Atara Biotherapeutics, Inc. (ATRA)
Latest ATRA Insider Trades
About Atara Biotherapeutics, Inc. (ATRA)
Atara Biotherapeutics Inc operates in the United States healthcare sector. It focuses on developing transformative therapies for patients with serious diseases, including solid tumors, hematologic cancers, and autoimmune diseases. It operates and manages business as one operating and reportable segment which is the business of developing therapeutics. The company's product candidates comprise Tab-cel, ATA3431, and ATA3219.
- THOUSAND OAKS, CA
- 10
- 2014
- XNAS
90-Day SEC Filing Activity
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 1 | 5,062 | $41K |
| Grant or award | 4 | 60,000 | |
| Option exercise | 4 | 390,422 |
ATRA Insider Transactions (Form 4)
4827 Form 4 filings on record, the earliest from Nov 20, 2024, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Anhco Nguyen - Officer | Open-market sale | Common Stock | 5,062 |
Recent ATRA Form 8-K Filings
5Recent ATRA Form 144 Notices of Proposed Sale
3A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Nguyen AnhCo | Director, Officer | 5,062 | $42K | View on EDGAR | |
| - | - |
ATRA Insider Trading - FAQ
What is the latest insider trade for ATRA?
Atara Biotherapeutics, Inc. (ATRA) had 6 insider filings in the last 90 days, with the most recent on 2026-08-26. The full record for ATRA runs to 27 Form 4 filings, the earliest from 2024-11-20. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
How many insiders are buying ATRA stock?
No insider purchases of ATRA were filed in the last 90 days. 3 purchases are on record for this company.
How many insiders are selling ATRA stock?
1 insider sale of ATRA was filed in the last 90 days, totaling $41K.
Where can I see ATRA SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page tracks ATRA Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
How can I follow ATRA insider buys?
Create a free InsiderAlpha account and press Watch on this page to add ATRA to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
More Health Care Companies with Insider Activity
Recent Insider Filings
10Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
- - Anhco Nguyen view on EDGAR
- - Redmile Group, LLC view on EDGAR
- - Brian N. Cherry view on EDGAR
- - William K. Heiden view on EDGAR
- - Matthew K. Fust view on EDGAR
- - Gregory Austin Ciongoli view on EDGAR
- - Anhco Nguyen view on EDGAR
- - Yanina Grant-Huerta view on EDGAR
- - Panacea Innovation Ltd view on EDGAR
Related Companies - Recent Insider Activity
Learn More
- What is SEC Form 4?
- The filing insiders must submit within two business days of a trade, and how to read its transaction codes.
- Insider activity in Health Care
- Where ATRA's peers are being bought and sold.
- Every recent Form 4
- The full market-wide feed, updated as filings arrive from SEC EDGAR.
Track ATRA insider activity as it files
Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
