Company profile
Summit Therapeutics Inc. Insider Trading
SMMTEvery SEC Form 4 insider trading filing for Summit Therapeutics Inc. (SMMT) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- Nasdaq
- Sector
- Pharmaceutical Preparations
- CIK
- 0001599298
- Filings
- 64
- Insiders
- 12
- Last filing
- 2026-06-12
Activity summary
No insider transactions in the last 30 days. The most recent was on June 12, 2026, when Mahkam Zanganeh bought 3,810,000 shares. 64 filings from 12 insiders are on record below.
Three year balance
Buy and sell value by quarter, Q4 23 to Q2 26. Summit Therapeutics Inc. insiders are net buyers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $546.5M.
No insider activity recorded for SMMT in the last 90 days.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 12, 2026 | Mahkam Zanganeh | SMMT | Purchase | 3,810,000 | $13.12 | $49.99M |
| Jun 12, 2026 | Robert W Duggan | SMMT | Purchase | 3,810,000 | $13.12 | $49.99M |
| Jun 4, 2026 | Manmeet Singh Soni | SMMT | Purchase | 25,000 | $14.46 | $362K |
| Jun 4, 2026 | Manmeet Singh Soni | SMMT | Purchase | 25,000 | $14.43 | $361K |
| Jun 4, 2026 | Robert W Duggan | SMMT | Purchase | 100,000 | $14.60 | $1.46M |
45 more transactions hidden
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The same rows, over the API.
curl "https://api.form4api.com/v1/transactions?ticker=SMMT" \
-H "X-Api-Key: $KEY"Top insiders
By total value filed.
Institutional Ownership
Top 13F-HR holders of Summit Therapeutics Inc. as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →