Security record · archived quarter
BSX
Boston Scientific Corporation · Healthcare · Medical - Devices
185Tracked holders
-2Δ holders
1.08BShares held
$67.75BReported value
+2New positions
−5Exits
Momentum inputs (comparable managers):
holder breadth -1.1% ·
share flow +0.7% ·
net new positions -1.6%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 182 | -1 | 1.07B | $45.95B | +3 | −3 |
| Q1 2026 | 185 | -2 | 1.08B | $67.75B | +2 | −5 |
| Q4 2025 | 186 | +1 | 1.13B | $107.60B | +2 | — |
| Q3 2025 | 28 | 0 | 719.46M | $70.18B | — | −1 |
| Q2 2025 | 26 | -1 | 668.30M | $71.71B | — | −1 |
| Q1 2025 | 24 | +1 | 275.71M | $27.75B | +1 | — |
| Q4 2024 | 23 | -1 | 268.54M | $23.93B | — | −1 |
| Q3 2024 | 23 | +2 | 200.54M | $16.75B | +2 | — |
| Q2 2024 | 21 | — | 195.84M | $15.04B | — | — |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 131.82M | -3.1% | $8.27B | 0.1% | ▼ Trim | 4 | SEC ↗ ×22 |
| 2 | Vanguard Capital Management Llc | 96.41M | — | $6.05B | 0.1% | n/c | 1 | SEC ↗ |
| 3 | Fidelity (FMR) ✦ | 74.23M | -23.8% | $4.66B | 0.2% | ▼ Trim | 4 | SEC ↗ ×7 |
| 4 | State Street Global Advisors ✦ (passive) | 67.99M | +3.2% | $4.27B | 0.1% | ▲ Add | 6 | SEC ↗ |
| 5 | JPMorgan Chase ✦ | 33.35M | +31.4% | $2.10B | 0.1% | ▲ Add | 3 | SEC ↗ ×21 |
| 6 | Geode Capital Management ✦ (passive) | 33.29M | +2.8% | $2.08B | 0.1% | ▲ Add | 8 | SEC ↗ ×2 |
| 7 | PRIMECAP Management ✦ | 32.53M | +4.6% | $2.04B | 1.6% | ▲ Add | 8 | SEC ↗ |
| 8 | D. E. Shaw & Co. ✦ | 24.31M | +116.1% | $1.53B | 1.3% | ▲ Add | 8 | SEC ↗ ×2 |
| 9 | Bank Of America Corp /De/ | 22.76M | -9.4% | $1.43B | 0.1% | ▼ Trim | 2 | SEC ↗ ×8 |
| 10 | Morgan Stanley ✦ | 22.27M | -3.0% | $1.40B | 0.1% | ▼ Trim | 3 | SEC ↗ ×23 |
| 11 | Goldman Sachs Group ✦ | 18.89M | +13.9% | $1.19B | 0.2% | ▲ Add | 3 | SEC ↗ ×8 |
| 12 | Wellington Management ✦ | 18.83M | +94.0% | $1.18B | 0.2% | ▲ Add | 8 | SEC ↗ ×8 |
| 13 | Janus Henderson Group Plc | 16.50M | +31.0% | $1.04B | 0.5% | ▲ Add | 2 | SEC ↗ ×6 |
| 14 | Capital World Investors ✦ | 15.31M | -43.6% | $960.70M | 0.1% | ▼ Trim | 8 | SEC ↗ |
| 15 | UBS Group AG | 14.82M | -0.3% | $930.25M | 0.2% | ▼ Trim | 2 | SEC ↗ ×9 |
| 16 | Franklin Resources Inc | 14.50M | +155.4% | $909.80M | 0.2% | ▲ Add | 2 | SEC ↗ ×11 |
| 17 | Amundi | 14.12M | +13.8% | $886.21M | 0.2% | ▲ Add | 2 | SEC ↗ ×8 |
| 18 | Arrowstreet Capital ✦ | 13.89M | +25.9% | $871.70M | 0.5% | ▲ Add | 8 | SEC ↗ |
| 19 | UBS AM, a distinct business unit of… | 13.51M | +23.6% | $847.99M | 0.2% | ▲ Add | 2 | SEC ↗ ×12 |
| 20 | Northern Trust Corp | 13.37M | -4.0% | $839.21M | 0.1% | ▼ Trim | 2 | SEC ↗ ×9 |
| 21 | DZ BANK AG Deutsche Zentral… | 13.23M | -28.6% | $830.16M | 0.8% | ▼ Trim | 2 | SEC ↗ ×6 |
| 22 | Nuveen, LLC | 11.73M | +25.2% | $736.33M | 0.2% | ▲ Add | 2 | SEC ↗ ×3 |
