our product candidate, we may not achieve or maintain profitability. If we fail to become profitable or are unable to sustain profitability on a continuing basis, we may be unable to continue our operations at planned levels and may be forced to reduce our operations.

Current report

The disruption and volatility in the global and domestic capital markets resulting from heightened inflation, current and potential tariffs and other trade restrictions, interest rate and currency rate fluctuations, disruptions at government agencies under the U.S. administration (such as workforce reductions or funding cuts), any potential economic slowdown or recession, including trade wars or civil or political unrest (such as the ongoing war between Ukraine and Russia, conflicts in the Middle East, and tension between China and Taiwan) may increase the cost of capital and limit our ability to access capital. These and similar adverse market conditions may negatively impact our business, financial position and results of operations.

Current report

Additionally, in April 2025, the U.S. administration initiated a series of tariff-related actions against U.S. trading partners. Although several countries have threatened or imposed retaliatory measures in response, the U.S. has reached agreements with a number of trading partners, and negotiations with others remain ongoing. Tariff-related actions are likely to remain a prominent part of U.S. economic policy for the foreseeable future, which may introduce uncertainty in international trade, including impacts to the costs of materials and production processes, supply chain stability, and other factors. While we have not experienced, and do not currently expect to experience, any direct impact from these tariffs and retaliatory measures, the full extent of the future impact of these and other threatened measures remains uncertain. We continue to monitor these tariffs and retaliatory measures and their possible effects on our business.

Current report

In October 2024, Kalaris Tx, Inc. (formerly, Kalaris Therapeutics, Inc.), a Delaware corporation (“Legacy Kalaris”) entered into a convertible note purchase agreement with Samsara BioCapital L.P. (“Samsara”) to issue to Samsara and other investors who subsequently joined the agreement up to $25.0 million of convertible promissory notes with a maturity date of May 31, 2025 (the “Convertible Note Financing”). In October and November 2024, Legacy Kalaris received $10.0 million from the initial closings of the Convertible Note Financing. Under the Merger Agreement (as defined below), Legacy Kalaris was permitted to issue additional convertible promissory notes pursuant to the Convertible Note Financing or otherwise to fund its operations prior to the closing of the Merger (as defined below) in an amount not to exceed $15.0 million in the aggregate on a to be converted post-money basis, with up to $7.5 million to be provided by AlloVir and up to $7.5 million to be provided by existing Legacy Kalaris stockholders (the “Additional Permitted Bridge Financing”). In January 2025, as part of the first tranche of the Additional Permitted Bridge Financing, Legacy Kalaris issued a convertible promissory note in an aggregate principal amount of up to $7.5 million to AlloVir (the “AlloVir Note”) under which AlloVir funded a principal amount of $3.75 million, and Legacy Kalaris issued convertible promissory notes in an aggregate principal amount of $3.75 million to existing Legacy Kalaris stockholders. No additional tranches of the convertible notes financing closed prior to the closing of the Merger. Immediately prior to the closing of the Merger, Legacy Kalaris’ outstanding convertible promissory notes held by its existing stockholders were converted into shares of Legacy Kalaris’ common stock or shares of Legacy Kalaris’ Series B-2 redeemable convertible preferred stock (“Series B-2 Preferred Stock”) that were then converted into shares of Legacy Kalaris’ common stock, which, at the effective time of the Merger, were converted into the right to receive shares of AlloVir’s common stock calculated in accordance with the Exchange Ratio (as defined below). Immediately prior to the closing of the Merger, Legacy Kalaris’ outstanding convertible promissory note issued to AlloVir was cancelled.

Current report

On March 18, 2025 (the “Closing Date”), AlloVir consummated the previously announced merger (the “Merger”) pursuant to the terms of the Agreement and Plan of Merger, dated as of November 7, 2024 (the “Merger Agreement”), by and among AlloVir, Aurora Merger Sub, Inc., a Delaware corporation and wholly-owned subsidiary of AlloVir (“Merger Sub”) and Legacy Kalaris.

Current report

In connection with the Merger, at the effective time of the Merger (the “Effective Time”), Merger Sub merged with and into Legacy Kalaris, with Legacy Kalaris continuing as a wholly-owned subsidiary of AlloVir and the surviving corporation of the Merger and, after giving effect to the Merger, Legacy Kalaris became a wholly-owned subsidiary of AlloVir, and immediately following the Effective Time, AlloVir changed its name to “Kalaris Therapeutics, Inc.” At the Effective Time, our business became primarily the business conducted by Legacy Kalaris.

