Skip to main content

Atara Biotherapeutics, Inc.

ATRA
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001604464

In the last 90 days, Atara Biotherapeutics, Inc. insiders filed 1 open-market purchase and 1 sale; 36 institutions reported holding it in 13F filings for Q2 2026, worth $51.3M in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Atara Biotherapeutics, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
1 filing
1 insider, $1.00M in total
Open-market sells
1 filing
1 insider, $40.9K in total
Insiders trading
2
Net value
+$959.1K
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Atara Biotherapeutics, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Atara Biotherapeutics, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Cherry Brian NDirector166,486Sep 4, 20262
Nguyen AnhCoPresident and CEO132,775Aug 26, 20265
Redmile Group, LLCDirector636,852IndirectJul 24, 20261
Green JeremyDirector636,852IndirectJul 24, 20261
Heiden William KDirector34,188Jun 11, 20261
Fust Matthew KDirector30,188Jun 11, 20261
Ciongoli Gregory AustinDirector, 10% Owner, Other: See Remarks12,000Jun 11, 20261
Grant-Huerta YaninaChief Accounting Officer49,636May 20, 20264
Huang JamesDirector, 10% Owner1,011,000IndirectMay 11, 20264
Panacea Innovation Ltd10% Owner1,011,000IndirectMay 11, 20264
EcoR1 Capital, LLC10% Owner1,552,000IndirectMay 11, 20261
Gallagher Carol GiltnerDirector33,012Jun 12, 20250
Touchon PascalDirector77,955Jun 12, 20250
Roncarolo Maria GraziaDirector17,368Jun 12, 20250
Mallik AmeetDirector16,928Jun 12, 20250
Adiumentum Capital Fund I LPDirector, 10% Owner, Other: See remarks1,209,395May 16, 20250
Adiumentum Capital Fund I GP LLCDirector, 10% Owner, Other: See remarks1,209,395May 16, 20250
Hyllengren Eric JOther: Former EVP, CFO & COO56,231Apr 2, 20250
Henrich JillEVP, Chief Regulatory Officer18,679Mar 5, 20250
Murugan AmarEVP, Chief Legal Officer26,827Aug 20, 20240
Joshi ManherEVP, Chief Medical Officer171,284Nov 20, 20230
Dobmeier EricDirector563,325Nov 14, 20230
Seidenberg Beth CDirector115,689Jun 2, 20230
Banard Charlene A.EVP, Chief Technical Officer276,010May 18, 20230
Dupont JakobEVP, Head of R&D290,794Mar 6, 20230
Koppikar UtpalChief Financial Officer181,978Mar 6, 20230
Renaud Ronald C JRDirector31,500Jun 27, 20220
Baynes Roy D.Director43,500Jun 27, 20220
Yarema KristinChief Commercial Officer171,415Mar 3, 20220
Newell JoeChief Operations Officer113,097Nov 18, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 19, 2021 (view filing)Aug 172 daysDupont JakobEVP, Head of R&DSSale−2.15K$12.53−$27.0K−2.3%92.8K after
Aug 19, 2021 (view filing)Aug 172 daysKoppikar UtpalChief Financial OfficerSSale−3.58K$12.53−$44.8K−2.2%161.4K after
Aug 19, 2021 (view filing)Aug 172 daysMurugan AmarSVP, GC & SecretarySSale−2.08K$12.53−$26.1K−2.3%89.7K after
Aug 19, 2021 (view filing)Aug 172 daysNewell JoeChief Operations OfficerSSale−2.43K$12.53−$30.4K−1.9%126.5K after
Aug 19, 2021 (view filing)Aug 172 daysTouchon PascalPresident and CEOSSale−8.22K$12.53−$103.0K−2.4%336.9K after
Aug 31, 2021 (view filing)Aug 301 dayNewell JoeChief Operations OfficerSSale−3.50K$15.00−$52.5K−2.8%123.0K after
Sep 17, 2021 (view filing)Sep 152 daysNewell JoeChief Operations OfficerSSale−3.12K$15.61−$48.6K−2.5%119.9K after
Sep 24, 2021 (view filing)Sep 222 daysNewell JoeChief Operations OfficerSSale−10.5K$17.00−$178.5K−8.1%119.9K after
Nov 4, 2021 (view filing)Nov 22 daysDupont JakobEVP, Head of R&DSSale−5.00K$16.41−$82.0K−5.1%92.8K after
Nov 5, 2021 (view filing)Nov 41 dayFust Matthew KDirectorSSale−13.4K$19.50−$260.4K−29.8%31.5K after
Nov 17, 2021 (view filing)Nov 152 daysNewell JoeChief Operations OfficerSSale−7.00K$17.71−$124.0K−5.7%116.4K after
Nov 18, 2021 (view filing)Nov 162 daysDupont JakobEVP, Head of R&DSSale−2.20K$17.12−$37.6K−2.4%90.6K after
Nov 18, 2021 (view filing)Nov 162 daysKoppikar UtpalChief Financial OfficerSSale−3.65K$17.12−$62.6K−2.3%157.7K after
Nov 18, 2021 (view filing)Nov 162 daysMurugan AmarSVP, GC & SecretarySSale−2.12K$17.12−$36.4K−2.4%87.5K after