| 23 | Massachusetts Financial Services Co… | 11.00M | +21.0% | $716.92M | 0.2% | ▲ Add | 2 | SEC ↗ ×8 |
| 24 | Legal & General Group Plc | 10.60M | -2.5% | $665.20M | 0.2% | ▼ Trim | 2 | SEC ↗ ×3 |
| 25 | Assenagon Asset Management S.A. | 10.06M | +133.6% | $631.14M | 1.0% | ▲ Add | 2 | SEC ↗ |
| 26 | Bank of New York Mellon Corp | 9.54M | -15.0% | $598.88M | 0.1% | ▼ Trim | 2 | SEC ↗ ×26 |
| 27 | Two Sigma Investments ✦ | 9.41M | +280.8% | $590.55M | 0.5% | ▲ Add | 8 | SEC ↗ |
| 28 | Charles Schwab Investment… | 9.17M | +2.5% | $575.43M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 29 | Invesco Ltd. | 9.05M | -32.0% | $568.01M | 0.1% | ▼ Trim | 2 | SEC ↗ ×19 |
| 30 | Canada Pension Plan Investment Board | 8.04M | +17.1% | $504.26M | 0.3% | ▲ Add | 2 | SEC ↗ |
| 31 | Parnassus Investments, Llc | 8.00M | +1.3% | $502.24M | 1.5% | ▲ Add | 2 | SEC ↗ |
| 32 | T. Rowe Price ✦ | 7.87M | +5.6% | $494.05M | 0.1% | ▲ Add | 8 | SEC ↗ ×2 |
| 33 | Ninety One UK Ltd | 7.31M | +34.2% | $458.61M | 1.1% | ▲ Add | 2 | SEC ↗ |
| 34 | 1832 Asset Management L.P. | 7.25M | +229.4% | $455.11M | 0.6% | ▲ Add | 2 | SEC ↗ |
| 35 | Schroder Investment Management Group | 7.25M | — | $455.06M | 0.4% | n/c | 1 | SEC ↗ ×9 |
| 36 | Capital Research Global Investors | 7.08M | 0.0% | $444.33M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 37 | Neuberger Berman Group LLC | 7.07M | +76.4% | $443.82M | 0.3% | ▲ Add | 2 | SEC ↗ ×2 |
| 38 | BNP Paribas Asset Management… | 6.97M | -9.8% | $437.31M | 0.5% | ▼ Trim | 2 | SEC ↗ ×6 |
| 39 | Deutsche Bank Ag\ | 6.65M | -1.4% | $417.49M | 0.1% | ▼ Trim | 2 | SEC ↗ ×18 |
| 40 | Royal Bank Of Canada | 6.27M | +13.0% | $393.65M | 0.1% | ▲ Add | 2 | SEC ↗ ×14 |
| 41 | Dimensional Fund Advisors Lp | 6.10M | +6.3% | $382.67M | 0.1% | ▲ Add | 2 | SEC ↗ ×5 |
| 42 | Qube Research & Technologies Ltd | 5.57M | +1.2% | $349.51M | 0.5% | ▲ Add | 2 | SEC ↗ |
| 43 | Ameriprise Financial Inc | 5.57M | -13.3% | $349.45M | 0.1% | ▼ Trim | 2 | SEC ↗ ×8 |
| 44 | AQR Capital Management ✦ | 5.24M | +377.3% | $327.28M | 0.1% | ▲ Add | 8 | SEC ↗ ×10 |
| 45 | Pictet Asset Management Holding SA | 5.12M | +19.1% | $321.30M | 0.3% | ▲ Add | 2 | SEC ↗ |
| 46 | Bnp Paribas Financial Markets | 5.10M | +54.9% | $320.14M | 0.2% | ▲ Add | 2 | SEC ↗ ×2 |
| 47 | Barclays Plc | 5.02M | +15.2% | $315.27M | 0.1% | ▲ Add | 2 | SEC ↗ ×6 |
| 48 | First Manhattan Co. Llc. | 4.91M | +161.0% | $308.18M | 0.9% | ▲ Add | 2 | SEC ↗ |
| 49 | Lazard Asset Management Llc | 4.88M | +24.8% | $306.25M | 0.5% | ▲ Add | 2 | SEC ↗ ×3 |
| 50 | Adage Capital Partners ✦ | 4.63M | +122.5% | $290.74M | 0.4% | ▲ Add | 8 | SEC ↗ |
| 51 | Ensign Peak Advisors, Inc | 4.51M | +185.7% | $282.83M | 0.5% | ▲ Add | 2 | SEC ↗ |