Current report

Subject to the terms and conditions of the Merger Agreement, at the Effective Time, all issued and outstanding shares of Legacy Kalaris’ common stock (including common stock issued upon conversion of Legacy Kalaris’ preferred stock and outstanding convertible promissory notes) converted into the right to receive 0.2016 shares of AlloVir’s common stock calculated in accordance with an exchange ratio equal to 1:0.2016 (the “Exchange Ratio”). Each award of restricted shares of Legacy Kalaris’ common stock that was unvested and outstanding was converted into and exchanged for the right to receive a number of restricted shares of AlloVir common stock based on the Exchange Ratio. Each outstanding option to purchase shares of Legacy Kalaris’ common stock under Legacy Kalaris’ 2019 Equity Incentive Plan, whether or not vested, was converted into an option to acquire a number of shares of AlloVir’s common stock based on the Exchange Ratio. Exercise prices of assumed options were determined as the product of the exercise price immediately prior to the Effective Time multiplied by the reciprocal of the Exchange Ratio, and rounding up to the nearest whole cent. There were no changes to any other terms of such options or restricted share awards. Immediately following the

Current report

Merger, stockholders of Legacy Kalaris owned approximately 74.47% of the outstanding common stock of the combined company on a fully diluted basis. The Merger was accounted for as a reverse recapitalization in accordance with accounting principles generally accepted in the United States (“GAAP”). Under this method of accounting, Legacy Kalaris was deemed to be the accounting acquirer for financial reporting purposes. Accordingly, for accounting purposes, the Merger was treated as the equivalent of Legacy Kalaris issuing stock to acquire the net assets of AlloVir. As a result of the Merger, the net assets of AlloVir were recorded at their carrying value and our financial statements are consolidated after the Effective Time.

Current report

On December 17, 2025, we entered into a securities purchase agreement (the “2025 Securities Purchase Agreement”) with certain institutional investors named therein, pursuant to which, we issued and sold in a private placement (the “2025 Private Placement”), an aggregate of (i) 4,200,000 shares of our common stock at a purchase price of $10.00 per share, and (ii) pre-funded warrants (“Pre-Funded Warrants”) to purchase up to an aggregate of 800,000 shares of our common stock at a purchase price of $9.9999 per Pre-Funded Warrant, which represents the per share purchase price of our common stock less the $0.0001 per share exercise price for each Pre-Funded Warrant. The Pre-Funded Warrants are exercisable at any time after the date of issuance and will be exercisable until the Pre-Funded Warrant is exercised in full. In connection with the closing of the 2025 Private Placement, we received aggregate gross proceeds from the 2025 Private Placement of $50.0 million, before deducting placement agent fees and offering expenses.

Current report

License Agreement with the University of California, San Diego

Current report

In April 2021, we entered into a license agreement with UCSD (as amended, the “UCSD Agreement”) pursuant to which we obtained (i) an exclusive license under the patent rights to make, use, sell, offer for sale, and import licensed products and (ii) a non-exclusive license to use the technology with a right to sublicense, each (i) and (ii) related to new anti-VEGF agents and novel long-acting VEGF inhibitors for intraocular neovascularization for the treatment of patients with retinal pathologies. As partial consideration for the license, we agreed to pay UCSD $0.2 million and were obligated to issue shares of our common stock to UCSD equal to 5% of our fully diluted issued and outstanding securities until such time as an aggregate of $5.0 million in gross proceeds from the sale of equity securities had been raised by us. In June 2022, after the closing of the Series A financing, we issued 137,234 shares of our common stock to UCSD. We were also obligated to pay $0.1 million of patent costs incurred prior to the effective date and are required to reimburse future patent expenses incurred by UCSD during the term of the UCSD Agreement. Under the UCSD Agreement, we are required to make annual license maintenance payments of $10,000 during the first four anniversaries and $15,000 on the fifth and every subsequent anniversary of the effective date. We are obligated to pay an aggregate of up to $4.6 million upon the achievement of various development and regulatory milestones and low single-digit royalties on net sales of licensed products. The royalty is payable, on a licensed product-by-licensed product and country-by country basis, until expiration of the last-to-expire issued patent of the applicable licensed product in the country of sale or the manufacture. If we enter into a sublicensing agreement, we are required to pay UCSD a sublicense fee as a percentage of the fair market value of any sublicense fee received that is not earned royalties for each sublicense granted. The sublicense fee percentage ranges from 50% if the applicable sublicense agreement is entered into within one year from the UCSD Agreement effective date and decreases to 10% if the applicable sublicense agreement is entered into after the first dosing of a patient for a phase 2 clinical trial.

Current report

In case of a closing of a merger, or sale of at least 50% of our voting stock or the sale by us of all or substantially all of our assets (collectively referred to as “Liquidity Event”), we are obligated to make a one-time cash milestone payment to UCSD ranging from $0.1 million to $1.0 million based on the valuation of our outstanding shares at the Liquidity Event closing date. The Merger did not meet the definition of the Liquidity Event.

Current report

The UCSD Agreement is effective until the expiration date of the longest-lived patent rights or last to be abandoned patent or future patent of the licensed products, whichever is later. We can terminate the agreement upon 60 days written notice. UCSD can terminate the agreement in the event of an uncured material breach, such as a failure to make payments due, or to perform or a violation of any other material term of the UCSD Agreement, is not cured by us within 60 days after a breach written notice provided by UCSD.

