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/CYTK/capital-change-brief"
Use Arkolith's capital_change_brief for CYTK. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | T. Rowe Price Investment Management, Inc. | Withheld | 17.5M | ▼−1.1% Reduced · −193K sh | Q1 2026 | |
| 2 | BlackRock, Inc. | $1.1B | 16.5M | ▲+0.9% Added · +153K sh | Q1 2026 | |
| 3 | FMR LLC | $706.8M | 10.7M | ▼−16% Reduced · −2.1M sh | Q1 2026 | |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | $385.2M | 5.8M | ▲New +5.8M sh | Q1 2026 | |
| 5 | STATE STREET CORP | $378.7M | 5.7M | ▼−1.4% Reduced · −80K sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $361.8M | 5.5M | ▲New +5.5M sh | Q1 2026 | |
| 7 | Avoro Capital Advisors LLC | $219.7M | 3.3M | ▲New +3.3M sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $212.0M | 3.2M | ▲+5.2% Added · +159K sh | Q1 2026 | |
| 9 | BANK OF AMERICA CORP /DE/ | $206.0M | 3.1M | ▲+6.3% Added · +184K sh | Q1 2026 | |
| 10 | RTW INVESTMENTS, LP | $179.4M | 2.7M | —Held | Q1 2026 | |
| 11 | GOLDMAN SACHS GROUP INC | $145.4M | 2.2M | ▼−7.0% Reduced · −166K sh | Q1 2026 | |
| 12 | UBS Group AG | $136.9M | 2.1M | ▲+84% Added · +946K sh | Q1 2026 | |
| 13 | Polar Capital Holdings Plc | $109.5M | 1.7M | ▼−31% Reduced · −761K sh | Q1 2026 | |
| 14 | Integral Health Asset Management, LLC | $105.5M | 1.6M | ▲+14% Added · +200K sh | Q1 2026 | |
| 15 | PRICE T ROWE ASSOCIATES INC /MD/ | $104.4M | 1.6M | ▼−18% Reduced · −346K sh | Q1 2026 | |
| 16 | MORGAN STANLEY | $99.2M | 1.5M | ▲+19% Added · +240K sh | Q1 2026 | |
| 17 | Paradigm Biocapital Advisors LP | $97.6M | 1.5M | ▲New +1.5M sh | Q1 2026 | |
| 18 | NORTHERN TRUST CORP | $95.0M | 1.4M | ▲+4.4% Added · +61K sh | Q1 2026 | |
| 19 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $92.1M | 1.4M | ▲+1.0% Added · +14K sh | Q1 2026 | |
| 20 | Deep Track Capital, LP | $90.6M | 1.4M | ▼−59% Reduced · −2.0M sh | Q1 2026 | |
| 21 | Frazier Life Sciences Management, L.P. | $76.4M | 1.2M | ▲+24% Added · +225K sh | Q1 2026 | |
| 22 | CITADEL ADVISORS LLC | $72.5M | 1.1M | ▼−5.4% Reduced · −63K sh | Q1 2026 | |
| 23 | PRINCIPAL FINANCIAL GROUP INC | $72.1M | 1.1M | ▲+12% Added · +117K sh | Q1 2026 | |
| 24 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | $71.7M | 1.1M | ▲New +1.1M sh | Q1 2026 | |
| 25 | Bank of New York Mellon Corp | $66.3M | 1.0M | ▲+18% Added · +152K 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 15, 2026 | HENDERSON JOHN T | Director | Grant (A) | 272 | $22K |
| Jul 15, 2026 | Kaye Edward M. MD | Director | Grant (A) | 151 | $12K |
| Jul 15, 2026 | Wysenski Nancy | Director | Grant (A) | 75 | $6K |
| Jul 15, 2026 | Daly James M | Director | Grant (A) | 151 | $12K |
| Jul 15, 2026 | Harrington Robert Arthur | Director | Grant (A) | 151 | $12K |
| Jul 15, 2026 | WIERENGA WENDELL | Director | Grant (A) | 75 | $6K |
| Jul 13, 2026 | Blum Robert I | President & CEO, Director | Option exercise (M) | 7K | $0 |
| Jul 13, 2026 | Blum Robert I | President & CEO, Director | Sell (S) | 7K | $614K |
| Jul 13, 2026 | Blum Robert I | President & CEO, Director | Option exercise (M) | 7K | $79K |
| Jul 13, 2026 | Blum Robert I | President & CEO, Director | Sell (S) | 10 | $820 |
| Jul 7, 2026 | Malik Fady Ibraham | EVP Research & Development | Option exercise (M) | 4K | $27K |
| Jul 7, 2026 | Malik Fady Ibraham | EVP Research & Development | Sell (S) | 4K | $303K |
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 139 funds | $85.0B |
| MICROSOFT CORPMSFT | 139 funds | $58.9B |
| ALPHABET INC-CL AGOOGL | 139 funds | $37.9B |
| AMAZON.COM INCAMZN | 138 funds | $44.3B |
| ELI LILLY & COLLY | 138 funds | $16.1B |
| BOSTON SCIENTIFIC CORPBSX | 138 funds | $3.4B |
| BROADCOM INCAVGO | 137 funds | $33.0B |
| META PLATFORMS INC-CLASS AMETA | 137 funds | $26.6B |
| UNITEDHEALTH GROUP INCUNH | 134 funds | $5.4B |
| APPLE INCAAPL | 133 funds | $66.2B |
| MICRON TECHNOLOGY INCMU | 133 funds | $11.8B |
| VISA INC-CLASS A SHARESV | 133 funds | $11.7B |
Ranked by how many of CYTK'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 CYTK. 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.