Company · Ownership research

Atara Biotherapeutics, Inc. ATRA

CIK 0001604464 · CUSIP 046513206

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 046513206 (ATRA), not CUSIP 046513107 (ATRA), and does not merge CUSIPs.

This page lists the top 20 of 35 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	EcoR1 Capital, LLC CIK 1587114 · View history	$3.81M 468,938 shares	0.13%	+62.26K(+15.30%)Added	SEC filing ↗ Nov 14, 2024	▾
02	Redmile Group, LLC CIK 1425738 · View history	$3.68M 452,270 shares	0.22%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
03	CITADEL ADVISORS LLC CIK 1423053 · View history	$2.12M 260,480 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
04	BANK OF AMERICA CORP /DE/ CIK 70858 · Amended · View history	$1.66M 203,627 shares	0.00%	+17.62K(+9.50%)Added	SEC filing ↗ Nov 14, 2024	▾
05	VANGUARD GROUP INC CIK 102909 · View history	$1.47M 180,715 shares	0.00%	+11.38K(+6.70%)Added	SEC filing ↗ Nov 13, 2024	▾
06	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$1.43M 176,053 shares	0.00%	+59.38K(+50.90%)Added	SEC filing ↗ Nov 14, 2024	▾
07	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$1.05M 129,144 shares	0.00%	+9.77K(+8.20%)Added	SEC filing ↗ Nov 12, 2024	▾
08	Vestal Point Capital, LP CIK 1974915 · View history	$1.01M 124,677 shares	0.08%	+12.68K(+11.30%)Added	SEC filing ↗ Nov 14, 2024	▾
09	TANG CAPITAL MANAGEMENT LLC CIK 1232621 · View history	$611.34K 75,196 shares	0.04%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
10	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$550.68K 67,734 shares	0.00%	+21.67K(+47.00%)Added	SEC filing ↗ Nov 13, 2024	▾
11	BlackRock, Inc. CIK 2012383 · View history	$495.56K 60,954 shares	0.00%	—	SEC filing ↗ Nov 13, 2024	▾
12	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$379.92K 46,720 shares	0.00%	+4.04K(+9.50%)Added	SEC filing ↗ Nov 12, 2024	▾
13	Centiva Capital, LP CIK 1692507 · View history	$352.87K 43,403 shares	0.02%	-96.85K(-69.10%)Reduced	SEC filing ↗ Nov 14, 2024	▾
14	STALEY CAPITAL ADVISERS INC CIK 1106565 · View history	$325.20K 40,000 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Nov 8, 2024	▾
15	FMR LLC CIK 315066 · Amended · View history	$203.75K 25,061 shares	0.00%	+7.38K(+41.70%)Added	SEC filing ↗ Nov 13, 2024	▾
16	STATE STREET CORP CIK 93751 · View history	$181.73K 22,353 shares	0.00%	+7.68K(+52.30%)Added	SEC filing ↗ Nov 14, 2024	▾
17	MORGAN STANLEY CIK 895421 · Amended · View history	$131.62K 16,189 shares	0.00%	+6.40K(+65.40%)Added	SEC filing ↗ May 14, 2025	▾
18	BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history	$113.82K 14,000 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
19	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$11.14K 1,370 shares	0.00%	-290(-17.50%)Reduced	SEC filing ↗ Dec 26, 2024	▾
20	WELLS FARGO & COMPANY/MN CIK 72971 · View history	$10.17K 1,251 shares	0.00%	+936(+297.10%)Added	SEC filing ↗ Nov 13, 2024	▾

Showing 20 / 35 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

2,414,517

Not deduplicated across managers

Disclosed value

$19.63M

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.

Atara Biotherapeutics, Inc. · Q3 2024

Explore all 35 reporting institutions.

This page includes 20 of 35 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.