Current report

The acquisition of the license under the UCSD Agreement, including patent rights and know-how, was accounted for as an asset acquisition. As the acquired technology did not have an alternative future use, we recognized the $0.2 million initial cash consideration, $0.1 million patent reimbursement costs incurred prior to the effective date and $0.2 million related to the obligation to issue shares of our common stock as research and development expenses. The obligation to issue shares of common stock included two components, the initial shares obligation and the additional shares obligation. The fair value of the initial shares obligation was estimated as $0.1 million based on the fair value of 55,440 shares of common stock, which represented 5% of the outstanding fully diluted equity at the effective date. As the initial share obligation was indexed to our own stock, it was recorded as additional paid-in capital. The additional shares obligation was accounted for when the next round of financing closed in March 2022. We estimated the fair value of an additional 81,794 shares of common stock as $0.2 million and recognized it as research and development expenses and additional paid-in capital in March 2022.

Current report

We recognized $0.2 million and $0.1 million in patent reimbursement costs for the years ended December 31, 2025 and 2024, respectively. We made a payment of $0.1 million in connection with our achievement of the first development milestone related to the dosing of the first patient in our Phase 1a clinical trial in August 2024, which was recorded as research and development expense in the consolidated statement of operations and comprehensive loss for the year ended December 31, 2024. No other milestones were achieved or probable through December 31, 2025. No milestone expense was recorded for the year ended December 31, 2025.

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Removed paragraphs (116)

Previous report

Unless otherwise indicated, all information in this Annual Report on Form 10-K gives effect to a 1-for-23 reverse stock split of our common stock that became effective on January 15, 2025, and all references to historical share and per share amounts give effect to the reverse stock split.

Previous report

We are a biopharmaceutical company. Our initial focus was on developing highly innovative allogeneic T cell therapies to treat and prevent devastating viral diseases. Our innovative and proprietary VST therapy platform allows us to generate off-the-shelf VSTs designed to restore immunity in patients with T cell deficiencies who are at risk from the life-threatening consequences of viral diseases. This included: (1) posoleucel (ALVR105), an investigational off-the-shelf multi-virus-specific T cell therapy, which targeted six viral pathogens in immunocompromised individuals: AdV, BKV, CMV, EBV, HHV-6 and JCV; (2) ALVR106, an allogeneic, off-the-shelf VST therapy candidate developed to target devastating diseases caused by four respiratory viruses: hMPV, PIV and RSV; and (3) ALVR107, an allogeneic, off-the-shelf VST therapy candidate designed to target HBV-infected cells with the aim of curing chronic HBV infections.

Previous report

On December 22, 2023, we announced the discontinuation of three Phase 3 registrational trials of posoleucel following separate, pre-planned DSMB, futility analyses that concluded the studies were unlikely to meet their primary endpoints. Specifically, we discontinued a multicenter, randomized, double-blind, placebo-controlled Phase 3 trial comparing posoleucel to placebo for the prevention of infection or disease due to AdV, BKV, CMV, EBV, HHV-6, or JCV in high-risk adult and pediatric patients after undergoing an allogeneic hematopoietic stem cell transplant. We also discontinued two multicenter, randomized, double-blind, placebo-controlled Phase 3 trials of posoleucel – one for the treatment of virus-associated hemorrhagic cystitis and the second for the treatment of adenovirus infection – both after allogeneic hematopoietic cell transplant. At this time, we do not intend to resume development of posoleucel or any other product candidates. On December 22, 2023, we announced the decision to conduct a comprehensive review of strategic alternatives focused on maximizing shareholder value. We also engaged Leerink Partners as its exclusive strategic financial advisor to assist in the process of exploring strategic alternatives, including the merger with Kalaris.

Previous report

In connection with the evaluation of strategic alternatives to maximize capital preservation, we have implemented a plan to reduce our workforce by approximately 95%. This workforce reduction plan was approved in January 2024, took place primarily during the first quarter of 2024 and was substantially completed by April 15, 2024.

Previous report

On November 7, 2024, we, Kalaris and Merger Sub entered into the Merger Agreement, which contains the terms and conditions of the proposed merger. Pursuant to the Merger Agreement, among other matters, and subject to the satisfaction or waiver of the conditions set forth in the Merger Agreement, at the effective time of the Merger (as defined below), Merger Sub will merge with and into Kalaris, with Kalaris surviving as a wholly-owned subsidiary of us. We are expected to change our name to “Kalaris Therapeutics, Inc.” and continue to be listed on The Nasdaq Capital Market, but trade under the ticker symbol “KLRS”.

Previous report

The merger is expected to close in the first quarter of 2025, subject to the satisfaction or waiver of various conditions, by each of the parties, at or prior to the closing of the merger, including, among other things, (i) the approval by AlloVir stockholders of (a) the issuance of shares of AlloVir common stock, which represent more than 20% of the shares of AlloVir common stock outstanding immediately prior to the merger, to Kalaris stockholders pursuant to the terms of the merger Agreement and pursuant to Nasdaq Listing Rule 5635(a) and (b) the change of control of AlloVir resulting from the merger, (ii) the adoption of the merger agreement by the requisite Kalaris stockholders, (iii) AlloVir’s net cash at the closing of the merger being no less than $95.0 million and (iv) other customary closing conditions. The merger was unanimously approved by the AlloVir board of directors. AlloVir is holding a special meeting of its stockholders on March 12, 2025, at 9:00 AM Eastern Time unless postponed or adjourned to a later date, in order to obtain the stockholder approvals necessary to complete the merger and related matters. If the merger is completed, the business of Kalaris will continue as the business of the combined company.

