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Agenus Inc. (AGEN) is the subject of a Schedule 13G reporting that Eventide Asset Management, LLC, Finny Kuruvilla, M.D., Ph.D., and Robin C. John each report beneficial ownership of the same 2,446,789 shares of common stock, equal to 5.4% of the outstanding class.
Eventide Healthcare & Life Sciences Fund held the shares as of September 30, 2026, with Eventide serving as its investment adviser. Eventide reported sole voting and dispositive power over the shares; Kuruvilla and John each reported shared voting and dispositive power. All three expressly disclaimed beneficial ownership under Rule 13d-4.
Key Figures
Common shares reported:2,446,789 sharesPercentage of outstanding common stock:5.4%
2 metrics
Common shares reported2,446,789 sharesThe same block was reported by each of the three reporting persons and held by Eventide Healthcare & Life Sciences Fund as of September 30, 2026.
Percentage of outstanding common stock5.4%Percentage represented by the 2,446,789-share block as of September 30, 2026.
Key Terms
beneficial ownership, Shared Voting Power, dispositive power, registered investment company
4 terms
beneficial ownershipregulatory
"expressly disclaim the beneficial ownership"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
Shared Voting Powerregulatory
"Kuruvilla and John: 2,446,789"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
dispositive powerregulatory
"shared power to dispose or to direct the disposition"
Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.
registered investment companyregulatory
"Eventide Healthcare & Life Sciences Fund which is a registered investment company"
A registered investment company is a pooled investment vehicle—such as a mutual fund or closed-end fund—that is officially registered with financial regulators and required to follow rules about disclosure, how it invests, and what fees it charges. Think of it as a shared basket of stocks or bonds managed for many investors; registration means regular reporting and oversight that help investors compare costs, understand risks, and know how easy it is to buy or sell their shares.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
How many AGEN shares did Eventide and the other reporting persons report?
Eventide Asset Management, LLC, Finny Kuruvilla, M.D., Ph.D., and Robin C. John each reported the same block of 2,446,789 shares, representing 5.4% of the outstanding common stock. Eventide Healthcare & Life Sciences Fund held those shares as of September 30, 2026.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Agenus Inc
(Name of Issuer)
Common stock, par value $0.01
(Title of Class of Securities)
00847G804
(CUSIP Number)
09/30/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
00847G804
1
Names of Reporting Persons
Eventide Asset Management, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
2,446,789.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
2,446,789.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,446,789.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.4 %
12
Type of Reporting Person (See Instructions)
IA
SCHEDULE 13G
CUSIP Number(s):
00847G804
1
Names of Reporting Persons
Finny Kuruvilla, M.D. Ph. D.
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
2,446,789.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
2,446,789.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,446,789.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.4 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
CUSIP Number(s):
00847G804
1
Names of Reporting Persons
Robin C. John
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
2,446,789.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
2,446,789.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,446,789.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.4 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Agenus Inc
(b)
Address of issuer's principal executive offices:
3 FORBES ROAD, LEXINGTON, MA, 02421
Item 2.
(a)
Name of person filing:
(i) Eventide Asset Management, LLC ("Eventide")
(ii) Finny Kuruvilla, M.D., Ph.D. ("Kuruvilla")
(iii) Robin C. John ("John")
(b)
Address or principal business office or, if none, residence:
Eventide, Kuruvilla and John:
One International Place, Suite 4210
Boston, Massachusetts 02110
(c)
Citizenship:
Eventide: Delaware
Kuruvilla: United States
John: United States
(d)
Title of class of securities:
Common stock, par value $0.01
(e)
CUSIP Number(s):
00847G804
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
(i) Eventide: 2,446,789
(ii) Kuruvilla: 2,446,789
(iii) John: 2,446,789
(b)
Percent of class:
(i) Eventide: 5.4%
(ii) Kuruvilla: 5.4%
(iii) John: 5.4%
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
As of September 30, 2026, Eventide Asset Management, LLC, a Delaware limited liability company located at One International Place, Suite 4210, Boston, Massachusetts 02110, is the beneficial owner of 2,446,789 shares of the Issuer's Common Stock by virtue of being the investment adviser to Eventide Healthcare & Life Sciences Fund which is a registered investment company.
As of September 30, 2026, the Eventide Healthcare & Life Sciences Fund held 2,446,789 shares of the Issuer's Common Stock, representing 5.4% of the Issuer's outstanding Common Stock.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
In accordance with Rule 13d-4 of the Securities Exchange Act of 1934, each of the persons filing this statement expressly disclaim the beneficial ownership of the securities covered by this statement and the filing of this report shall not be construed as an admission by such persons that they are the beneficial owners of such securities.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Eventide Asset Management, LLC
Signature:
/s/ Peter J. Luiso
Name/Title:
Peter J. Luiso, General Counsel
Date:
11/13/2026
Finny Kuruvilla, M.D. Ph. D.
Signature:
/s/ Finny Kuruvilla, M.D., Ph. D.
Name/Title:
Finny Kuruvilla, M.D., Ph. D.
Date:
11/13/2026
Robin C. John
Signature:
/s/ Robin C. John
Name/Title:
Robin C. John
Date:
11/13/2026
Exhibit Information
EXHIBIT 1
WHEREAS, in accordance with Rule 13d-1(k)(1) under the Securities and Exchange Act of 1934 (the "Act"), only one joint Statement and any amendments thereto need to be filed whenever one or more persons are required to file such a Statement or any amendments thereto pursuant to Section 13(d) of the Act with respect to the same securities, provided that said persons agree in writing that such Statement or amendments thereto is filed on behalf of each of them;
NOW, THEREFORE, the parties hereto agree as follows:
Eventide Asset Management, LLC, Finny Kuruvilla, M.D., Ph. D. and Robin C. John do hereby agree, in accordance with Rule 13d-1(k)(1) under the Act, to file a Statement on Schedule 13G relating to their ownership of the Common Stock of the Issuer, and do hereby further agree that said Statement on Schedule 13G shall be filed on behalf of each of them.
Eventide Asset Management, LLC
Date: November 13, 2026
By: /s/ Peter J. Luiso
Name: Peter J. Luiso
Title: General Counsel
Finny Kuruvilla, M.D., Ph. D.
Date: November 13, 2026
By: /s/ Finny Kuruvilla, M.D., Ph. D.
Name: Finny Kuruvilla, M.D., Ph. D.
Robin C. John
Date: November 13, 2026
By: /s/ Robin C. John
Name: Robin C. John
