ETNB
insider transactions89bio, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 365d
-10.5K
0 buy · 10.5K sell
Net value · 365d
-$115.3K
$0 in · $115.3K out
Sentiment · 365d
Net selling
0% buying · 100% selling
Open-market trades · 365d
1
0 buy · 10.5K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Other·D
Director,TenPercentOwner
$0
12.5K sh
Own -100%
-
Other·D
Director,TenPercentOwner
$0
45.1K sh
Own -100%
-
Other·D
Director,TenPercentOwner
$0
27.4K sh
Own -100%
-
Other·D
Director,TenPercentOwner
$0
25.0K sh
Own -100%
-
Other·D
Director,TenPercentOwner
$0
56.4K sh
Own -100%
-
Other·D
Director,TenPercentOwner
$0
7.0K sh
Own -100%
-
Other·D
Director,TenPercentOwner
$0
7.0K sh
Own -100%
-
Other·D
Director,TenPercentOwner
$0
4.3M sh
Own -100%
-
Other·D
Director,TenPercentOwner
—
335.4K sh
Own -100%
-
Other·D
Director,TenPercentOwner
—
19.6M sh
Own -100%
-
Other·D
Martins Ryan KEY
Chief Financial Officer
$0
47.5K sh
Own -100%
-
Other·D
Martins Ryan KEY
Chief Financial Officer
$0
57.5K sh
Own -100%
-
Other·D
Martins Ryan KEY
Chief Financial Officer
$0
48.1K sh
Own -100%
-
Other·D
Martins Ryan KEY
Chief Financial Officer
$0
110.0K sh
Own -100%
-
Other·D
Martins Ryan KEY
Chief Financial Officer
$0
175.0K sh
Own -100%
-
Other·D
Martins Ryan KEY
Chief Financial Officer
$0
300.0K sh
Own -100%
-
Grant·A
Martins Ryan KEY
Chief Financial Officer
$0
35.0K sh
Own +10%
-
Other·U
Martins Ryan KEY
Chief Financial Officer
—
374.3K sh
-
Other·D
Director
$0
56.4K sh
Own -100%
-
Other·D
Director
$0
67.7K sh
Own -100%
-
Other·D
Director
$0
56.4K sh
Own -100%
-
Other·D
Director
$0
45.1K sh
Own -100%
-
Other·D
Director
$0
25.0K sh
Own -100%
-
Other·D
Director
$0
12.5K sh
Own -100%
-
Other·D
Director
$0
27.4K sh
Own -100%
-
Other·D
Chief Medical Officer
$0
45.0K sh
Own -100%
-
Other·D
Chief Medical Officer
$0
70.0K sh
Own -100%
-
Other·D
Chief Medical Officer
$0
195.0K sh
Own -100%
-
Other·D
Chief Medical Officer
$0
320.0K sh
Own -100%
-
Other·D
Chief Medical Officer
$0
120.0K sh
Own -100%
-
Other·D
Chief Medical Officer
$0
67.5K sh
Own -100%
-
Other·D
Chief Medical Officer
$0
98.2K sh
Own -100%
-
Other·D
Chief Medical Officer
$0
39.0K sh
Own -100%
-
Grant·A
Chief Medical Officer
$0
50.0K sh
Own +17%
-
Other·U
Chief Medical Officer
—
352.7K sh
-
Other·D
See Remarks
$0
195.0K sh
Own -100%
-
Other·D
See Remarks
$0
50.0K sh
Own -100%
-
Other·D
See Remarks
$0
67.5K sh
Own -100%
-
Other·D
See Remarks
$0
70.0K sh
Own -100%
-
Other·D
See Remarks
$0
120.0K sh
Own -100%
-
Other·D
See Remarks
$0
3.3K sh
Own -100%
-
Other·D
See Remarks
$0
320.0K sh
Own -100%
-
Other·D
See Remarks
$0
26.4K sh
Own -100%
-