Previous report

At the effective time of the merger, each issued and outstanding share of Kalaris common stock will be converted into the right to receive a certain number of shares of AlloVir common stock based on an exchange ratio (the “exchange ratio”). Under the exchange ratio formula in the merger agreement, upon closing of the merger, [on a pro forma basis and based upon the number of shares of AlloVir common stock expected to be issued in the merger,] it is expected that pre-merger Kalaris stockholders will own approximately 75.34% of the combined company and pre-merger AlloVir stockholders will own approximately 24.66% of the combined company, in each case, on a fully-diluted basis (excluding any shares reserved for future equity awards). Under certain circumstances, the ownership percentages may be adjusted upward or downward based on the level of AlloVir’s net cash at the closing of the merger.

Previous report

The exchange ratio, and related pro forma ownership, assumes (a) a valuation of AlloVir of $116.0 million, which is subject to adjustment to the extent that AlloVir’s net cash at closing of the merger is above or below $100.0 million by more than $1.0 million (provided that AlloVir’s net cash at closing of the merger shall be no less than $95.0 million), in which case AlloVir’s valuation will be adjusted on a dollar-for-dollar basis by the difference of (i) its net cash at closing of the merger and (ii) $100.0 million, and (b) a valuation for Kalaris of $347.0 million.

Previous report

Pursuant to the merger agreement, Kalaris is permitted to enter into the Additional Permitted Bridge Financing. On January 10, 2025, as a part of the first tranche of the Additional Permitted Bridge Financing, Kalaris issued the AlloVir Note under which we funded a principal amount of $3.75 million, and Kalaris issued convertible promissory notes in an aggregate principal amount of $3.75 million to existing Kalaris stockholders. Prior to the closing of the merger, Kalaris has the opportunity to receive an additional $7.5 million in the second tranche of the Additional Permitted Financing of which $3.75 million would be provided by existing Kalaris stockholders and the remaining $3.75 million would be provided by us. However, Kalaris no longer expects the second tranche of the Additional Permitted Financing to be funded. Upon the closing of the merger, the AlloVir Note will be cancelled and the aggregate amount outstanding under the AlloVir Note will be added to our net cash.

Previous report

If we are unable to satisfy certain closing conditions to the merger agreement or if other mutual closing conditions to the merger agreement are not satisfied, Kalaris will not be obligated to complete the merger. If the merger agreement is terminated under specified circumstances, we could be required to pay Kalaris a termination fee of $3.48 million or Kalaris could be required to pay us a termination fee of $10.41 million. In addition, in certain circumstances upon the termination of the merger agreement, we could be required to pay the reasonable costs and expenses of Kalaris in an amount not to exceed $580,000, or Kalaris could be required to pay our reasonable costs and expenses in an amount not to exceed $580,000.

Previous report

We and Kalaris believe that combining the two companies will result in a combined company with promising science, a strong leadership team and substantial capital resources, positioning it to become a biopharmaceutical company focused on developing Kalaris’ lead product candidate, TH103.

Previous report

We expect to devote significant time and resources to the completion of the Merger. If the Merger is not completed, we will reconsider our strategic alternatives and may pursue one of the following courses of action, which we currently believe are the most likely alternatives if the Merger is not completed:

Previous report

Pursue another strategic transaction similar to the Merger. We may resume our process of evaluating other candidate companies interested in pursuing a strategic transaction and, if a candidate is identified, focus its attention on negotiating and completing such a strategic transaction with such candidate.

Previous report

Continue to operate our business. We could elect to continue to operate its business and pursue licensing or partnering transactions. To continue to operate our business, we would require a significant amount of time and financial resources, and we would be subject to all the risks and uncertainties involved in the development of product candidates. There is no assurance that we could raise sufficient capital to support these efforts, that its development efforts would be successful or that it could successfully obtain the regulatory approvals required to market any product candidate it pursued.

Previous report

Dissolve and liquidate our assets. If we are unable, or do not believe we are able, to find a suitable candidate for another strategic transaction, we may dissolve and liquidate our assets. In that event, we would be required to pay all of our debts and contractual obligations and to set aside certain reserves for commitments and contingent liabilities. If we dissolve and liquidate our assets, there can be no assurance as to the amount or timing of available cash that will remain for distribution to our stockholders after paying our debts and other obligations and setting aside funds for commitments and contingent liabilities.

