Harrington Robert Arthur - Insider Non-Derivative Transactions at CYTOKINETICS INC (CYTK) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Dec 1, 2025, Harrington Robert Arthur's relationship to CYTOKINETICS INC (CYTK) is Director, and currently has 18,542 shares of Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other CYTK insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Harrington Robert Arthur - Insider Non-Derivative Transactions of CYTK Common Stock

Harrington Robert Arthur - Insider Non-Derivative Transactions at CYTK

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Dec 2, 2025	Sell -- (Common Stock)	2150	66.8	18542
Oct 16, 2025	Acquisition -- (Common Stock)	199	62.8	20692
Sep 3, 2025	Sell -- (Common Stock)	2150	48.67	20493
Jul 16, 2025	Acquisition -- (Common Stock)	328	38.01	22643
May 15, 2025	Acquisition -- (Common Stock)	7333	0	22315
Apr 16, 2025	Acquisition -- (Common Stock)	324	38.56	14982
Apr 4, 2025	Sell -- (Common Stock)	450	39.43	14658
Mar 5, 2025	Sell -- (Common Stock)	900	42.5	15108
Jan 3, 2025	Acquisition -- (Common Stock)	255	48.93	16008
Oct 2, 2024	Acquisition -- (Common Stock)	237	52.6	15753
Jul 6, 2024	Sell -- (Common Stock)	253	54.61	15516
Jul 2, 2024	Acquisition -- (Common Stock)	228	0	15769
Jun 4, 2024	Sell -- (Common Stock)	1580	48.64	15541
May 16, 2024	Acquisition -- (Common Stock)	5600	0	17121
Jan 3, 2024	Acquisition -- (Common Stock)	148	84.12	11521
Oct 3, 2023	Acquisition -- (Common Stock)	448	27.88	11373
Jul 4, 2023	Acquisition -- (Common Stock)	374	33.36	10925
May 11, 2023	Acquisition -- (Common Stock)	5000	0	10551
Apr 4, 2023	Acquisition -- (Common Stock)	298	37.71	5551
Jan 4, 2023	Acquisition -- (Common Stock)	253	44.35	5253