SEC Form 4 · accession 0001061983-26-000094

CYTOKINETICS INC · CYTK

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Robert I Blum

Officer — President & CEO · Director

Period of report

Sep 14, 2026

Accepted (ET)

Sep 15, 2026 · 5:20 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0001061983

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock	Sep 14, 2026	M	7,500	$10.60	A	385,320	D
Common Stock	Sep 14, 2026	S	7,500	$73.44	D	377,820	D
Common Stock	Sep 14, 2026	G	1,350	$0.00	D	376,470	D
Common Stock	Sep 14, 2026	G	97,926	$0.00	D	278,544	D
Common Stock	Sep 14, 2026	G	97,926	$0.00	A	97,926	I	by Trust 3. Beneficial Ownership Disclaimed.
Common Stock	Sep 15, 2026	S	97,926	$69.33	D	0	I	by Trust 3. Beneficial Ownership Disclaimed.
Common Stock^F7	holding	—	—		—	2,083	I	by Trust 1. Beneficial Ownership disclaimed.
Common Stock^F8	holding	—	—		—	2,083	I	by Trust 2. Beneficial Ownership Disclaimed.

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Non-Qualified Stock Option (Right to Buy)	$10.60	Sep 14, 2026	M	7,500	D	Mar 28, 2017	Feb 28, 2027	Common Stock	7,500	156,745	D

Explanation of responses

F1Acquisition of shares of common stock upon exercise of stock options. Transaction is pursuant to a trading plan adopted by the reporting person intended to satisfy the conditions of Rule 10b5-1(c).
F2Sale of shares of common stock acquired upon exercise of stock options. Transaction is pursuant to a trading plan adopted by the reporting person intended to satisfy the conditions of Rule 10b5-1(c).
F3Charitable gift.
F4Transfer of shares of common stock to The Bridget Blum 2026 Irrevocable Trust, of which reporting person is a co-trustee. Reporting person disclaims any beneficial ownership interest in the shares held by the aforementioned trust upon completion of the gift transfer.
F5Acquisition of shares by The Bridget Blum 2026 Irrevocable Trust, of which reporting person is a co-trustee. Reporting person disclaims any beneficial ownership interest in the shares held by the aforementioned trust.
F6Sale of shares of common stock by The Bridget Blum 2026 Irrevocable Trust, of which reporting person is a co-trustee. Reporting person disclaims any beneficial ownership interest in the shares sold or the proceeds thereof.
F7Shares held by The Bridget Blum 2003 Irrevocable Trust, of which reporting person is a co-trustee. Reporting person disclaims any beneficial ownership interest in the Shares.
F8Shares held by The Brittany Blum 2003 Irrevocable Trust, of which reporting person is a co-trustee. Reporting person disclaims any beneficial ownership interest in the Shares.
F9Exercise of stock options. Transaction is pursuant to a trading plan adopted by the reporting person intended to satisfy the conditions of Rule 10b5-1(c).