Previous report

Our pipeline includes additional investigational VST therapies that may benefit high-risk individuals. ALVR106 is our second off-the-shelf, multi-VST product candidate that targets devastating respiratory diseases caused by hMPV, influenza, PIV and RSV. A Phase 1b/2 POC clinical study of ALVR106 has completed enrollment of patients in Part A of the trial. We have stopped development of ALVR106, including discontinuing the trial pending the outcome of our review of strategic alternatives. ALVR107 is our preclinical stage product candidate designed to target HBV-infected cells and with the aim of curing chronic HBV infections. Preclinical and IND enabling studies of ALVR107 to treat and cure hepatitis B were completed in 2022 to support advancement into a POC study. We have stopped clinical development of ALVR107 pending the outcome of our review of strategic alternatives.

Previous report

Since inception, we have devoted substantially all of our resources on raising capital, organizing and staffing our company, business planning, conducting discovery and research activities, acquiring or discovering product candidates, establishing and protecting our intellectual property portfolio, developing and progressing posoleucel, ALVR106, ALVR107, and other product candidates and preparing for clinical trials and establishing arrangements with third parties for the manufacture of our product candidates and component materials. We do not have any product candidates approved for sale and have not generated any revenue from product sales.

Previous report

On August 3, 2020, we completed an initial public offering (“IPO”), of our common stock and issued and sold 812,500 shares of our common stock at a public offering price of $391.00 per share, resulting in net proceeds of $292.0 million after deducting underwriting discounts and commissions and offering costs. Prior to our IPO, we funded our operations through equity financings and received proceeds of $156.3 million, net of offering costs of $0.6 million, from the sale of our preferred stock.

Previous report

On July 26, 2022, we entered into a Securities Purchase Agreement (“Securities Purchase Agreement”), with certain investors for the issuance and sale of 1,193,830 shares of our common stock for aggregate net proceeds of $126.4 million.

Previous report

On June 21, 2023, we entered into an underwriting agreement with J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC and BoFA Securities, Inc., as the representatives of the several underwriters (“Underwriters”), relating to an underwritten public offering of 869,565 shares of our common stock at a public offering price of $86.25 per share, resulting in net proceeds of $70.2 million after deducting underwriting discounts, commissions and offering costs.

Previous report

On August 6, 2021, we filed an automatically effective registration statement on Form S-3 (“Registration Statement”), with the SEC which registered the offering, issuance and sale of an unspecified amount of common stock, preferred stock, debt securities, warrants and/or units of any combination thereof. We simultaneously entered into a sales agreement with SVB Leerink LLC, as sales agent, to provide for the issuance and sale of up to $100.0 million of our common stock from time to time in “at-the-market” offerings under the Registration Statement and related prospectus filed with the Registration Statement (“ATM Program”). On February 10, 2022 we filed a Post-Effective Amendment No. 2 to the Registration Statement and on February 18, 2022 we filed Post-Effective Amendment No. 3 to the Registration Statement. On June 21, 2023, we suspended our use of and terminated the prospectus supplement under the ATM Program. We will not make any sales under the ATM Program unless and until a new prospectus supplement or a new registration statement is filed. Other than the termination of the prospectus supplement, the sales agreement remains in full force and effect. As of December 31, 2024, no sales had been made pursuant to the ATM Program.

Previous report

We have incurred significant operating losses since inception, including net losses of $58.8 million and $190.4 million for the years ended December 31, 2024 and 2023, respectively. At December 31, 2024, we had an accumulated deficit of $715.0 million.

Previous report

These losses have resulted primarily from costs incurred in connection with research and development activities and general and administrative costs associated with our operations. We expect losses to decrease in the foreseeable future due to our workforce reduction plan and discontinuation of our clinical trials. We expect to continue to incur costs and expenditures in connection with the Merger and we will continue to incur costs associated with operating as a public company. There can be no assurance, however, that we will be able to successfully consummate the Merger. The Merger has been and may continue to be costly, time-consuming and complex, and we may incur significant costs related to the Merger, such as legal, accounting and advisory fees and expenses and other related charges. A considerable portion of these costs will be incurred regardless of whether the Merger is implemented or completed. Any such expenses will decrease the remaining cash available for use in our business. In addition, any strategic business combination or other transactions that we may consummate in the future, could have a variety of negative consequences and we may implement a course of action or consummate a transaction that yields unexpected results that adversely affects our business and decreases the remaining cash available for use in our business or the execution of our strategic plan. There can be no assurances that any particular course of action, business arrangement, transaction, or series of transactions, will be pursued, successfully consummated, lead to increased stockholder value or achieve the anticipated results. Any failure of such potential transaction to achieve the anticipated results could significantly impair our ability to enter into any future strategic transactions and may significantly diminish or delay any future distributions to our stockholders.

Previous report

Should we resume the development of product candidates, we expect to continue to incur significant and increasing expenses and operating losses for the foreseeable future, particularly if and as we:

Previous report

continue to discover and develop additional product candidates;

Previous report

expand our manufacturing capabilities with third parties and establish manufacturing capabilities in-house;

Previous report

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

Previous report

Should we resume the development of product candidates, we will need substantial additional funding to support our continuing operations and pursue our growth strategy. Until such time as we can generate significant revenue from product sales, if ever, we expect to finance our operations through the sale of equity, debt financings or other capital sources, including potential collaborations with other companies or other strategic transactions. Our inability to raise capital as and when needed could have a negative impact on our financial condition and ability to pursue our business strategies. There can be no assurances, however, that the current operating plan will be achieved or that additional funding will be available on terms acceptable to us, or at all.

