Cytokinetics Inc (CYTK) Insider Ownership

Historic Insider Ownership Trends

Based on data from the past 90 days ending January 10, 2026, Cytokinetics's three largest insider shareholders are President & Ceo Robert I Blum (401.69K shares), Chief Hr & Admin Officer David Cragg (153.23K shares), Evp Research & Development Fady Ibraham Malik (141.54K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Robert I Blum President & Ceo 401,687 24 Dec, 2025
David Cragg Chief Hr & Admin Officer 153,233 08 Mar, 2022
Fady Ibraham Malik Evp Research & Development 141,536 24 Dec, 2025
Mark A Schlossberg Svp Legal & General Counsel 103,408 15 Mar, 2022
Ching Jaw Svp Finance & Cfo 87,346 07 Mar, 2023
Jeffrey Hessekiel Chief Legal & Admin Officer 87,297 17 Nov, 2025
John T Henderson 74,661 02 Dec, 2025
Sung Lee Evp And Chief Financial Officer 71,416 29 Dec, 2025
Andrew Callos Evp And Chief Commercial Officer 50,440 05 Jan, 2026
Brett A Pletcher Evp And Chief Legal Officer 33,140 03 Sep, 2024
Wendell Wierenga 32,444 23 Dec, 2025
Wendall Wierenga 32,345 16 Jul, 2025
Nancy Wysenski 30,873 16 Oct, 2025
L Patrick Gage 28,932 08 Nov, 2021
Muna Bhanji 23,510 15 May, 2025
B Lynne Parshall 22,933 19 Nov, 2025
Santo J Costa 20,600 16 May, 2024
Sandford D Smith 18,801 03 Jan, 2024
Robert Wong Vp And Chief Accounting Officer 18,655 05 Dec, 2024
Robert Arthur Harrington 18,542 02 Dec, 2025
Edward M. Md Kaye 9,977 02 Dec, 2025
Robert E Landry 7,333 14 May, 2025
Robert Califf 6,003 04 Jan, 2022

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
05 Jan, 2026 Andrew Callos Common Stock D 15,000 $60.28 50,440 D S
05 Jan, 2026 Andrew Callos Common Stock A 15,000 $23.26 65,440 D M
02 Jan, 2026 Andrew Callos Common Stock A 885 $37.63 51,325 D M
02 Jan, 2026 Andrew Callos Common Stock D 913 $62.09 50,440 D S
02 Jan, 2026 Andrew Callos Common Stock D 885 $63.16 50,440 D S
29 Dec, 2025 Andrew Callos Common Stock D 1,809 $62.44 51,353 D S
22 Dec, 2025 Wendell Wierenga Common Stock A 20,000 $7.61 52,444 D M
22 Dec, 2025 Wendell Wierenga Common Stock D 20,000 $66.14 32,444 D S
22 Dec, 2025 Robert I Blum Common Stock A 54,727 $6.67 404,929 D M
22 Dec, 2025 Robert I Blum - - 391,009 D
22 Dec, 2025 Robert I Blum Common Stock A 16,506 $6.67 391,009 D M
22 Dec, 2025 Robert I Blum Common Stock D 2,935 $62.72 399,604 D F
22 Dec, 2025 Robert I Blum Common Stock A 5,765 $0.00 402,539 D A
22 Dec, 2025 Robert I Blum Common Stock A 5,765 $0.00 396,774 D A
22 Dec, 2025 Robert I Blum - - 374,503 D
22 Dec, 2025 Robert I Blum Common Stock D 30,426 $68.18 374,503 D F
22 Dec, 2025 Fady Ibraham Malik Common Stock A 2,000 $0.00 142,552 D A
22 Dec, 2025 Fady Ibraham Malik Common Stock D 1,016 $62.72 141,536 D F
22 Dec, 2025 Fady Ibraham Malik Common Stock A 2,000 $0.00 140,552 D A
22 Dec, 2025 Sung Lee Common Stock A 2,152 $0.00 72,221 D A