SUMMIT THERAPEUTICS INC (SMMT) Institutional Shareholders
SUMMIT THERAPEUTICS INC (SMMT) 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 $1.93B in SMMT holdings during the latest filing period.
Baker Bros. Advisors Lp is currently the largest disclosed institutional shareholder of SMMT tracked by InsiderSet, reporting ownership valued at approximately $477.70M 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 $419.01M, representing an estimated loss of -12.29% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 68% of the total disclosed SMMT value among the investors covered in this analysis. Major shareholders include Baker Bros. Advisors Lp, Fmr Llc, State Street Corp, and several other long-term asset managers with concentrated positions in SUMMIT THERAPEUTICS INC (SMMT).
This page ranks the largest institutional SMMT 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
239
Total Reported Value
$1.93B
Largest Holder
Baker Bros. Advisors Lp
Largest Position
$477.70M
Insider Transactions (90d)
5
Latest Filing Quarter
Q2 2026
New Institutional Positions
84
Funds Exiting Positions
2
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Baker Bros. Advisors Lp | 2.39% | 32,786,348 | $477,697,090 | $419,009,527 | -$58,687,563 | -12.29% | |
| Fmr Llc | 0.01% | 10,043,947 | $146,340,308 | $128,361,643 | -$17,978,665 | -12.29% | |
| State Street Corp | 0.00% | 9,536,796 | $138,951,118 | $121,880,253 | -$17,070,865 | -12.29% | |
| Blackrock, Inc. | 0.00% | 9,529,041 | $138,838,127 | $121,781,144 | -$17,056,983 | -12.29% | |
| Vanguard Capital Management Llc | 0.00% | 5,734,484 | $83,551,432 | $73,286,706 | -$10,264,726 | -12.29% | |
| Ubs Group Ag | 0.01% | 5,233,798 | $76,256,437 | $66,887,938 | -$9,368,499 | -12.29% | |
| Vanguard Portfolio Management Llc | 0.00% | 5,042,190 | $73,464,708 | $64,439,188 | -$9,025,520 | -12.29% | |
| Goldman Sachs Group Inc | 0.01% | 4,513,399 | $65,760,228 | $57,681,239 | -$8,078,989 | -12.29% | |
| Point72 Asset Management, L.P. | 0.08% | 3,697,803 | $53,876,990 | $47,257,922 | -$6,619,068 | -12.29% | |
| Geode Capital Management, Llc | 0.00% | 3,427,263 | $49,950,115 | $43,800,421 | -$6,149,694 | -12.31% | |
| Millennium Management Llc | 0.02% | 2,349,081 | $34,226,110 | $30,021,255 | -$4,204,855 | -12.29% | |
| Adage Capital Partners Gp, L.L.C. | 0.04% | 1,989,591 | $28,988,341 | $25,426,973 | -$3,561,368 | -12.29% | |
| Balyasny Asset Management L.P. | 0.05% | 1,904,254 | $27,744,981 | $24,336,366 | -$3,408,615 | -12.29% | |
| Citadel Advisors Llc | 0.01% | 1,725,716 | $25,143,682 | $22,054,650 | -$3,089,032 | -12.29% | |
| Aberdeen Group Plc | 0.03% | 1,693,626 | $24,676,131 | $21,644,540 | -$3,031,591 | -12.29% | |
| Squarepoint Ops Llc | 0.04% | 1,590,736 | $23,177,024 | $20,329,606 | -$2,847,418 | -12.29% | |
| Morgan Stanley | 0.00% | 1,450,019 | $21,126,777 | $18,531,243 | -$2,595,534 | -12.29% | |
| Norges Bank | 0.00% | 1,382,519 | $20,143,302 | $17,668,593 | -$2,474,709 | -12.29% | |
| Logos Global Management Lp | 0.85% | 1,350,000 | $19,669,500 | $17,253,000 | -$2,416,500 | -12.29% | |
| Octagon Capital Advisors Lp | 1.67% | 1,250,000 | $18,212,500 | $15,975,000 | -$2,237,500 | -12.29% | |
| D. E. Shaw & Co., Inc. | 0.01% | 1,243,556 | $18,118,611 | $15,892,646 | -$2,225,965 | -12.29% | |