Other·D
See Remarks
$0
17.5K sh
Own -100%
-
Other·D
See Remarks
$0
4.1K sh
Own -100%
-
Other·U
See Remarks
—
13.7K sh
-
Other·U
See Remarks
—
351.7K sh
-
Grant·A
See Remarks
$0
50.0K sh
Own +17%
-
Other·D
Director
$0
56.4K sh
Own -100%
-
Other·D
Director
$0
45.1K sh
Own -100%
-
Other·D
Director
$0
27.4K sh
Own -100%
-
Other·D
Director
$0
20.0K sh
Own -100%
-
Other·D
Director
$0
56.4K sh
Own -100%
-
Other·D
Director
$0
45.1K sh
Own -100%
-
Other·D
Director
$0
27.4K sh
Own -100%
-
Other·D
Director
$0
25.0K sh
Own -100%
-
Other·D
Director
$0
12.5K sh
Own -100%
-
Other·D
Director
$0
20.0K sh
Own -100%
-
Other·D
Director
$0
67.7K sh
Own -100%
-
Other·D
Director
$0
56.4K sh
Own -100%
-
Other·U
Director
—
25.0K sh
-
Other·D
Chief Operating Officer
$0
215.0K sh
Own -100%
-
Other·D
Chief Operating Officer
$0
350.0K sh
Own -100%
-
Other·U
Chief Operating Officer
—
75.3K sh
-
Other·D
Director
$0
7.0K sh
Own -100%
-
Other·D
Director
$0
7.0K sh
Own -100%
-
Other·D
Director
$0
12.5K sh
Own -100%
-
Other·D
Director
$0
25.0K sh
Own -100%
-
Other·D
Director
$0
27.4K sh
Own -100%
-
Other·D
Director
$0
45.1K sh
Own -100%
-
Other·D
Director
$0
56.4K sh
Own -100%
-
Other·D
PALEKAR ROHAN KEY
Chief Executive Officer
$0
170.0K sh
Own -100%
-
Other·D
PALEKAR ROHAN KEY
Chief Executive Officer
$0
203.8K sh
Own -100%
-
Other·D
PALEKAR ROHAN KEY
Chief Executive Officer
$0
220.0K sh
Own -100%
-
Other·D
PALEKAR ROHAN KEY
Chief Executive Officer
$0
120.2K sh
Own -100%
-
Other·D
PALEKAR ROHAN KEY
Chief Executive Officer
$0
132.2K sh
Own -100%
-
Other·D
PALEKAR ROHAN KEY
Chief Executive Officer
$0
848.0K sh
Own -100%
-
Other·D
PALEKAR ROHAN KEY
Chief Executive Officer
$0
605.0K sh
Own -100%
-
Other·D
PALEKAR ROHAN KEY
Chief Executive Officer
$0
300.0K sh
Own -100%
-
Grant·A
PALEKAR ROHAN KEY
Chief Executive Officer
$0
125.0K sh
Own +15%
-
Other·U
PALEKAR ROHAN KEY
Chief Executive Officer
—
934.3K sh
-
Other·D
Director
$0
56.4K sh
Own -100%
-
Other·D
Director
$0
12.5K sh
Own -100%
-
Other·D
Director
$0
25.0K sh
Own -100%
-
Other·D
Director
$0
45.1K sh
Own -100%
-
Other·D
Director
$0
27.4K sh
Own -100%
-
Other·D
Director
$0
40.0K sh
Own -100%
-
Other·D
Director
$0
7.0K sh
Own -100%
-
Other·D
Director
$0
45.1K sh
Own -100%
-
Other·D
Director
$0
22.7K sh
Own -100%
-
Other·D
Director
$0
2.9K sh
Own -100%
-
Other·D
Director
$0
7.0K sh
Own -100%
-
Other·D
Director
$0
7.0K sh
Own -100%
-
Other·D
Director
$0
12.5K sh
Own -100%
-
Other·D
Director
$0
25.0K sh
Own -100%
-
Other·D
Director
$0
27.4K sh
Own -100%
-
Other·D
Director
$0
56.4K sh
Own -100%
-
Other·D
Director
$0
27.6K sh
Own -100%
-
Other·U
Director
—
104.0K sh
-
Other·U
