Comparable stake leader
BlackRock, Inc.
SEC ownership of BOSTON SCIENTIFIC CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000885725.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
05 Aug 2026
- Public ticker
- BSX on NYSE
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
05 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000885725
- Issuer location
- Marlborough, MA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of BOSTON SCIENTIFIC CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
05 Aug 2026
13D/G
13F
3/4/5
Lead comparable stake: 7.6%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 7.6%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
7.6%
VANGUARD CAPITAL MANAGEMENT LLC
7.5%
FMR LLC
3.1%
John E. Sununu
0%
David S. Wichmann
0%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
Company
|
7.6%
|
$11,610,305,379
113,006,671 shares
|
$0 | 31 Mar 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
7.5%
|
$6,973,232,114
111,127,205 shares
|
$0 | 31 Mar 2026 |
| FMR LLC |
13D/G
13F
Company
|
3.1%
|
$2,093,514,594
46,378,259 shares
|
-$1,329,708,164 | 30 Jun 2026 |
| John E. Sununu |
3/4/5
Director
|
0%
|
$5,009,343
54,723 shares
|
— | 08 May 2025 |
| David S. Wichmann |
3/4/5
Director
|
0%
|
$2,847,720
45,382 shares
|
— | 07 May 2026 |
| Edward J. Ludwig |
3/4/5
Director
|
0%
|
$1,380,724
30,359 shares
|
+$430,314 | 31 Jul 2026 |
| Ellen M. Zane |
3/4/5
Director
|
0%
|
$1,752,858
27,934 shares
|
-$2,573,877 | 07 May 2026 |
| David C. Habiger |
3/4/5
Director
|
0%
|
$816,627
17,160 shares
|
+$407,922 | 05 Aug 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$24,603,911.
Buys
$9,939,630
Insiders: 4
Sells
$34,543,541
Insiders: 4
Net
-$24,603,911
Shares: -149,674
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 204,322
Shares: 353,996
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 194,522 | 0 | $9,385,631 | $0 | +$9,385,631 |
| 3-6 | 9,800 | 0 | $554,000 | $0 | +$554,000 |
| 6-9 | 0 | 178,214 | $0 | $16,801,583 | -$16,801,583 |
| 9-12 | 0 | 175,782 | $0 | $17,741,958 | -$17,741,958 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 35 reporting-owner rows connected to BOSTON SCIENTIFIC CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
35
Largest Forms 3/4/5 holder
Michael F. Mahoney
Net 12M change
-$24,603,911
Latest report
11 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Michael F. Mahoney | Chairman, President & CEO, Director | $79,727,721 | -$6,041,987 | -7% | Mixed | 03 Aug 2026 |
| Daniel J. Brennan | EVP and CFO | $24,729,761 | Mixed | 18 Feb 2025 | ||
| Joseph Michael Fitzgerald | EVP & Group Pres, Cardiology | $12,727,068 | -$15,168,081 | -54% | Mixed | 31 Jul 2026 |
| Maulik Nanavaty | SVP & Pres, Neuromodulation | $10,635,480 | Mixed | 28 Feb 2022 | ||
| Arthur C. Butcher | EVP& Grp Pres, MedSurg & APAC | $5,114,854 | -$1,758,189 | -26% | Mixed | 02 May 2026 |
| John E. Sununu | Director | $5,009,343 | Mixed | 08 May 2025 | ||
| Charles J. Dockendorff | Director | $4,573,048 | Mixed | 09 May 2024 | ||
| David J. Roux | Director | $4,415,460 | Mixed | 04 May 2023 | ||
| Vance R. Brown | EVP, GC and Corp. Secretary | $4,053,654 | Mixed | 13 Feb 2026 | ||
| Edward F. Mackey | EVP, Operations | $3,176,640 | Mixed | 28 Feb 2022 | ||
| Wendy Carruthers | EVP, Human Resources | $3,100,129 | Mixed | 02 Dec 2024 | ||
| David S. Wichmann | Director | $2,847,720 | Mixed | 07 May 2026 | ||
