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 441 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	$1.15B 17,523,840 shares	0.80%	-192.53K(-1.10%)Reduced	SEC filing ↗ May 15, 2026	▾
02	BlackRock, Inc. CIK 2012383 · View history	$1.09B 16,548,011 shares	0.02%	+152.89K(+0.90%)Added	SEC filing ↗ May 13, 2026	▾
03	FMR LLC CIK 315066 · View history	$706.76M 10,723,140 shares	0.04%	-2.08M(-16.30%)Reduced	SEC filing ↗ May 15, 2026	▾
04	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$527.91M 8,009,489 shares	0.10%	+72.43K(+0.90%)Added	SEC filing ↗ May 15, 2026	▾
05	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$385.16M 5,843,782 shares	0.02%	—	SEC filing ↗ May 8, 2026	▾
06	STATE STREET CORP CIK 93751 · View history	$378.67M 5,745,193 shares	0.01%	-80.10K(-1.40%)Reduced	SEC filing ↗ May 15, 2026	▾
07	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$361.76M 5,488,634 shares	0.01%	—	SEC filing ↗ May 15, 2026	▾
08	Avoro Capital Advisors LLC CIK 1633313 · View history	$219.70M 3,333,333 shares	2.16%	+3.33MNew	SEC filing ↗ May 15, 2026	▾
09	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$211.97M 3,215,415 shares	0.01%	+159.40K(+5.20%)Added	SEC filing ↗ May 15, 2026	▾
10	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$206.00M 3,125,436 shares	0.02%	+184.28K(+6.30%)Added	SEC filing ↗ May 18, 2026	▾
11	RTW INVESTMENTS, LP CIK 1493215 · View history	$179.35M 2,721,158 shares	1.78%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
12	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$145.38M 2,205,758 shares	0.02%	-165.92K(-7.00%)Reduced	SEC filing ↗ May 15, 2026	▾
13	UBS Group AG CIK 1610520 · View history	$136.91M 2,077,277 shares	0.02%	+945.82K(+83.60%)Added	SEC filing ↗ May 5, 2026	▾
14	Polar Capital Holdings Plc CIK 1837309 · View history	$109.49M 1,661,248 shares	0.48%	-761.36K(-31.40%)Reduced	SEC filing ↗ May 15, 2026	▾
15	Integral Health Asset Management, LLC CIK 1773206 · View history	$105.46M 1,600,000 shares	5.58%	+200.00K(+14.30%)Added	SEC filing ↗ May 15, 2026	▾
16	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$104.42M 1,584,321 shares	0.01%	-345.80K(-17.90%)Reduced	SEC filing ↗ May 15, 2026	▾
17	MORGAN STANLEY CIK 895421 · View history	$99.20M 1,505,075 shares	0.01%	+239.77K(+18.90%)Added	SEC filing ↗ May 15, 2026	▾
18	Paradigm Biocapital Advisors LP CIK 1855655 · View history	$97.60M 1,480,857 shares	1.99%	+1.48MNew	SEC filing ↗ May 15, 2026	▾
19	NORTHERN TRUST CORP CIK 73124 · View history	$95.02M 1,441,634 shares	0.01%	+60.85K(+4.40%)Added	SEC filing ↗ May 14, 2026	▾
20	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$92.08M 1,397,045 shares	0.01%	+13.61K(+1.00%)Added	SEC filing ↗ May 15, 2026	▾

Showing 20 / 441 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

441

Cancelled or null records excluded

Disclosed shares

146,086,013

Not deduplicated across managers

Disclosed value

$9.62B

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 · Q1 2026

Explore all 441 reporting institutions.

This page includes 20 of 441 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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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.