Director
—
61.5K sh
-
Other·U
Director
—
80.9K sh
-
Exercise·M
Martins Ryan KEY
Chief Financial Officer
$0
3.9K sh
Own +9%
-
Exercise·M
Martins Ryan KEY
Chief Financial Officer
$0
76.9K sh
Own New
-
Exercise·M
Martins Ryan KEY
Chief Financial Officer
$239.2K
76.9K sh · $3.11
Own +30%
-
Exercise·M
Martins Ryan KEY
Chief Financial Officer
$17.3K
3.9K sh · $4.44
Own +1%
-
Other·F
Chief Operating Officer
$28.9K
3.0K sh · $9.69
Own -4%
-
Other·F
Chief Operating Officer
$29.4K
3.2K sh · $9.16
Own -4%
-
Other·F
Chief Medical Officer
$70.3K
7.7K sh · $9.16
Own -2%
-
Other·F
PALEKAR ROHAN KEY
Chief Executive Officer
$511.5K
55.8K sh · $9.16
Own -6%
-
Other·F
Martins Ryan KEY
Chief Financial Officer
$70.3K
7.7K sh · $9.16
Own -3%
-
Other·F
See Remarks
$70.3K
7.7K sh · $9.16
Own -2%
-
Other·F
See Remarks
$4.8K
522 sh · $9.16
Own -4%
-
Sell·S
See Remarks · 10b5-1
$115.3K
10.5K sh · $11.02
Own -3%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Oct 30, 2025 | Shah Rajeev M. | Other D | 12.5K | $0 |
| Oct 30, 2025 | Shah Rajeev M. | Other D | 45.1K | $0 |
| Oct 30, 2025 | Shah Rajeev M. | Other D | 27.4K | $0 |
| Oct 30, 2025 | Shah Rajeev M. | Other D | 25.0K | $0 |
| Oct 30, 2025 | Shah Rajeev M. | Other D | 56.4K | $0 |
| Oct 30, 2025 | Shah Rajeev M. | Other D | 7.0K | $0 |
| Oct 30, 2025 | Shah Rajeev M. | Other D | 7.0K | $0 |
| Oct 30, 2025 | Shah Rajeev M. | Other D | 4.3M | $0 |
| Oct 30, 2025 | Shah Rajeev M. | Other D | 335.4K | — |
| Oct 30, 2025 | Shah Rajeev M. | Other D | 19.6M | — |
| Oct 30, 2025 | Martins Ryan KEY | Other D | 47.5K | $0 |
| Oct 30, 2025 | Martins Ryan KEY | Other D | 57.5K | $0 |
| Oct 30, 2025 | Martins Ryan KEY | Other D | 48.1K | $0 |
| Oct 30, 2025 | Martins Ryan KEY | Other D | 110.0K | $0 |
| Oct 30, 2025 | Martins Ryan KEY | Other D | 175.0K | $0 |
| Oct 30, 2025 | Martins Ryan KEY | Other D | 300.0K | $0 |
| Oct 30, 2025 | Martins Ryan KEY | Grant A | 35.0K | $0 |
| Oct 30, 2025 | Martins Ryan KEY | Other U | 374.3K | — |
| Oct 30, 2025 | Babler Martin | Other D | 56.4K | $0 |
| Oct 30, 2025 | Babler Martin | Other D | 67.7K | $0 |
| Oct 30, 2025 | LAPORTE KATHLEEN | Other D | 56.4K | $0 |
| Oct 30, 2025 | LAPORTE KATHLEEN | Other D | 45.1K | $0 |
| Oct 30, 2025 | LAPORTE KATHLEEN | Other D | 25.0K | $0 |
| Oct 30, 2025 | LAPORTE KATHLEEN | Other D | 12.5K | $0 |
| Oct 30, 2025 | LAPORTE KATHLEEN | Other D | 27.4K | $0 |
| Oct 30, 2025 | Mansbach Harry H | Other D | 45.0K | $0 |
| Oct 30, 2025 | Mansbach Harry H | Other D | 70.0K | $0 |
| Oct 30, 2025 | Mansbach Harry H | Other D | 195.0K | $0 |
| Oct 30, 2025 | Mansbach Harry H | Other D | 320.0K | $0 |
