417 tracked 13F filers disclose a position in CYTK as of the latest SEC 13F filings, a combined $8.8B 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 | 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 | STATE STREET CORP | $553.2M | 6.5M | ▲+13% Added · +749K sh | Q2 2026 | |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | $385.2M | 5.8M | →First observed position No prior filed position | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $361.8M | 5.5M | →First observed position No prior filed position | Q1 2026 | |
| 7 | Avoro Capital Advisors LLC | $425.9M | 5.0M | ▲+50% Added · +1.7M sh | Q2 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $316.3M | 3.7M | ▲+15% Added · +497K sh | Q2 2026 | |
| 9 | BANK OF AMERICA CORP /DE/ | $206.0M | 3.1M | ▲+6.3% Added · +184K sh | Q1 2026 | |
| 10 | RTW INVESTMENTS, LP | $243.8M | 2.9M | ▲+5.2% Added · +141K sh | Q2 2026 | |
| 11 | Polar Capital Holdings Plc | $192.0M | 2.3M | ▲+36% Added · +592K sh | Q2 2026 | |
| 12 | GOLDMAN SACHS GROUP INC | $145.4M | 2.2M | ▼−7.0% Reduced · −166K sh | Q1 2026 | |
| 13 | UBS Group AG | $136.9M | 2.1M | ▲+84% Added · +946K sh | Q1 2026 | |
| 14 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | $136.6M | 1.6M | ▲+47% Added · +516K sh | Q2 2026 | |
| 15 | Integral Health Asset Management, LLC | $136.3M | 1.6M | —Held | Q2 2026 | |
| 16 | PRICE T ROWE ASSOCIATES INC /MD/ | $104.4M | 1.6M | ▼−18% Reduced · −346K sh | Q1 2026 | |
| 17 | MORGAN STANLEY | $99.2M | 1.5M | ▲+19% Added · +240K sh | Q1 2026 | |
| 18 | Paradigm Biocapital Advisors LP | $97.6M | 1.5M | ▲New +1.5M sh | Q1 2026 | |
| 19 | NORTHERN TRUST CORP | $95.0M | 1.4M | ▲+4.4% Added · +61K sh | Q1 2026 | |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $92.1M | 1.4M | ▲+1.0% Added · +14K sh | Q1 2026 | |
| 21 | Deep Track Capital, LP | $90.6M | 1.4M | ▼−59% Reduced · −2.0M sh | Q1 2026 | |
| 22 | Frazier Life Sciences Management, L.P. | $98.8M | 1.2M | —Held | Q2 2026 | |
| 23 | CITADEL ADVISORS LLC | $72.5M | 1.1M | ▼−5.4% Reduced · −63K sh | Q1 2026 | |
| 24 | PRINCIPAL FINANCIAL GROUP INC | $72.1M | 1.1M | ▲+12% Added · +117K 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.
Last quarter, 8 funds opened a new position in CYTK and 38 added to an existing one, while 21 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 |
|---|---|---|
| AMAZON.COM INCAMZN | 224 funds | $194.5B |
| MICROSOFT CORPMSFT | 220 funds | $264.1B |
| NVIDIA CORPNVDA | 219 funds | $390.4B |
| META PLATFORMS INC-CLASS AMETA | 216 funds | $110.1B |
| ELI LILLY & COLLY | 216 funds | $77.3B |
| ALPHABET INC-CL AGOOGL | 215 funds | $167.6B |
| BROADCOM INCAVGO | 214 funds | $151.8B |
| MICRON TECHNOLOGY INCMU | 209 funds | $41.6B |
| APPLE INCAAPL | 207 funds | $294.7B |
| ADVANCED MICRO DEVICESAMD | 202 funds | $38.3B |
| VISA INC-CLASS A SHARESV | 200 funds | $61.2B |
| JPMORGAN CHASE & COJPM | 198 funds | $65.8B |
Ranked by how many of CYTK's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Sep 1, 2026 | PARSHALL B LYNNE | Director | Sell (S) | 5K | $357K |
| Aug 31, 2026 | Blum Robert I | President & CEO, Director | Sell (S) | 8K | $527K |
| Aug 31, 2026 | Callos Andrew | EVP, Chief Commercial Officer | Sell (S) | 10K | $702K |
| Aug 18, 2026 | Malik Fady Ibraham | EVP Research & Development | Sell (S) | 4K | $265K |
| Aug 10, 2026 | Blum Robert I | President & CEO, Director | Sell (S) | 8K | $576K |
| Jul 30, 2026 | Callos Andrew | EVP, Chief Commercial Officer | Sell (S) | 14K | $1.1M |
| Jul 27, 2026 | Blum Robert I | President & CEO, Director | Sell (S) | 8K | $607K |
| Jul 21, 2026 | Malik Fady Ibraham | EVP Research & Development | Sell (S) | 4K | $282K |
| Jul 13, 2026 | Blum Robert I | President & CEO, Director | Sell (S) | 10 | $820 |
| Jul 13, 2026 | Blum Robert I | President & CEO, Director | Sell (S) | 7K | $614K |
| Jul 7, 2026 | Malik Fady Ibraham | EVP Research & Development | Sell (S) | 4K | $303K |
| Jul 1, 2026 | Callos Andrew | EVP, Chief Commercial Officer | Sell (S) | 15K | $1.3M |
| Class | 13F holders | Value held |
|---|---|---|
| CYTKthis pagecs | 417 funds | $8.8B |
| CYTK 3.5 07/01/27Sovereign/Corporate | 22 funds | $161.2M |
| CYTK 4 11/15/26NOTE 4.000%11/1 | 1 funds | $78.2M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for CYTK
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.
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.