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ISSUER PROFILE · CIK 0001599298

Summit Therapeutics Inc.SMMT

15 13D/G filings 3 distinct filers 24 insider transactions (365d)

Cross-Reference Snapshot

Activist filings
15
15 SC
Distinct filers
3
multi-activist cluster
Insiders (365d)
24
24 buys · 0 sales
Latest short DTC
11.02
as of 2026-07-15

13D/G Filings Timeline · 15 total

FiledFormFilerStakeSharesIntent
2023-03-13 SC Zanganeh Mahkam — — view →
2022-08-18 SC DUGGAN ROBERT W — — view →
2021-05-14 SC DUGGAN ROBERT W — — view →
2021-04-22 SC DUGGAN ROBERT W — — view →
2021-03-26 SC DUGGAN ROBERT W — — view →
2020-11-25 SC Zanganeh Maky — — view →
2020-11-10 SC DUGGAN ROBERT W — — view →
2020-11-10 SC Zanganeh Maky — — view →
2020-10-07 SC DUGGAN ROBERT W — — view →
2020-05-15 SC LANSDOWNE PARTNERS (UK) LLP — — view →
2020-03-26 SC LANSDOWNE PARTNERS (UK) LLP — — view →
2020-01-16 SC DUGGAN ROBERT W — — view →
2019-12-27 SC DUGGAN ROBERT W — — view →
2019-01-11 SC LANSDOWNE PARTNERS (UK) LLP — — view →
2018-01-30 SC LANSDOWNE PARTNERS (UK) LLP — — view →

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-01-08 Anand Bhaskar officer Award 30,000 $18.83 $565K
2026-01-02 Zanganeh Mahkam director, officer, 10%+ Award 11,232 $17.52 $197K
2026-01-02 DUGGAN ROBERT W director, officer, 10%+ Award 11,232 $17.52 $197K
2026-01-02 Booth Robert F. director Award 35,000 $17.52 $613K
2026-01-02 Xia Yu director Award 35,000 $17.52 $613K
2026-01-02 Huber Jeff director Award 35,000 $17.52 $613K
2026-01-02 Ronaghi Mostafa director Award 35,000 $17.52 $613K
2026-01-02 Clark Kenneth A director Award 35,000 $17.52 $613K
2026-01-02 Cesano Alessandra director Award 35,000 $17.52 $613K
2026-01-02 Huber Jeff director Award 9,885 $17.52 $173K
2026-01-02 Clark Kenneth A director Award 17,796 $17.52 $312K
2026-01-02 Cesano Alessandra director Award 3,219 $17.52 $56K
2025-10-21 Xia Yu director Buy 533,617 $18.74 $10.00M
2025-10-21 Anand Bhaskar officer Award 26,680 $18.74 $500K
2025-10-21 Soni Manmeet Singh director, officer Award 53,361 $18.74 $1000K
2025-10-21 DUGGAN ROBERT W director, officer, 10%+ Award 13,980,789 $18.74 $262.00M
2025-10-21 Zanganeh Mahkam director, officer, 10%+ Award 266,808 $18.74 $5.00M
2025-10-21 DUGGAN ROBERT W director, officer, 10%+ Award 266,808 $18.74 $5.00M
2025-10-21 DUGGAN ROBERT W director, officer, 10%+ Buy 26,680 $18.74 $500K
2025-09-18 Anand Bhaskar officer Award 50,000 $19.23 $962K
2025-09-11 DUGGAN ROBERT W director, officer, 10%+ Buy 5,000 $18.07 $90K
2025-09-11 Zanganeh Mahkam director, officer, 10%+ Buy 5,000 $18.07 $90K
2025-09-10 Zanganeh Mahkam director, officer, 10%+ Buy 333,394 $17.68 $5.89M
2025-09-10 DUGGAN ROBERT W director, officer, 10%+ Buy 333,394 $17.68 $5.89M

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-07-15 37,327,940 11.02 -6.3%
2026-06-30 39,855,640 6.69 +8.3%
2026-06-15 36,811,691 4.46 +1.9%
2026-05-29 36,126,988 8.19 +21.2%
2026-05-15 29,818,472 6.30 +2.1%
2026-04-30 29,194,577 5.57 -15.4%
2026-04-15 34,504,458 15.01 -0.2%
2026-03-31 34,558,050 12.35 -4.3%
2026-03-13 36,116,187 15.94 +4.2%
2026-02-27 34,669,041 20.25 -8.4%
2026-02-13 37,869,822 13.95 +2.5%
2026-01-30 36,964,760 12.16 -0.6%

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