| 52 | Swiss National Bank | 4.35M | +7.1% | $273.00M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 53 | Citadel Advisors ✦ | 4.22M | -11.7% | $264.64M | 0.2% | ▼ Trim | 8 | SEC ↗ ×2 |
| 54 | Jane Street Group, Llc | 4.03M | +6.3% | $253.02M | 0.3% | ▲ Add | 2 | SEC ↗ ×4 |
| 55 | Millennium Management ✦ | 4.34M | -61.5% | $240.82M | 0.2% | ▼ Trim | 8 | SEC ↗ |
| 56 | Man Group plc | 3.72M | -15.3% | $233.35M | 0.5% | ▼ Trim | 2 | SEC ↗ ×2 |
| 57 | National Pension Service | 3.70M | -1.7% | $232.10M | 0.2% | ▼ Trim | 2 | SEC ↗ |
| 58 | Point72 Asset Management ✦ | 3.69M | +51.5% | $231.38M | 0.4% | ▲ Add | 8 | SEC ↗ |
| 59 | Marshall Wace ✦ | 3.61M | +22.1% | $226.59M | 0.2% | ▲ Add | 8 | SEC ↗ ×3 |
| 60 | Holocene Advisors, LP | 3.43M | -23.3% | $215.15M | 0.5% | ▼ Trim | 2 | SEC ↗ |
| 61 | Sumitomo Mitsui Trust Group, Inc. | 3.42M | -1.0% | $214.78M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 62 | Hsbc Holdings Plc | 3.40M | -52.9% | $212.74M | 0.1% | ▼ Trim | 2 | SEC ↗ ×10 |
| 63 | Mitsubishi UFJ Asset Management… | 3.36M | +8.1% | $211.10M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 64 | FIL Ltd | 3.21M | -32.5% | $201.69M | 0.2% | ▼ Trim | 2 | SEC ↗ ×4 |
| 65 | Renaissance Technologies ✦ | 3.15M | +32.3% | $197.79M | 0.3% | ▲ Add | 5 | SEC ↗ |
| 66 | Raymond James Financial Inc | 3.03M | -14.3% | $190.08M | 0.1% | ▼ Trim | 2 | SEC ↗ ×4 |
| 67 | Wells Fargo & Company/Mn | 2.97M | -28.2% | $186.45M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 68 | Aberdeen Group plc | 2.77M | +4.6% | $173.58M | 0.3% | ▲ Add | 2 | SEC ↗ ×3 |
| 69 | Rhumbline Advisers | 2.67M | -0.8% | $167.83M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 70 | Manufacturers Life Insurance… | 2.63M | +155.7% | $165.01M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 71 | American Century Companies Inc | 2.62M | -43.1% | $164.27M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 72 | Mariner, LLC | 2.48M | +476.3% | $155.94M | 0.2% | ▲ Add | 2 | SEC ↗ ×2 |
| 73 | Alliancebernstein L.P. | 1.63M | -42.0% | $155.02M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 74 | Allianz Asset Management GmbH | 2.39M | +19.7% | $150.21M | 0.2% | ▲ Add | 2 | SEC ↗ ×5 |
| 75 | Russell Investments Group, Ltd. | 2.32M | +19.2% | $145.54M | 0.2% | ▲ Add | 2 | SEC ↗ ×20 |
| 76 | Bank Of Nova Scotia | 2.30M | +15.5% | $144.51M | 0.3% | ▲ Add | 2 | SEC ↗ ×2 |
| 77 | California State Teachers… | 2.30M | -2.5% | $144.32M | 0.2% | ▼ Trim | 2 | SEC ↗ |
| 78 | Clearbridge Investments, LLC | 2.28M | +210.9% | $143.03M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 79 | California Public Employees… | 2.26M | -24.9% | $141.89M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 80 | Credit Agricole S A | 2.02M | -7.0% | $126.85M | 0.4% | ▼ Trim | 2 | SEC ↗ ×7 |
