Atara Biotherapeutics, Inc. ATRA

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8.20 USD -0.28 (-3.30%)

At closeNov 3, 2026, 4:32 PM EST

8.20 0.00 0.00%

After hours · Nov 3, 4:32 PM ET

8.17 Day range 8.62

3.92 52-week range 19.15

Held by insiders 22.15%

Held by institutions 50.82%

Float held by institutions 65.29%

Institutions 67

Top institutional holders
Holder	% held	Shares	Value	Reported
EcoR1 Capital, LLC	8.14%	468,938	6.25M	Sep 29, 2024
Redmile Group, LLC	7.85%	452,270	6.03M	Sep 29, 2024
Citadel Advisors Llc	4.52%	260,480	3.47M	Sep 29, 2024
Bank of America Corporation	3.54%	203,627	2.71M	Sep 29, 2024
Vanguard Group Inc	3.14%	180,715	2.41M	Sep 29, 2024
Millennium Management Llc	3.06%	176,053	2.35M	Sep 29, 2024

Top mutual fund holders
Holder	% held	Shares	Value	Reported
Vanguard Total Stock Market Index Fund	2.09%	120,258	1.60M	Sep 29, 2024
Vanguard Extended Market Index Fund	0.95%	54,473	726.13K	Sep 29, 2024
Fidelity Extended Market Index Fund	0.44%	25,277	336.94K	Oct 30, 2024
Schwab Strategic Tr-Schwab U.S. Small Cap ETF	0.43%	24,599	327.90K	Aug 30, 2024
Bridgeway Funds Inc-Ultra Small Company Market Fund	0.24%	14,000	186.62K	Sep 29, 2024
Variable Insurance Products Fd II-Disciplined Small Cap Portfolio	0.17%	9,631	128.38K	Sep 29, 2024

ATRA insiders
Insider	Relation	Latest transaction	Date	Shares held
FUST MATTHEW K.	Director	Stock Award(Grant)	Mar 27, 2024	259,000
GALLAGHER CAROL GILTNER	Director	Stock Award(Grant)	Mar 27, 2024	629,608
HEIDEN WILLIAM K	Director	Stock Award(Grant)	Mar 27, 2024	359,000
HENRICH JILL	Officer	Sale	Nov 17, 2024	19,378
HYLLENGREN ERIC J	Chief Operating Officer	Sale	Nov 17, 2024	23,392
MALLIK AMEET	Director	Stock Award(Grant)	Mar 27, 2024	227,500

Held by funds