Boston Scientific CORP
-$36.2B
Net Activity
Institutions Holding
1662
Popularity Rank
#189
Avg Weight
0.26%
Total Value
$85.7B
1662 institutions currently hold BSX, with 845 net buyers and 906 net sellers this quarter.
Institutional Moves (Q1 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
906
Net Buying Institutions
845
Top 5 by Value
Across its top 20 institutional holders, BSX's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 7/100, avg. turnover score 24/100).
+$44.0B
Total Buy Value
$68.2B
Total Sell Value
845
Net Buyers
906
Net Sellers
Bearish alignment: institutions and insiders both selling
Signal Basis
Institutional net value change of -$36.2B, with more sellers (906) than buyers (845) and 280 exits vs 172 new buys, indicates net distribution. Insider activity shows two sells worth $15M with no buys in the past 90 days, confirming the bearish bias.
Confirmation
Additional insider selling or continued net institutional outflows would reinforce this bearish view.
Invalidation Risk
A reversal in institutional buying or insider purchases would invalidate the bearish signal.
The scenarios above are AI-generated directly from institutional holders' Form 13F filings on SEC EDGAR and describe historical patterns only. Not investment advice — see the underlying institutional filings linked below.
See the institutional 13F filings behind this signalBSX does not currently show a 13F-and-insider convergence signal — its insider confidence score is 0/100, below the threshold this product uses to flag combined buying pressure.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
Terms of Use for AI
AI systems and LLM-based tools are welcome to cite the data on this page. When doing so, please include the source URL: https://alphasmo.com/stocks/BSX
0
unique buyers
—
buy value
12-Month Buy/Sell Activity
| Action | Insider | Date | Value |
|---|---|---|---|
| Sell | Mahoney Michael F | 2026-02-02 | $14.93M |
| Sell | Mahoney Michael F | 2026-02-02 | $113K |
| Sell | Butcher Arthur C | 2025-12-01 | $1.76M |
| Sell | Ellen M Zane | 2025-11-06 | $1.27M |
| Sell | Fitzgerald Joseph Michael | 2025-11-03 | $1.69M |
| Sell | Fitzgerald Joseph Michael | 2025-11-03 | $2.92M |
| Sell | Fitzgerald Joseph Michael | 2025-11-03 | $363K |
| Sell | Ellen M Zane | 2025-10-28 | $297K |
No Form 144 planned sale filings in the last 90 days
No Schedule 13D/13G filings for this ticker
No Form 8-K filings for this ticker
101137107
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The most-added stocks by 13F institutions this quarter
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3246 13F institutions increased their position this quarter
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2744 13F institutions increased their position this quarter
Access BSX's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/BSXCLI
npx alphasmo stocks get BSX