Cytokinetics CYTK Insider Ownership

NASDAQ CYTK

$72.58 -1.37 (-1.85%)

As of: Sep 4, 2026 · 2:21 PM EDT

Insider Holdings by Owner

1.49Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

1.25%

▼-0.0097% pp QoQ

Shares Held by Insiders

1.49Mn

filed for Sep 2026

▼-0.77% QoQ

Shares Outstanding

119.98Mn

119,982,000 shares

Direct Holdings

1.49Mn

Indirect: 0

Net Shares Traded (QoQ)

-11.64K

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

As of August 29, 2026, Cytokinetics's top three insider holders are Robert I Blum (President Ceo, 377.82K 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.
Insider holdings in CYTK account for 0.25% of outstanding stock, totaling 3.24K shares from a 132.09Mn share base, per Business Quant data.
Cytokinetics's count of insider shares amounted to 3.24K as of August 29, 2026.
Among Cytokinetics's top brass, Andrew Callos (Evp, Chief Commercial Officer) was the biggest buyer, purchasing 44.00K shares during the 90-day period from May 31, 2026 to August 29, 2026.
On the flip side, Andrew Callos (Evp, Chief Commercial Officer) was the biggest seller at CYTK, selling 88.00K shares in the 90 days through August 29, 2026.

Form 4 Holdings

Insiders Holding CYTK

Insiders 24

Shares held 1.49Mn

Of outstanding 1.25%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Robert I Blum	President Ceo	377,820	377,820	25.3%	31 Aug, 2026
2	Fady Ibraham Malik	Evp Research Development	153,902	153,902	10.3%	18 Aug, 2026
3	David Cragg	Chief Hr Admin Officer	153,233	153,233	10.3%	08 Mar, 2022
4	Jeffrey Hessekiel	Chief Legal Admin Officer	107,943	107,943	7.2%	17 Mar, 2026
5	Mark A Schlossberg	Svp Legal General Counsel	103,408	103,408	6.9%	15 Mar, 2022
6	Ching Jaw	Svp Finance Cfo	87,346	87,346	5.8%	07 Mar, 2023
7	John T Henderson	Director	78,360	78,360	5.2%	16 Jul, 2026
8	Sung Lee	Evp, Chief Financial Officer	63,221	63,221	4.2%	02 Jul, 2026
9	Andrew Callos	Evp, Chief Commercial Officer	58,555	58,555	3.9%	31 Aug, 2026
10	Wendell Wierenga	Director	35,563	35,563	2.4%	16 Jul, 2026
11	Nancy Wysenski	Director	33,992	33,992	2.3%	16 Jul, 2026
12	Brett A Pletcher	Evp, Chief Legal Officer	33,140	33,140	2.2%	03 Sep, 2024
13	Wendall Wierenga	Director	32,345	32,345	2.2%	16 Jul, 2025
14	L Patrick Gage	Director	28,932	28,932	1.9%	08 Nov, 2021
15	Muna Bhanji	Director	26,361	26,361	1.8%	27 May, 2026
16	Robert Arthur Harrington	Director	21,932	21,932	1.5%	16 Jul, 2026
17	Santo J Costa	Director	20,600	20,600	1.4%	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	1.2%	05 Dec, 2024
20	B Lynne Parshall	Director	10,784	10,784	0.7%	01 Sep, 2026
21	Edward M. Md Kaye	Director	10,434	10,434	0.7%	16 Jul, 2026
22	Robert E Landry	Director	10,184	10,184	0.7%	27 May, 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

11,438 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
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
10 Aug, 2026	Robert I Blum	President Ceo	Acquired M	7,500	$10.60	$79.50K	385,320	Direct
10 Aug, 2026	Robert I Blum	President Ceo	Disposed S	7,500	$76.76	$575.70K	377,820	Direct
10 Aug, 2026	Robert I Blum	President Ceo	Disposed M	7,500	$0.00	$0	171,745	Direct
30 Jul, 2026	Andrew Callos	Evp, Chief Commercial Officer	Acquired M	14,000	$23.26	$325.64K	72,555	Direct
30 Jul, 2026	Andrew Callos	Evp, Chief Commercial Officer	Disposed S	14,000	$79.88	$1.12Mn	58,555	Direct
30 Jul, 2026	Andrew Callos	Evp, Chief Commercial Officer	Disposed M	14,000	$0.00	$0	10,000	Direct
27 Jul, 2026	Robert I Blum	President Ceo	Acquired M	7,500	$10.60	$79.50K	385,320	Direct
27 Jul, 2026	Robert I Blum	President Ceo	Disposed S	7,500	$80.87	$606.53K	377,820	Direct
27 Jul, 2026	Robert I Blum	President Ceo	Disposed M	7,500	$0.00	$0	179,245	Direct
21 Jul, 2026	Fady Ibraham Malik	Evp Research Development	Acquired M	3,500	$7.80	$27.30K	157,402	Direct

Showing 1 to 20 of 11,438 transactions