ETNBUnknownSmall-Cap
89bio, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for 89bio, Inc. (ETNB), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud Research Team · SEC Form 4 & insider trading data analysts
Last updated:
Quick Answer
Are ETNB insiders buying or selling?
89bio, Inc. insiders reported 25 open-market buys ($259.0M) and 38 sells ($21.6M) across 63 Form 4 filings — a net buying position of $237.4M.
Source: SEC EDGAR Form 4
Key Statistics (as of Jul 17, 2025)
Total Form 4 filings
63
SEC EDGAR
Insider filers
13
Insider buys (25)
$259.0M
Insider sells (38)
$21.6M
Insider sentiment
Net buyingNet insider flow of $237.4M in net buying.
Recent ETNB insider transactions
| Date | Insider | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jul 17, 2025 | Quoc Le-Nguyen | Chief Technical Operations Officer | Sale | 10.5K | $11.02 | $115.3K |
| Apr 17, 2025 | Quoc Le-Nguyen | Chief Technical Operations Officer | Sale | 15.3K | $5.95 | $91.2K |
| Feb 3, 2025 | Peter Kolchinsky | Director, 10% Owner | Purchase | 5.7M | $8.75 | $50.0M |
| Jan 24, 2025 | Charles Mcwherter | Director | Purchase | 15.0K | $6.66 | $99.8K |
| Jan 17, 2025 | Quoc Le-Nguyen | Chief Technical Operations Officer | Sale | 11.0K | $6.49 | $71.1K |
| Dec 10, 2024 | Rohan Palekar | Chief Executive Officer | Purchase | 5.0K | $7.89 | $39.5K |
| Dec 9, 2024 | Charles Mcwherter | Director | Purchase | 10.0K | $8.00 | $80.0K |
| Nov 25, 2024 | Rohan Palekar | Chief Executive Officer | Purchase | 10.0K | $8.35 | $83.5K |
| Nov 1, 2024 | Quoc Le-Nguyen | Chief Technical Operations Officer | Sale | 28.0K | $8.12 | $227.0K |
| Apr 3, 2024 | Rohan Palekar | Chief Executive Officer | Sale | 52.7K | $10.91 | $575.2K |
| Mar 6, 2024 | Peter Kolchinsky | Director, 10% Owner | Purchase | 1.4M | $15.35 | $20.7M |
| Feb 28, 2024 | Rohan Palekar | Chief Executive Officer | Sale | 4.5K | $10.76 | $48.2K |
| Jan 3, 2024 | Rohan Palekar | Chief Executive Officer | Sale | 50.0K | $11.20 | $560.0K |
| Jul 18, 2023 | Kathleen Laporte | Director | Sale | 12.5K | $18.80 | $235.0K |
| Jun 7, 2023 | Rohan Palekar | Chief Executive Officer | Sale | 15.0K | $20.00 | $300.0K |
| May 11, 2023 | Quoc Le-Nguyen | Chief Technical Operations Officer and Head of Quality | Sale | 13.7K | $18.11 | $247.8K |
| Apr 6, 2023 | Ryan Martins | Chief Financial Officer | Sale | 8.7K | $14.95 | $130.4K |
| Mar 30, 2023 | Peter Kolchinsky | Director, 10% Owner | Purchase | 2.5M | $16.25 | $40.0M |
| Mar 30, 2023 | Michael R Hayden | Director | Purchase | 87.8K | $12.28 | $1.1M |
| Mar 27, 2023 | Ryan Martins | Chief Financial Officer | Sale | 5.0K | $16.11 | $80.5K |
| Mar 27, 2023 | Rohan Palekar | Chief Executive Officer | Sale | 15.0K | $16.00 | $240.0K |
| Feb 22, 2023 | Ryan Martins | Chief Financial Officer | Sale | 2.5K | $13.89 | $35.3K |
| Feb 10, 2023 | Ryan Martins | Chief Financial Officer | Sale | 1.5K | $14.41 | $21.3K |
| Feb 8, 2023 | Ryan Martins | Chief Financial Officer | Sale | 3.6K | $13.04 | $46.8K |
| Jan 5, 2023 | Ryan Martins | Chief Financial Officer | Sale | 5.9K | $12.51 | $74.4K |
Showing the 25 most recent of 63 Form 4 filings for 89bio, Inc..
Most active ETNB insiders
- Ram Waisbourd15 filings
- Peter Kolchinsky10 filings
- Rohan Palekar9 filings
- Ryan Martins7 filings
- Quoc Le-Nguyen6 filings
Ask anything about ETNB insider activity
Use Trabud's AI agent to query 89bio, Inc.'s Form 4 history in plain English — "Show me ETNB CEO purchases this year" or compare it against any other ticker.
Open the AI agentETNB insider trading FAQ
Are 89bio, Inc. insiders buying or selling?
Across 63 SEC Form 4 filings, 89bio, Inc. (ETNB) insiders reported 25 open-market purchases totaling $259.0M and 38 sales totaling $21.6M. That is a net buying position of $237.4M.
How many insiders trade ETNB stock?
13 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for 89bio, Inc.. The most recent filing was accepted on Jul 17, 2025.
Where does Trabud get ETNB insider trading data?
All ETNB insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.
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