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 · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are ETNB insiders buying or selling?
89bio, Inc. insiders reported no open-market purchases or sales in the last 12 months. Since November 2019, Trabud has recorded 63 Form 4 filings for ETNB: 25 buys ($259.0M) and 38 sells ($21.6M).
Source: SEC EDGAR Form 4
Key Statistics (November 2019 – 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 since November 2019.
Recent ETNB insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Jul 17, 2025 | Quoc Le-Nguyen | Chief Technical Operations Officer | Sale | 10.5K | $11.02 | $115.3K | SEC ↗ |
| Apr 17, 2025 | Quoc Le-Nguyen | Chief Technical Operations Officer | Sale | 15.3K | $5.95 | $91.2K | SEC ↗ |
| Feb 3, 2025 | Peter Kolchinsky | Director, 10% Owner | Purchase | 5.7M | $8.75 | $50.0M | SEC ↗ |
| Jan 24, 2025 | Charles Mcwherter | Director | Purchase | 15.0K | $6.66 | $99.8K | SEC ↗ |
| Jan 17, 2025 | Quoc Le-Nguyen | Chief Technical Operations Officer | Sale | 11.0K | $6.49 | $71.1K | SEC ↗ |
| Dec 10, 2024 | Rohan Palekar | Chief Executive Officer | Purchase | 5.0K | $7.89 | $39.5K | SEC ↗ |
| Dec 9, 2024 | Charles Mcwherter | Director | Purchase | 10.0K | $8.00 | $80.0K | SEC ↗ |
| Nov 25, 2024 | Rohan Palekar | Chief Executive Officer | Purchase | 10.0K | $8.35 | $83.5K | SEC ↗ |
| Nov 1, 2024 | Quoc Le-Nguyen | Chief Technical Operations Officer | Sale | 28.0K | $8.12 | $227.0K | SEC ↗ |
| Apr 3, 2024 | Rohan Palekar | Chief Executive Officer | Sale | 52.7K | $10.91 | $575.2K | SEC ↗ |
| Mar 6, 2024 | Peter Kolchinsky | Director, 10% Owner | Purchase | 1.4M | $15.35 | $20.7M | SEC ↗ |
| Feb 28, 2024 | Rohan Palekar | Chief Executive Officer | Sale | 4.5K | $10.76 | $48.2K | SEC ↗ |
| Jan 3, 2024 | Rohan Palekar | Chief Executive Officer | Sale | 50.0K | $11.20 | $560.0K | SEC ↗ |
| Jul 18, 2023 | Kathleen Laporte | Director | Sale | 12.5K | $18.80 | $235.0K | SEC ↗ |
| Jun 7, 2023 | Rohan Palekar | Chief Executive Officer | Sale | 15.0K | $20.00 | $300.0K | SEC ↗ |
| May 11, 2023 | Quoc Le-Nguyen | Chief Technical Operations Officer and Head of Quality | Sale | 13.7K | $18.11 | $247.8K | SEC ↗ |
| Apr 6, 2023 | Ryan Martins | Chief Financial Officer | Sale | 8.7K | $14.95 | $130.4K | SEC ↗ |
| Mar 30, 2023 | Peter Kolchinsky | Director, 10% Owner | Purchase | 2.5M | $16.25 | $40.0M | SEC ↗ |
| Mar 30, 2023 | Michael R Hayden | Director | Purchase | 87.8K | $12.28 | $1.1M | SEC ↗ |
| Mar 27, 2023 | Ryan Martins | Chief Financial Officer | Sale | 5.0K | $16.11 | $80.5K | SEC ↗ |
| Mar 27, 2023 | Rohan Palekar | Chief Executive Officer | Sale | 15.0K | $16.00 | $240.0K | SEC ↗ |
| Feb 22, 2023 | Ryan Martins | Chief Financial Officer | Sale | 2.5K | $13.89 | $35.3K | SEC ↗ |
| Feb 10, 2023 | Ryan Martins | Chief Financial Officer | Sale | 1.5K | $14.41 | $21.3K | SEC ↗ |
| Feb 8, 2023 | Ryan Martins | Chief Financial Officer | Sale | 3.6K | $13.04 | $46.8K | SEC ↗ |
| Jan 5, 2023 | Ryan Martins | Chief Financial Officer | Sale | 5.9K | $12.51 | $74.4K | SEC ↗ |
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?
89bio, Inc. insiders reported no open-market purchases or sales in the last 12 months. Since November 2019, Trabud has recorded 63 Form 4 filings for ETNB: 25 buys ($259.0M) and 38 sells ($21.6M). Over the full record that is net buying 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.