WEREWOLF THERAPEUTICS INC (HOWL) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $11.64M 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 $5.56M in its March 31, 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 $2.30M, representing an estimated loss of -58.68% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 91% of the total disclosed HOWL value among the investors covered in this analysis. Major shareholders include Ra Capital Management, L.P., Vanguard Capital Management Llc, Mpm Bioimpact 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
47
Total Reported Value
$11.64M
Largest Holder
Ra Capital Management, L.P.
Largest Position
$5.56M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
60
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. | 0.06% | 6,681,307 | $5,562,856 | $2,298,370 | -$3,264,486 | -58.68% | |
| Vanguard Capital Management Llc | 0.00% | 1,217,976 | $1,014,574 | $418,984 | -$595,590 | -58.70% | |
| Mpm Bioimpact Llc | 0.08% | 1,208,810 | $1,006,455 | $415,831 | -$590,624 | -58.68% | |
| Lynx1 Capital Management Lp | 0.09% | 657,786 | $547,673 | $226,278 | -$321,395 | -58.68% | |
| Sphera Funds Management Ltd. | 0.09% | 626,810 | $521,882 | $215,623 | -$306,259 | -58.68% | |
| Dc Funds, Lp | 33.01% | 589,102 | $490,486 | $202,651 | -$287,835 | -58.68% | |
| Squadron Capital Management Llc | 0.19% | 563,535 | $469,199 | $193,856 | -$275,343 | -58.68% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 516,218 | $429,803 | $177,579 | -$252,224 | -58.68% |
| Geode Capital Management, Llc | 0.00% | 389,487 | $324,363 | $133,984 | -$190,379 | -58.69% | |
| Bank Of America Corp | 0.00% | 264,583 | $220,133 | $91,017 | -$129,116 | -58.65% | |
| Vanguard Fiduciary Trust Co | 0.00% | 157,726 | $131,386 | $54,258 | -$77,128 | -58.70% | |
| Millennium Management Llc | 0.00% | 132,050 | $109,945 | $45,425 | -$64,520 | -58.68% | |
| State Street Corp | 0.00% | 119,168 | $99,219 | $40,994 | -$58,225 | -58.68% | |
| Blackrock, Inc. | 0.00% | 101,608 | $84,598 | $34,953 | -$49,645 | -58.68% | |
| Northern Trust Corp | 0.00% | 86,851 | $72,312 | $29,877 | -$42,435 | -58.68% | |
| Alyeska Investment Group, L.P. | 0.00% | 86,554 | $72,065 | $29,775 | -$42,290 | -58.68% | |
| Jane Street Group, Llc | 0.00% | 82,836 | $68,969 | $28,496 | -$40,473 | -58.68% | |
| Bridgeway Capital Management, Llc | 0.00% | 77,000 | $64,110 | $26,488 | -$37,622 | -58.68% | |
| Ubs Group Ag | 0.00% | 66,857 | $55,692 | $22,999 | -$32,693 | -58.70% | |
| Xtx Topco Ltd | 0.00% | 50,929 | $42,403 | $17,520 | -$24,883 | -58.68% | |
| Goldman Sachs Group Inc | 0.00% | 38,266 | $31,860 | $13,164 | -$18,696 | -58.68% | |
| Morgan Stanley | 0.00% | 33,799 | $28,141 | $11,627 | -$16,514 | -58.68% | |
| Simplex Trading, Llc | 0.00% | 32,526 | $27,094 | $11,189 | -$15,905 | -58.70% | |
| Verdad Advisers, Lp | 0.03% | 29,760 | $24,778 | $10,237 | -$14,541 | -58.68% | |
| Raymond James Financial Inc | 0.00% | 19,778 | $16,467 | $6,804 | -$9,663 | -58.68% | |
| Certuity, Llc | 0.00% | 15,000 | $12,489 | $5,160 | -$7,329 | -58.68% | |
| Delta Investment Management, Llc | 0.00% | 14,925 | $12,427 | $5,134 | -$7,293 | -58.69% | |
| Barclays Plc | 0.00% | 13,235 | $11,020 | $4,553 | -$6,467 | -58.69% | |
| Larson Financial Group Llc | 0.00% | 13,052 | $10,867 | $4,490 | -$6,377 | -58.68% | |
| Ranch Capital Advisors Inc. | 0.00% | 12,000 | $9,991 | $4,128 | -$5,863 | -58.68% | |
| Hbk Sorce Advisory Llc | 0.00% | 13,227 | $8,994 | $4,550 | -$4,444 | -49.41% | |
| Citadel Advisors Llc | 0.00% | 10,382 | $8,644 | $3,571 | -$5,073 | -58.68% | |
| Vanguard Global Advisers, Llc | 0.00% | 10,343 | $8,616 | $3,558 | -$5,058 | -58.70% | |
| Cetera Investment Advisers | 0.00% | 10,200 | $8,493 | $3,509 | -$4,984 | -58.69% | |
| Lpl Financial Llc | 0.00% | 10,000 | $8,326 | $3,440 | -$4,886 | -58.68% | |
| Osaic Holdings, Inc. | 0.00% | 8,625 | $7,159 | $2,967 | -$4,192 | -58.56% | |
| Financial Perspectives, Inc | 0.00% | 6,750 | $5,620 | $2,322 | -$3,298 | -58.68% | |
| Tfc Financial Management, Inc. | 0.00% | 4,500 | $3,747 | $1,548 | -$2,199 | -58.69% | |
| Citigroup Inc | 0.00% | 3,384 | $2,818 | $1,164 | -$1,654 | -58.69% | |
| Group One Trading Llc | 0.00% | 1,871 | $1,558 | $644 | -$914 | -58.69% | |
| Bnp Paribas Financial Markets | 0.00% | 790 | $658 | $272 | -$386 | -58.70% | |
| Northwestern Mutual Wealth Management Co | 0.00% | 200 | $167 | $69 | -$98 | -58.80% | |
| Sbi Securities Co., Ltd. | 0.00% | 80 | $67 | $28 | -$39 | -58.93% | |
| Arax Advisory Partners | 0.00% | 12 | $32 | $4 | -$28 | -87.10% | |
| Fmr Llc | 0.00% | 39 | $32 | $13 | -$19 | -58.08% | |
| Optiver Holding B.V. | 0.00% | 22 | $18 | $8 | -$10 | -57.96% | |
| Hrt Financial Lp | 0.00% | 17,861 | $14 | $6,144 | +$6,130 | +43787.03% |
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.