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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
30 Jun 2024
the date the book describes
Filed
5 Nov 2026
latest of these filings; the earliest 9 Aug 2024
Managers listing it
35
at least, of 95 tracked, among listed positions
Comparable managers
94
filed both Q1 2024 and Q2 2024; 29 listed it in both
Shares listed
348,356,764
combined, among listed positions
Reported value
$26.8bn
combined, at the quarter end

Among the 94 comparable managers: 21 buyers (opened or added shares) and 15 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing BSX in Q2 2024

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

35 of 35 holders

ActionFiling
Fidelity (FMR LLC)141,460,666$10.9bn0.70%Trimmed-469,3475 Nov 2026 (the filing on sec.gov)
Wellington Management Group LLP32,102,313$2.5bn0.44%Trimmed-1,186,50414 Aug 2024 (the filing on sec.gov)
MFS Investment Management31,785,218$2.4bn0.75%Trimmed-14,821,7989 Aug 2024 (the filing on sec.gov)
Capital World Investors20,401,736$1.6bn0.26%Added+4,393,65113 Aug 2024 (the filing on sec.gov)
Janus Henderson Group Ltd18,317,062$1.4bn0.76%Trimmed-295,14214 Aug 2024 (the filing on sec.gov)
Artisan Partners LP14,665,656$1.1bn1.69%Trimmed-1,511,85412 Aug 2024 (the filing on sec.gov)
Invesco Ltd12,685,906$977m0.21%Added+84,70813 Aug 2024 (the filing on sec.gov)
Citadel Advisors LLC12,499,867$963m0.19%Added+3,725,80214 Aug 2024 (the filing on sec.gov)
Millennium Management LLC11,269,383$829m0.38%Added+1,789,71614 Aug 2024 (the filing on sec.gov)
T. Rowe Price Associates Inc8,071,053$622m0.07%Added+888,89314 Aug 2024 (the filing on sec.gov)
Marshall Wace LLP6,720,480$518m0.69%Added+3,608,15814 Aug 2024 (the filing on sec.gov)
Arrowstreet Capital LP4,814,472$371m0.33%Trimmed-87,33414 Aug 2024 (the filing on sec.gov)
Farallon Capital Management LLC4,109,157$316m1.36%Trimmed-487,50014 Aug 2024 (the filing on sec.gov)
Holocene Advisors LP4,040,430$311m1.30%Trimmed-1,747,56914 Aug 2024 (the filing on sec.gov)
Neuberger Berman Group LLC4,034,284$311m0.26%Added+110,95314 Nov 2024 (the filing on sec.gov)
Capital Research Global Investors3,291,200$253m0.06%Added+620,77413 Aug 2024 (the filing on sec.gov)
Point72 Asset Management LP3,125,022$241m0.63%Added+758,83316 Sep 2024 (the filing on sec.gov)
Balyasny Asset Management LLC2,916,073$225m0.39%Added+1,322,73914 Aug 2024 (the filing on sec.gov)
Steadfast Capital Management LP2,160,082$166m3.50%Trimmed-153,35714 Aug 2024 (the filing on sec.gov)
Two Sigma Investments LP1,854,285$143m0.33%Addedn.a.14 Aug 2024 (the filing on sec.gov)
AllianceBernstein LP1,814,710$140munder 0.1%Added+16,81914 Aug 2024 (the filing on sec.gov)
Bridgewater Associates LP1,171,946$90m0.47%Trimmed-172,55314 Aug 2024 (the filing on sec.gov)
Woodline Partners LP1,031,633$79m0.76%Added+844,33714 Aug 2024 (the filing on sec.gov)
D. E. Shaw & Co.818,634$63m0.06%Trimmed-580,15914 Aug 2024 (the filing on sec.gov)
AQR Capital Management LLC702,218$54m0.08%Trimmed-151,47414 Aug 2024 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q1 2024 to Q2 2024, 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 (5)

Exited (2)

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.

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