| Oct 30, 2025 | Mansbach Harry H | Other D | 120.0K | $0 |
| Oct 30, 2025 | Mansbach Harry H | Other D | 67.5K | $0 |
| Oct 30, 2025 | Mansbach Harry H | Other D | 98.2K | $0 |
| Oct 30, 2025 | Mansbach Harry H | Other D | 39.0K | $0 |
| Oct 30, 2025 | Mansbach Harry H | Grant A | 50.0K | $0 |
| Oct 30, 2025 | Mansbach Harry H | Other U | 352.7K | — |
| Oct 30, 2025 | Le-Nguyen Quoc | Other D | 195.0K | $0 |
| Oct 30, 2025 | Le-Nguyen Quoc | Other D | 50.0K | $0 |
| Oct 30, 2025 | Le-Nguyen Quoc | Other D | 67.5K | $0 |
| Oct 30, 2025 | Le-Nguyen Quoc | Other D | 70.0K | $0 |
| Oct 30, 2025 | Le-Nguyen Quoc | Other D | 120.0K | $0 |
| Oct 30, 2025 | Le-Nguyen Quoc | Other D | 3.3K | $0 |
| Oct 30, 2025 | Le-Nguyen Quoc | Other D | 320.0K | $0 |
| Oct 30, 2025 | Le-Nguyen Quoc | Other D | 26.4K | $0 |
| Oct 30, 2025 | Le-Nguyen Quoc | Other D | 17.5K | $0 |
| Oct 30, 2025 | Le-Nguyen Quoc | Other D | 4.1K | $0 |
| Oct 30, 2025 | Le-Nguyen Quoc | Other U | 13.7K | — |
| Oct 30, 2025 | Le-Nguyen Quoc | Other U | 351.7K | — |
| Oct 30, 2025 | Le-Nguyen Quoc | Grant A | 50.0K | $0 |
| Oct 30, 2025 | Atkinson Edward Morrow III | Other D | 56.4K | $0 |
| Oct 30, 2025 | Atkinson Edward Morrow III | Other D | 45.1K | $0 |
| Oct 30, 2025 | Atkinson Edward Morrow III | Other D | 27.4K | $0 |
| Oct 30, 2025 | Atkinson Edward Morrow III | Other D | 20.0K | $0 |
| Oct 30, 2025 | Zoth Lota S. | Other D | 56.4K | $0 |
| Oct 30, 2025 | Zoth Lota S. | Other D | 45.1K | $0 |
| Oct 30, 2025 | Zoth Lota S. | Other D | 27.4K | $0 |
| Oct 30, 2025 | Zoth Lota S. | Other D | 25.0K | $0 |
| Oct 30, 2025 | Zoth Lota S. | Other D | 12.5K | $0 |
| Oct 30, 2025 | Zoth Lota S. | Other D | 20.0K | $0 |
| Oct 30, 2025 | McWherter Charles | Other D | 67.7K | $0 |
| Oct 30, 2025 | McWherter Charles | Other D | 56.4K | $0 |
| Oct 30, 2025 | McWherter Charles | Other U | 25.0K | — |
| Oct 30, 2025 | Sarena Francis Willard | Other D | 215.0K | $0 |
| Oct 30, 2025 | Sarena Francis Willard | Other D | 350.0K | $0 |
| Oct 30, 2025 | Sarena Francis Willard | Other U | 75.3K | — |
| Oct 30, 2025 | DiRocco Derek | Other D | 7.0K | $0 |
| Oct 30, 2025 | DiRocco Derek | Other D | 7.0K | $0 |
| Oct 30, 2025 | DiRocco Derek | Other D | 12.5K | $0 |
| Oct 30, 2025 | DiRocco Derek | Other D | 25.0K | $0 |
| Oct 30, 2025 | DiRocco Derek | Other D | 27.4K | $0 |
| Oct 30, 2025 | DiRocco Derek | Other D | 45.1K | $0 |
| Oct 30, 2025 | DiRocco Derek | Other D | 56.4K | $0 |
| Oct 30, 2025 | PALEKAR ROHAN KEY | Other D | 170.0K | $0 |
| Oct 30, 2025 | PALEKAR ROHAN KEY | Other D | 203.8K | $0 |
