Note 9. Commitments and Contingencies

Other Liabilities

The $43.6 million balance recorded in other liabilities is conditional, and will only be due and payable, upon the Company achieving a qualifying “Revenue” event, as defined below. The Company has agreed to pay 20% of its qualifying Revenue generated in each calendar year, if any, with such payments to be applied to reduce the balance until it is repaid in full. Interest will not accrue on the balance throughout the prospective repayment period. Revenue is defined as:

“…the gross revenue generated by Client and its Affiliates, less the following items (if not previously deducted from the amount invoiced): (a) reasonable and customary trade, quantity, and cash discounts actually granted and legally permitted wholesaler chargebacks actually paid or credited by Client and its Affiliates to wholesalers of products; (b) reasonable, customary, and legally permitted rebates and retroactive price reductions actually granted; (c) freight charges for the delivery of products; (d) the portion of the administrative fees paid during the relevant time period to group purchasing organizations, pharmaceutical benefit managers and/or government-mandated Medicare or Medicaid Prescription Drug Plans relating specifically to the product; and (e) sales, use or excise taxes imposed and actually paid in connection with the sale of products (but excluding any value added taxes or taxes based on income or gross receipts).”

Operating lease commitments

The Company leases its principal office location in Vancouver, Washington (the “Vancouver Lease”). The Vancouver Lease expires on April 30, 2026. Consistent with the guidance in ASC 842, Leases, the Company has recorded this lease in its consolidated balance sheet as an operating lease. For the purpose of determining the right of use asset and associated lease liability, we determined that the renewal of the Vancouver lease was not reasonably probable. The lease does not include any restrictions or covenants requiring special treatment under ASC 842, Leases. Operating lease costs for the three months ended August 31, 2025 and August 31, 2024 were approximately $31.0 thousand and $32.0 thousand, respectively. Operating lease right-of-use assets are included in other non-current assets and the current portion of operating lease liabilities are included in accrued liabilities and compensation on the consolidated balance sheets. The following table summarizes the operating lease balances:

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The minimum (base rental) lease payments are expected to be as follows as of August 31, 2025 (in thousands):

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Supplemental information related to operating leases was as follows:

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PRO 140 Acquisition and Licensing Arrangements

Refer to Note 9, Commitments and Contingencies, in the 2025 Form 10-K for additional information.

Legal proceedings

As of August 31, 2025, the Company did not record any accruals related to the outcomes of the legal matters described below. It is not possible to determine the outcome of these proceedings, including the defense and other litigation-related costs and expenses that may be incurred by the Company, as the outcomes of legal proceedings are inherently uncertain. Therefore, it is possible that the ultimate outcome of any proceeding, if in excess of a recognized accrual, if any, could be material to the Company’s consolidated financial statements.

Conclusion of Investigations by Securities and Exchange Commission and Department of Justice

In September 2025, the Securities and Exchange Commission (“SEC”) and Department of Justice (“DOJ”) informed the Company that their respective investigations were effectively closed, and that nothing further was required of the Company.

Securities Class Action Lawsuits

On March 17, 2021, a stockholder filed a putative class-action lawsuit (the “March 17, 2021 lawsuit”) in the U.S. District Court for the Western District of Washington against the Company and certain former officers. The complaint generally alleges the defendants made false and misleading statements regarding the viability of leronlimab as a potential treatment for COVID-19. On April 9, 2021, a second stockholder filed a similar putative class action lawsuit in the same court, which the plaintiff voluntarily dismissed without prejudice on July 23, 2021. On August 9, 2021, the court appointed lead plaintiffs for the March 17, 2021 lawsuit. On December 21, 2021, lead plaintiffs filed an amended complaint, which is brought on behalf of an alleged class of those who purchased the Company’s common stock between March 27, 2020 and May 17, 2021. The amended complaint generally alleges that the defendants violated Sections 10(b) and/or 20(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and Rule 10b-5 promulgated thereunder by making purportedly false or misleading statements concerning, among other things, the safety and efficacy of leronlimab as a potential treatment for COVID-19, the Company’s CD10 and CD12 clinical trials, and its human immunodeficiency virus (“HIV”) Biologic License Application (“BLA”). The amended complaint also alleges that the individual defendants violated Section 20A of the Exchange Act by selling shares of the Company’s common stock purportedly while in possession of material nonpublic information. The amended complaint seeks, among other relief, a ruling that the case may proceed as a class action and unspecified damages and attorneys’ fees and costs. On February 25, 2022, the defendants filed a motion to dismiss the amended complaint. On June 24, 2022, lead plaintiffs filed a second amended complaint. The second amended complaint is brought on behalf of an alleged class of those who purchased the Company’s common stock between March 27, 2020 and March 30, 2022, makes similar allegations, names the same defendants, and asserts the same claims as the prior complaint, adds a claim for alleged violation

of Section 10(b) of the Exchange Act and Rule 10b-5(a) and (c) promulgated thereunder, and seeks the same relief as the prior complaint. All defendants filed motions to dismiss the second amended complaint in whole or in part.

