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Insider trades
Open-market buys and sells by officers, directors and 10% owners, from SEC Form 4. Usually filed within two business days.
About this data
- What it is
- When a company's officers, directors or owners of more than 10% buy or sell its stock, they must report the trade to the SEC on Form 4. This feed shows purchases and sales on the open market; stock grants, option exercises and shares withheld for tax are left out.
- Who files it
- The insider, usually through the company, within two business days of the trade.
- How current
- We collect new filings throughout the day on SEC business days.
- Worth knowing
- Sales are often routine: insiders sell to diversify, to pay taxes, or under a 10b5-1 plan set up months in advance. A purchase with their own money is less common, which is why many investors pay closer attention to it.
All of this comes from public filings.
Source and freshness · Information, not investment advice (disclaimer).
Open-market trades per day, last 30 days
Purchases Sales
By trade date. Insiders have two business days to file, so the most recent days fill in later.
Latest open-market insider trades
Showing: ticker ATRA
| Traded | Insider | Company | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sep 4, 2026 | Brian N. Cherry Director | ATRA Atara Biotherapeutics, Inc. | Buy | 104,166 | $9.60 | $1000.0K Buy | Form 4 ↗ |
| Aug 17, 2026 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 5,062 | $8.08 | $40.9K Sale | Form 4 ↗ |
| May 18, 2026 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 5,241 | $9.13 | $47.9K Sale | Form 4 ↗ |
| May 18, 2026 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 2,414 | $9.13 | $22.0K Sale | Form 4 ↗ |
| May 7, 2026 | Panacea Innovation Ltd 10% owner | ATRA Atara Biotherapeutics, Inc. | Sale | 313,446 | $10.10 | $3.2M Sale | Form 4 ↗ |
| May 7, 2026 | EcoR1 Capital, LLC 10% owner | ATRA Atara Biotherapeutics, Inc. | Buy | 507,407 | $9.35 | $4.7M Buy | Form 4 ↗ |
| Mar 2, 2026 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 100 | $5.08 | $508 Sale | Form 4 ↗ |
| Mar 2, 2026 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 377 | $5.08 | $1,915 Sale | Form 4 ↗ |
| Mar 2, 2026 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 1,603 | $5.08 | $8,143 Sale | Form 4 ↗ |
| Mar 2, 2026 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 24 | $5.08 | $122 Sale | Form 4 ↗ |
| Mar 2, 2026 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 1,442 | $5.09 | $7,340 Sale | Form 4 ↗ |
| Mar 2, 2026 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 1,298 | $5.09 | $6,607 Sale | Form 4 ↗ |
| Mar 2, 2026 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 58 | $5.08 | $295 Sale | Form 4 ↗ |
| Mar 2, 2026 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 198 | $5.08 | $1,006 Sale | Form 4 ↗ |
| Jan 12, 2026 | James Huang Director, 10% owner | ATRA Atara Biotherapeutics, Inc. | Sale | 80,554 | $6.07 | $489.0K Sale | Form 4 ↗ |
| Nov 17, 2025 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 56 | $13.19 | $739 Sale | Form 4 ↗ |
| Nov 17, 2025 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 2,859 | $13.19 | $37.7K Sale | Form 4 ↗ |
| Nov 17, 2025 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 74 | $13.19 | $976 Sale | Form 4 ↗ |
| Nov 17, 2025 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 85 | $13.19 | $1,121 Sale | Form 4 ↗ |
| Nov 17, 2025 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 1,645 | $13.19 | $21.7K Sale | Form 4 ↗ |
| Aug 18, 2025 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 1,620 | $11.62 | $18.8K Sale | Form 4 ↗ |
| Aug 18, 2025 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 1,281 | $11.62 | $14.9K Sale | Form 4 ↗ |
| Aug 18, 2025 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 57 | $11.61 | $662 Sale | Form 4 ↗ |
| Aug 18, 2025 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 1,668 | $11.61 | $19.4K Sale | Form 4 ↗ |
| Aug 18, 2025 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 86 | $11.61 | $998 Sale | Form 4 ↗ |
| Aug 18, 2025 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 55 | $11.61 | $639 Sale | Form 4 ↗ |
| Aug 15, 2025 | Panacea Innovation Ltd 10% owner | ATRA Atara Biotherapeutics, Inc. | Buy | 55,000 | $12.19 | $670.5K Buy | Form 4 ↗ |
| Jul 17, 2025 | James Huang Director, 10% owner | ATRA Atara Biotherapeutics, Inc. | Buy | 19,335 | $9.64 | $186.4K Buy | Form 4 ↗ |
| May 16, 2025 | Grant-Huerta Yanina Chief Accounting Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 2,218 | $6.76 | $15.0K Sale | Form 4 ↗ |
| May 16, 2025 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 3,276 | $6.76 | $22.1K Sale | Form 4 ↗ |
| Mar 3, 2025 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 3,331 | $7.00 | $23.3K Sale | Form 4 ↗ |
| Mar 3, 2025 | Eric J. Hyllengren EVP, CFO and COO | ATRA Atara Biotherapeutics, Inc. | Sale | 1,211 | $7.00 | $8,477 Sale | Form 4 ↗ |
| Mar 3, 2025 | Jill Henrich EVP, Chief Regulatory Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 1,059 | $7.00 | $7,413 Sale | Form 4 ↗ |
| Nov 18, 2024 | Jill Henrich EVP, Chief Regulatory Officer | ATRA Atara Biotherapeutics, Inc. | Sale | 1,000 | $11.20 | $11.2K Sale | Form 4 ↗ |
| Nov 18, 2024 | Eric J. Hyllengren EVP, CFO and COO | ATRA Atara Biotherapeutics, Inc. | Sale | 1,364 | $11.20 | $15.3K Sale | Form 4 ↗ |
| Nov 18, 2024 | AnhCo Nguyen President and CEO, Director | ATRA Atara Biotherapeutics, Inc. | Sale | 1,664 | $11.20 | $18.6K Sale | Form 4 ↗ |
36 items, most recent first (up to 50). Every row links to its original filing. Updated Nov 15, 2026, 5:58 PM EST.
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