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.

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	MACKENZIE FINANCIAL CORP CIK 919859 · View history	$1.50M 176,758 shares	0.00%	-56.49K(-24.20%)Reduced	SEC filing ↗ Nov 2, 2026	▾
02	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$688.42K 80,950 shares	0.00%	+5.82K(+7.70%)Added	SEC filing ↗ Nov 6, 2026	▾
03	STALEY CAPITAL ADVISERS INC CIK 1106565 · View history	$425.00K 50,000 shares	0.02%	0(0.00%)Unchanged	SEC filing ↗ Nov 6, 2026	▾
04	STATE STREET CORP CIK 93751 · View history	$224.85K 26,453 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Nov 12, 2026	▾
05	UBS Group AG CIK 1610520 · View history	$176.43K 20,756 shares	0.00%	+16.78K(+421.60%)Added	SEC filing ↗ Nov 10, 2026	▾
06	FMR LLC CIK 315066 · View history	$138.36K 16,278 shares	0.00%	+40(+0.20%)Added	SEC filing ↗ Nov 10, 2026	▾
07	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$98.00K 11,538 shares	0.00%	-27.31K(-70.30%)Reduced	SEC filing ↗ Nov 9, 2026	▾
08	Employees Retirement System of Texas CIK 1398739 · View history	$44.00K 5,154 shares	0.00%	+5.15KNew	SEC filing ↗ Nov 10, 2026	▾
09	SBI Securities Co., Ltd. CIK 1851815 · View history	$11.93K 1,404 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Oct 22, 2026	▾
10	Caitong International Asset Management Co., Ltd CIK 1963355 · View history	$2.26K 266 shares	0.00%	-45(-14.50%)Reduced	SEC filing ↗ Oct 29, 2026	▾
11	BARCLAYS PLC CIK 312069 · View history	$1.82K 214 shares	0.00%	-90(-29.60%)Reduced	SEC filing ↗ Nov 6, 2026	▾
12	JPMORGAN CHASE & CO CIK 19617 · View history	$1.79K 222 shares	0.00%	+6(+2.80%)Added	SEC filing ↗ Nov 12, 2026	▾
13	BNP PARIBAS FINANCIAL MARKETS CIK 1166588 · View history	$391.00 46 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Nov 12, 2026	▾
14	OSAIC HOLDINGS, INC. CIK 1677044 · View history	$80.00 10 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Nov 12, 2026	▾
15	CITIGROUP INC CIK 831001 · View history	$9.00 1 shares	0.00%	-96(-99.00%)Reduced	SEC filing ↗ Nov 4, 2026	▾
16	IFP Advisors, Inc CIK 1641866 · View history	$8.00 1 shares	0.00%	+1New	SEC filing ↗ Oct 16, 2026	▾

Showing 16 / 16 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

390,051

Not deduplicated across managers

Disclosed value

$3.32M

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 2026

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This page includes 16 of 16 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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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.