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Disclosery

HOWL WEREWOLF THERAPEUTICS INC

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CMN (common), issuer CIK 1785530

61 managers (62 13F filers) reported a position in HOWL shares at 2025-09-30, 21,108,387 shares in all. 8 filers opened a position and 10 filers sold out during the quarter.

Managers
61
13F filers
62
New
8
Added
10
Reduced
21
Sold out
10
Shares held by filers
21,108,387

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
RA CAPITAL MANAGEMENT, L.P.in group RA CAPITAL MANAGEMENT, L.P.6,681,307$13.2M0.16%013F-HRTimelineGroup
MPM ASSET MANAGEMENT LLC4,309,860$8.49M19.08%013F-HRTimeline
MPM BIOIMPACT LLC2,408,810$4.75M0.78%013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/1,830,292$3.61M<0.01%-298,73213F-HR/ATimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC1,408,047$2.77M<0.01%+109,79613F-HRTimelineGroup
SPHERA FUNDS MANAGEMENT LTD.in group SPHERA FUNDS MANAGEMENT LTD.626,810$1.23M0.29%013F-HRTimelineGroup
DC Funds, LP589,102$1.16M37.32%013F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC456,000$898K<0.01%+139,70013F-HRTimeline
PFM Health Sciences, LP401,110$790K0.07%013F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC330,787$652K<0.01%+2,83213F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC317,053$625K<0.01%-379,64213F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC268,577$529K<0.01%-106,36213F-HRTimelineGroup
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.235,705$464K<0.01%013F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC154,534$304K<0.01%new13F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP119,168$235K<0.01%013F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC102,000$201K<0.01%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.101,323$200K<0.01%-260,66013F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…93,041$183K<0.01%+13,43913F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP65,836$130K<0.01%013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC60,341$119K<0.01%-167,10113F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding54,739$108K-47,283Timeline
EDGEWOOD MANAGEMENT LLC50,000$98.5K<0.01%013F-HRTimeline
Cubist Systematic Strategies, LLC46,711$92K<0.01%new13F-HRTimeline
HRT FINANCIAL LP39,859$78K<0.01%-2,62113F-HRTimeline
Vontobel Holding Ltd.in group Vontobel Holding Ltd.36,000$70.9K<0.01%-4,00013F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC34,285$67K<0.01%-26,99213F-HRTimelineGroup
Qube Research & Technologies Ltd29,250$57.6K<0.01%-15,01113F-HRTimeline
Regal Investment Advisors LLC27,204$53.6K<0.01%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY19,252$37.9K<0.01%-7,94813F-HR/ATimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC17,807$35.1K<0.01%-74,36113F-HRTimelineGroup
SIMPLEX TRADING, LLC15,636$30K<0.01%+8,63713F-HRTimeline
CERTUITY, LLC15,000$29.6K<0.01%013F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC14,436$28.4K<0.01%+1,39213F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC13,275$26.2K<0.01%+3913F-HR/ATimelineGroup
Point72 Asia (Singapore) Pte. Ltd.13,016$25.6K<0.01%-7,11013F-HRTimeline
UBS Group AGin group UBS Group AG12,776$25.2K<0.01%+9,33813F-HRTimelineGroup
Virtu Financial LLCin group Virtu Financial LLC12,230$24K<0.01%new13F-HRTimelineGroup
HBK Sorce Advisory LLC13,227$23.3K<0.01%013F-HR/ATimeline
FMR LLCin group FMR LLC11,284$22.2K<0.01%013F-HRTimelineGroup
Cetera Investment Advisers10,200$20.1K<0.01%new13F-HRTimeline
Larson Financial Group LLC10,000$19.7K<0.01%013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC8,661$17.1K<0.01%+8,34013F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.9,625$13.3K<0.01%013F-HRTimelineGroup
Financial Perspectives, Inc6,750$13.3K<0.01%013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…6,004$11.8K<0.01%-8,37313F-HRTimelineGroup
HIGHLINE WEALTH PARTNERS LLC5,000$9.85K<0.01%-5,00013F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.4,387$8.64K<0.01%013F-HRTimelineGroup
GROUP ONE TRADING LLC2,671$5.26K<0.01%new13F-HRTimeline
TFC Financial Management, Inc.2,500$4.92K<0.01%013F-HRTimeline
CWM, LLCin group CWM, LLC1,569$3K<0.01%-6,87913F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC1,375$2.71K<0.01%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO1,123$2.21K<0.01%-9,77513F-HR/ATimelineGroup
Rossby Financial, LCC860$1.68K<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS793$1.56K<0.01%-2,82013F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA806$1K<0.01%-9,73713F-HRTimelineGroup
Advisory Services Network, LLC157$309<0.01%new13F-HRTimeline
Arax Advisory Partners68$133<0.01%new13F-HRTimeline
Plante Moran Financial Advisors, LLC50$99<0.01%013F-HRTimeline
SBI Securities Co., Ltd.41$81<0.01%+113F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…35$69<0.01%-13213F-HRTimelineGroup
Optiver Holding B.V.in group Optiver Holding B.V.22$43<0.01%new13F-HRTimelineGroup