| Kynam Capital Management, Lp | 0.97% | 1,200,000 | $17,484,000 | $15,336,000 | -$2,148,000 | -12.29% | |
| Pictet Asset Management Holding Sa | 0.02% | 1,134,299 | $16,434,565 | $14,496,341 | -$1,938,224 | -11.79% | |
| Charles Schwab Investment Management Inc | 0.00% | 976,851 | $14,232,719 | $12,484,156 | -$1,748,563 | -12.29% | |
| Sixth Street Partners Management Company, L.P. | 0.00% | 976,851 | $14,232,719 | $12,484,156 | -$1,748,563 | -12.29% | |
| Vanguard Fiduciary Trust Co | 0.00% | 966,585 | $14,083,143 | $12,352,956 | -$1,730,187 | -12.29% | |
| Apeiron Capital Ltd | 9.00% | 961,866 | $14,014,388 | $12,292,647 | -$1,721,741 | -12.29% | |
| Bank Of America Corp | 0.00% | 864,983 | $12,602,803 | $11,054,483 | -$1,548,320 | -12.29% | |
| Schroder Investment Management Group | 0.01% | 835,963 | $11,970,990 | $10,683,607 | -$1,287,383 | -10.75% | |
| Rock Springs Capital Management Lp | 0.51% | 715,000 | $10,417,550 | $9,137,700 | -$1,279,850 | -12.29% | |
| Citigroup Inc | 0.00% | 714,000 | $10,402,980 | $9,124,920 | -$1,278,060 | -12.29% | |
| Two Sigma Investments, Lp | 0.01% | 696,714 | $10,151,123 | $8,904,005 | -$1,247,118 | -12.29% | |
| Northern Trust Corp | 0.00% | 633,794 | $9,234,379 | $8,099,887 | -$1,134,492 | -12.29% | |
| Marshall Wace, Llp | 0.01% | 577,190 | $8,409,659 | $7,376,488 | -$1,033,171 | -12.29% | |
| Aqr Capital Management Llc | 0.00% | 542,178 | $7,899,533 | $6,929,035 | -$970,498 | -12.29% | |
| Candriam S.C.A. | 0.03% | 532,432 | $7,750,071 | $6,804,481 | -$945,590 | -12.20% | |
| Susquehanna International Group, Llp | 0.01% | 521,339 | $7,595,909 | $6,662,712 | -$933,197 | -12.29% | |
| Elmind Capital, Lp | 1.81% | 493,820 | $7,194,957 | $6,311,020 | -$883,937 | -12.29% | |
| Wellington Management Group Llp | 0.00% | 441,934 | $6,438,979 | $5,647,917 | -$791,062 | -12.29% | |
| Bank Of New York Mellon Corp | 0.00% | 431,299 | $6,284,022 | $5,512,001 | -$772,021 | -12.29% | |
| Worldquant Millennium Advisors Llc | 0.02% | 431,028 | $6,280,078 | $5,508,538 | -$771,540 | -12.29% | |
| Td Asset Management Inc | 0.01% | 426,084 | $6,208,044 | $5,445,354 | -$762,690 | -12.29% | |
| Invesco Ltd. | 0.00% | 416,847 | $6,073,461 | $5,327,305 | -$746,156 | -12.29% | |
| Jump Financial, Llc | 0.05% | 389,618 | $5,676,734 | $4,979,318 | -$697,416 | -12.29% | |
| Qvt Financial Lp | 0.34% | 360,524 | $5,252,835 | $4,607,497 | -$645,338 | -12.29% | |
| Ghisallo Capital Management Llc | 0.10% | 350,000 | $5,099,500 | $4,473,000 | -$626,500 | -12.29% | |
| Hohimer Wealth Management, Llc | 0.51% | 339,100 | $4,940,687 | $4,333,698 | -$606,989 | -12.29% | |
| Manufacturers Life Insurance Company, The | 0.00% | 298,000 | $4,341,860 | $3,808,440 | -$533,420 | -12.29% | |
| Nuveen, Llc | 0.00% | 294,867 | $4,296,212 | $3,768,400 | -$527,812 | -12.29% | |
| Bnp Paribas Financial Markets | 0.00% | 274,894 | $4,005,206 | $3,513,145 | -$492,061 | -12.29% |
Frequently asked questions about SMMT
Who owns the most SMMT stock?
The largest holders of SMMT 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 SUMMIT THERAPEUTICS INC (SMMT).
Is SMMT widely held by superinvestors?
Many widely followed stocks like SMMT appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly SMMT 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.