Summit Therapeutics Inc. (SMMT) has 19 known insider and institutional holders on record. The largest holder is Soni Manmeet Singh with 3,073,603 shares. Other notable holders include Donaldson Michael Paul and Graham Camilla.
Over the last 12 months, insiders have made 25 transactions in SMMT stock — 23 buys (valued at $49.47M) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
SMMT Insider Ownership
Top Holder
Soni Manmeet Singh
3,073,603 shares
Buys (12 mo)
23
$49.47M value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Soni Manmeet Singh |
COO and CFO |
3,073,603 |
2025-10-23 |
|
| 2 |
Donaldson Michael Paul |
Chief Financial Officer |
594,890 |
2021-02-23 |
|
| 3 |
Graham Camilla |
Chief Clinical Affairs Officer |
400,000 |
2020-10-07 |
|
| 4 |
Gayko Urte |
Director |
400,000 |
2022-04-26 |
|
| 5 |
Zanganeh Maky |
Co-CEO & President |
359,969 |
2022-08-18 |
|
| 6 |
Dhingra Ankur |
Chief Financial Officer |
354,958 |
2024-03-27 |
|
| 7 |
Erdtmann Rainer M |
Director |
252,273 |
2021-02-23 |
|
| 8 |
Wang Luhua |
Director |
70,000 |
2021-03-02 |
|
| 9 |
Mahatme Ujwala |
Director |
35,000 |
2024-01-04 |
|
| 10 |
Xia Yu |
Director |
35,000 |
2026-01-06 |
|
| 11 |
Ronaghi Mostafa |
Director |
35,000 |
2026-01-06 |
|
| 12 |
Anand Bhaskar |
Chief Accounting Officer |
30,000 |
2026-01-12 |
|
| 13 |
Clark Kenneth A |
Director |
17,796 |
2026-01-06 |
|
| 14 |
Maranian Jeffrey R |
VP Corporate Controller |
15,000 |
2021-12-17 |
|
| 15 |
Zanganeh Mahkam |
10 Percent Owner, Officer: Co-chief Executive Officer |
11,232 |
2026-01-06 |
|
| 16 |
Duggan Robert W |
10 Percent Owner, Officer: Co-chief Executive Officer |
11,232 |
2026-01-06 |
|
| 17 |
Huber Jeff |
Director |
9,885 |
2026-01-06 |
|
| 18 |
Booth Robert F. |
Director |
7,180 |
2026-01-06 |
|
| 19 |
Cesano Alessandra |
Director |
3,219 |
2026-01-06 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-01-08 |
Anand Bhaskar |
Chief Accounting Officer |
RSU Award |
30,000 |
$18.83 |
$564.9K |
| 2026-01-02 |
Xia Yu |
Director |
RSU Award |
35,000 |
$17.52 |
$613.2K |
| 2026-01-02 |
Cesano Alessandra |
Director |
RSU Award |
3,219 |
$17.52 |
$56.4K |
| 2026-01-02 |
Clark Kenneth A |
Director |
RSU Award |
17,796 |
$17.52 |
$311.79K |
| 2026-01-02 |
Zanganeh Mahkam |
10 Percent Owner, Officer: Co-chief Executive Officer |
RSU Award |
11,232 |
$17.52 |
$196.78K |
| 2026-01-02 |
Booth Robert F. |
Director |
RSU Award |
7,180 |
$17.52 |
$125.79K |
| 2026-01-02 |
Huber Jeff |
Director |
RSU Award |
9,885 |
$17.52 |
$173.19K |
| 2026-01-02 |
Ronaghi Mostafa |
Director |
RSU Award |
35,000 |
$17.52 |
$613.2K |
| 2026-01-02 |
Duggan Robert W |
10 Percent Owner, Officer: Co-chief Executive Officer |
RSU Award |
11,232 |
$17.52 |
$196.78K |
| 2025-10-21 |
Xia Yu |
Director |
Informative Buy |
533,617 |
$18.74 |
$10M |
| 2025-10-21 |
Anand Bhaskar |
Chief Accounting Officer |
RSU Award |
26,680 |
$18.74 |
$499.98K |
| 2025-10-21 |
Soni Manmeet Singh |
COO and CFO |
RSU Award |
53,361 |
$18.74 |
$999.99K |
| 2025-10-21 |
Zanganeh Mahkam |
10 Percent Owner, Officer: Co-chief Executive Officer |
Informative Buy |
26,680 |
$18.74 |
$499.98K |
| 2025-10-21 |
Duggan Robert W |
10 Percent Owner, Officer: Co-chief Executive Officer |
Informative Buy |
26,680 |
$18.74 |
$499.98K |
| 2025-09-18 |
Anand Bhaskar |
Chief Accounting Officer |
RSU Award |
50,000 |
$19.23 |
$961.5K |
| 2025-09-11 |
Zanganeh Mahkam |
10 Percent Owner, Officer: Co-chief Executive Officer |
Informative Buy |
5,000 |
$18.07 |
$90.35K |
| 2025-09-10 |
Zanganeh Mahkam |
10 Percent Owner, Officer: Co-chief Executive Officer |
Informative Buy |
333,394 |
$17.68 |
$5.89M |
| 2025-09-11 |
Duggan Robert W |
10 Percent Owner, Officer: Co-chief Executive Officer |
Informative Buy |
5,000 |
$18.07 |
$90.35K |
| 2025-09-10 |
Duggan Robert W |
10 Percent Owner, Officer: Co-chief Executive Officer |
Informative Buy |
333,394 |
$17.68 |
$5.89M |
| 2025-05-30 |
Zanganeh Mahkam |
10 Percent Owner, Officer: Co-chief Executive Officer |
Option Exercise (Sell) |
74,545 |
$2.64 |
$196.8K |
| 2025-05-30 |
Duggan Robert W |
10 Percent Owner, Officer: Co-chief Executive Officer |
Option Exercise (Sell) |
74,545 |
$2.64 |
$196.8K |
| 2025-04-29 |
Anand Bhaskar |
Chief Accounting Officer |
RSU Award |
75,000 |
$17.85 |
$1.34M |
| 2025-04-29 |
Soni Manmeet Singh |
COO and CFO |
RSU Award |
11,200,000 |
$1.68 |
$18.82M |
| 2025-04-29 |
Zanganeh Mahkam |
10 Percent Owner, Officer: Co-chief Executive Officer |
RSU Award |
400,000 |
$1.29 |
$516K |
| 2025-04-29 |
Duggan Robert W |
10 Percent Owner, Officer: Co-chief Executive Officer |
RSU Award |
400,000 |
$1.29 |
$516K |
