13D Filings
WEREWOLF THERAPEUTICS, INC.
HOWL
Amendment
Ownership

3.80%

Total Shares

1,826,646

Issuer CIK

1785530

Event Date

May 7, 2026

Accepted

May 12, 2026, 07:56 PM

Reporting Persons (14)
Joint Filing

This is a joint filing. The reported shares may overlap between reporting persons and should not be summed.

NameType% of ClassAggregateSole VotingShared Voting
ANSBERT GADICKE
Individual
3.80%1,826,64601,826,646
LUKE EVNIN
Individual
2.40%1,171,17501,171,175
Todd Foley
Individual
1.80%872,3610872,361
MPM BioVentures 2014 LLC
Other
1.80%872,3610872,361
MPM BioVentures 2014 GP LLC
Other
1.70%845,0940845,094
MPM BioVentures 2014, L.P.
Partnership
1.60%792,254792,2540
MPM BioImpact LLC
Other
1.30%655,4710655,471
UBS Oncology Impact Fund L.P.
Partnership
1.30%655,471655,4710
Oncology Impact Fund (Cayman) Management L.P.
Partnership
1.30%655,4710655,471
MPM ONCOLOGY INNOVATIONS FUND LP
Partnership
0.40%173,334173,3340
MPM Oncology Innovations Fund GP LLC
Other
0.40%173,3340173,334
MPM ASSET MANAGEMENT LLC
Other
0.30%125,480125,4800
MPM Asset Management Investors BV2014 LLC
Other
0.10%27,26727,2670
MPM BioVentures 2014 (B), L.P.
Partnership
0.10%52,84052,8400
Disclosure Items (3)

Security Title

Common Stock

Issuer Name

WEREWOLF THERAPEUTICS, INC.

Issuer Address

200 TALCOTT AVENUE, WATERTOWN, MA, 02472

Percentage of Class

See rows (11) and (13) of the Filing Persons Owner Profile of this Amendment No. 7 for the aggregate number of Common Stock and percentages of the shares of Common Stock beneficially owned by the Filing Person. The Common Stock is held as follows: * 792,254 shares are held directly by BV 2014; * 52,840 shares are held directly by BV 2014(B); * 27,267 shares are held directly by AM BV2014 LLC; * 173,334 shares are held directly by MPM OIF; * 125,480 shares by AM LLC; and * 655,471 shares are held directly by UBS Oncology. BV 2014 GP and BV 2014 LLC are the direct and indirect general partners of BV 2014 and BV 2014(B) and, accordingly, may be deemed to beneficially own the shares held by BV 2014 and BV 2014(B). BV 2014 LLC is the managing member of AM BV2014 LLC and, accordingly, may be deemed to beneficially own the shares held by AM BV2014 LLC. MPM OIF GP is the general Partner of MPM OIF and, accordingly, may be deemed to beneficially own the shares held by MPM OIF. BioImpact and Oncology Cayman are the direct and indirect general partners of UBS Oncology and, accordingly, may be deemed to beneficially own the shares held by UBS Oncology. Drs. Gadicke and Evnin and Mr. Foley are the managing directors of BV 2014 LLC and, accordingly, may be deemed to beneficially own the shares held by BV 2014, BV 2014(B) and AM BV2014 LLC. Drs. Gadicke and Evnin are the members of AM LLC and managers of MPM OIF GP and, accordingly, may be deemed to beneficially own the shares held by AM LLC and MPM OIF. Dr. Gadicke is the managing partner of BioImpact and, accordingly may be deemed to beneficially own the shares held by UBS Oncology. Calculation of the percentage of the shares of Common Stock beneficially owned is based upon 48,596,817 shares of Common Stock outstanding as of May 1, 2026, as reported in the Issuer's Form 10-Q filed with the SEC on May 7, 2026.

Number of Shares

See rows (7) through (10) of the Filing Persons Owner Profile of this Amendment No. 7 for the number of shares as to which there is sole power to vote or to direct the vote, sole power to dispose or to direct the disposition, or shared power to dispose or to direct the disposition.

Transactions

The Reporting Persons sold the following Common Stock in the open market since Amendment No. 6: Date of Price Range Ave. Price Sold by Sold by Sold By Sold by Sold by Sold by Sale BV 2014 BV AM BV2014 MPM OIF AM LLC UBS 2014(B) LLC Oncology 05/06/26 $0.65-$0.7054 $0.66 9,900 660 341 2,166 1,568 8,190 05/07/26 $0.62-$0.667 $0.63 53,499 3,568 1,841 11,705 8.473 44,262 05/08/26 $0.6183-$0.7668 $0.70 206,820 13,795 7,119 45,250 32,757 171,114 05/11/26 $0.66-$0.7002 $0.67 22,965 1,532 790 5,024 3,637 19,000 05/12/26 $0.6286-$0.66 $0.64 45,921 3,063 1,581 10,047 7,273 37,994

Shareholders

Inapplicable.

Date of 5% Ownership

May 8, 2026

Exhibit 99.C - Joint Filing Statement

WEREWOLF THERAPEUTICS, INC. — Schedule 13D | 13D Filings