Form 13-F position report

BOSTON SCIENTIFIC CORP

Reported by Bayesian Capital Management LP

Company profile Manager portfolio Source filing
BSX CUSIP 101137107 Manager CIK 0001632551
Latest reported change

First reported at 23,600 shares this quarter.

New
% of reported 13F value 1.81% This manager · Q1 2026
Shares 23,600 Quarter-end amount reported
Reported value $1,480,900 Fair value at quarter end
Consecutive quarters held 26 Through Q1 2026

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Manager history

Quarterly position history

How this manager's reported quarter-end position changed over time.

20 quarters
Quarter Activity Shares Change % of reported 13F Reported value Filed
Q2 2026 Added 48,500 +24,900 (105.5%) 1.32% $2,069,980 2026-08-14
Q1 2026 New 23,600 +23,600 (0.0%) 1.81% $1,480,900 2026-05-15
Q4 2025 Reduced 0 -55,200 (-100.0%) 0 $0 2026-02-17
Q3 2025 New 55,200 +55,200 (0.0%) 1.1% $5,389,176 2025-11-14
Q2 2025 Reduced 0 -4,900 (-100.0%) 0 $0 2025-08-14
Q1 2025 Reduced 4,900 -8,200 (-62.6%) 0.08% $494,312 2025-05-15
Q4 2024 Reduced 13,100 -23,700 (-64.4%) 0.14% $1,170,092 2025-02-14
Q3 2024 Reduced 36,800 -6,500 (-15.0%) 0.36% $3,083,840 2024-11-14
Q2 2024 Reduced 43,300 -900 (-2.0%) 0.38% $3,334,533 2024-08-14
Q1 2024 Reduced 44,200 -1,200 (-2.6%) 0.29% $3,027,258 2024-05-15
Q4 2023 Added 45,400 +22,000 (94.0%) 0.28% $2,624,574 2024-02-14
Q3 2023 Added 23,400 +12,800 (120.8%) 0.14% $1,235,520 2023-11-14
Q2 2023 Reduced 10,600 -75,200 (-87.6%) 0.06% $573,354 2023-08-14
Q1 2023 Added 85,800 +60,712 (242.0%) 0.53% $4,292,574 2023-05-15
Q4 2022 New 25,088 +25,088 (0.0%) 0.17% $1,160,822 2023-02-14
Q3 2022 Reduced 0 -53,788 (-100.0%) 0 $0 2022-11-14
Q2 2022 Added 53,788 +3,100 (6.1%) 0.37% $2,005,000 2022-08-15
Q1 2022 Reduced 50,688 -46,901 (-48.1%) 0.34% $2,245,000 2022-05-16
Q4 2021 Added 97,589 +56,200 (135.8%) 1.31% $4,146,000 2022-02-14
Q3 2021 Added 41,389 +27,600 (200.2%) 0.52% $1,796,000 2021-11-15
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Institutional context

Who else reported the position

1970 managers reported BOSTON SCIENTIFIC CORP for Q1 2026.

Manager Activity Shares Change % of reported 13F Reported value Tenure
BlackRock Inc Reduced 131,822,037 -4,165,208 0.14% $8,271,832,842 7 qtrs
VANGUARD CAPITAL MANAGEMENT LLC New 96,411,568 +96,411,568 0.15% $6,049,825,893 1 qtr
FMR LLC Reduced 74,226,395 -23,160,546 0.25% $4,657,706,307 52 qtrs
STATE STREET CORPORATION Added 67,986,847 +2,140,788 0.15% $4,266,174,649 52 qtrs
JPMorgan Chase & Co Added 33,350,157 +7,977,271 0.13% $2,098,725,515 52 qtrs
GEODE CAPITAL MANAGEMENT LLC Added 33,285,757 +901,992 0.13% $2,079,209,964 52 qtrs
PRIMECAP MANAGEMENT CO CA Added 32,529,774 +1,433,590 1.61% $2,041,243,323 52 qtrs
VANGUARD PORTFOLIO MANAGEMENT LLC New 29,796,211 +29,796,211 0.1% $1,869,712,240 1 qtr
D E Shaw & Co Inc Added 24,312,352 +13,063,148 0.92% $1,525,600,089 52 qtrs
Bank of America Corporation Reduced 22,756,646 -2,358,539 0.1% $1,427,979,507 52 qtrs
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Filing details and methodology As reported
Report period
March 31, 2026
Filed
May 15, 2026
Filing type
13F-HR
Position type
COM

Voting authority reported

Sole
23,600
Shared
0
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.