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CIK 0001604464 · Non-accelerated filer<br>Smaller reporting company

Atara Biotherapeutics, Inc.

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Ticker
ATRA
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
460920988
Phone
805-623-4211
Business address
1280 RANCHO CONEJO BLVD, THOUSAND OAKS, CA, 91320
Open-market buys, last 90 days
$999,994
in 1 filing
Open-market sales, last 90 days
$40,883
in 1 filing

Net +$959,111. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. Cherry Brian N +$1000K Director 1 filing
  2. Nguyen AnhCo −$41K President and CEO sold 4% of stake

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2025-03-31 Hyllengren Eric J Former EVP, CFO & COO Returned to the company · Employee Stock Option (Right to Buy) −350 0
2025-03-31 Hyllengren Eric J Former EVP, CFO & COO Returned to the company · Employee Stock Option (Right to Buy) −262 0
2025-03-31 Hyllengren Eric J Former EVP, CFO & COO Returned to the company · Employee Stock Option (Right to Buy) −543 160
2025-03-31 Hyllengren Eric J Former EVP, CFO & COO Returned to the company · Employee Stock Option (Right to Buy) −331 0
2025-03-31 Hyllengren Eric J Former EVP, CFO & COO Returned to the company · Employee Stock Option (Right to Buy) −8,961 2,656
2025-03-03 Nguyen AnhCo President and CEO Sale −3,331 $7.00 $23K 74,123
2025-03-03 Hyllengren Eric J EVP, CFO and COO Sale −1,211 $7.00 $8K 56,231
2025-03-03 Henrich Jill EVP, Chief Regulatory Officer Sale −1,059 $7.00 $7K 18,679
2025-01-27 Hyllengren Eric J EVP, CFO and COO Grant or award +34,050 57,442
2024-11-18 Henrich Jill EVP, Chief Regulatory Officer Sale −1,000 $11.20 $11K 19,378
2024-11-18 Hyllengren Eric J EVP, CFO and COO Sale −1,364 $11.20 $15K 23,392
2024-11-18 Nguyen AnhCo President and CEO Sale −1,664 $11.20 $19K 77,454
2024-09-09 Nguyen AnhCo President and CEO Grant or award +45,000 79,118
2024-08-16 Touchon Pascal President and CEO Sale −2,762 $6.63 $18K 70,403
2024-08-16 Touchon Pascal President and CEO Sale −276 $6.63 $2K 70,127
2024-08-16 Nguyen AnhCo EVP, Chief Sci. & Tech Officer Sale −1,468 $6.63 $10K 34,471
2024-08-16 Nguyen AnhCo EVP, Chief Sci. & Tech Officer Sale −297 $6.63 $2K 34,174
2024-08-16 Nguyen AnhCo EVP, Chief Sci. & Tech Officer Sale −56 $6.63 $371 34,118
2024-08-16 Murugan Amar EVP, Chief Legal Officer Sale −877 $6.63 $6K 27,108
2024-08-16 Murugan Amar EVP, Chief Legal Officer Sale −192 $6.63 $1K 26,916

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