Previous report

At December 31, 2024, we had cash and cash equivalents of $118.3 million. Based on current projections, we believe that our existing cash and cash equivalents will enable us to fund our operating expenses and capital expenditure requirements through at least twelve months following the issuance of these financial statements. We have based this estimate on assumptions that may prove to be wrong, and we could exhaust our available capital resources sooner than we expect. However, due to the discontinuation of our clinical trials and research activities, as well as our workforce reduction, management has concluded that there is a substantial doubt regarding our ability to continue as a going concern for more than twelve months after the date the consolidated financial statements are issued. See “—Liquidity and Capital Resources.”

Previous report

Should we resume the development of product candidates, the development of our product candidates could be disrupted and materially adversely affected in the future by a pandemic, epidemic or outbreak of an infectious disease, such as the COVID-19 pandemic. The spread of COVID-19 impacted the global economy and our operations, including the interruption of our preclinical and clinical trial activities and potential interruption to our supply chain. For example, the COVID-19 pandemic delayed clinical trials. Although the immediate impacts of COVID-19 have receded, if the disruption due to COVID-19 resurges, our planned pivotal clinical trials also could be delayed due to government orders and site policies on account of a pandemic like the COVID-19 pandemic, and some patients may be unwilling or unable to travel to study sites, enroll in our trials or be unable to comply with clinical trial protocols if quarantines impede patient movement or interrupt healthcare services, which would delay our ability to conduct preclinical studies and clinical trials or release clinical trial results and could delay our ability to obtain regulatory approval and commercialize our product candidates. Furthermore, a pandemic like COVID-19 could affect our employees or the employees of research sites and service providers on whom we rely, including CROs, as well as those of companies with which we do business, including our suppliers and CMOs, thereby disrupting our business operations.

Previous report

We cannot presently predict the scope of any potential business shutdowns or disruptions, but if we or any of the third parties on whom we rely or with whom we conduct business, were to experience shutdowns or other business disruptions, our ability to conduct our business in the manner and on the timelines presently planned could be materially and adversely impacted.

Previous report

On September 17, 2018, we entered into a Series A2 Preferred Stock Purchase Agreement, or the Series A2 Agreement, with ElevateBio, LLC, or ElevateBio, and ElevateBio was a purchaser in our registered direct offering in July 2022. ElevateBio, through its diverse platform of technologies to support cell and gene therapy products and expertise, provides drug development and manufacturing services. As a result of ElevateBio’s purchase of our Series A2 Preferred Stock, which converted to common stock upon completion of our IPO, and as a result of ElevateBio’s participation in the July 2022 registered direct offering, ElevateBio acquired an ownership interest in our Company. In May 2021, Diana M. Brainard, M.D., succeeded David Hallal, ElevateBio’s Chief Executive Officer, as our Chief Executive Officer. Mr. Hallal currently serves as Executive Chairman of our board of directors. Vikas Sinha, our President and Chief Financial Officer, also serves as the Chief Financial Officer of ElevateBio. In addition to Mr. Hallal and Mr. Sinha, Morana Jovan-Embiricos, a director of our board of directors, also serves as a director of the board of directors of ElevateBio.

Previous report

Research and development expenses consist primarily of costs incurred in connection with our research and development activities, including our drug discovery efforts and the development of our product candidates. We expense research and development costs as incurred, which include:

Previous report

costs related to manufacturing material for our clinical trials, including fees paid to CMOs;

Previous report

manufacturing scale-up expenses and the cost of acquiring and manufacturing clinical trial materials;

Previous report

employee-related expenses, including salaries, bonuses, benefits, stock-based compensation and other related costs for those employees involved in research and development efforts;

Previous report

costs of outside consultants, including their fees, stock-based compensation and related travel expenses;

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Previous wording

You should read the following discussion and analysis of our financial condition and results of operations together with our consolidated financial statements and related notes appearing elsewhere in this Annual Report on Form 10-K. This discussion and other parts of this Annual Report on Form 10-K contain forward-looking statements that involve risks and uncertainties, such as statements of our plans, objectives, expectations and intentions. As a result of many factors, including those factors set forth in the “Risk Factors” section of this Annual Report on Form 10-K, our actual results could differ materially from the results described in or implied by the forward-looking statements contained in the following discussion and analysis.

