This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/BSX/capital-change-brief"
Use Arkolith's capital_change_brief for BSX. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $8.3B | 131.8M | ▼−3.1% Reduced · −4.2M sh | Q1 2026 | |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | $6.0B | 96.4M | ▲New +96.4M sh | Q1 2026 | |
| 3 | FMR LLC | $4.7B | 74.2M | ▼−24% Reduced · −23.2M sh | Q1 2026 | |
| 4 | STATE STREET CORP | $4.3B | 68.0M | ▲+3.3% Added · +2.1M sh | Q1 2026 | |
| 5 | JPMORGAN CHASE & CO | $2.1B | 33.4M | ▲+31% Added · +8.0M sh | Q1 2026 | |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | $2.1B | 33.3M | ▲+2.8% Added · +902K sh | Q1 2026 | |
| 7 | PRIMECAP MANAGEMENT CO/CA/ | $2.0B | 32.5M | ▲+4.6% Added · +1.4M sh | Q1 2026 | |
| 8 | VANGUARD PORTFOLIO MANAGEMENT LLC | $1.9B | 29.8M | ▲New +29.8M sh | Q1 2026 | |
| 9 | D. E. Shaw & Co., Inc. | $1.5B | 24.3M | ▲+116% Added · +13.1M sh | Q1 2026 | |
| 10 | NORGES BANK | $2.2B | 23.1M | ▲+19% Added · +3.6M sh | Q4 2025 | |
| 11 | BANK OF AMERICA CORP /DE/ | $1.4B | 22.8M | ▼−9.4% Reduced · −2.4M sh | Q1 2026 | |
| 12 | MORGAN STANLEY | $1.4B | 22.3M | ▼−3.0% Reduced · −694K sh | Q1 2026 | |
| 13 | GOLDMAN SACHS GROUP INC | $1.2B | 18.9M | ▲+14% Added · +2.3M sh | Q1 2026 | |
| 14 | JANUS HENDERSON GROUP PLC | $1.0B | 16.5M | ▲+31% Added · +3.9M sh | Q1 2026 | |
| 15 | UBS Group AG | $930.2M | 14.8M | ▼−0.3% Reduced · −47K sh | Q1 2026 | |
| 16 | FRANKLIN RESOURCES INC | $909.8M | 14.5M | ▲+155% Added · +8.8M sh | Q1 2026 | |
| 17 | Amundi | $886.2M | 14.1M | ▲+14% Added · +1.7M sh | Q1 2026 | |
| 18 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $871.7M | 13.9M | ▲+26% Added · +2.9M sh | Q1 2026 | |
| 19 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME | $848.0M | 13.5M | ▲+24% Added · +2.6M sh | Q1 2026 | |
| 20 | NORTHERN TRUST CORP | $839.2M | 13.4M | ▼−4.0% Reduced · −562K sh | Q1 2026 | |
| 21 | DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt | $830.2M | 13.2M | ▼−29% Reduced · −5.3M sh | Q1 2026 | |
| 22 | Nuveen, LLC | $736.3M | 11.7M | ▲+25% Added · +2.4M sh | Q1 2026 | |
| 23 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $716.9M | 11.0M | ▲+21% Added · +1.9M sh | Q1 2026 | |
| 24 | Legal & General Group Plc | $665.2M | 10.6M | ▼−2.5% Reduced · −276K sh | Q1 2026 | |
| 25 | Bank of New York Mellon Corp | $598.9M | 9.5M | ▼−15% Reduced · −1.7M sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 1, 2026 | Monson Jonathan | EVP and CFO | Option exercise (M) | 2K | $0 |
| Jul 1, 2026 | Monson Jonathan | EVP and CFO | Tax withholding (F) | 1K | $43K |
| Jul 1, 2026 | Monson Jonathan | EVP and CFO | Option exercise (M) | 2K | $0 |
| May 28, 2026 | Mahoney Michael F | Chairman, President & CEO, Director | Gift (G) | 387K | $0 |
| May 20, 2026 | Habiger David C | Director | Buy (P) | 2K | $126K |
| May 20, 2026 | LUDWIG EDWARD J | Director | Buy (P) | 4K | $203K |
| May 20, 2026 | Pegus Cheryl | Director | Buy (P) | 2K | $100K |
| May 19, 2026 | Habiger David C | Director | Buy (P) | 2K | $125K |
| May 7, 2026 | Habiger David C | Director | Grant (A) | 4K | $0 |
| May 7, 2026 | LUDWIG EDWARD J | Director | Grant (A) | 4K | $0 |
| May 7, 2026 | Smith Cathy R | Director | Grant (A) | 4K | $0 |
| May 7, 2026 | Smith Cathy R | Director | Grant (A) | 2K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 518 funds | $349.8B |
| AMAZON.COM INCAMZN | 513 funds | $265.3B |
| NVIDIA CORPNVDA | 510 funds | $474.8B |
| META PLATFORMS INC-CLASS AMETA | 507 funds | $146.4B |
| APPLE INCAAPL | 504 funds | $355.6B |
| ALPHABET INC-CL AGOOGL | 501 funds | $232.8B |
| ELI LILLY & COLLY | 500 funds | $104.0B |
| BROADCOM INCAVGO | 499 funds | $186.3B |
| VISA INC-CLASS A SHARESV | 496 funds | $81.2B |
| JPMORGAN CHASE & COJPM | 487 funds | $89.7B |
| ALPHABET INC-CL CGOOG | 485 funds | $148.2B |
| MASTERCARD INC - AMA | 485 funds | $70.8B |
Ranked by how many of BSX's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for BSX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.