Cytokinetics CYTK Insider Ownership

NASDAQ CYTK

$65.64 -0.52 (-0.79%)

At close: Sep 29, 2026 · 4:00 PM EDT

Insider Holdings by Owner

1.39Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

1.06%

▼-0.085% pp QoQ

Shares Held by Insiders

1.39Mn

filed for Sep 2026

▼-7.49% QoQ

Shares Outstanding

132.09Mn

132,086,000 shares

Direct Holdings

1.39Mn

Indirect: 0

Net Shares Traded (QoQ)

-112.91K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

Cytokinetics's top three insider shareholders as of September 29, 2026 are Robert I Blum (President Ceo, 278.54K shares), Fady Ibraham Malik (Evp Research Development, 153.90K shares), David Cragg (Chief Hr Admin Officer, 153.23K shares).

A detailed ownership breakdown for Cytokinetics is not available at this time.
According to Business Quant data, insider ownership at Cytokinetics stands at 114.06%, comprising 1.51Mn shares out of 132.09Mn total outstanding.
Their combined stake in CYTK fell 3.68%, moving from 1.56Mn shares to 1.51Mn shares.
Among CYTK's top brass, Robert I Blum (President Ceo) topped buying activity, purchasing 142.92K shares during the 90 days through September 29, 2026.
On the flip side, Robert I Blum (President Ceo) was the biggest seller at CYTK, selling 287.19K shares in the 90 days through September 29, 2026.

Form 4 Holdings

Insiders Holding CYTK

Insiders 24

Shares held 1.39Mn

Of outstanding 1.06%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Robert I Blum	President Ceo	278,544	278,544	20.0%	28 Sep, 2026
2	Fady Ibraham Malik	Evp Research Development	153,902	153,902	11.0%	22 Sep, 2026
3	David Cragg	Chief Hr Admin Officer	153,233	153,233	11.0%	08 Mar, 2022
4	Jeffrey Hessekiel	Chief Legal Admin Officer	107,943	107,943	7.7%	17 Mar, 2026
5	Mark A Schlossberg	Svp Legal General Counsel	103,408	103,408	7.4%	15 Mar, 2022
6	Ching Jaw	Svp Finance Cfo	87,346	87,346	6.3%	07 Mar, 2023
7	John T Henderson	Director	78,360	78,360	5.6%	16 Jul, 2026
8	Sung Lee	Evp, Chief Financial Officer	63,221	63,221	4.5%	02 Jul, 2026
9	Andrew Callos	Evp, Chief Commercial Officer	58,555	58,555	4.2%	31 Aug, 2026
10	Wendell Wierenga	Director	35,563	35,563	2.6%	16 Jul, 2026
11	Nancy Wysenski	Director	33,992	33,992	2.4%	16 Jul, 2026
12	Brett A Pletcher	Evp, Chief Legal Officer	33,140	33,140	2.4%	03 Sep, 2024
13	Wendall Wierenga	Director	32,345	32,345	2.3%	16 Jul, 2025
14	L Patrick Gage	Director	28,932	28,932	2.1%	08 Nov, 2021
15	Muna Bhanji	Director	26,361	26,361	1.9%	27 May, 2026
16	Robert Arthur Harrington	Director	21,932	21,932	1.6%	16 Jul, 2026
17	Santo J Costa	Director	20,600	20,600	1.5%	16 May, 2024
18	Sandford D Smith	Director	18,801	18,801	1.3%	03 Jan, 2024
19	Robert Wong	Vp, Chief Accounting Officer	18,655	18,655	1.3%	05 Dec, 2024
20	B Lynne Parshall	Director	10,784	10,784	0.8%	01 Sep, 2026
21	Edward M. Md Kaye	Director	10,434	10,434	0.7%	16 Jul, 2026
22	Robert E Landry	Director	8,184	8,184	0.6%	15 Sep, 2026
23	Robert Califf	Director	6,003	6,003	0.4%	04 Jan, 2022
24	James M Daly	Director	3,390	3,390	0.2%	16 Jul, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

3,059 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
28 Sep, 2026	Robert I Blum	President Ceo	Acquired M	7,500	$10.60	$79.50K	286,044	Direct
28 Sep, 2026	Robert I Blum	President Ceo	Disposed S	7,500	$65.46	$490.95K	278,544	Direct
28 Sep, 2026	Robert I Blum	President Ceo	Disposed M	7,500	$0.00	$0	149,245	Direct
22 Sep, 2026	Fady Ibraham Malik	Evp Research Development	Acquired M	3,500	$7.80	$27.30K	157,402	Direct
22 Sep, 2026	Fady Ibraham Malik	Evp Research Development	Disposed S	3,500	$68.29	$239.02K	153,902	Direct
22 Sep, 2026	Fady Ibraham Malik	Evp Research Development	Disposed M	3,500	$0.00	$0	23,386	Direct
11 Sep, 2026	Robert E Landry	Director	Disposed S	1,000	$74.66	$74.66K	9,184	Direct
08 Sep, 2026	Fady Ibraham Malik	Evp Research Development	Acquired M	3,500	$7.80	$27.30K	157,402	Direct
08 Sep, 2026	Fady Ibraham Malik	Evp Research Development	Disposed S	3,500	$75.46	$264.11K	153,902	Direct
08 Sep, 2026	Fady Ibraham Malik	Evp Research Development	Disposed M	3,500	$0.00	$0	26,886	Direct
01 Sep, 2026	B Lynne Parshall	Director	Disposed S	5,000	$71.48	$357.40K	10,784	Direct
31 Aug, 2026	Robert I Blum	President Ceo	Acquired M	7,500	$10.60	$79.50K	385,320	Direct
31 Aug, 2026	Andrew Callos	Evp, Chief Commercial Officer	Acquired M	10,000	$23.26	$232.60K	68,555	Direct
31 Aug, 2026	Robert I Blum	President Ceo	Disposed S	7,500	$70.24	$526.80K	377,820	Direct
31 Aug, 2026	Andrew Callos	Evp, Chief Commercial Officer	Disposed S	10,000	$70.24	$702.40K	58,555	Direct
31 Aug, 2026	Andrew Callos	Evp, Chief Commercial Officer	Disposed M	10,000	$0.00	$0	0	Direct
31 Aug, 2026	Robert I Blum	President Ceo	Disposed M	7,500	$0.00	$0	164,245	Direct
18 Aug, 2026	Fady Ibraham Malik	Evp Research Development	Acquired M	3,500	$7.80	$27.30K	157,402	Direct
18 Aug, 2026	Fady Ibraham Malik	Evp Research Development	Disposed S	3,500	$75.82	$265.37K	153,902	Direct
18 Aug, 2026	Fady Ibraham Malik	Evp Research Development	Disposed M	3,500	$0.00	$0	30,386	Direct

Showing 1 to 20 of 3,059 transactions