As of April 22, 2026, the three largest insider holders of BSX are Michael F Mahoney (Chairman, President Ceo, 1.58Mn shares), Joseph Michael Fitzgerald (Evp Group Pres, Cardiology, 213.91K shares), Michael F Mahoney (Chairman, President Ceo, 213.68K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Michael F Mahoney | Chairman, President Ceo | 1,576,860 | 0 | 18 Feb, 2026 |
| Joseph Michael Fitzgerald | Evp Group Pres, Cardiology | 213,907 | 0 | 18 Feb, 2026 |
| Michael F Mahoney | Chairman, President Ceo | 0 | 213,679 | 31 Oct, 2025 |
| Vance R Brown | Evp, Gc And Corp. Secretary | 54,244 | 0 | 18 Feb, 2026 |
| Edward F Mackey | Evp, Operations | 52,944 | 0 | 02 Mar, 2022 |
| David S Wichmann | - | 41,582 | 0 | 09 May, 2025 |
| Jonathan Monson | Evp And Cfo | 37,986 | 0 | 18 Feb, 2026 |
| Eric Francis Yves Thepaut | Evp Pres, Eur, Mid East, Afr | 31,422 | 0 | 13 May, 2024 |
| Ian T Meredith | Evp Global Chief Med Officer | 28,082 | 0 | 29 Mar, 2022 |
| Jeffrey B. Mirviss | Evppres, Periph Intervent | 25,766 | 0 | 25 Feb, 2025 |
| Meghan Scanlon | Svp,Pres,Urology Pelvic Health | 24,461 | 0 | 02 May, 2022 |
| Ellen M Zane | - | 24,134 | 0 | 06 Nov, 2025 |
| Jodi Euerle Eddy | Svp, Chief Info Digital Off. | 23,263 | 0 | 04 Apr, 2022 |
| John Bradley Sorenson | Evp, Global Operations | 18,705 | 0 | 05 May, 2025 |
| Miriam O'Sullivan | Svp, Chief Hr Officer | 17,302 | 0 | 18 Feb, 2026 |
| Scott Olson | Svp Pres, Crm, Diagnostics | 14,518 | 0 | 01 Apr, 2022 |
| Jessica L Mega | - | 8,235 | 0 | 09 May, 2025 |
| Joseph Michael Fitzgerald | Evp Pres, Cardiology | 0 | 7,428 | 17 Feb, 2022 |
| Susan E Morano | - | 6,663 | 0 | 04 Mar, 2026 |
| Padraig Andrew O'Connor | Evp, Global Operations | 6,094 | 0 | 18 Feb, 2026 |
| Joseph Michael Fitzgerald | Evp Group Pres, Cardiology | 0 | 5,234 | 26 Feb, 2025 |
| Emily Woodworth | Svp, Global Controller And Cao | 2,859 | 0 | 03 Mar, 2026 |
| Miriam O'Sullivan | Svp, Chief Hr Officer | 0 | 1,731 | 18 Feb, 2025 |
| Christophe Pierre Weber | - | 879 | 0 | 04 Mar, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 02 Mar, 2026 | Christophe Pierre Weber | Common Stock | A | 556 | $0.00 | 556 | D | A |
| 02 Mar, 2026 | Susan E Morano | Common Stock | A | 24 | $0.00 | 6,663 | D | A |
| 02 Mar, 2026 | Cathy R Smith | Deferred Stock Units | A | 556 | $0.00 | 556 | D | A |
| 02 Mar, 2026 | Christophe Pierre Weber | Common Stock | A | 323 | $0.00 | 879 | D | A |
| 02 Mar, 2026 | Cathy R Smith | Deferred Stock Units | A | 323 | $0.00 | 879 | D | A |
| 01 Mar, 2026 | Emily Woodworth | Common Stock | A | 838 | $0.00 | 3,231 | D | M |
| 01 Mar, 2026 | Emily Woodworth | Common Stock | D | 372 | $76.85 | 2,859 | D | F |
| 01 Mar, 2026 | Emily Woodworth | Restricted Stock Units | D | 838 | $0.00 | 1,676 | D | M |
| 13 Feb, 2026 | Michael F Mahoney | Common Stock | A | 132,190 | $0.00 | 1,551,003 | D | A |
| 13 Feb, 2026 | Vance R Brown | Common Stock | A | 14,804 | $0.00 | 49,209 | D | A |
| 13 Feb, 2026 | Padraig Andrew O'Connor | Common Stock | A | 500 | $0.00 | 4,986 | D | M |
| 13 Feb, 2026 | Joseph Michael Fitzgerald | Common Stock | A | 34,898 | $0.00 | 204,790 | D | A |
| 13 Feb, 2026 | Emily Woodworth | Common Stock | A | 1,413 | $0.00 | 2,364 | D | M |
| 13 Feb, 2026 | Miriam O'Sullivan | Common Stock | A | 588 | $0.00 | 16,008 | D | M |
| 13 Feb, 2026 | Jonathan Monson | Common Stock | A | 1,766 | $0.00 | 37,636 | D | M |
| 13 Feb, 2026 | Miriam O'Sullivan | Common Stock | D | 200 | $74.73 | 15,808 | D | F |
| 13 Feb, 2026 | Emily Woodworth | Common Stock | D | 690 | $74.73 | 1,674 | D | F |
| 13 Feb, 2026 | Jonathan Monson | Common Stock | D | 788 | $74.73 | 36,848 | D | F |
| 13 Feb, 2026 | Padraig Andrew O'Connor | Common Stock | D | 199 | $74.73 | 4,787 | D | F |
| 13 Feb, 2026 | Joseph Michael Fitzgerald | Common Stock | A | 34,898 | $0.00 | 239,688 | D | A |