ATARA BIOTHERAPEUTICS INC

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ATRA·046513206·US·Common Stock·Healthcare - Biotechnology-Activist

ATRA (ATARA BIOTHERAPEUTICS INC) is held by 26 institutional investors as of Q2 2026. Largest holders: ADAGE CAPITAL PARTNERS GP, L.L.C. ($9.8M), Point72 Asset Management, L.P. ($7.9M), VANGUARD CAPITAL MANAGEMENT LLC ($2.8M). Net institutional sentiment: Bullish.

26

Holders

$27.2M

Total Value

70% (20)

Consensus

14 buying - 6 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)42

Insider (Form 4)51

Activist (13D/13G)27

Congressional (STOCK Act)31

Holder Quality

87

★★★★★

Elite

23

★★★★

Strong

15

★★★

Solid

53

★★

Below

56

★

Weak

Held by 26 funds

Who's Trading

Source dates: Price Aug 28, 2026 · Insiders Aug 26, 2026 · Activists Aug 14, 2026 · Congress none

InsiderNANguyen AnhCoSell $41KAug 17, 2026

ActivistPoint72 Asset Management, L.P.7.6%Aug 14, 2026

ActivistRERedmile Group, LLC9.9%Jul 24, 2026

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Top Holders

Top Holders (26)History

AllNewIncreasedHeldDecreasedExited

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
AGADAGE CAPITAL PARTNERS GP, L.L.C.	Increased	850,000(+21.4%)	$9.8M	0.0%	+44.54%	33
Point72 Asset Management, L.P.	Increased	687,718(+254.0%)	$7.9M	0.0%	-7.13%	44
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	247,047(+13.4%)	$2.8M	0.0%	+52.87%	30
MACKENZIE FINANCIAL CORP	Decreased	233,249(-25.6%)	$2.7M	0.0%	+42.05%	0
BlackRock, Inc.	Increased	84,455(+6.9%)	$969,544	0.0%	-18.12%	18
GEODE CAPITAL MANAGEMENT, LLC	Increased	75,128(+13.6%)	$862,924	0.0%	-95.74%	19
VFVANGUARD FIDUCIARY TRUST CO	Increased	43,036(+28.0%)	$494,053	0.0%	+39.05%	30
JANE STREET GROUP, LLC	Decreased	30,345(-10.4%)	$348,360	0.0%	+5.57%	0
STATE STREET CORP	Unchanged	26,453	$303,680	0.0%	-19.97%	0
NORTHERN TRUST CORP	Increased	16,591(+34.5%)	$190,465	0.0%	-28.84%	20
FMR LLC	Unchanged	16,238	$186,412	0.0%	-29.37%	0
XTX Topco Ltd	New	15,303	$175,678	0.0%	-18.29%	31
MILLENNIUM MANAGEMENT LLC	Decreased	12,680(-73.4%)	$145,566	0.0%	+73.06%	0
CITADEL ADVISORS LLC	New	10,159	$116,625	0.0%	-18.29%	34
MORGAN STANLEY	Increased	9,178(+0.1%)	$105,368	0.0%	-23.12%	15
ROYAL BANK OF CANADA	Increased	4,743(+9.8%)	$55,000	0.0%	+47.10%	15
UBS Group AG	Decreased	3,979(-92.0%)	$45,679	0.0%	+68.74%	0
VGVanguard Global Advisers, LLC	Unchanged	1,456	$16,715	0.0%	+73.06%	0
JONES FINANCIAL COMPANIES LLLP	Increased	803(+14.2%)	$8,440	0.0%	+5.95%	13
BARCLAYS PLC	New	304	$3,490	0.0%	-18.29%	21

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ATRAATARA BIOTHERAPEUTICS INC

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer