🕵️ Boston Scientific Corp ($BSX)
SEC insider & ownership activity, last 12 months · CIK 885725 · every row links its SEC filing
Over the last 12 months insiders sold $29.3M against $10.0M of open-market buying. Michael F. Mahoney sold $15.0M through a 10b5-1 trading plan in 2 lots (Feb–Aug). One red-flag 8-K in the window: Cyber incident (1.05), Sep 7, 2026.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
5 buyers, $10.0M (10 lots) · 4 sellers, $29.3M (11 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Michael F. Mahoney | 1 | $9.0M | 2 | $15.0M | Aug 3, 2026 |
| Joseph M. Fitzgerald | 0 | – | 5 | $9.9M | Nov 3, 2025 |
| Ellen M. Zane | 0 | – | 3 | $2.6M | Nov 6, 2025 |
| Arthur C. Butcher | 0 | – | 1 | $1.8M | Dec 1, 2025 |
| Edward J. Ludwig | 2 | $430K | 0 | – | Jul 31, 2026 |
| David C. Habiger | 5 | $408K | 0 | – | Aug 5, 2026 |
| Susan E. Morano | 1 | $100K | 0 | – | Aug 25, 2026 |
| Pegus Cheryl | 1 | $100K | 0 | – | May 20, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| BlackRock, Inc. | 7.6% | 13G | Apr 17, 2025 | filing ↗ | |
| Vanguard Capital Management | 7.5% | 13G | Apr 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Michael F. Mahoney | $15.0M | Feb 2, 2026 | filing ↗ |
| Arthur C. Butcher | $1.8M | Dec 1, 2025 | filing ↗ |
| Ellen M. Zane | $284K | Nov 6, 2025 | filing ↗ |
| Joseph M. Fitzgerald | $5.0M | Nov 3, 2025 | filing ↗ |
| Ellen M. Zane | $1.0M | Oct 27, 2025 | filing ↗ |
| Joseph M. Fitzgerald | $4.9M | Oct 1, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Cyber incident (1.05) | Sep 7, 2026 | filing ↗ |
| Other events (8.01) | Aug 26, 2026 | filing ↗ |
| Earnings (2.02) | Jul 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 29, 2026 | filing ↗ |
| Exit or disposal costs (2.05) | Jul 21, 2026 | filing ↗ |
| Other events (8.01) | May 18, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 18, 2026 | filing ↗ |
| Other events (8.01) | May 18, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 18, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Apr 30, 2026 | filing ↗ |
| Shareholder vote (5.07) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Earnings (2.02) | Apr 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 22, 2026 | filing ↗ |
| Other events (8.01) | Mar 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 28, 2026 | filing ↗ |
| Material agreement (1.01) | Feb 26, 2026 | filing ↗ |
| Agreement terminated (1.02) | Feb 26, 2026 | filing ↗ |
| New financial obligation (2.03) | Feb 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 26, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 18, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 18, 2026 | filing ↗ |
| Other events (8.01) | Feb 18, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 18, 2026 | filing ↗ |
| Earnings (2.02) | Feb 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 4, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 2, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 15, 2026 | filing ↗ |
| Material agreement (1.01) | Jan 14, 2026 | filing ↗ |