Cytokinetics Inc

CYTK

Exchange: Nasdaq
Industry: Pharmaceutical Preparations
SEC CIK: 0001061983

SEC filings (opens in a new tab)

In the last 90 days, Cytokinetics Inc insiders filed 0 open-market purchases and 15 sales; 482 institutions reported holding it in 13F filings for Q2 2026, worth $13.7B in total; no superinvestor holds it.

13F holders, Q3 2026

Institutional positions in Cytokinetics Inc as of Sep 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Q3 2026 data is still coming in (13F filing deadline: Nov 16, 2026), so these numbers are incomplete.

Institutional holders: 2; −1 vs. Q2 2026
Shares held: 490; −54 (−9.9%) vs. Q2 2026
Total value: $32.3K; −$14.0K (−30.3%) vs. Q2 2026
New holders: 0; 1 more added
Sold out: 1; 1 more reduced

479 institutions that held it in Q2 2026 haven't filed for Q3 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting CYTK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holders

Value held

Institutions holding CYTK and their total value by quarter
Quarter	Holders	Value
Q2 2026	482	$13.7B
Q1 2026	441	$9.63B
Q4 2025	431	$8.87B
Q3 2025	381	$7.75B
Q2 2025	312	$4.55B
Q1 2025	356	$5.48B
Q4 2024	347	$6.18B
Q3 2024	348	$7.20B
Q2 2024	344	$7.34B
Q1 2024	390	$8.26B
Q4 2023	347	$9.54B
Q3 2023	251	$3.22B
Q2 2023	253	$3.55B
Q1 2023	263	$3.83B
Q4 2022	278	$4.88B
Q3 2022	276	$5.08B
Q2 2022	263	$4.16B
Q1 2022	240	$3.52B
Q4 2021	250	$4.16B
Q3 2021	211	$3.22B
Q2 2021	191	$1.50B
Q1 2021	193	$1.74B

Institutions, Q3 2026

Shares, value and share of portfolio for each institution holding Cytokinetics Inc; share changes are against Q2 2026.

