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SMMT · Summit Therapeutics Inc. · Holdings

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$17.55 +0.55 (+3.24%) At close · Sep 11
Market Cap
$14.00B
Shares
797.75M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 248
Total Value: $2,077,845,728
Total Shares: 142,611,248
Showing 1–100 of 269 holdings by value · page 1 of 3

Institutional Ownership Trend

24 quarters

Holder Concentration

Across 248 13F filers · Δ vs Mar 31, 2026
Top Holder
23.0%
Sep 2023 → Jun 2026 · range 19.7% – 31.9%
−6.6 pts
Top 5
47.4%
Sep 2023 → Jun 2026 · range 47.4% – 73.0%
−11.3 pts
Top 10
63.2%
Sep 2023 → Jun 2026 · range 63.2% – 83.2%
−12.2 pts
HHI
769
Sep 2023 → Jun 2026 · range 769 – 1,564
Broadly held−402

Quarterly Activity

vs Mar 31, 2026
New
57
Increased
101
Decreased
59
Sold Out
36
Unchanged
31
Holder count: +21
Institutional value: -10.8%
Shares held: +16.0%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 269
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1599298 CUSIP 86627T108 13F (30d) 93 filings 93 filers Visit website Investor relations