ITOS insider buying – iTeos Therapeutics, Inc.
8 insider purchases since 2016 worth $76.7M by 6 different insiders. Last 12 months: 0 purchases, $0. Most recent filing: 2025-05-16.
Same time range as the chart above - each mark sits under the week of the trade. Circles = purchases (height = price paid, size = amount), red triangles = open-market sales of $50k+. Prices as reported, not adjusted for later stock splits. 3 older purchases (before the 5-year window) are listed in the table below.
Purchases are open-market buys (SEC Form 4, code "P") - insiders paying with their own money. Sales are open-market sales (code "S") of $50,000 or more; many sales are pre-planned (Rule 10b5-1) or made for taxes and diversification. Each row links to the original filing.
Bought, sold, still holding?
| Insider | Bought | First / last buy | Sold since 2016 | Holds now* | Status |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC 10% Owner | $38.7M 1× · 4,958,978 sh | 2025-05-14 2025-05-14 | – | 7,388,978 shares as of 2025-05-16 | Holds - never sold |
| Boxer Asset Management Inc. 10% Owner | $27.1M 1× · 1,425,000 sh | 2020-07-28 2020-07-28 | – | 48,691 shares as of 2020-07-29 | Holds - never sold |
| MPM Oncology Impact Management GP LLC Director | $6.1M 1× · 320,000 sh | 2020-07-28 2020-07-28 | – | 25,974 shares as of 2020-07-30 | Holds - never sold |
| MPM BioVentures 2014 GP LLC 10% Owner | $3.0M 1× · 160,000 sh | 2020-07-28 2020-07-28 | – | 1,993,932 shares as of 2020-07-29 | Holds - never sold |
| Davis Aaron I. Director | $1.6M 1× · 50,000 sh | 2022-03-22 2022-03-22 | 3× · $29.9M last 2023-08-23 | 2,946,915 shares as of 2024-05-14 | Sold part |
| Gall Matthew CFO | $210,950 3× · 15,000 sh | 2021-06-16 2024-11-19 | 1× · $232,250 last 2021-12-27 | 0 shares as of 2025-08-29 | Sold everything |
* Shares held after the insider's most recent SEC filing for this company (all share classes, direct and indirect). If an insider stops filing, later changes are not known.
Insider buying and selling by year
| Year | Purchases | Bought | Buyers | Sales | Sold |
|---|---|---|---|---|---|
| 2025 | 1 | $38.7M | 1 | 5 | $17.2M |
| 2024 | 1 | $38,650 | 1 | – | – |
| 2023 | 1 | $41,850 | 1 | 1 | $5.7M |
| 2022 | 1 | $1.6M | 1 | 17 | $97.7M |
| 2021 | 1 | $130,450 | 1 | 50 | $71.0M |
| 2020 | 3 | $36.2M | 3 | – | – |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2025-05-16 | EcoR1 Capital, LLC | 10% Owner | 4,958,978 | $7.80 | $38.7M | +86.5% | SEC |
| 2024-11-19 | Gall Matthew | CFO | 5,000 | $7.73 | $38,650 | +8.3% | SEC |
| 2023-10-12 | Gall Matthew | CFO | 5,000 | $8.37 | $41,850 | +34.7% | SEC |
| 2022-03-24 | Davis Aaron I. | Director | 50,000 | $32.51 | $1.6M | +1.6% | SEC |
| 2021-06-16 | Gall Matthew | CFO | 5,000 | $26.09 | $130,450 | SEC | |
| 2020-07-30 | MPM Oncology Impact Management GP LLC | Director | 320,000 | $19.00 | $6.1M | +15.7% | SEC |
| 2020-07-29 | MPM BioVentures 2014 GP LLC | 10% Owner | 160,000 | $19.00 | $3.0M | +8.3% | SEC |
| 2020-07-29 | Boxer Asset Management Inc. | 10% Owner | 1,425,000 | $19.00 | $27.1M | +48.8% | SEC |
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2025-06-11 | Detheux Michel | CEO | 104,565 | $10.03 | $1.0M | Sale | SEC |
| 2025-06-06 | Hallal David | Director | 114,682 | $10.15 | $1.2M | Sale | SEC |
| 2025-06-06 | Detheux Michel | CEO | 156,847 | $10.15 | $1.6M | Sale | SEC |
| 2025-05-15 | MPM BioImpact LLC | Other | 1,031,931 | $8.06 | $8.3M | Sale | SEC |
| 2025-05-15 | MPM BIOVENTURES 2018 (B), L.P. | Other | 630,191 | $8.06 | $5.1M | Sale | SEC |
| 2023-08-25 | Davis Aaron I. | Other | 350,000 | $16.26 | $5.7M | Sale | SEC |
| 2022-06-10 | Hallal David | Director | 29,615 | $20.17 | $597,214 | Sale | SEC |
| 2022-05-11 | Davis Aaron I. | Director | 663,000 | $21.04 | $14.0M | Sale | SEC |
| 2022-05-02 | Davis Aaron I. | Director | 375,000 | $27.32 | $10.2M | Sale | SEC |
| 2022-04-19 | Detheux Michel | CEO | 11,500 | $31.87 | $366,530 | Sale | SEC |
| 2022-03-22 | Detheux Michel | CEO | 18,437 | $34.17 | $629,987 | Sale | SEC |
| 2022-03-18 | Boxer Capital, LLC | 10% Owner | 575,201 | $35.25 | $20.3M | Sale | SEC |
| 2022-03-14 | Lager Joanne Jenkins | Officer | 3,500 | $36.01 | $126,035 | Sale | SEC |
| 2022-03-02 | McGrath Yvonne | Officer | 10,000 | $36.76 | $367,600 | Sale | SEC |
| 2022-02-24 | Detheux Michel | CEO | 14,500 | $34.34 | $497,905 | Sale | SEC |
Showing the latest 15 of 73 sales of $50,000+ since 2016.
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
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