| Jeffrey B. Mirviss Power | EVP&Pres, Periph Intervent | $2,679,664 | Filing P/S | 24 Feb 2025 | ||
| Eric Francis Yves Thepaut | EVP & Pres, Eur, Mid-East, Afr | $2,494,308 | Mixed | 10 May 2024 | ||
| Nelda J. Connors | Director | $2,164,140 | Mixed | 04 May 2023 | ||
| Jonathan Monson | EVP and CFO | $2,090,081 | Median | 10 Aug 2026 | ||
| John Bradley Sorenson | EVP, Global Operations | $1,955,420 | Filing P/S | 02 May 2025 | ||
| Ellen M. Zane | Director | $1,752,858 | -$2,573,877 | -59% | Mixed | 07 May 2026 |
| Meredith Ian T. | EVP Global Chief Med Officer | $1,684,920 | Mixed | 28 Mar 2022 | ||
| Meghan Scanlon | SVP,Pres,Urology Pelvic Health | $1,579,132 | Mixed | 01 May 2022 |
Recent insider transactions for BOSTON SCIENTIFIC CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Emily Woodworth | BSX | Common Stock | Discretionary transaction in accordance with Rule 16b-3(f) resulting in acquisition or disposition of issuer securities | 2,930 | 2,930 | 11 Aug 2026 | By 401(k) | |||
| Jonathan Monson | BSX | Common Stock | Discretionary transaction in accordance with Rule 16b-3(f) resulting in acquisition or disposition of issuer securities | 9,908 | 9,908 | 10 Aug 2026 | By 401(k) | |||
| David C. Habiger | BSX | Common Stock | Purchase | 13.9% | $99,937 | $47.59 | 2,100 | 17,160 | 05 Aug 2026 | Direct |
| David C. Habiger | BSX | Common Stock | Purchase | 0.94% | $6,802 | $48.59 | 140 | 15,060 | 04 Aug 2026 | Direct |
| David C. Habiger | BSX | Common Stock | Purchase | 7.51% | $50,084 | $48.07 | 1,042 | 14,920 | 03 Aug 2026 | Direct |
| Michael F. Mahoney | BSX | Common Stock | Discretionary transaction in accordance with Rule 16b-3(f) resulting in acquisition or disposition of issuer securities | 22,119 | 22,119 | 03 Aug 2026 | By 401(k) | |||
| Michael F. Mahoney | BSX | Common Stock | Purchase | 13.3% | $9,001,408 | $48.33 | 186,240 | 1,590,024 | 03 Aug 2026 | Direct |
| Edward J. Ludwig | BSX | Common Stock | Purchase | 19.7% | $227,400 | $45.48 | 5,000 | 30,359 | 31 Jul 2026 | Direct |
| Joseph Michael Fitzgerald | BSX | Common Stock | Discretionary transaction in accordance with Rule 16b-3(f) resulting in acquisition or disposition of issuer securities | 64,198 | 64,198 | 31 Jul 2026 | By 401(k) | |||
| Jonathan Monson | BSX | Common Stock | Tax liability | -2.52% | -1,010 | 39,063 | 01 Jul 2026 | Direct | ||
| Jonathan Monson | BSX | Common Stock | Options Exercise | 5.49% | 2,087 | 40,073 | 01 Jul 2026 | Direct | ||
| Jonathan Monson | BSX | Restricted Stock Units | Options Exercise | -25% | -2,087 | 6,263 | 01 Jul 2026 | Direct | ||
| Michael F. Mahoney | BSX | Common Stock | Gift | -100% | -386,755 | 0 | 28 May 2026 | By Trust | ||
| Cheryl Pegus | BSX | Common Stock | Purchase | $99,987 | $56.49 | 1,770 | 1,770 | 20 May 2026 | Direct | |
| Edward J. Ludwig | BSX | Common Stock | Purchase | 16.4% | $202,914 | $56.68 | 3,580 | 25,359 | 20 May 2026 | Direct |
| David C. Habiger | BSX | Common Stock | Purchase | 19.4% | $125,819 | $55.92 | 2,250 | 13,878 | 20 May 2026 | Direct |
| David C. Habiger | BSX | Common Stock | Purchase | 23.3% | $125,279 | $56.95 | 2,200 | 11,628 | 19 May 2026 | Direct |
| Ellen M. Zane | BSX | Common Stock | Award | 15.8% | 3,800 | 27,934 | 07 May 2026 | Direct | ||
| David S. Wichmann | BSX | Common Stock | Award | 9.14% | 3,800 | 45,382 | 07 May 2026 | Direct | ||
| Christophe Pierre Weber | BSX | Common Stock | Award | 330.7% | 2,907 | 3,786 | 07 May 2026 | Direct | ||