Nov 18, 2021 (view filing)Nov 162 daysNewell JoeChief Operations OfficerSSale−3.33K$17.12−$57.0K−2.9%113.1K after
Nov 18, 2021 (view filing)Nov 162 daysTouchon PascalPresident and CEOSSale−8.40K$17.12−$143.8K−2.5%328.5K after
Dec 3, 2021 (view filing)Dec 12 daysDupont JakobEVP, Head of R&DSSale−5.00K$17.94−$89.7K−5.2%90.6K after
Jan 5, 2022 (view filing)Jan 32 daysDupont JakobEVP, Head of R&DSSale−5.00K$16.01−$80.0K−5.2%90.6K after
Feb 9, 2022 (view filing)Feb 72 daysKoppikar UtpalChief Financial OfficerSSale−2.50K$14.46−$36.1K−1.6%155.7K after
Feb 14, 2022 (view filing)Feb 104 daysDupont JakobEVP, Head of R&DSSale−5.00K$16.00−$80.0K−5.2%90.6K after
Mar 3, 2022 (view filing)Mar 12 daysMurugan AmarSVP, GC & SecretarySSale−2.58K$9.86−$25.4K−1.8%137.0K after2 lots
Mar 3, 2022 (view filing)Mar 12 daysTouchon PascalPresident and CEOSSale−8.83K$9.86−$87.0K−1.7%500.2K after
Mar 3, 2022 (view filing)Mar 12 daysDupont JakobEVP, Head of R&DSSale−2.22K$9.86−$21.9K−1.3%166.9K after
Mar 3, 2022 (view filing)Mar 12 daysKoppikar UtpalChief Financial OfficerSSale−3.76K$9.86−$37.1K−1.7%213.2K after2 lots
May 19, 2022 (view filing)May 172 daysTouchon PascalPresident and CEOSSale−13.9K$5.32−$74.0K−2.8%486.3K after
May 19, 2022 (view filing)May 172 daysDupont JakobEVP, Head of R&DSSale−3.87K$5.32−$20.6K−2.3%163.0K after
May 19, 2022 (view filing)May 172 daysKoppikar UtpalChief Financial OfficerSSale−5.58K$5.32−$29.7K−2.6%207.6K after2 lots
May 19, 2022 (view filing)May 172 daysMurugan AmarSVP, GC & SecretarySSale−3.22K$5.32−$17.1K−2.4%133.7K after2 lots
Jun 10, 2022 (view filing)Jun 82 daysKoppikar UtpalChief Financial OfficerSSale−5.85K$5.63−$33.0K−2.8%203.5K after
Jun 29, 2022 (view filing)Jun 272 daysTouchon PascalPresident and CEOSSale−14.2K$7.20−$102.4K−2.9%472.1K after
Aug 18, 2022 (view filing)Aug 162 daysKoppikar UtpalChief Financial OfficerSSale−5.94K$5.04−$29.9K−2.9%197.6K after
Aug 18, 2022 (view filing)Aug 162 daysMurugan AmarSVP, GC & SecretarySSale−3.43K$5.04−$17.3K−2.5%131.2K after2 lots
Aug 18, 2022 (view filing)Aug 162 daysDupont JakobEVP, Head of R&DSSale−4.12K$5.03−$20.7K−2.5%158.9K after
Aug 18, 2022 (view filing)Aug 162 daysTouchon PascalPresident and CEOSSale−14.8K$5.04−$74.6K−3.1%457.3K after
Nov 18, 2022 (view filing)Nov 162 daysKoppikar UtpalChief Financial OfficerSSale−6.25K$4.49−$28.1K−3.2%191.3K after2 lots
Nov 18, 2022 (view filing)Nov 162 daysMurugan AmarSVP, GC & SecretarySSale−3.61K$4.49−$16.2K−2.8%127.6K after
Nov 18, 2022 (view filing)Nov 162 daysTouchon PascalPresident and CEOSSale−15.6K$4.49−$70.0K−3.4%441.7K after
Nov 18, 2022 (view filing)Nov 162 daysDupont JakobEVP, Head of R&DSSale−4.34K$4.49−$19.5K−2.7%154.5K after2 lots
Feb 9, 2023 (view filing)Feb 72 daysKoppikar UtpalChief Financial OfficerSSale−2.48K$5.46−$13.6K−1.3%188.8K after
Mar 6, 2023 (view filing)Mar 24 daysDupont JakobEVP, Head of R&DSSale−5.07K$3.63−$18.4K−1.7%290.8K after
Mar 6, 2023 (view filing)Mar 24 daysKoppikar UtpalChief Financial OfficerSSale−6.87K$3.63−$24.9K−3.6%182.0K after
Mar 6, 2023 (view filing)Mar 24 daysMurugan AmarSVP, GC & SecretarySSale−4.22K$3.63−$15.3K−1.5%279.3K after
Mar 6, 2023 (view filing)Mar 24 daysTouchon PascalPresident and CEOSSale−15.7K$3.63−$56.9K−2.0%750.7K after
May 18, 2023 (view filing)May 162 daysHyllengren Eric JSVP, CFOSSale−7.92K$2.04−$16.2K−3.4%226.1K after2 lots
May 18, 2023 (view filing)May 162 daysTouchon PascalPresident and CEOSSale−29.8K$2.04−$60.7K−4.0%721.0K after
May 18, 2023 (view filing)May 162 daysMurugan AmarEVP, Chief Legal OfficerSSale−8.39K$2.04−$17.1K−3.0%270.9K after2 lots
May 18, 2023 (view filing)May 162 daysBanard Charlene A.EVP, Chief Technical OfficerSSale−19.0K$2.04−$38.8K−6.5%276.0K after
Jun 29, 2023 (view filing)Jun 272 daysTouchon PascalPresident and CEOSSale−14.3K$1.66−$23.7K−2.0%706.7K after
Aug 18, 2023 (view filing)Aug 162 daysHenrich JillEVP, Global Head RA & QualitySSale−3.35K$1.65−$5.52K−3.0%107.7K after2 lots
Aug 18, 2023 (view filing)Aug 162 daysJoshi ManherEVP, Chief Medical OfficerSSale−6.97K$1.65−$11.5K−3.7%183.6K after2 lots