Court dismisses Agenus (AGEN) securities class action, siding with executives

Rhea-AI Filing Summary

Agenus Inc. reports a favorable court ruling in a securities case. On March 24, 2026, the U.S. District Court for the District of Massachusetts dismissed in full a putative securities class action, Byron Olsen v. Agenus Inc. et al., alleging violations of federal securities laws related to the company’s public disclosures.

The court granted the defendants’ motion to dismiss the amended complaint in its entirety and also denied the plaintiff’s request for leave to amend, effectively ending this lawsuit in favor of Agenus and the named individual executives.

Positive

• Putative securities class action dismissed with prejudice-like finality: The federal court granted Agenus Inc.’s motion to dismiss the amended complaint in its entirety and denied the plaintiff’s request for leave to amend, effectively ending this securities lawsuit in favor of the company and its executives.

Negative

• None.

Insights

Litigation and risk analyst

Court dismissal removes an overhang from a securities lawsuit.

The court dismissed a putative securities class action against Agenus Inc. and several executives, granting the defendants’ motion to dismiss the amended complaint in its entirety. The case centered on alleged violations of federal securities laws related to public disclosures.

The judge also denied the plaintiff’s request for leave to amend, which makes this a decisive win at the trial court level rather than a procedural setback. This outcome removes the immediate litigation overhang from this particular case.

Any further developments would have to come from potential appellate activity outside this decision. Subsequent company filings would be the place to look for any updates regarding appeals or related proceedings, if they occur.

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 24, 2026

AGENUS INC.

(Exact name of Registrant as Specified in Its Charter)

Delaware			000-29089	06-1562417
(State or Other Jurisdiction of Incorporation)			(Commission File Number)	(IRS Employer Identification No.)
3 Forbes Road
Lexington, Massachusetts				02421
(Address of Principal Executive Offices)				(Zip Code)

Registrant’s Telephone Number, Including Area Code: 781 674-4400

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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, $0.01 par value per share		AGEN		The Nasdaq Stock Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

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. ☐

Item 8.01 Other Events.

On March 24, 2026, the United States District Court for the District of Massachusetts issued a Memorandum and Order in Byron Olsen, Individually and on Behalf of All Others Similarly Situated v. Agenus Inc., Garo H. Armen, Christine M. Klaskin, Steven J. O'Day, and Todd Yancey, Civil Action No. 24-CV-12299-AK, a putative securities class action alleging violations of the federal securities laws in connection with the Company’s public disclosures.

The court granted defendants’ motion to dismiss the amended complaint in its entirety, ruling in favor of Agenus Inc. and the individual defendants Garo H. Armen, Christine M. Klaskin, Steven J. O'Day, and Todd Yancey. The court also denied the plaintiff’s request for leave to amend.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date:	March 26, 2026	By:	/s/ Garo H. Armen
			Garo H. Armen, Chairman and CEO

FAQ

What litigation outcome did Agenus (AGEN) disclose in this 8-K?

Agenus disclosed that a U.S. District Court dismissed a putative securities class action, Byron Olsen v. Agenus Inc. et al., in its entirety. The court granted the defendants’ motion to dismiss the amended complaint and ruled in favor of the company and individual defendants.

Which court handled the Agenus (AGEN) securities class action?

The case was handled by the United States District Court for the District of Massachusetts. This federal court issued a Memorandum and Order on March 24, 2026, dismissing the amended complaint against Agenus and several executives in the securities class action.

What were the allegations in the Agenus (AGEN) Olsen securities lawsuit?

The lawsuit, Byron Olsen v. Agenus Inc. et al., was a putative securities class action alleging violations of federal securities laws. It focused on Agenus’s public disclosures, claiming they were improper under these laws, before the court dismissed the case in favor of the defendants.

Did the court allow further amendments in the Agenus (AGEN) class action?

No, the court denied the plaintiff’s request for leave to amend the complaint. By granting the motion to dismiss in its entirety and refusing amendment, the decision effectively ends this particular securities class action at the trial court level for Agenus and the executives named.

Who were the individual defendants in the Agenus (AGEN) securities case?

The individual defendants were Garo H. Armen, Christine M. Klaskin, Steven J. O'Day, and Todd Yancey. The court’s Memorandum and Order dismissed the amended complaint in its entirety, ruling in favor of Agenus Inc. and all of these named individual defendants.

What is the significance of Item 8.01 in the Agenus (AGEN) filing?

Item 8.01 in the filing is used to report other events the company considers important to shareholders. Agenus used it to disclose the dismissal of a putative securities class action, highlighting a resolved legal matter concerning its public disclosures and alleged securities law violations.

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