WEREWOLF THERAPEUTICS INC (HOWL) Institutional Shareholders
WEREWOLF THERAPEUTICS INC (HOWL) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $3.91M in HOWL holdings during the latest filing period.
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 $2.19M, representing an estimated gain of +155.35% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 82% 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
45
Total Reported Value
$3.91M
Largest Holder
Ra Capital Management, L.P.
Largest Position
$859,349
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
68
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 | $2,194,337 | +$1,334,988 | +155.35% | |
| Balyasny Asset Management L.P. | 0.00% | 1,790,089 | $644,253 | $1,645,092 | +$1,000,839 | +155.35% | |
| Vanguard Capital Management Llc | 0.00% | 1,217,976 | $438,471 | $1,119,320 | +$680,849 | +155.28% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 674,632 | $242,800 | $619,987 | +$377,187 | +155.35% |
| Lynx1 Capital Management Lp | 0.03% | 657,786 | $236,737 | $604,505 | +$367,768 | +155.35% | |
| Sphera Funds Management Ltd. | 0.03% | 626,810 | $225,589 | $576,038 | +$350,449 | +155.35% | |
| Dc Funds, Lp | 16.92% | 589,102 | $212,018 | $541,385 | +$329,367 | +155.35% | |
| Verdad Advisers, Lp | 0.12% | 348,709 | $125,500 | $320,464 | +$194,964 | +155.35% | |
| Geode Capital Management, Llc | 0.00% | 335,815 | $120,895 | $308,614 | +$187,719 | +155.27% | |
| Bank Of America Corp | 0.00% | 311,502 | $111,829 | $286,270 | +$174,441 | +155.99% | |
| Xtx Topco Ltd | 0.00% | 271,478 | $97,705 | $249,488 | +$151,783 | +155.35% | |
| Jane Street Group, Llc | 0.00% | 251,837 | $90,637 | $231,438 | +$140,801 | +155.35% | |
| Ubs Group Ag | 0.00% | 215,838 | $77,702 | $198,355 | +$120,653 | +155.28% | |
| Vanguard Fiduciary Trust Co | 0.00% | 157,726 | $56,781 | $144,950 | +$88,169 | +155.28% | |
| State Street Corp | 0.00% | 119,168 | $42,889 | $109,515 | +$66,626 | +155.35% | |
| Squarepoint Ops Llc | 0.00% | 103,242 | $37,157 | $94,879 | +$57,722 | +155.35% | |
| Blackrock, Inc. | 0.00% | 101,573 | $36,556 | $93,346 | +$56,790 | +155.35% | |
| Rangeley Capital, Llc | 0.03% | 100,000 | $35,990 | $91,900 | +$55,910 | +155.35% | |
| Northern Trust Corp | 0.00% | 86,851 | $31,258 | $79,816 | +$48,558 | +155.35% | |
| Alyeska Investment Group, L.P. | 0.00% | 86,554 | $31,151 | $79,543 | +$48,392 | +155.35% | |
| Mpm Bioimpact Llc | 0.00% | 80,142 | $28,851 | $73,650 | +$44,799 | +155.28% | |
| Millennium Management Llc | 0.00% | 62,055 | $22,334 | $57,029 | +$34,695 | +155.34% | |
| Virtu Financial Llc | 0.00% | 45,467 | $16,000 | $41,784 | +$25,784 | +161.15% | |
| Gsa Capital Partners Llp | 0.00% | 27,146 | $10,000 | $24,947 | +$14,947 | +149.47% | |
| Two Sigma Investments, Lp | 0.00% | 27,300 | $9,825 | $25,089 | +$15,264 | +155.36% | |
| Stonex Group Inc. | 0.00% | 20,000 | $9,000 | $18,380 | +$9,380 | +104.22% | |
| Goldman Sachs Group Inc | 0.00% | 20,023 | $7,206 | $18,401 | +$11,195 | +155.36% | |
| Morgan Stanley | 0.00% | 19,108 | $6,877 | $17,560 | +$10,683 | +155.35% | |
| Certuity, Llc | 0.00% | 15,000 | $5,399 | $13,785 | +$8,386 | +155.33% | |
| Hbk Sorce Advisory Llc | 0.00% | 13,227 | $5,317 | $12,156 | +$6,839 | +128.62% | |
| Barclays Plc | 0.00% | 13,235 | $4,763 | $12,163 | +$7,400 | +155.36% | |
| Larson Financial Group Llc | 0.00% | 13,052 | $4,697 | $11,995 | +$7,298 | +155.37% | |
| Lpl Financial Llc | 0.00% | 11,791 | $4,244 | $10,836 | +$6,592 | +155.32% | |
| Ranch Capital Advisors Inc. | 0.00% | 11,000 | $3,959 | $10,109 | +$6,150 | +155.34% | |
| Marest Capital, Llc | 0.00% | 10,870 | $3,912 | $9,990 | +$6,078 | +155.36% | |
| Cetera Investment Advisers | 0.00% | 10,200 | $3,671 | $9,374 | +$5,703 | +155.35% | |
| Tower Research Capital Llc (Trc) | 0.00% | 9,897 | $3,562 | $9,095 | +$5,533 | +155.34% | |
| Osaic Holdings, Inc. | 0.00% | 8,625 | $3,105 | $7,926 | +$4,821 | +155.28% | |
| Financial Perspectives, Inc | 0.00% | 6,750 | $2,429 | $6,203 | +$3,774 | +155.38% | |
| Group One Trading Llc | 0.00% | 1,871 | $673 | $1,719 | +$1,046 | +155.49% | |
| Jpmorgan Chase & Co | 0.00% | 2,108 | $650 | $1,937 | +$1,287 | +198.04% | |
| Bnp Paribas Financial Markets | 0.00% | 790 | $284 | $726 | +$442 | +155.64% | |
| Simplex Trading, Llc | 0.00% | 255 | $91 | $234 | +$143 | +157.52% | |
| Sbi Securities Co., Ltd. | 0.00% | 100 | $36 | $92 | +$56 | +155.28% | |
| Optiver Holding B.V. | 0.00% | 22 | $8 | $20 | +$12 | +152.72% |
Frequently asked questions about HOWL
Who owns the most HOWL stock?
The largest holders of HOWL are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for WEREWOLF THERAPEUTICS INC (HOWL).
Is HOWL widely held by superinvestors?
Many widely followed stocks like HOWL appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly HOWL is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.