Stocks · Health care · Biological Products, (No Diagnostic Substances)

Atara Biotherapeutics, Inc.

ATRA Clue Score62

United States Fiscal year ends December CIK 0001604464 Results filed 12 Aug 2026

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What the insiders did Net selling

By person

37 insiders · 531 transactions

Insider

Role

Bought

Sold

Net

Holding

Of company

Worth

Change

Isaac E. Ciechanover

Chief Executive Officer

—

$20.36M (217)

−$20.36M

622,930

6.21%

$5.98M

−44.7%

Mitchall G. Clark

EVP & Chief R & QA Officer

—

$6.46M (15) scheduled

−$6.46M

107,972

1.08%

$1.04M

+15.2%

Christopher Haqq

EVP, R&D & Chief Scientific Of

—

$6.33M (31)

−$6.33M

274,631

2.74%

$2.64M

−29.0%

EcoR1 Capital, LLC entity

10% owner

$4.74M (1)

—

+$4.74M

1,552,000

15.46%

$14.90M

+48.6%

John McGrath

EVP & Chief Financial Officer

—

$3.52M (19)

−$3.52M

88,762

0.8843%

$852.12K

−5.9%

Joel S Marcus

Director

—

$3.39M (3)

−$3.39M

899,855

8.96%

$8.64M

−2.3%

Panacea Innovation Ltd entity

10% owner

$856.79K (2)

$3.65M (2)

−$2.80M

1,011,000

10.07%

$9.71M

−1.2%

Joe Newell

Chief Operations Officer

—

$2.42M (46) scheduled

−$2.42M

113,097

1.13%

$1.09M

+223.1%

Pascal Touchon

Director

—

$1.72M (24)

−$1.72M

77,955

0.7766%

$748.37K

—

Gad Soffer

EVP & Chief Strategy Officer

—

$1.17M (13)

−$1.17M

243,966

2.43%

$2.34M

+3.7%

Derrell Porter

SVP, Head of Global Commercial

—

$1.03M (3) scheduled

−$1.03M

31,688

0.3157%

$304.20K

+21.1%

Brian N Cherry

Director

$999.99K (1)

—

+$999.99K

166,486

1.66%

$1.60M

+334.5%

Carol Giltner Gallagher

Director

$68.21K (2)

$1.06M (11)

−$995.81K

33,012

0.3289%

$316.92K

—

Matthew K Fust

Director

—

$795.70K (2)

−$795.70K

30,188

0.3007%

$289.80K

—

Heather D Turner

Former EVP, GC & Sec.

—

$656.28K (8)

−$656.28K

69,494

0.6923%

$667.14K

+42.2%

Utpal Koppikar

Chief Financial Officer

$73.60K (1)

$705.32K (24)

−$631.72K

181,978

1.81%

$1.75M

+2,370%

Jakob Dupont

EVP, Head of R&D

—

$572.97K (13) scheduled

−$572.97K

290,794

2.90%

$2.79M

—

Kristin Yarema

Chief Commercial Officer

$500.37K (3)

$11.07K (1)

+$489.30K

171,415

1.71%

$1.65M

+7,458%

AnhCo Nguyen

President and CEO

—

$315.58K (22)

−$315.58K

132,775

1.32%

$1.27M

—

Amar Murugan

EVP, Chief Legal Officer

—

$305.96K (21)

−$305.96K

26,827

0.2673%

$257.54K

—

Eric Dobmeier

Director

$140.34K (2)

—

+$140.34K

563,325

5.61%

$5.41M

+10,142%

Yanina Grant-Huerta

Chief Accounting Officer

—

$92.53K (12)

−$92.53K

49,636

0.4945%

$476.51K

+25.1%

Eric J Hyllengren

Former EVP, CFO & COO

—

$87.64K (12)

−$87.64K

56,231

0.5602%

$539.82K

—

Jill Henrich

EVP, Chief Regulatory Officer

—

$50.47K (9)

−$50.47K

18,679

0.1861%

$179.32K

—

Charlene A. Banard

EVP, Chief Technical Officer

—

$38.78K (1)

−$38.78K

276,010

2.75%

$2.65M

+77.7%

William K Heiden

Director

$25.33K (1)

—

+$25.33K

34,188

0.3406%

$328.20K

—

Manher Joshi

EVP, Chief Medical Officer

—

$16.31K (3)

−$16.31K

171,284

1.71%

$1.64M

−10.1%

Adiumentum Capital Fund I LP entity

Director

—

—

—

1,209,395

12.05%

$11.61M

+6.7%

Redmile Group, LLC entity

Director

—

—

—

636,852

6.34%

$6.11M

+44.2%

Beth C Seidenberg

Director

—

—

—

115,886

1.15%

$1.11M

+1,583%

Dietmar Berger

Global Head of R&D

—

—

—

85,678

0.8536%

$822.51K

—

Mina Kim

Senior VP & General Counsel

—

—

—

66,389

0.6614%

$637.33K

+13,178%

Roy D. Baynes

Director

—

—

—

43,500

0.4334%

$417.60K

—

Ronald C Renaud JR

Director

—

—

—

31,500

0.3138%

$302.40K

—

Maria Grazia Roncarolo

Director

—

—

—

17,368

0.1730%

$166.73K

—

Ameet Mallik

Director

—

—

—

16,928

0.1686%

$162.51K

—

Gregory Austin Ciongoli

Director

—

—

—

12,000

0.1195%

$115.20K

—