BSX
Boston Scientifi (BSX)
NYSE
$45.20+$0.49 (+1.11%)
Price as of Nov 11, 2026 7:58 PM EST
  • $64.8B
    Market Cap
  • -56.39%
    1-Year Change
  • Medical Devices
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
VANGUARD GROUP INC
9.64%
139.7M
+1.4M (+1.03%)
Dec 31, 2025
BLACKROCK FUNDING, INC. /DE
9.59%
139.0M
+10.3M (+7.43%)
Dec 31, 2024
BLACKROCK, INC.
8.95%
129.7M
-2.1M (-1.65%)
Jun 30, 2026
BLACKROCK INC.
8.72%
126.4M
-417,418 (-0.33%)
Jun 30, 2024
VANGUARD CAPITAL MANAGEMENT LLC
6.70%
97.1M
+675,985 (+0.70%)
Jun 30, 2026
WELLINGTON MANAGEMENT CO LLP
5.14%
74.5M
-9.3M (-12.50%)
Dec 31, 2021
STATE STREET CORP
4.84%
70.1M
+2.1M (+3.03%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions25.1B (75.14%)
  • Mutual Funds8.2B (24.66%)
  • Insiders65.8M (0.20%)
  • Other0 (0.00%)

Insider Transactions

  • 0.20% (65.8M)
    Current InsiderOwnership (%, shares)
  • 4
    Number of InsiderBuying (last 12 months)
  • $71.7M
    Amount of InsiderBuying (last 12 months)
  • 1
    Number of InsiderSelling (last 12 months)
  • $264.7M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Mahoney Michael F
Chairman, President & CEO
Gift
Nov 04, 2026
$0.00
149,992
$0.00
149,992
Mahoney Michael F
Chairman, President & CEO
Gift
Nov 04, 2026
$0.00
102,249
$0.00
252,241
O'Sullivan Miriam
SVP, Chief HR Officer
Exempt
Nov 01, 2026
$0.00
3,871
$0.00
0
O'Sullivan Miriam
SVP, Chief HR Officer
Exempt
Nov 01, 2026
$0.00
3,871
$0.00
21,437
O'Sullivan Miriam
SVP, Chief HR Officer
In Kind
Nov 01, 2026
$78,586.56
1,872
$41.98
19,565
O'Connor Padraig Andrew
EVP, Global Operations
Exempt
Sep 02, 2026
$0.00
1,171
$0.00
3,516
O'Connor Padraig Andrew
EVP, Global Operations
Exempt
Sep 02, 2026
$0.00
1,171
$0.00
8,459
O'Connor Padraig Andrew
EVP, Global Operations
In Kind
Sep 02, 2026
$27,425.79
567
$48.37
7,892
Morano Susan E
Buy
Aug 25, 2026
$100,407.78
2,040
$49.22
13,784
Woodworth Emily
SVP, Global Controller and CAO
Discretionary
Aug 11, 2026
$149,986.70
2,930
$51.19
2,930
Monson Jonathan
EVP and CFO
Discretionary
Aug 10, 2026
$499,957.68
9,908
$50.46
9,908
Habiger David C
Buy
Aug 05, 2026
$99,936.90
2,100
$47.59
17,160
Habiger David C
Buy
Aug 04, 2026
$6,802.31
140
$48.59
15,060
Mahoney Michael F
Chairman, President & CEO
Buy
Aug 03, 2026
$9.0M
186,240
$48.33
1.6M
Habiger David C
Buy
Aug 03, 2026
$50,084.25
1,042
$48.07
14,920
Mahoney Michael F
Chairman, President & CEO
Discretionary
Aug 03, 2026
$1.1M
22,119
$48.43
22,119
Fitzgerald Joseph Michael
EVP & Group Pres, Cardiology
Discretionary
Jul 31, 2026
$3.0M
64,198
$46.73
64,198
LUDWIG EDWARD J
Buy
Jul 31, 2026
$227,399.50
5,000
$45.48
30,359
Pegus Cheryl
Award
Mar 02, 2026
$0.00
24
$0.00
5,917
Smith Cathy R
Award
Mar 02, 2026
$0.00
556
$0.00
556
Morano Susan E
Award
Mar 02, 2026
$0.00
24
$0.00
6,663
Smith Cathy R
Award
Mar 02, 2026
$0.00
323
$0.00
879
Woodworth Emily
SVP, Global Controller and CAO
Exempt
Mar 01, 2026
$0.00
838
$0.00
1,676
Woodworth Emily
SVP, Global Controller and CAO
Exempt
Mar 01, 2026
$0.00
838
$0.00
3,231
Woodworth Emily
SVP, Global Controller and CAO
In Kind
Mar 01, 2026
$28,588.20
372
$76.85
2,859
Butcher Arthur C
EVP& Grp Pres, MedSurg & APAC
Discretionary
Feb 19, 2026
$519,031.76
6,851
$75.76
20,205
O'Sullivan Miriam
SVP, Chief HR Officer
Exempt
Feb 16, 2026
$0.00
990
$0.00
0
O'Connor Padraig Andrew
EVP, Global Operations
Exempt
Feb 16, 2026
$0.00
905
$0.00
0
Monson Jonathan
EVP and CFO
Exempt
Feb 16, 2026
$0.00
990
$0.00
0
Fitzgerald Joseph Michael
EVP & Group Pres, Cardiology
Exempt
Feb 16, 2026
$0.00
3,960
$0.00
215,713