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 382 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 · View history	$1.05B 19,080,496 shares	0.64%	+1.48M(+8.40%)Added	SEC filing ↗ Nov 14, 2025	▾
02	BlackRock, Inc. CIK 2012383 · View history	$853.30M 15,525,747 shares	0.02%	-152.12K(-1.00%)Reduced	SEC filing ↗ Nov 12, 2025	▾
03	FMR LLC CIK 315066 · View history	$719.52M 13,091,647 shares	0.04%	+1.82M(+16.20%)Added	SEC filing ↗ Nov 13, 2025	▾
04	VANGUARD GROUP INC CIK 102909 · View history	$651.65M 11,856,795 shares	0.01%	-127.04K(-1.10%)Reduced	SEC filing ↗ Nov 7, 2025	▾
05	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$407.17M 7,408,561 shares	0.07%	-419.12K(-5.40%)Reduced	SEC filing ↗ Nov 14, 2025	▾
06	STATE STREET CORP CIK 93751 · View history	$308.73M 5,617,334 shares	0.01%	-755.42K(-11.90%)Reduced	SEC filing ↗ Nov 14, 2025	▾
07	Deep Track Capital, LP CIK 1856083 · View history	$236.33M 4,300,000 shares	6.60%	+650.00K(+17.80%)Added	SEC filing ↗ Nov 14, 2025	▾
08	BANK OF AMERICA CORP /DE/ CIK 70858 · Amended · View history	$168.28M 3,061,796 shares	0.01%	+416.23K(+15.70%)Added	SEC filing ↗ Feb 3, 2026	▾
09	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$167.11M 3,040,202 shares	0.01%	+45.76K(+1.50%)Added	SEC filing ↗ Nov 12, 2025	▾
10	Polar Capital Holdings Plc CIK 1837309 · View history	$152.95M 2,782,930 shares	0.74%	-15.47K(-0.60%)Reduced	SEC filing ↗ Nov 14, 2025	▾
11	RTW INVESTMENTS, LP CIK 1493215 · View history	$149.55M 2,721,158 shares	1.84%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2025	▾
12	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$130.08M 2,366,848 shares	0.01%	+500.87K(+26.80%)Added	SEC filing ↗ Nov 14, 2025	▾
13	UBS Group AG CIK 1610520 · View history	$99.11M 1,803,251 shares	0.02%	-1.27M(-41.30%)Reduced	SEC filing ↗ Nov 13, 2025	▾
14	Woodline Partners LP CIK 1784547 · View history	$90.56M 1,647,725 shares	0.43%	+1.44M(+676.10%)Added	SEC filing ↗ Nov 14, 2025	▾
15	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$89.84M 1,634,723 shares	0.01%	+360.74K(+28.30%)Added	SEC filing ↗ Nov 14, 2025	▾
16	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$84.80M 1,542,857 shares	0.01%	+225.44K(+17.10%)Added	SEC filing ↗ Nov 26, 2025	▾
17	MORGAN STANLEY CIK 895421 · Amended · View history	$83.60M 1,521,186 shares	0.01%	+403.11K(+36.10%)Added	SEC filing ↗ May 27, 2026	▾
18	NORTHERN TRUST CORP CIK 73124 · View history	$77.32M 1,406,832 shares	0.01%	+27.64K(+2.00%)Added	SEC filing ↗ Nov 14, 2025	▾
19	Integral Health Asset Management, LLC CIK 1773206 · View history	$76.94M 1,400,000 shares	5.61%	+400.00K(+40.00%)Added	SEC filing ↗ Nov 14, 2025	▾
20	CITADEL ADVISORS LLC CIK 1423053 · View history	$76.18M 1,386,065 shares	0.06%	+87.46K(+6.70%)Added	SEC filing ↗ Nov 14, 2025	▾

Showing 20 / 382 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

382

Cancelled or null records excluded

Disclosed shares

141,276,041

Not deduplicated across managers

Disclosed value

$7.75B

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 · Q3 2025

Explore all 382 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.