Institutions holding CYTK in Q3 2026
Institution	Shares	Value	% of portfolio	Change in shares	Action
Massmutual Trust Co FSB	376	$24.8K	0.00%	−72−16.1%	Reduced
Versant Capital Management, Inc	114	$7.51K	0.00%	+28+32.6%	Added
Eastern Bank	0	$0	0.00%	−10−100.0%	Sold out
BlackRock, Inc.	–	–	–	–	Not filed
T. Rowe Price Investment Management, Inc.	–	–	–	–	Not filed
Wellington Management Group LLP	–	–	–	–	Not filed
Vanguard Portfolio Management LLC	–	–	–	–	Not filed
State Street Corp	–	–	–	–	Not filed
Vanguard Capital Management LLC	–	–	–	–	Not filed
FMR LLC	–	–	–	–	Not filed
Avoro Capital Advisors LLC	–	–	–	–	Not filed
Bank of America Corp	–	–	–	–	Not filed
Geode Capital Management, LLC	–	–	–	–	Not filed
RTW Investments, LP	–	–	–	–	Not filed
Polar Capital Holdings Plc	–	–	–	–	Not filed
Price T Rowe Associates Inc	–	–	–	–	Not filed
Goldman Sachs Group Inc	–	–	–	–	Not filed
Capital Research Global Investors	–	–	–	–	Not filed
Northern Trust Corp	–	–	–	–	Not filed
JPMorgan Chase & Co	–	–	–	–	Not filed
William Blair Investment Management, LLC	–	–	–	–	Not filed
Integral Health Asset Management, LLC	–	–	–	–	Not filed
Point72 Asset Management, L.P.	–	–	–	–	Not filed
Charles Schwab Investment Management Inc	–	–	–	–	Not filed
Susquehanna International Group, LLP	–	–	–	–	Not filed
Morgan Stanley	–	–	–	–	Not filed
Principal Financial Group Inc	–	–	–	–	Not filed
Capital International Investors	–	–	–	–	Not filed
Invesco Ltd.	–	–	–	–	Not filed
Armistice Capital, LLC	–	–	–	–	Not filed
UBS Group AG	–	–	–	–	Not filed
Pictet Asset Management Holding SA	–	–	–	–	Not filed
Frazier Life Sciences Management, L.P.	–	–	–	–	Not filed
Bank of New York Mellon Corp	–	–	–	–	Not filed
Holocene Advisors, LP	–	–	–	–	Not filed
Woodline Partners LP	–	–	–	–	Not filed
D. E. Shaw & Co., Inc.	–	–	–	–	Not filed
Norges Bank	–	–	–	–	Not filed
Royalty Pharma Sub-Manager, LLC	–	–	–	–	Not filed
Nomura Asset Management International Inc.	–	–	–	–	Not filed
GW&K Investment Management, LLC	–	–	–	–	Not filed
Vanguard Fiduciary Trust Co	–	–	–	–	Not filed
Franklin Resources Inc	–	–	–	–	Not filed
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	–	–	–	–	Not filed
Melqart Asset Management (UK) Ltd	–	–	–	–	Not filed
Siren, L.L.C.	–	–	–	–	Not filed
Fisher Asset Management, LLC	–	–	–	–	Not filed
Foresite Capital Management IV, LLC	–	–	–	–	Not filed
Balyasny Asset Management LLC	–	–	–	–	Not filed
Deep Track Capital, LP	–	–	–	–	Not filed
BNP Paribas Arbitrage, SA	–	–	–	–	Not filed
Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A.	–	–	–	–	Not filed
Citadel Advisors LLC	–	–	–	–	Not filed
Qube Research & Technologies Ltd	–	–	–	–	Not filed
Brown Advisory Inc	–	–	–	–	Not filed
Eventide Asset Management, LLC	–	–	–	–	Not filed
Affinity Asset Advisors, LLC	–	–	–	–	Not filed
Massachusetts Financial Services Co	–	–	–	–	Not filed
Federated Hermes, Inc.	–	–	–	–	Not filed
First Turn Management, LLC	–	–	–	–	Not filed
American Century Companies Inc	–	–	–	–	Not filed
Checkpoint Capital L.P.	–	–	–	–	Not filed
Hood River Capital Management LLC	–	–	–	–	Not filed
Emerald Advisers, LLC	–	–	–	–	Not filed
ADAR1 Capital Management, LLC	–	–	–	–	Not filed
Ameriprise Financial Inc	–	–	–	–	Not filed
Marshall Wace, LLP	–	–	–	–	Not filed
Nuveen, LLC	–	–	–	–	Not filed
Candriam Luxembourg S.C.A.	–	–	–	–	Not filed
Rhumbline Advisers	–	–	–	–	Not filed
Alliancebernstein L.P.	–	–	–	–	Not filed
Handelsbanken Fonder AB	–	–	–	–	Not filed
Gilder Gagnon Howe & Co LLC	–	–	–	–	Not filed
TD Asset Management Inc	–	–	–	–	Not filed
Voya Investment Management LLC	–	–	–	–	Not filed
GSK plc	–	–	–	–	Not filed
Citigroup Inc	–	–	–	–	Not filed
Two Sigma Investments, LP	–	–	–	–	Not filed
E. Ohman J:or Asset Management AB	–	–	–	–	Not filed
Russell Investments Group, Ltd.	–	–	–	–	Not filed
Trails Edge Capital Partners, LP	–	–	–	–	Not filed
Bank of Montreal	–	–	–	–	Not filed
Emerald Mutual Fund Advisers Trust	–	–	–	–	Not filed
UBS Asset Management Americas Inc	–	–	–	–	Not filed
Polaris Capital Management, LLC	–	–	–	–	Not filed
Segall Bryant & Hamill, LLC	–	–	–	–	Not filed
Alyeska Investment Group, L.P.	–	–	–	–	Not filed
ExodusPoint Capital Management, LP	–	–	–	–	Not filed
Capital World Investors	–	–	–	–	Not filed
Jupiter Topco LLC	–	–	–	–	Not filed
Walleye Capital LLC	–	–	–	–	Not filed
Sarissa Capital Management LP	–	–	–	–	Not filed
Swiss National Bank	–	–	–	–	Not filed
Sphera Funds Management Ltd.	–	–	–	–	Not filed
Deutsche Bank AG	–	–	–	–	Not filed
Prudential Financial Inc	–	–	–	–	Not filed
Baker Bros. Advisors LP	–	–	–	–	Not filed
California Public Employees Retirement System	–	–	–	–	Not filed
Nicholas Investment Partners, LP	–	–	–	–	Not filed
Pinnacle Associates Ltd	–	–	–	–	Not filed