64 tracked 13F filers disclose a position in SI as of the latest SEC 13F filings, a combined $119.6M in reported value. 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.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | $55.0M | 3.8M | ▼−1.7% Reduced · −64K sh | Q1 2026 | |
| 2 | BlackRock, Inc. | $8.1M | 556K | ▲+79% Added · +245K sh | Q1 2026 | |
| 3 | SECTORAL ASSET MANAGEMENT INC | $8.7M | 430K | —Held | Q2 2026 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $6.0M | 413K | →First observed position No prior filed position | Q1 2026 | |
| 5 | KCM Capital Inc | $6.1M | 300K | ▲+757% Added · +265K sh | Q2 2026 | |
| 6 | Roubaix Capital, LLC | $5.2M | 255K | ▼−0.7% Reduced · −2K sh | Q2 2026 | |
| 7 | Alyeska Investment Group, L.P. | $3.4M | 233K | —Held | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $4.0M | 200K | ▲+8.6% Added · +16K sh | Q2 2026 | |
| 9 | MILLENNIUM MANAGEMENT LLC | $2.8M | 194K | ▲+111% Added · +102K sh | Q1 2026 | |
| 10 | MORGAN STANLEY | $2.3M | 158K | ▲+4.5% Added · +7K sh | Q1 2026 | |
| 11 | CM Management, LLC | $2.9M | 145K | ▲+45% Added · +45K sh | Q2 2026 | |
| 12 | JPMORGAN CHASE & CO | $1.9M | 131K | ▲68× Added · +129K sh | Q1 2026 | |
| 13 | STATE STREET CORP | $2.3M | 115K | ▲+23% Added · +22K sh | Q2 2026 | |
| 14 | Walleye Capital LLC | $1.7M | 86K | ▲+1.1% Added · +972 sh | Q2 2026 | |
| 15 | Schonfeld Strategic Advisors LLC | $1.6M | 78K | ▲New +78K sh | Q2 2026 | |
| 16 | NORTHERN TRUST CORP | $931K | 64K | ▲+79% Added · +28K sh | Q1 2026 | |
| 17 | VANGUARD PORTFOLIO MANAGEMENT LLC | $886K | 61K | →First observed position No prior filed position | Q1 2026 | |
| 18 | ROYAL BANK OF CANADA | $783K | 54K | ▲71× Added · +53K sh | Q1 2026 | |
| 19 | READYSTATE ASSET MANAGEMENT LP | $573K | 39K | —Held | Q1 2026 | |
| 20 | VANGUARD FIDUCIARY TRUST CO | $547K | 38K | →First observed position No prior filed position | Q1 2026 | |
| 21 | BANK OF AMERICA CORP /DE/ | $392K | 27K | ▲+44% Added · +8K sh | Q1 2026 | |
| 22 | Sixth Street Partners Management Company, L.P. | $519K | 26K | ▲New +26K sh | Q2 2026 | |
| 23 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $333K | 23K | ▲+95% Added · +11K sh | Q1 2026 | |
| 24 | Bank of New York Mellon Corp | $252K | 17K | ▲New +17K sh | Q1 2026 | |
| 25 | ARMSTRONG ADVISORY GROUP, INC | $351K | 17K | ▲New +17K sh | Q2 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.
Last quarter, 9 funds opened a new position in SI and 11 added to an existing one, while 2 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 21 funds | $37.0B |
| AMAZON.COM INCAMZN | 21 funds | $18.5B |
| MICRON TECHNOLOGY INCMU | 21 funds | $4.8B |
| JOHNSON & JOHNSONJNJ | 21 funds | $4.8B |
| MERCK & CO. INC.MRK | 21 funds | $2.6B |
| MICROSOFT CORPMSFT | 20 funds | $23.1B |
| ALPHABET INC-CL AGOOGL | 20 funds | $13.0B |
| META PLATFORMS INC-CLASS AMETA | 20 funds | $10.6B |
| ELI LILLY & COLLY | 20 funds | $6.6B |
| CHEVRON CORPCVX | 20 funds | $3.2B |
| NETFLIX INCNFLX | 20 funds | $3.2B |
| GENERAL ELECTRICGE | 20 funds | $2.9B |
Ranked by how many of SI's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 6, 2026 | Gilde Healthcare Holding B.V. | 10% Owner | Sell (S) | 2K | $47K |
| Aug 5, 2026 | Gilde Healthcare Holding B.V. | 10% Owner | Sell (S) | 7K | $166K |
| Aug 4, 2026 | Gilde Healthcare Holding B.V. | 10% Owner | Sell (S) | 100K | $2.3M |
| Aug 3, 2026 | Gilde Healthcare Holding B.V. | 10% Owner | Sell (S) | 11K | $244K |
| Jul 31, 2026 | Gilde Healthcare Holding B.V. | 10% Owner | Sell (S) | 20K | $455K |
| Jul 30, 2026 | Gilde Healthcare Holding B.V. | 10% Owner | Sell (S) | 28K | $660K |
| Jun 15, 2026 | Ahearn Matthew Fraser | Chief Operating Officer, Director | Sell (S) | 2K | $30K |
| Jun 15, 2026 | Ahearn Matthew Fraser | Chief Operating Officer, Director | Sell (S) | 3K | $48K |
| Jun 12, 2026 | Ahearn Matthew Fraser | Chief Operating Officer, Director | Sell (S) | 16K | $296K |
| Mar 13, 2026 | Points Jeffrey S. | Chief Financial Officer | Buy (P) | 2K | $30K |
| Mar 13, 2026 | Buchholz Richard | Director | Buy (P) | 1K | $15K |
| Mar 13, 2026 | Ball Robert Joseph | CEO & Executive Chairman, Director | Buy (P) | 2K | $33K |
Connected entities for SI
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/SI/capital-change-brief"
Use Arkolith's capital_change_brief for SI. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for SI. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.