Current wording

You should read the following discussion and analysis of our financial condition and results of operations together with our consolidated financial statements and related notes thereto appearing elsewhere in this Annual Report. This Annual Report contains forward-looking statements that involve risks and uncertainties, such as our plans, objectives, expectations, intentions, and beliefs. There are a number of important risks and uncertainties that could cause our actual results to differ materially from those discussed in these forward-looking statements. We may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, and you should not place undue reliance on our forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements we make. Factors that could cause or contribute to such differences include, but are not limited to, those identified below and those discussed in the section titled “Risk Factors” under Part I, Item 1A of this Annual Report and those discussed in our other disclosures and filings. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments that we may make. All historical common share data and per-share amounts prior to the Merger (as defined below) have been retrospectively adjusted to reflect the exchange ratio of 0.2016 per one share, which was determined in accordance with the Merger Agreement (as defined below).

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maintain, expand, and protect our intellectual property portfolio;

Current wording

maintain, expand, enforce and protect our intellectual property portfolio;

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hire additional clinical, regulatory, manufacturing, quality control, development and scientific personnel;

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

Current wording

add operational, financial and management information systems and personnel, including personnel to support our product development and planned future commercialization efforts and our operations as a public company.

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external research and development expenses incurred under agreements with CROs, as well as investigative sites and consultants that conduct our clinical trials and other scientific development services;

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commercializing product candidates, if and when approved, whether alone or in collaboration with others; and

Current wording

We expect our research and development expenses to increase substantially for the foreseeable future as we advance our product candidate through clinical trials, pursue regulatory approval of our product candidate and expand the indications for our product candidate. The process of conducting the necessary preclinical and clinical research to obtain regulatory approval is costly and time-consuming. The actual probability of success for our product candidate may be affected by a variety of factors, including the timing and progress of clinical development activities, our ability to successfully complete clinical trials with safety, potency and purity profiles that are satisfactory to the FDA or any comparable foreign regulatory authority, our ability to successfully develop, obtain regulatory approval for, and then successfully commercialize, our product candidate; our ability to establish and maintain agreements with third-party manufacturers for clinical supply for our clinical trials and commercial manufacturing, if our product candidate is approved; the terms and timing of any collaboration, license or other arrangement, including the terms and timing of any milestone payments thereunder; our ability to obtain and maintain patent, trade secret and other intellectual property protection and our ability to commercialize products, if and when approved, whether alone or in collaboration with others. We may never receive regulatory approval for our product candidate. As a result of the uncertainties discussed above, our management is unable to determine the duration and completion costs of our research and development activities or if, when and to what extent we will generate revenue from the commercialization and sale of our product candidate, if approved.

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initiate and conduct additional preclinical studies and clinical trials for our product candidates;

Current wording

the timing, scope, progress and results of our preclinical studies and clinical trials for our current and future product candidates;

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the extent to which we in-license or acquire rights to other products, product candidates or technologies;

Current wording

the extent to which we acquire or in-license other product candidates and technologies;

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subject to receipt of regulatory approval, revenue, if any, received from commercial sales of posoleucel for any approved indications or ALVR106 or any other product candidates;

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the amount of revenue, if any, received from commercial sales of TH103 or any future product candidates, should any product candidates receive marketing approval;

Previous wording

Until such time, if ever, as we can generate substantial product revenues to support our cost structure, we expect to finance our cash needs through a combination of equity offerings, debt financings, collaborations and other similar arrangements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interest of our shareholders will be or could be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our common shareholders. Debt financing and equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise funds through collaborations, or other similar arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us and/or may reduce the value of our common stock. If we resume the development of our product candidates and are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market our product candidates even if we would otherwise prefer to develop and market such product candidates ourselves.

Current wording

Until such time as we can generate significant revenue from product sales, if ever, we expect to finance our operations through a combination of public or private equity offerings or debt financings, or potentially other capital sources, such as collaboration or licensing arrangements with third parties or other strategic transactions. There are no assurances that we will be successful in obtaining an adequate level of financing to support our business plans when needed on acceptable terms, or at all. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interest of our stockholders could be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our common stockholders. Debt financing and equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise additional funds through collaboration or licensing arrangements with third parties or other strategic transactions, we may have to relinquish rights to our intellectual property, future revenue streams, research programs, or product candidates, or we may have to grant licenses on terms that may not be favorable to us. If we are unable to raise capital as and when needed or on attractive terms, or at all, we may have to significantly delay, reduce or discontinue the development or future commercialization of TH103 or any future product candidate.

Previous wording

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

Current wording

The following table summarizes primary sources and uses of cash for the periods presented (in thousands):

Previous wording

Net cash used in operating activities was $67.7 million for the year ended December 31, 2024, reflecting a net loss of $58.8 million and a decrease in our net operating assets and liabilities of $25.3 million, partially offset by non-cash charges of $16.4 million. The change in net operating assets and liabilities was due to a decrease of $29.9 million in accounts payable, accrued expenses and other liabilities due in large part to the termination of our leases in 2024, offset by a decrease of $3.2 million in prepaid expenses and other current assets. Non-cash charges primarily consist of stock-based compensation expense of $26.3 million offset by a gain on lease termination and remeasurement of $8.9 million.

