🕵️ Cytokinetics Inc ($CYTK)
SEC insider & ownership activity, last 12 months · CIK 1061983 · every row links its SEC filing
Over the last 12 months insiders sold $52.1M with no open-market buying against it. Robert I. Blum sold $17.1M through a 10b5-1 trading plan in 20 lots (Oct–Sep). 1 planned sale is pending, the largest $3.1M (Sung Lee). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 10 sellers, $52.1M (88 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Robert I. Blum | 0 | – | 20 | $17.1M | Sep 15, 2026 |
| Callos Andrew | 0 | – | 25 | $16.0M | Aug 31, 2026 |
| Lee Sung | 0 | – | 5 | $5.7M | Jul 1, 2026 |
| Malik Fady Ibraham | 0 | – | 21 | $4.5M | Sep 8, 2026 |
| Kaye Edward M. Md | 0 | – | 5 | $3.2M | Jun 1, 2026 |
| John T. Henderson | 0 | – | 2 | $2.1M | May 5, 2026 |
| Wierenga Wendell | 0 | – | 3 | $1.9M | May 5, 2026 |
| Parshall B. Lynne | 0 | – | 4 | $1.4M | Sep 1, 2026 |
| Robert E. Landry | 0 | – | 2 | $147K | Sep 15, 2026 |
| Harrington Robert Arthur | 0 | – | 1 | $144K | Dec 1, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| T. ROWE Price Investment Management, Inc. | 14.5% | 13G | Feb 17, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.2% | 13G | Apr 29, 2026 | filing ↗ | |
| Wellington Management Group LLP | 5.1% | 13G | Aug 13, 2026 | filing ↗ | |
| Wellington Group Holdings LLP | 5.1% | 13G | Aug 13, 2026 | filing ↗ | |
| Wellington Investment Advisors Holdings LLP | 5.1% | 13G | Aug 13, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Robert I. Blum | $7.1M | Sep 15, 2026 | filing ↗ |
| Robert Landry | $147K | Sep 11, 2026 | filing ↗ |
| B. Lynne Parshall | $355K | Sep 1, 2026 | filing ↗ |
| Andrew Callos | $1.9M | Jul 30, 2026 | filing ↗ |
| Fady Malik | $2.1M | Jul 7, 2026 | filing ↗ |
| Robert Blum | $4.5M | Jul 1, 2026 | filing ↗ |
| Sung Lee | $781K | Jun 29, 2026 | filing ↗ |
| Sung Lee | $541K | Jun 26, 2026 | filing ↗ |
| Sung Lee | $3.1M | Jun 24, 2026 | filing ↗ |
| Edward Kaye | $225K | Jun 1, 2026 | filing ↗ |
| Wendell Wierenga | $266K | May 5, 2026 | filing ↗ |
| John Henderson | $1.3M | May 5, 2026 | filing ↗ |
| Sung Lee | $1.6M | May 5, 2026 | filing ↗ |
| Andrew Callos | $5.3M | Apr 15, 2026 | filing ↗ |
| Fady Malik | $1.4M | Apr 7, 2026 | filing ↗ |
| Robert Blum | $3.0M | Apr 1, 2026 | filing ↗ |
| Andrew Callos | $229K | Mar 31, 2026 | filing ↗ |
| Andrew Callos | $120K | Mar 18, 2026 | filing ↗ |
| Andrew Callos | $103K | Mar 16, 2026 | filing ↗ |
| B. Lynne Parshall | $622K | Mar 2, 2026 | filing ↗ |
| Andrew Callos | $3.8M | Jan 2, 2026 | filing ↗ |
| Andrew Callos | $114K | Dec 29, 2025 | filing ↗ |
| Wendell Wierenga | $1.3M | Dec 22, 2025 | filing ↗ |
| Andrew Callos | $3.6M | Dec 5, 2025 | filing ↗ |
| John T. Henderson | $578K | Dec 2, 2025 | filing ↗ |
| Edward Kaye | $1.9M | Dec 1, 2025 | filing ↗ |
| B. Lynne Parshall | $331K | Nov 19, 2025 | filing ↗ |
| Edward Kaye | $322K | Nov 11, 2025 | filing ↗ |
| Wendell Wierenga | $253K | Oct 27, 2025 | filing ↗ |
| Fady Malik | $653K | Oct 21, 2025 | filing ↗ |
| Edward Kaye | $385K | Oct 6, 2025 | filing ↗ |
| Robert Blum | $824K | Oct 1, 2025 | filing ↗ |
| Edward Kaye | $361K | Sep 30, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Other events (8.01) | Aug 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 28, 2026 | filing ↗ |
| Other events (8.01) | Aug 13, 2026 | filing ↗ |
| Earnings (2.02) | Aug 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 6, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 27, 2026 | filing ↗ |
| Other events (8.01) | May 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 6, 2026 | filing ↗ |
| Other events (8.01) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Earnings (2.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Earnings (2.02) | Feb 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 24, 2026 | filing ↗ |
| Other events (8.01) | Feb 17, 2026 | filing ↗ |
| Other events (8.01) | Dec 19, 2025 | filing ↗ |
| Other events (8.01) | Dec 12, 2025 | filing ↗ |
| Officer/director changes (5.02) | Nov 13, 2025 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Material agreement (1.01) | Sep 16, 2025 | filing ↗ |
| New financial obligation (2.03) | Sep 16, 2025 | filing ↗ |
| Unregistered equity sale (3.02) | Sep 16, 2025 | filing ↗ |
| Other events (8.01) | Sep 16, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 16, 2025 | filing ↗ |