| Christophe Pierre Weber | BSX | Deferred Stock Units | Award | 2,660 | 2,660 | 07 May 2026 | Direct | |||
| Cathy R. Smith | BSX | Deferred Stock Units | Award | 683.6% | 6,009 | 6,888 | 07 May 2026 | Direct | ||
| Cheryl Pegus | BSX | Deferred Stock Units | Award | 85.9% | 5,081 | 10,998 | 07 May 2026 | Direct | ||
| Susan E. Morano | BSX | Common Stock | Award | 76.3% | 5,081 | 11,744 | 07 May 2026 | Direct | ||
| Jessica L. Mega | BSX | Common Stock | Award | 46.1% | 3,800 | 12,035 | 07 May 2026 | Direct | ||
| Edward J. Ludwig | BSX | Common Stock | Award | 21.1% | 3,800 | 21,779 | 07 May 2026 | Direct | ||
| David C. Habiger | BSX | Common Stock | Award | 67.5% | 3,800 | 9,428 | 07 May 2026 | Direct | ||
| Padraig Andrew O'Connor | BSX | Common Stock | Tax liability | -11% | -872 | 7,024 | 02 May 2026 | Direct | ||
| Padraig Andrew O'Connor | BSX | Common Stock | Options Exercise | 29.6% | 1,802 | 7,896 | 02 May 2026 | Direct | ||
| Padraig Andrew O'Connor | BSX | Restricted Stock Units | Options Exercise | -100% | -1,802 | 0 | 02 May 2026 | Direct | ||
| Arthur C. Butcher | BSX | Common Stock | Tax liability | -1.74% | -1,007 | 56,887 | 02 May 2026 | Direct | ||
| Arthur C. Butcher | BSX | Common Stock | Options Exercise | 3.77% | 2,102 | 57,894 | 02 May 2026 | Direct | ||
| Arthur C. Butcher | BSX | Restricted Stock Units | Options Exercise | -100% | -2,102 | 0 | 02 May 2026 | Direct | ||
| Cheryl Pegus | BSX | Deferred Stock Units | Award | 0.41% | 24 | 5,917 | 02 Mar 2026 | Direct | ||
| Susan E. Morano | BSX | Common Stock | Award | 0.36% | 24 | 6,663 | 02 Mar 2026 | Direct | ||
| Christophe Pierre Weber | BSX | Common Stock | Award | 879 | 879 | 02 Mar 2026 | Direct | |||
| Cathy R. Smith | BSX | Deferred Stock Units | Award | 879 | 879 | 02 Mar 2026 | Direct | |||
| Emily Woodworth | BSX | Common Stock | Tax liability | -11.5% | -372 | 2,859 | 01 Mar 2026 | Direct | ||
| Emily Woodworth | BSX | Common Stock | Options Exercise | 35% | 838 | 3,231 | 01 Mar 2026 | Direct | ||
| Emily Woodworth | BSX | Restricted Stock Units | Options Exercise | -33.3% | -838 | 1,676 | 01 Mar 2026 | Direct | ||
| Arthur C. Butcher | BSX | Common Stock | Discretionary transaction in accordance with Rule 16b-3(f) resulting in acquisition or disposition of issuer securities | 51.3% | 6,851 | 20,205 | 19 Feb 2026 | By 401(k) | ||
| Padraig Andrew O'Connor | BSX | Common Stock | Tax liability | -5.27% | -339 | 6,094 | 16 Feb 2026 | Direct | ||
| Padraig Andrew O'Connor | BSX | Common Stock | Options Exercise | 16.4% | 905 | 6,433 | 16 Feb 2026 | Direct | ||
| Padraig Andrew O'Connor | BSX | Restricted Stock Units | Options Exercise | -100% | -905 | 0 | 16 Feb 2026 | Direct | ||
| Emily Woodworth | BSX | Common Stock | Tax liability | -10.6% | -283 | 2,393 | 16 Feb 2026 | Direct | ||
| Emily Woodworth | BSX | Common Stock | Options Exercise | 31.2% | 637 | 2,676 | 16 Feb 2026 | Direct | ||
| Emily Woodworth | BSX | Restricted Stock Units | Options Exercise | -100% | -637 | 0 | 16 Feb 2026 | Direct | ||
| Jonathan Monson | BSX | Common Stock | Tax liability | -1.15% | -440 | 37,986 | 16 Feb 2026 | Direct | ||
| Jonathan Monson | BSX | Common Stock | Options Exercise | 2.64% | 990 | 38,426 | 16 Feb 2026 | Direct | ||
| Jonathan Monson | BSX | Restricted Stock Units | Options Exercise | -100% | -990 | 0 | 16 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.