The Company and the individual defendants deny all allegations of wrongdoing in the complaint and intend to vigorously defend the matter. Since this case is in an early stage where the number of plaintiffs is not known, and the claims do not specify an amount of damages, the Company is unable to predict the ultimate outcome of the lawsuit and cannot reasonably estimate the potential loss or range of loss the Company may incur.

Shareholder Derivative Lawsuits

On June 4, 2021, a stockholder filed a purported derivative lawsuit against certain of the Company’s former officers and directors, and the Company as a nominal defendant, in the U.S. District Court for the Western District of Washington. Two additional shareholder derivative lawsuits were filed against the same defendants in the same court on June 25, 2021 and August 18, 2021, respectively. The court has consolidated these three lawsuits for all purposes (“Consolidated Derivative Suit”). On January 20, 2022, the plaintiffs filed a consolidated complaint. The consolidated complaint generally alleges that the director defendants breached their fiduciary duties by allowing the Company to make false and misleading statements regarding, among other things, the safety and efficacy of leronlimab as a potential treatment for COVID-19, the Company’s CD10 and CD12 clinical trials and its HIV BLA, and by failing to maintain an adequate system of oversight and controls. The consolidated complaint also asserts claims against one or more individual defendants for waste of corporate assets, unjust enrichment, contribution for alleged violations of the federal securities laws, and for breach of fiduciary duty arising from alleged insider trading. The consolidated complaint seeks declaratory and equitable relief, an unspecified amount of damages, and attorneys’ fees and costs.

On January 29, 2024, two purported stockholders filed a purported derivative lawsuit against certain of the Company’s former officers, certain current and former directors, and the Company as a nominal defendant, in the Delaware Court of Chancery. The complaint generally makes allegations similar to those set forth in the Consolidated Derivative Suit and asserts that the individual defendants breached their fiduciary duties by allowing the Company to make false and misleading statements and by failing to maintain an adequate system of oversight and controls. The complaint also asserts claims against certain individual defendants for breach of fiduciary duty arising from alleged insider trading.

On June 20, 2025, two other purported stockholders filed a purported derivative lawsuit against certain of the Company’s former officers, certain former and current directors, a third-party individual, and the Company as a nominal defendant, in the Delaware Court of Chancery. The complaint generally asserts that the individual defendants breached their fiduciary duties by allowing the Company to make false and misleading statements, by failing to maintain an adequate system of oversight and controls, and/or by purportedly wrongfully refusing plaintiffs’ demands that the Company’s board investigate and initiate claims against certain of the Company’s former officers and directors based on allegations and claims similar to those set forth in the complaint. The complaint also asserts claims against certain individual defendants arising from alleged insider trading. The parties have filed a stipulation and proposed order to consolidate this lawsuit with the January 2024 lawsuit.

The Company and the individual defendants deny all allegations of wrongdoing in the complaints and intend to vigorously defend the litigation. In light of the fact that the suit(s) is/are in an early stage and the claims do not specify an amount of damages, the Company cannot predict the ultimate outcome of the matter(s) and cannot reasonably estimate the potential loss or range of loss the Company may incur.

Investor Lawsuit Seeking Issuance of Additional Shares

In January 2025, two former investors and current shareholders, filed an action against the Company in relation to a dispute over how many shares were issued to them following their direct investment(s) with the Company. The former investors claim that the final pricing utilized to calculate the issuance of shares to them in 2022 was incorrect, and that they are entitled to more shares than were issued. The complaint presents legal claims sounding in breach of fiduciary duty, misrepresentation, fraud, negligence, theft, and breach of contract.

The Company's position is that the claims are without any factual support, or support under applicable law and/or the underlying investment documents. The Company views this action as an attempt to extract more shares without further/fair investment and plans to vigorously defend itself.