| 81 | Stifel Financial Corp | 1.98M | -6.5% | $124.12M | 0.1% | ▼ Trim | 2 | SEC ↗ ×5 |
| 82 | CIBC Bancorp USA Inc. | 1.94M | — | $121.90M | 0.2% | n/c | 1 | SEC ↗ ×3 |
| 83 | New York State Common Retirement… | 1.81M | +0.2% | $113.76M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 84 | Td Asset Management Inc | 1.80M | -3.5% | $112.89M | 0.1% | ▼ Trim | 2 | SEC ↗ ×2 |
| 85 | Zurcher Kantonalbank (Zurich… | 1.79M | +3.5% | $112.39M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 86 | Jones Financial Companies Lllp | 1.53M | +3339.1% | $105.95M | 0.1% | ▲ Add | 2 | SEC ↗ ×2 |
| 87 | Envestnet Asset Management Inc | 1.69M | -35.3% | $105.85M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 88 | Principal Financial Group Inc | 1.69M | +0.9% | $105.82M | 0.1% | ▲ Add | 2 | SEC ↗ ×2 |
| 89 | Squarepoint Ops LLC | 1.59M | -47.6% | $99.77M | 0.2% | ▼ Trim | 2 | SEC ↗ |
| 90 | Citigroup Inc | 1.58M | +16.2% | $98.93M | 0.1% | ▲ Add | 2 | SEC ↗ ×4 |
| 91 | Prudential Financial Inc | 1.55M | -2.3% | $97.17M | 0.1% | ▼ Trim | 2 | SEC ↗ ×2 |
| 92 | Universal- Beteiligungs- und… | 1.54M | +11.5% | $96.74M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 93 | Aviva Plc | 1.49M | +0.2% | $93.41M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 94 | Caisse De Depot Et Placement Du… | 1.49M | +2.7% | $93.21M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 95 | Hrt Financial Lp | 1.36M | +309.8% | $85.28M | 0.2% | ▲ Add | 2 | SEC ↗ ×3 |
| 96 | Balyasny Asset Management L.P. | 1.36M | -45.4% | $85.10M | 0.2% | ▼ Trim | 2 | SEC ↗ |
| 97 | Bank Of Montreal /Can/ | 1.32M | -35.1% | $83.11M | 0.0% | ▼ Trim | 2 | SEC ↗ ×9 |
| 98 | Nordea Investment Management Ab | 1.33M | +803.0% | $82.12M | 0.1% | ▲ Add | 2 | SEC ↗ ×4 |
| 99 | State Board Of Administration Of… | 1.29M | 0.0% | $80.87M | 0.2% | Held | 2 | SEC ↗ |
| 100 | Cerity Partners LLC | 1.26M | -0.1% | $79.30M | 0.1% | ▼ Trim | 2 | SEC ↗ ×3 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Norges Bank | $2.20B | was 0.2% |
| Viking Global Investors | $239.31M | was 0.6% |
| Alyeska Investment Group, L.P. | $22.68M | was 0.1% |
| Simplex Trading, Llc | $13.53M | was 0.4% |
| Bamco Inc /Ny/ | $4.48M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1,653 holders, 1.31B shares, $78.98B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
Aug 25
Morano Susan E
Director · 2.04K sh @ 49.22 · $100,408
Open-market sales (S)
No open-market insider sales in our coverage window.
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Aug 06
SC 13G/A — FMR LLC
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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