Michael F. Mahoney is CEO & Chairman +1 at BOSTON SCIENTIFIC CORP (BSX). They have made 27 open-market trades across 2 companies since 2012, most recently 2026-05-28.
CIK 0001533022
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
4 open-market purchases totalling $3.3M since 2012, against 23 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| BSX | 1,551,003 | $68.8M |
| CVS | 6,345 | $586K |
| BAX | 9,692 | $245K |
| Total | $69.7M |
Shares reported on the most recent Form 4, priced at the 2026-02-18 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| BSX | SELL | 2026-02-02 | 2026-02-03 | $93.49 | $15.0M | -8.2% | -10.3% | -30.1% |
| BSX | SELL · 10b5-1 | 2025-06-02 | 2025-06-03 | $103.69 | $34.1M | -3.3% | +1.1% | +3.4% |
| BSX | SELL · 10b5-1 | 2025-05-01 | 2025-05-05 | $102.48 | $33.7M | +1.5% | -0.9% | +3.4% |
| BSX | SELL · 10b5-1 | 2025-04-01 | 2025-04-02 | $100.01 | $32.9M | -2.8% | +8.2% | +8.1% |
| CVS | BUY | 2025-02-18 | 2025-02-19 | $66.70 | $2.0M | -2.0% | +1.2% | -3.8% |
| BSX | SELL · 10b5-1 | 2024-11-05 | 2024-11-07 | $84.75 | $27.6M | +3.2% | +1.3% | +19.9% |
| BSX | SELL · 10b5-1 | 2024-10-07 | 2024-10-08 | $84.63 | $27.6M | +4.1% | +2.7% | +7.9% |
| BSX | SELL · 10b5-1 | 2024-09-05 | 2024-09-06 | $81.17 | $26.4M | +0.3% | +2.6% | +10.0% |
| CVS | BUY | 2024-05-02 | 2024-05-02 | $54.49 | $1.0M | +1.4% | +9.0% | +9.3% |
| BSX | SELL | 2023-11-06 | 2023-11-07 | $52.51 | $11.9M | +3.6% | +4.9% | +22.9% |
| BSX | SELL | 2023-10-09 | 2023-10-10 | $52.09 | $11.8M | -6.6% | -4.0% | +9.1% |
| BSX | SELL | 2023-09-12 | 2023-09-12 | $53.91 | $12.2M | +0.4% | -8.9% | +3.5% |
| BSX | SELL | 2022-11-07 | 2022-11-08 | $41.97 | $10.6M | +2.3% | +10.3% | +13.5% |
| BSX | SELL | 2022-10-03 | 2022-10-04 | $39.34 | $9.9M | -1.5% | +2.3% | +13.3% |
| BSX | SELL | 2022-09-06 | 2022-09-07 | $40.49 | $10.2M | -0.0% | -3.5% | +9.6% |
| BSX | SELL | 2022-08-08 | 2022-08-09 | $40.97 | $10.3M | +0.6% | +2.2% | +0.4% |
| BSX | SELL | 2021-11-01 | 2021-11-02 | $43.05 | $17.3M | -2.4% | -8.1% | -0.5% |
| BSX | SELL | 2021-10-04 | 2021-10-05 | $42.92 | $17.3M | +2.9% | +0.8% | +2.2% |
| BSX | SELL | 2021-09-07 | 2021-09-08 | $44.57 | $17.9M | -4.1% | -5.1% | -9.0% |
| BSX | SELL | 2021-08-02 | 2021-08-04 | $45.74 | $18.4M | +0.5% | +1.1% | -2.8% |
| BSX | SELL | 2021-07-06 | 2021-07-08 | $43.41 | $17.5M | -2.0% | +0.3% | -1.8% |
| BSX | SELL | 2020-11-03 | 2020-11-04 | $35.06 | $18.2M | +5.7% | -4.3% | +1.9% |
| BSX | SELL | 2018-11-01 | 2018-11-02 | $36.35 | $8.5M | -2.1% | +4.2% | +3.2% |
| BSX | SELL | 2018-10-01 | 2018-10-02 | $38.80 | $9.1M | -5.3% | -5.3% | -9.5% |
| BSX | SELL | 2018-09-10 | 2018-09-11 | $35.88 | $8.4M | +4.7% | -0.2% | +0.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.