Company · Ownership research

CYTOKINETICS INC CYTK

CIK 0001061983 · CUSIP 23282W605

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 23282W605 (CYTK), not CUSIP 23282W905 (CYTK), CUSIP 23282W955 (CYTK), CUSIP 23282Q605 (CYTK), and does not merge CUSIPs.

This page lists the top 20 of 432 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	T. Rowe Price Investment Management, Inc. CIK 1897612 · Amended · View history	$1.13B 17,716,372 shares	0.71%	-1.36M(-7.10%)Reduced	SEC filing ↗ Feb 19, 2026	▾
02	BlackRock, Inc. CIK 2012383 · View history	$1.04B 16,395,123 shares	0.02%	+869.38K(+5.60%)Added	SEC filing ↗ Feb 12, 2026	▾
03	FMR LLC CIK 315066 · View history	$813.80M 12,807,752 shares	0.04%	-283.89K(-2.20%)Reduced	SEC filing ↗ Feb 17, 2026	▾
04	VANGUARD GROUP INC CIK 102909 · View history	$765.54M 12,048,131 shares	0.01%	+191.34K(+1.60%)Added	SEC filing ↗ Jan 29, 2026	▾
05	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$504.32M 7,937,063 shares	0.09%	+528.50K(+7.10%)Added	SEC filing ↗ Feb 17, 2026	▾
06	STATE STREET CORP CIK 93751 · View history	$370.14M 5,825,295 shares	0.01%	+207.96K(+3.70%)Added	SEC filing ↗ Feb 13, 2026	▾
07	Deep Track Capital, LP CIK 1856083 · View history	$212.03M 3,336,998 shares	4.84%	-963.00K(-22.40%)Reduced	SEC filing ↗ Feb 13, 2026	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$194.21M 3,056,017 shares	0.01%	+15.81K(+0.50%)Added	SEC filing ↗ Feb 9, 2026	▾
09	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$186.88M 2,941,152 shares	0.01%	-120.64K(-3.90%)Reduced	SEC filing ↗ Feb 17, 2026	▾
10	RTW INVESTMENTS, LP CIK 1493215 · View history	$172.90M 2,721,158 shares	1.73%	0(0.00%)Unchanged	SEC filing ↗ Feb 17, 2026	▾
11	Polar Capital Holdings Plc CIK 1837309 · View history	$153.93M 2,422,612 shares	0.70%	-360.32K(-12.90%)Reduced	SEC filing ↗ Feb 17, 2026	▾
12	GOLDMAN SACHS GROUP INC CIK 886982 · Amended · View history	$150.70M 2,371,679 shares	0.02%	+736.96K(+45.10%)Added	SEC filing ↗ Mar 25, 2026	▾
13	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$122.64M 1,930,119 shares	0.01%	-436.73K(-18.50%)Reduced	SEC filing ↗ Feb 17, 2026	▾
14	Woodline Partners LP CIK 1784547 · View history	$104.74M 1,648,428 shares	0.41%	+703(0.00%)Added	SEC filing ↗ Feb 17, 2026	▾
15	JPMORGAN CHASE & CO CIK 19617 · View history	$89.77M 1,412,797 shares	0.01%	-130.06K(-8.40%)Reduced	SEC filing ↗ Feb 11, 2026	▾
16	Integral Health Asset Management, LLC CIK 1773206 · View history	$88.96M 1,400,000 shares	4.51%	0(0.00%)Unchanged	SEC filing ↗ Feb 17, 2026	▾
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$87.90M 1,383,437 shares	0.01%	+9.55K(+0.70%)Added	SEC filing ↗ Feb 13, 2026	▾
18	NORTHERN TRUST CORP CIK 73124 · View history	$87.74M 1,380,787 shares	0.01%	-26.05K(-1.90%)Reduced	SEC filing ↗ Feb 17, 2026	▾
19	MORGAN STANLEY CIK 895421 · Amended · View history	$80.40M 1,265,301 shares	0.00%	-255.88K(-16.80%)Reduced	SEC filing ↗ May 27, 2026	▾
20	Capital International Investors CIK 1562230 · View history	$74.90M 1,178,780 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Feb 11, 2026	▾

Showing 20 / 432 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

432

Cancelled or null records excluded

Disclosed shares

139,543,768

Not deduplicated across managers

Disclosed value

$8.87B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

CYTOKINETICS INC · Q4 2025

Explore all 432 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.