CIK 0001604464 · Non-accelerated filer<br>Smaller reporting company
Atara Biotherapeutics, Inc.
Sign in to watch- 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.
Who's trading
90 days
Reading 100 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-09-04 | Cherry Brian N Director | Purchase | +104,166 | $9.60 | $1000K | 166,486 |
| 2026-08-17 | Nguyen AnhCo President and CEO | Sale | −5,062 | $8.08 | $41K | 132,775 |
| 2026-07-22 | Redmile Group, LLC Director | Option exercise | +195,211 | 636,912 | ||
| 2026-07-22 | Redmile Group, LLC Director | Shares withheld for taxes | −60 | 636,852 | ||
| 2026-07-22 | Redmile Group, LLC Director | Option exercise · Pre-Funded Warrants to Purchase Common Stock | −101,089 | 0 | ||
| 2026-07-22 | Redmile Group, LLC Director | Option exercise · Pre-Funded Warrants to Purchase Common Stock | −38,735 | 0 | ||
| 2026-07-22 | Redmile Group, LLC Director | Option exercise · Pre-Funded Warrants to Purchase Common Stock | −55,387 | 0 | ||
| 2026-06-11 | Cherry Brian N Director | Grant or award | +24,000 | 62,320 | ||
| 2026-06-09 | HEIDEN WILLIAM K Director | Grant or award | +12,000 | 34,188 | ||
| 2026-06-09 | Fust Matthew K Director | Grant or award | +12,000 | 30,188 | ||
| 2026-06-09 | Ciongoli Gregory Austin Director | Grant or award | +12,000 | 12,000 | ||
| 2026-05-18 | Nguyen AnhCo President and CEO | Sale | −5,241 | $9.13 | $48K | 137,837 |
| 2026-05-18 | Grant-Huerta Yanina Chief Accounting Officer | Sale | −2,414 | $9.13 | $22K | 49,636 |
| 2026-05-07 | Panacea Innovation Ltd 10% owner | Sale | −313,446 | $10.10 | $3.2M | 1,011,000 |
| 2026-05-07 | EcoR1 Capital, LLC 10% owner | Purchase | +507,407 | $9.35 | $4.7M | 1,552,000 |
| 2026-03-17 | Panacea Innovation Ltd 10% owner | Option exercise | +259,163 | $0.00 | $26 | 307,899 |
| 2026-03-17 | Panacea Innovation Ltd 10% owner | Shares withheld for taxes | −5 | $5.23 | $26 | 307,894 |
| 2026-03-17 | Panacea Innovation Ltd 10% owner | Option exercise · Warrants | −259,163 | $6.61 | $1.7M | 0 |
| 2026-03-09 | Nguyen AnhCo President and CEO | Grant or award | +81,100 | 143,078 | ||
| 2026-03-09 | Grant-Huerta Yanina Chief Accounting Officer | Grant or award | +20,300 | 52,050 |
Page 1 of 17 · 334 trades