Company · Ownership research

CYTOKINETICS INC CYTK

CIK 0001061983

Form 4 transactions dated Nov 1, 2023 to Nov 8, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 76 rows; the complete set is available through the API.

Insider filings on file run through Nov 3, 2026.

Insider purchases & sales

Purchased: $0.00
Sold: $100.55M

Nov 1, 2023 – Nov 3, 2026
Available records · partial months are marked ·

202510 of 30 preview events · 76 available in 2025

Date	Insider	Activity	Trade value (USD)	% of prior holding
Dec 29, 2025	Callos Andrew EVP, Chief Commercial Officer	Sale	$112.95K 1,809 shares sold	3.40% sold Direct holding	▾
Dec 22, 2025	WIERENGA WENDELL Director	Sale	$1.32M 20,000 shares sold	38.14% sold Direct holding	▾
Dec 16, 2025	Malik Fady Ibraham EVP Research & Development	Sale	$134.73K 2,200 shares sold	1.56% sold Direct holding	▾
Dec 8, 2025	Callos Andrew EVP, Chief Commercial Officer	Sale	$68.73K 1,042 shares sold	2.02% sold Direct holding	▾
Dec 5, 2025	Callos Andrew EVP, Chief Commercial Officer	Sale	$3.46M 52,486 shares sold	50.89% sold Direct holding	▾
Dec 2, 2025	HENDERSON JOHN T Director	Sale	$559.13K 8,750 shares sold	10.50% sold Direct holding	▾
Dec 2, 2025	Malik Fady Ibraham EVP Research & Development	Sale	$140.56K 2,200 shares sold	1.54% sold Direct holding	▾
Dec 1, 2025	Kaye Edward M. MD Director	Sale	$1.87M 28,064 shares sold	73.77% sold Direct holding	▾
Dec 1, 2025	Harrington Robert Arthur Director	Sale	$143.62K 2,150 shares sold	10.39% sold Direct holding	▾
Nov 19, 2025	PARSHALL B LYNNE Director	Sale	$323.65K 5,000 shares sold	17.90% sold Direct holding	▾

Showing 30 / 76 record groups in 2025. The complete set is available through the API.

CYTOKINETICS INC · CYTK

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 30 of 76 purchase / sale groups and 30 of 144 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"CYTK","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.