HOWL Institutional Ownership & Shareholders
WEREWOLF THERAPEUTICS INC (HOWL) is currently held by 49 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $4.39M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Ra Capital Management, L.P. is currently the largest disclosed institutional shareholder of HOWL tracked by InsiderSet, reporting ownership valued at approximately $859,349 in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $2.35M, representing an estimated gain of +173.99% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 73% of the total disclosed HOWL value among the investors covered in this analysis. Major shareholders include Ra Capital Management, L.P., Balyasny Asset Management L.P., Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in WEREWOLF THERAPEUTICS INC (HOWL).
This page ranks the largest institutional HOWL shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
49
Total Reported Value
$4.39M
Largest Holder
Ra Capital Management, L.P.
Largest Position
$859,349
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
70
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 0.01% | 2,387,744 | $859,349 | $2,354,554 | +$1,495,205 | +173.99% | |
| Balyasny Asset Management L.P. | 0.00% | 1,790,089 | $644,253 | $1,765,207 | +$1,120,954 | +173.99% | |
| Vanguard Capital Management Llc | 0.00% | 1,217,976 | $438,471 | $1,201,046 | +$762,575 | +173.92% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 674,632 | $242,800 | $665,255 | +$422,455 | +173.99% |
| Lynx1 Capital Management Lp | 0.03% | 657,786 | $236,737 | $648,643 | +$411,906 | +173.99% | |
| Sphera Funds Management Ltd. | 0.03% | 626,810 | $225,589 | $618,097 | +$392,508 | +173.99% | |
| Dc Funds, Lp | 16.92% | 589,102 | $212,018 | $580,913 | +$368,895 | +173.99% | |
| Verdad Advisers, Lp | 0.12% | 348,709 | $125,500 | $343,862 | +$218,362 | +173.99% | |
| Geode Capital Management, Llc | 0.00% | 335,815 | $120,895 | $331,147 | +$210,252 | +173.91% | |
| Bank Of America Corp | 0.00% | 311,502 | $111,829 | $307,172 | +$195,343 | +174.68% | |
| Xtx Topco Ltd | 0.00% | 271,478 | $97,705 | $267,704 | +$169,999 | +173.99% | |
| Jane Street Group, Llc | 0.00% | 251,837 | $90,637 | $248,336 | +$157,699 | +173.99% | |
| Ubs Group Ag | 0.00% | 215,838 | $77,702 | $212,838 | +$135,136 | +173.92% | |
| Vanguard Fiduciary Trust Co | 0.00% | 157,726 | $56,781 | $155,534 | +$98,753 | +173.92% | |
| Vontobel Holding Ltd. | 0.00% | 60,000 | $55,338 | $59,166 | +$3,828 | +6.92% | |
| Vilga Financial Planning Llc | 0.03% | 53,423 | $49,272 | $52,680 | +$3,408 | +6.92% | |
| State Street Corp | 0.00% | 119,168 | $42,889 | $117,512 | +$74,623 | +173.99% | |
| Squarepoint Ops Llc | 0.00% | 103,242 | $37,157 | $101,807 | +$64,650 | +173.99% | |
| Blackrock, Inc. | 0.00% | 101,573 | $36,556 | $100,161 | +$63,605 | +173.99% | |
| Rangeley Capital, Llc | 0.03% | 100,000 | $35,990 | $98,610 | +$62,620 | +173.99% | |
| Northern Trust Corp | 0.00% | 86,851 | $31,258 | $85,644 | +$54,386 | +173.99% | |
| Alyeska Investment Group, L.P. | 0.00% | 86,554 | $31,151 | $85,351 | +$54,200 | +173.99% | |
| Mpm Bioimpact Llc | 0.00% | 80,142 | $28,851 | $79,028 | +$50,177 | +173.92% | |
| Millennium Management Llc | 0.00% | 62,055 | $22,334 | $61,192 | +$38,858 | +173.99% | |
| Virtu Financial Llc | 0.00% | 45,467 | $16,000 | $44,835 | +$28,835 | +180.22% | |
| Certuity, Llc | 0.00% | 15,000 | $13,835 | $14,792 | +$957 | +6.91% | |