| Oct 30, 2025 | PALEKAR ROHAN KEY | Other D | 220.0K | $0 |
| Oct 30, 2025 | PALEKAR ROHAN KEY | Other D | 120.2K | $0 |
| Oct 30, 2025 | PALEKAR ROHAN KEY | Other D | 132.2K | $0 |
| Oct 30, 2025 | PALEKAR ROHAN KEY | Other D | 848.0K | $0 |
| Oct 30, 2025 | PALEKAR ROHAN KEY | Other D | 605.0K | $0 |
| Oct 30, 2025 | PALEKAR ROHAN KEY | Other D | 300.0K | $0 |
| Oct 30, 2025 | PALEKAR ROHAN KEY | Grant A | 125.0K | $0 |
| Oct 30, 2025 | PALEKAR ROHAN KEY | Other U | 934.3K | — |
| Oct 30, 2025 | Altschuler Steven | Other D | 56.4K | $0 |
| Oct 30, 2025 | Altschuler Steven | Other D | 12.5K | $0 |
| Oct 30, 2025 | Altschuler Steven | Other D | 25.0K | $0 |
| Oct 30, 2025 | Altschuler Steven | Other D | 45.1K | $0 |
| Oct 30, 2025 | Altschuler Steven | Other D | 27.4K | $0 |
| Oct 30, 2025 | Altschuler Steven | Other D | 40.0K | $0 |
| Oct 30, 2025 | Altschuler Steven | Other D | 7.0K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other D | 45.1K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other D | 22.7K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other D | 2.9K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other D | 7.0K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other D | 7.0K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other D | 12.5K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other D | 25.0K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other D | 27.4K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other D | 56.4K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other D | 27.6K | $0 |
| Oct 30, 2025 | Hayden Michael R | Other U | 104.0K | — |
| Oct 30, 2025 | Hayden Michael R | Other U | 61.5K | — |
| Oct 30, 2025 | Hayden Michael R | Other U | 80.9K | — |
| Oct 22, 2025 | Martins Ryan KEY | Exercise M | 3.9K | $0 |
| Oct 22, 2025 | Martins Ryan KEY | Exercise M | 76.9K | $0 |
| Oct 22, 2025 | Martins Ryan KEY | Exercise M | 76.9K | $239.2K |
| Oct 22, 2025 | Martins Ryan KEY | Exercise M | 3.9K | $17.3K |
| Aug 5, 2025 | Sarena Francis Willard | Other F | 3.0K | $28.9K |
| Aug 1, 2025 | Sarena Francis Willard | Other F | 3.2K | $29.4K |
| Aug 1, 2025 | Mansbach Harry H | Other F | 7.7K | $70.3K |
| Aug 1, 2025 | PALEKAR ROHAN KEY | Other F | 55.8K | $511.5K |
| Aug 1, 2025 | Martins Ryan KEY | Other F | 7.7K | $70.3K |
| Aug 1, 2025 | Le-Nguyen Quoc | Other F | 7.7K | $70.3K |
| Aug 1, 2025 | Le-Nguyen Quoc | Other F | 522 | $4.8K |
| Jul 15, 2025 | Le-Nguyen Quoc 10b5-1 | Sell S | 10.5K | $115.3K |
About ETNB insider trading
This page tracks insider transactions for 89bio, Inc. (ETNB) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.