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BSX in the 13F filings

Boston Scientific Corp · CUSIP 101137107

Sector · Medical devices and instrumentsTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Surgical, medical and electromedical devices
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
51
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 47 listed it in both
Shares listed
300,215,586
combined, among listed positions
Reported value
$28.6bn
combined, at the quarter end

Among the 92 comparable managers: 28 buyers (opened or added shares) and 22 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -5,504,247.

Managers listing BSX in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

51 of 51 holders

ActionFiling
Fidelity (FMR LLC)97,386,941$9.3bn0.47%Trimmed-2,090,76017 Feb 2026 (the filing on sec.gov)
Capital World Investors27,151,575$2.6bn0.35%Added+502,62711 Feb 2026 (the filing on sec.gov)
Invesco Ltd13,318,177$1.3bn0.12%Trimmed-3,645,16719 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd12,589,385$1.2bn0.54%Added+617,51517 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.11,249,204$1.1bn0.59%Added+2,338,84917 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP11,035,628$1.1bn0.62%Added+2,668,23013 Feb 2026 (the filing on sec.gov)
Millennium Management LLC11,264,790$1.0bn0.43%Added+2,739,96917 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP9,709,089$926m0.16%Trimmed-4,944,35217 Feb 2026 (the filing on sec.gov)
MFS Investment Management9,085,528$866m0.28%Trimmed-1,281,76522 Jan 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc7,457,286$711m0.08%Trimmed-920,04017 Feb 2026 (the filing on sec.gov)
Farallon Capital Management LLC7,439,564$709m3.07%Added+2,693,00717 Feb 2026 (the filing on sec.gov)
Capital Research Global Investors7,084,055$675m0.12%Added+450,32211 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP6,298,460$601m1.17%Added+958,70017 Feb 2026 (the filing on sec.gov)
Egerton Capital UK LLP5,385,084$513m5.58%Added+72,58011 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC4,775,618$455m0.07%Trimmed-4,130,62717 Feb 2026 (the filing on sec.gov)
Holocene Advisors LP4,471,089$426m0.90%Added+1,520,22417 Feb 2026 (the filing on sec.gov)
Man Group PLC4,392,725$419m0.71%Added+548,78817 Feb 2026 (the filing on sec.gov)
Polen Capital Management LLC4,019,552$383m1.64%Trimmed-1,578,73412 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC4,010,261$382m0.28%Added+21,79827 Oct 2026 (the filing on sec.gov)
Jane Street Group LLC3,793,236$362m0.05%Added+814,95012 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC3,035,288$289m0.31%Added+1,200,12713 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP2,957,237$282m0.26%Trimmed-6,841,80313 Feb 2026 (the filing on sec.gov)
Maverick Capital Ltd2,944,254$281m3.01%Newnew13 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP2,800,729$267m0.08%Trimmed-185,74917 Feb 2026 (the filing on sec.gov)
Artisan Partners LP2,569,376$245m0.37%Trimmed-2,186,78617 Feb 2026 (the filing on sec.gov)
Page 1 of 3

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (2)

Exited (0)

No exit shown by a manager’s own filing.

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
40 in Q3 2024 to 40 in Q2 2026

Tracked managers listing it, at least.

02040602014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
BSX by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201313$3.9bnn.a.n.a.
Q3 201317$5.3bnn.a.n.a.
Q4 201315$4.8bnn.a.n.a.
Q1 201412$5.6bnn.a.n.a.
Q2 201415$5.1bnn.a.n.a.
Q3 201421$5.1bnn.a.n.a.
Q4 201416$5.3bnn.a.n.a.
Q1 201518$6.7bnn.a.n.a.
Q2 201519$6.9bnn.a.n.a.
Q3 201519$6.8bnn.a.n.a.
Q4 201520$7.4bnn.a.n.a.
Q1 201617$8.3bnn.a.n.a.
Q2 201624$10.6bnn.a.n.a.
Q3 201626$10.4bnn.a.n.a.
Q4 201625$9.2bnn.a.n.a.
Q1 201723$11.1bnn.a.n.a.
Q2 201726$12.7bnn.a.n.a.
Q3 201724$13.4bnn.a.n.a.
Q4 201730$11.5bnn.a.n.a.
Q1 201832$12.4bnn.a.n.a.
Q2 201825$15.3bnn.a.n.a.
Q3 201828$17.9bnn.a.n.a.
Q4 201828$16.2bnn.a.n.a.
Q1 201931$16.9bnn.a.n.a.
Q2 201923$19.2bnn.a.n.a.
Q3 201923$18.2bnn.a.n.a.
Q4 201926$19.7bnn.a.n.a.
Q1 202031$13.5bnn.a.n.a.
Q2 202029$14.1bnn.a.n.a.
Q3 202031$15.0bnn.a.n.a.
Q4 202035$13.6bnn.a.n.a.
Q1 202129$15.7bnn.a.n.a.
Q2 202127$18.2bnn.a.n.a.
Q3 202127$18.2bnn.a.n.a.
Q4 202126$17.4bnn.a.n.a.
Q1 202232$17.4bnn.a.n.a.
Q2 202230$14.0bnn.a.n.a.
Q3 202229$14.5bnn.a.n.a.
Q4 202226$16.6bnn.a.n.a.
Q1 202332$18.5bnn.a.n.a.
Q2 202337$19.6bnn.a.n.a.
Q3 202333$19.7bnn.a.n.a.
Q4 202330$20.6bn1419
Q1 202433$24.0bn1319
Q2 202435$26.8bn2115
Q3 202440$28.3bn2515
Q4 202440$29.4bn1821
Q1 202544$33.1bn2221
Q2 202544$33.6bn2421
Q3 202548$29.5bn2919
Q4 202549$28.5bn2822
Q1 202645$17.2bn2327
Q2 202640$13.0bn3021

Compare with…

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How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own BSX, latest filings →Back to the 13F Explorer →