Current wording

Cash used in operating activities for the year ended December 31, 2025, was primarily due to a net loss of $43.4 million, offset by non-cash charges of $1.6 million and further offset by net changes of $3.4 million in net operating assets and liabilities. Non-cash charges primarily consist of $1.9 million in stock-based compensation expense and 1.4 million in non-cash interest expense, offset by a gain of $1.2 million related to the change in fair value of derivative liabilities and a gain of $0.4 million related to the change in fair value of tranche liability. The favorable net change in net operating assets and liabilities was primarily due to a decrease in prepaid expenses and other current assets of $1.8 million, of which $1.7 million relates to the Merger, and an increase in accrued expenses and other current liabilities of $2.1 million, net of $2.6 million relating to the Merger and $1.7 million relating to unpaid issuance costs for the 2025 Private Placement.

Previous wording

A description of recently issued accounting pronouncements that may potentially impact our financial position and results of operations are disclosed in Note 2 to our consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K.

Current wording

A description of recently issued accounting pronouncements that may potentially impact the financial position, results of operations or cash flows is disclosed in Note 2 to our consolidated financial statements included elsewhere in this Annual Report.

Previous wording

Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP). The preparation of our consolidated financial statements and related disclosures requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, costs and expenses, and the disclosure of contingent assets and liabilities in our consolidated financial statements. We base our estimates on historical experience, known trends and events and various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. We evaluate our estimates and assumptions on an ongoing basis. Our actual results may differ from these estimates under different assumptions or conditions.

Current wording

Our management’s discussion and analysis of financial condition and results of operations is based on our financial statements, which have been prepared in accordance with GAAP. The preparation of these financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported expenses incurred during the reporting periods. On an ongoing basis, management evaluates these estimates and judgments, including, but not limited to, those related to the accrual of research and development expenses, the fair value of royalty obligation, the fair value of convertible promissory notes, the fair value of tranche liability, the fair value of derivative liabilities, the fair value of common stock and preferred stock, and stock-based compensation. These estimates and assumptions are monitored and analyzed by management for changes in facts and circumstances, and material changes in these estimates and assumptions could occur in the future. Our management's estimates are based on our historical experience and on various other factors that management believes 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. Changes in estimates are reflected in reported results for the period in which they become known. Actual results may differ from these estimates under different assumptions or conditions.

Previous wording

While our significant accounting policies are described in more detail in Note 2 to our audited consolidated financial statements appearing elsewhere in this report, we believe that the following accounting policies are those most critical to the judgments and estimates used in the preparation of our consolidated financial statements.

Current wording

Although significant accounting policies are described in more detail in Note 2 to our consolidated financial statements included elsewhere in this Annual Report, we believe that the following accounting estimates are those most critical to the judgments and estimates used in the preparation of our consolidated financial statements.

Current wording

We estimate manufacturing and product development costs, preclinical study and clinical trial and other research and development expenses based on the services performed. We have entered into various agreements with outsourced vendors, contract development and manufacturing organizations and clinical research organizations. The financial terms of these contracts are subject to negotiation, which vary by contract and may result in payments that do not match the periods over which materials or services are provided. Generally, these agreements set forth the scope of work to be performed at a fixed fee, unit price or on a time and materials basis. We record the estimated costs of research and development activities based on the level of services performed, the progress of the studies, including the phase or completion of events, and contracted costs. The estimated costs of research and development services provided, but not yet invoiced, are included in accrued expenses on the balance sheets. Advance payments for goods or services for future research and development activities are deferred as prepaid expenses and are expensed as the goods are delivered or the related services are performed. We make these estimates based on facts and circumstances known at that time. If the actual timing of the performance of services or the level of effort varies from the original estimates, we will adjust the accrual accordingly. Amounts ultimately incurred in relation to amounts accrued for these services at a reporting date may be substantially higher or lower than our estimates. To date, there have been no material differences between estimates of such expenses and the amounts actually incurred.

Previous wording

We are also a “smaller reporting company” meaning that the market value of our stock held by non-affiliates is less than $700 million and our annual revenue was less than $100 million during the most recently completed fiscal year. We may continue to be a smaller reporting company if either (i) the market value of our stock held by non-affiliates is less than $250 million or (ii) our annual revenue was less than $100 million during the most recently completed fiscal year and the market value of our stock held by non-affiliates is less than $700 million. If we are a smaller reporting company at the time we cease to be an emerging growth company, we may continue to rely on exemptions from certain disclosure requirements that are available to smaller reporting companies. Specifically, as a smaller reporting company we may choose to present only the two most recent fiscal years of audited financial statements in this Annual Report on Form 10-K and, similar to emerging growth companies, smaller reporting companies have reduced disclosure obligations regarding executive compensation.

Current wording

We are a “smaller reporting company” because the market value of our common stock held by non-affiliates was less than $700.0 million and our annual revenue was less than $100.0 million during the most recently completed fiscal year. We may continue to be a smaller reporting company if either (i) the market value of its stock held by non-affiliates is less than $250.0 million or (ii) its annual revenue was less than $100.0 million during the most recently completed fiscal year and the market value of its stock held by non-affiliates is less than $700.0 million.
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Previous report — wording carried elsewhere

acquire or in-license other product candidates and technologies;