| Marest Capital, Llc | 0.01% | 10,870 | $10,025 | $10,719 | +$694 | +6.92% | |
| Gsa Capital Partners Llp | 0.00% | 27,146 | $10,000 | $26,769 | +$16,769 | +167.69% | |
| Two Sigma Investments, Lp | 0.00% | 27,300 | $9,825 | $26,921 | +$17,096 | +174.00% | |
| Stonex Group Inc. | 0.00% | 20,000 | $9,000 | $19,722 | +$10,722 | +119.13% | |
| Goldman Sachs Group Inc | 0.00% | 20,023 | $7,206 | $19,745 | +$12,539 | +174.00% | |
| Morgan Stanley | 0.00% | 19,108 | $6,877 | $18,842 | +$11,965 | +173.99% | |
| Hbk Sorce Advisory Llc | 0.00% | 13,227 | $5,317 | $13,043 | +$7,726 | +145.31% | |
| Barclays Plc | 0.00% | 13,235 | $4,763 | $13,051 | +$8,288 | +174.01% | |
| Larson Financial Group Llc | 0.00% | 13,052 | $4,697 | $12,871 | +$8,174 | +174.02% | |
| Lpl Financial Llc | 0.00% | 11,791 | $4,244 | $11,627 | +$7,383 | +173.97% | |
| Ranch Capital Advisors Inc. | 0.00% | 11,000 | $3,959 | $10,847 | +$6,888 | +173.99% | |
| Cetera Investment Advisers | 0.00% | 10,200 | $3,671 | $10,058 | +$6,387 | +173.99% | |
| Tower Research Capital Llc (Trc) | 0.00% | 9,897 | $3,562 | $9,759 | +$6,197 | +173.99% | |
| Osaic Holdings, Inc. | 0.00% | 8,625 | $3,105 | $8,505 | +$5,400 | +173.92% | |
| Financial Perspectives, Inc | 0.00% | 6,750 | $2,429 | $6,656 | +$4,227 | +174.03% | |
| Group One Trading Llc | 0.00% | 1,871 | $673 | $1,845 | +$1,172 | +174.14% | |
| Jpmorgan Chase & Co | 0.00% | 2,108 | $650 | $2,079 | +$1,429 | +219.80% | |
| Bnp Paribas Financial Markets | 0.00% | 790 | $284 | $779 | +$495 | +174.30% | |
| Covestor Ltd | 0.08% | 134,212 | $124 | $132,346 | +$132,222 | +106631.01% | |
| Sbi Securities Co., Ltd. | 0.00% | 130 | $120 | $128 | +$8 | +6.83% | |
| Simplex Trading, Llc | 0.00% | 255 | $91 | $251 | +$160 | +176.32% | |
| Optiver Holding B.V. | 0.00% | 22 | $8 | $22 | +$14 | +171.18% |
Frequently asked questions about HOWL
Who are the largest institutional holders of HOWL?
The largest institutional holders of HOWL reported in the latest SEC Form 13F filings include Ra Capital Management, L.P., Balyasny Asset Management L.P., Vanguard Capital Management Llc, Renaissance Technologies LLC, and Lynx1 Capital Management Lp. InsiderSet ranks institutional holders by their latest reported HOWL position.
What is HOWL institutional ownership?
This page tracks HOWL positions reported by institutional investment managers through SEC Form 13F. WEREWOLF THERAPEUTICS INC (HOWL) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own HOWL?
InsiderSet currently tracks 49 institutional managers reporting HOWL holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of HOWL shareholders.
How much HOWL stock do institutions own?
Institutional investment managers disclosed approximately $4.39M in HOWL holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was HOWL institutional ownership last updated?
The latest HOWL institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional HOWL holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its HOWL position after the reporting date.
Are institutions buying or selling HOWL?
Institutional buying and selling can be analyzed by comparing HOWL positions across consecutive 13F reporting periods. InsiderSet's HOWL Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View HOWL ownership changes.
How has HOWL institutional ownership changed over time?
InsiderSet tracks HOWL institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.