| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $978.6M | 9.1M | ▼−0.8% Reduced · −75K sh | Q1 2026 | |
| 2 | JANUS HENDERSON GROUP PLC | $575.8M | 5.3M | ▲+77% Added · +2.3M sh | Q1 2026 | |
| 3 | PRIMECAP MANAGEMENT CO/CA/ | $362.9M | 3.4M | ▼−0.2% Reduced · −6K sh | Q1 2026 | |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | $345.4M | 3.2M | ▲New +3.2M sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $270.1M | 2.5M | ▲New +2.5M sh | Q1 2026 | |
| 6 | STATE STREET CORP | $235.0M | 2.2M | ▲+2.8% Added · +60K sh | Q1 2026 | |
| 7 | AMERIPRISE FINANCIAL INC | $173.4M | 1.6M | ▼−23% Reduced · −494K sh | Q1 2026 | |
| 8 | CITADEL ADVISORS LLC | $155.8M | 1.4M | ▲54× Added · +1.4M sh | Q1 2026 | |
| 9 | ALLIANCEBERNSTEIN L.P. | $157.8M | 1.4M | ▼−15% Reduced · −246K sh | Q1 2026 | |
| 10 | Holocene Advisors, LP | $149.0M | 1.4M | ▲+6.5% Added · +84K sh | Q1 2026 | |
| 11 | GOLDMAN SACHS GROUP INC | $148.0M | 1.4M | ▲+1.8% Added · +25K sh | Q1 2026 | |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | $146.1M | 1.4M | ▲+2.9% Added · +39K sh | Q1 2026 | |
| 13 | MILLENNIUM MANAGEMENT LLC | $126.4M | 1.2M | ▼−27% Reduced · −436K sh | Q1 2026 | |
| 14 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | $115.6M | 1.1M | ▼−3.0% Reduced · −33K sh | Q1 2026 | |
| 15 | BRAIDWELL LP | $82.2M | 764K | ▼−17% Reduced · −158K sh | Q1 2026 | |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $76.9M | 714K | ▲+0.1% Added · +363 sh | Q1 2026 | |
| 17 | MORGAN STANLEY | $73.1M | 679K | ▲+1.2% Added · +8K sh | Q1 2026 | |
| 18 | BANK OF AMERICA CORP /DE/ | $70.8M | 657K | ▲+22% Added · +119K sh | Q1 2026 | |
| 19 | Artisan Partners Limited Partnership | $65.4M | 607K | ▼−14% Reduced · −95K sh | Q1 2026 | |
| 20 | NORTHERN TRUST CORP | $62.0M | 576K | ▼−1.9% Reduced · −11K sh | Q1 2026 | |
| 21 | NORGES BANK | $60.5M | 536K | ▼−27% Reduced · −203K sh | Q4 2025 | |
| 22 | JENNISON ASSOCIATES LLC | $52.4M | 487K | ▲New +487K sh | Q1 2026 | |
| 23 | WESTFIELD CAPITAL MANAGEMENT CO LP | $51.9M | 482K | ▲New +482K sh | Q1 2026 | |
| 24 | LOOMIS SAYLES & CO L P | $45.4M | 421K | ▼−5.9% Reduced · −27K sh | Q1 2026 | |
| 25 | VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. | $58.2M | 416K | ▲New +416K 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.
| Company | Co-held by | Combined value |
|---|---|---|
| ELI LILLY & COLLY | 104 funds | $13.1B |
| BOSTON SCIENTIFIC CORPBSX | 103 funds | $2.8B |
| NVIDIA CORPNVDA | 102 funds | $73.0B |
| MICROSOFT CORPMSFT | 102 funds | $49.6B |
| INTUITIVE SURGICAL INCISRG | 101 funds | $4.6B |
| SERVICENOW INCNOW | 101 funds | $3.6B |
| AMAZON.COM INCAMZN | 100 funds | $39.1B |
| ALPHABET INC-CL AGOOGL | 100 funds | $32.0B |
| META PLATFORMS INC-CLASS AMETA | 100 funds | $22.3B |
| APPLE INCAAPL | 99 funds | $59.1B |
| DANAHER CORPDHR | 99 funds | $3.1B |
| BROADCOM INCAVGO | 98 funds | $26.0B |
Ranked by how many of GKOS's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 9, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Sell (S) | 10K | $1.6M |
| Jul 6, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Sell (S) | 10K | $1.5M |
| Jul 1, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell (S) | 716 | $100K |
| Jun 16, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell (S) | 2K | $201K |
| May 14, 2026 | Kliman Gilbert H | Director | Sell (S) | 5K | $704K |
| May 11, 2026 | Kliman Gilbert H | Director | Sell (S) | 5K | $675K |
| May 1, 2026 | WEN LEANA | Director | Sell (S) | 2K | $244K |
| May 1, 2026 | Gilliam Joseph E | PRESIDENT & COO | Sell (S) | 20K | $2.8M |
| Apr 30, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Sell (S) | 10K | $1.4M |
| Apr 10, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell (S) | 32 | $4K |
| Apr 10, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell (S) | 614 | $73K |
| Apr 10, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell (S) | 210 | $25K |
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/GKOS/capital-change-brief"
Use Arkolith's capital_change_brief for GKOS. 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 GKOS. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.