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 358 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	BlackRock, Inc. CIK 2012383 · View history	$625.51M 15,563,778 shares	0.01%	+94.40K(+0.60%)Added	SEC filing ↗ May 2, 2025	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$476.23M 11,849,547 shares	0.01%	-66.27K(-0.60%)Reduced	SEC filing ↗ May 9, 2025	▾
03	FMR LLC CIK 315066 · View history	$414.61M 10,316,131 shares	0.03%	-478.56K(-4.40%)Reduced	SEC filing ↗ May 12, 2025	▾
04	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$400.10M 9,955,251 shares	0.26%	-796.87K(-7.40%)Reduced	SEC filing ↗ May 14, 2025	▾
05	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$321.07M 7,988,740 shares	0.06%	+100.04K(+1.30%)Added	SEC filing ↗ May 13, 2025	▾
06	STATE STREET CORP CIK 93751 · View history	$244.56M 6,085,001 shares	0.01%	-82.34K(-1.30%)Reduced	SEC filing ↗ May 15, 2025	▾
07	Deep Track Capital, LP CIK 1856083 · View history	$123.54M 3,073,853 shares	4.00%	+573.85K(+23.00%)Added	SEC filing ↗ May 15, 2025	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$118.08M 2,937,484 shares	0.01%	+96.15K(+3.40%)Added	SEC filing ↗ May 13, 2025	▾
09	RTW INVESTMENTS, LP CIK 1493215 · View history	$109.36M 2,721,158 shares	1.67%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2025	▾
10	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$108.63M 2,702,874 shares	0.01%	+2.48M(+1,133.50%)Added	SEC filing ↗ May 15, 2025	▾
11	Vestal Point Capital, LP CIK 1974915 · View history	$104.11M 2,590,531 shares	7.43%	+240.53K(+10.20%)Added	SEC filing ↗ May 15, 2025	▾
12	Polar Capital Holdings Plc CIK 1837309 · View history	$98.70M 2,455,737 shares	0.60%	+259.02K(+11.80%)Added	SEC filing ↗ May 15, 2025	▾
13	UBS Group AG CIK 1610520 · View history	$85.77M 2,134,219 shares	0.02%	+932.22K(+77.60%)Added	SEC filing ↗ May 13, 2025	▾
14	MARSHALL WACE, LLP CIK 1318757 · View history	$81.54M 2,028,792 shares	0.11%	-124.52K(-5.80%)Reduced	SEC filing ↗ May 15, 2025	▾
15	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$80.14M 1,993,896 shares	0.01%	-631.18K(-24.00%)Reduced	SEC filing ↗ May 14, 2025	▾
16	Pictet Asset Management Holding SA CIK 1993888 · View history	$78.91M 1,956,327 shares	0.09%	+44.33K(+2.30%)Added	SEC filing ↗ May 5, 2025	▾
17	Point72 Asset Management, L.P. CIK 1603466 · Amended · View history	$69.25M 1,722,984 shares	0.19%	+1.55M(+914.00%)Added	SEC filing ↗ Jul 21, 2025	▾
18	ALLIANCEBERNSTEIN L.P. CIK 1109448 · View history	$61.23M 1,523,440 shares	0.02%	-71.88K(-4.50%)Reduced	SEC filing ↗ May 15, 2025	▾
19	ORBIMED ADVISORS LLC CIK 1055951 · View history	$60.65M 1,509,205 shares	1.46%	-74.80K(-4.70%)Reduced	SEC filing ↗ May 15, 2025	▾
20	NORTHERN TRUST CORP CIK 73124 · View history	$58.17M 1,447,316 shares	0.01%	-24.17K(-1.60%)Reduced	SEC filing ↗ May 13, 2025	▾

Showing 20 / 358 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

358

Cancelled or null records excluded

Disclosed shares

136,629,479

Not deduplicated across managers

Disclosed value

$5.48B

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 2025

Explore all 358 reporting institutions.

This page includes 20 of 358 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.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 358 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"23282W605","quarter":"2025Q1","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

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.