BSX — BOSTON SCIENTIFIC CORP
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
Others in Healthcare
Measured signals that fired on BSX
| date | signal | measured base rate |
|---|---|---|
| 2026-08-12 | Short volume far above its own normal short | -0.76% over 21 days · t = -2.79 · n = 5,897 statistically distinguishable from its control group |
| 2026-08-05 | Cluster buy: three or more insiders insider | +0.63% over 21 days · t = 1.84 · n = 3,050 not distinguishable from its control group |
| 2026-08-03 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-07-27 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-07-14 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-05-21 | Cluster buy: three or more insiders insider | +0.63% over 21 days · t = 1.84 · n = 3,050 not distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-08-11 | Woodworth Emily SVP, Global Controller and CAO | Discretionary Transaction | 2.9K | 51.19 | 150.0K |
| 2026-08-10 | Monson Jonathan EVP and CFO | Discretionary Transaction | 9.9K | 50.46 | 500.0K |
| 2026-08-05 | Habiger David C Director | Open-market purchase | 2.1K | 47.59 | 99.9K |
| 2026-08-04 | Habiger David C Director | Open-market purchase | 140 | 48.59 | 6.8K |
| 2026-08-03 | Mahoney Michael F Chairman, President & CEO | Open-market purchase | 186.2K | 48.33 | 9.0M |
| 2026-08-03 | Mahoney Michael F Chairman, President & CEO | Discretionary Transaction | 22.1K | 48.43 | 1.1M |
| 2026-08-03 | Habiger David C Director | Open-market purchase | 1.0K | 48.07 | 50.1K |
| 2026-07-31 | Fitzgerald Joseph Michael EVP & Group Pres, Cardiology | Discretionary Transaction | 64.2K | 46.73 | 3.0M |
| 2026-07-31 | LUDWIG EDWARD J Director | Open-market purchase | 5.0K | 45.48 | 227.4K |
| 2026-07-01 | Monson Jonathan EVP and CFO | Shares withheld for tax | 1.0K | 43.06 | 43.5K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| BlackRock, Inc. | 8.3B | 131.8M |
| VANGUARD CAPITAL MANAGEMENT LLC | 6.0B | 96.4M |
| FMR LLC | 4.7B | 74.2M |
| STATE STREET CORP | 4.3B | 68.0M |
| JPMORGAN CHASE & CO | 2.1B | 33.4M |
| GEODE CAPITAL MANAGEMENT, LLC | 2.1B | 33.3M |
| PRIMECAP MANAGEMENT CO/CA/ | 2.0B | 32.5M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.9B | 29.8M |
| D. E. Shaw & Co., Inc. | 1.5B | 24.3M |
| BANK OF AMERICA CORP /DE/ | 1.4B | 22.8M |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| 4 | 2026-08-12 | 2026-08-11 | on EDGAR ↗ |
| 4 | 2026-08-11 | 2026-08-10 | on EDGAR ↗ |
| 4 | 2026-08-07 | 2026-08-05 | on EDGAR ↗ |
| SCHEDULE 13G/A | 2026-08-06 | — | on EDGAR ↗ |
| 4 | 2026-08-05 | 2026-08-03 | on EDGAR ↗ |
| 4 | 2026-08-05 | 2026-08-03 | on EDGAR ↗ |
| 4 | 2026-08-03 | 2026-07-31 | on EDGAR ↗ |
| 4 | 2026-08-03 | 2026-07-31 | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- 10 Health Care Stocks Whale Activity In Today’s Session · 2026-08-21 · benzinga
- Boston Scientific Moves Up In Analyst Rankings, Passing Synopsys · 2026-08-21
- Boston Scientific Director Habiger Buys $100k of Shares Amid 54% Decline. What Does This Mean for BSX in 2026? · 2026-08-10
- Boston Scientific CEO Mahoney Buys More Than 200k Shares for $10 Million. What Does This Mean for Investors in 2026? · 2026-08-10
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