13F Insight
DOSSIER · 13F Holders · Q4 2025Healthcare · Pharmaceutical Preparations
SMMT

SUMMIT THERAPEUTICS INC

257 institutions still hold SUMMIT THERAPEUTICS INC as of Q4 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 86627T108·Pharmaceutical Preparations·257 13F holders·last filed Dec 31, 2025
Market cap
—
13F value held
$1.8B
visible holders
Holders
257
filers reporting
Concentration
34.45%
BAKER BROS. ADVISORS LP #1
top holder share
AI Holders Summary · Q4 2025

Summit Therapeutics' Q2 2026 tracked ownership is effectively a near-zero institutional snapshot: CX Institutional shows 591 shares worth , while MassMutual Private Wealth & Trust has fallen to zero shares from 5. The only concrete changes are reductions—CX cut from 848 to 591 shares and MassMutual exited its tiny position—so SMMT's visible holder base is not just narrow, it is almost immaterial by reported value.

Analysis generated by 13F Insight from SEC Form 13F filing data · Q4 2025. Methodology

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BAKER BROS. ADVISORS LP
CIK 0001263508
$636M36.4M3.73%Q4 202502
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$157M8.3M0.02%Q1 202603
FMR LLC
CIK 0000315066
$146M10.0M0.01%Q2 202604
STATE STREET CORP
CIK 0000093751
$139M9.5M0.00%Q2 202605
BlackRock, Inc.
CIK 0002012383
$139M9.5M0.00%Q2 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$84M5.7M0.00%Q2 202607
UBS Group AG
CIK 0001610520
$77M5.3M0.01%Q2 202608
Vanguard Portfolio Management
CIK 0002100121· Index
$73M5.0M0.00%Q2 202609
GOLDMAN SACHS GROUP INC
CIK 0000886982
$66M4.5M0.01%Q2 202610
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$50M3.4M0.00%Q2 202611
CITADEL ADVISORS LLC
CIK 0001423053
$42M2.9M0.00%Q2 202612
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$35M2.4M0.00%Q2 202613
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$34M2.3M0.01%Q2 202614
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
$29M2.0M0.04%Q2 202615
BALYASNY ASSET MANAGEMENT L.P.
CIK 0001218710
$28M1.9M0.03%Q2 202616
Squarepoint Ops LLC
CIK 0001642575
$27M1.8M0.03%Q2 202617
Aberdeen Group plc
CIK 0001716774
$25M1.7M0.03%Q2 202618
MORGAN STANLEY
CIK 0000895421
$21M1.5M0.00%Q2 202619
NORGES BANK
CIK 0001374170· Sovereign
$20M1.4M0.00%Q2 202620
Logos Global Management LP
CIK 0001792126
$20M1.4M0.85%Q2 2026
Page 1 of 13
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Insiders at SUMMIT THERAPEUTICS INC
Zanganeh Mahkam →Duggan Robert W →Xia Yu →Anand Bhaskar →Soni Manmeet Singh →Cesano Alessandra →Huber Jeff →Ronaghi Mostafa →