ETNB

89bio, Inc.

Insider trading activity for 89bio, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 12 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Transaction history

The 100 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Oct 30, 2025	Laporte Kathleen	Director	DTOISS◆	56,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Laporte Kathleen	Director	DTOISS◆	45,150	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Laporte Kathleen	Director	DTOISS◆	27,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Laporte Kathleen	Director	DTOISS◆	12,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Laporte Kathleen	Director	DTOISS◆	25,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	DTOISS◆	56,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	DTOISS◆	45,150	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	DTOISS◆	27,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	DTOISS◆	25,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	DTOISS◆	12,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	DTOISS◆	7,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	DTOISS◆	7,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	DTOISS◆	22,730	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	DTOISS◆	2,933	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	DTOISS◆	27,647	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	UTENDR	61,538	—	—	-100.0%	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	UTENDR	103,978	—	—	-100.0%	Open the original filing on SEC.gov
Oct 30, 2025	Hayden Michael R	Director	UTENDR	80,904	—	—	-100.0%	Open the original filing on SEC.gov
Oct 30, 2025	Martins Ryan	Chief Financial Officer	DTOISS◆	300,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Martins Ryan	Chief Financial Officer	DTOISS◆	175,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Martins Ryan	Chief Financial Officer	DTOISS◆	110,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Martins Ryan	Chief Financial Officer	DTOISS◆	48,102	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Martins Ryan	Chief Financial Officer	DTOISS◆	57,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Martins Ryan	Chief Financial Officer	DTOISS◆	47,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Martins Ryan	Chief Financial Officer	UTENDR	374,295	—	—	-100.0%	Open the original filing on SEC.gov
Oct 30, 2025	Martins Ryan	Chief Financial Officer	AGRANT	35,000	—	—	+10.3%	Open the original filing on SEC.gov
Oct 30, 2025	Altschuler Steven	Director	DTOISS◆	56,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Altschuler Steven	Director	DTOISS◆	45,150	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Altschuler Steven	Director	DTOISS◆	27,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Altschuler Steven	Director	DTOISS◆	25,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Altschuler Steven	Director	DTOISS◆	12,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Altschuler Steven	Director	DTOISS◆	7,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Altschuler Steven	Director	DTOISS◆	40,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Palekar Rohan	Chief Executive Officer	DTOISS◆	848,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Palekar Rohan	Chief Executive Officer	DTOISS◆	605,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Palekar Rohan	Chief Executive Officer	DTOISS◆	300,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Palekar Rohan	Chief Executive Officer	DTOISS◆	220,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Palekar Rohan	Chief Executive Officer	DTOISS◆	203,750	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Palekar Rohan	Chief Executive Officer	DTOISS◆	170,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Palekar Rohan	Chief Executive Officer	DTOISS◆	132,242	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Palekar Rohan	Chief Executive Officer	DTOISS◆	120,231	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Palekar Rohan	Chief Executive Officer	UTENDR	934,273	—	—	-100.0%	Open the original filing on SEC.gov
Oct 30, 2025	Palekar Rohan	Chief Executive Officer	AGRANT	125,000	—	—	+15.4%	Open the original filing on SEC.gov
Oct 30, 2025	McWherter Charles	Director	DTOISS◆	56,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	McWherter Charles	Director	DTOISS◆	67,700	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	McWherter Charles	Director	UTENDR	25,000	—	—	-100.0%	Open the original filing on SEC.gov
Oct 30, 2025	Atkinson Edward Morrow…	Director	DTOISS◆	56,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Atkinson Edward Morrow…	Director	DTOISS◆	45,150	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Atkinson Edward Morrow…	Director	DTOISS◆	27,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Atkinson Edward Morrow…	Director	DTOISS◆	20,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Zoth Lota S.	Director	DTOISS◆	56,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Zoth Lota S.	Director	DTOISS◆	45,150	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Zoth Lota S.	Director	DTOISS◆	27,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Zoth Lota S.	Director	DTOISS◆	25,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Zoth Lota S.	Director	DTOISS◆	12,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Zoth Lota S.	Director	DTOISS◆	20,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	DTOISS◆	17,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	DTOISS◆	26,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	DTOISS◆	320,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	DTOISS◆	195,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	DTOISS◆	120,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	DTOISS◆	70,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	DTOISS◆	67,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	DTOISS◆	3,312	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	DTOISS◆	4,063	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	UTENDR	13,694	—	—	-100.0%	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	UTENDR	351,684	—	—	-100.0%	Open the original filing on SEC.gov
Oct 30, 2025	Le-Nguyen Quoc	See Remarks	AGRANT	50,000	—	—	+16.6%	Open the original filing on SEC.gov
Oct 30, 2025	Babler Martin	Director	DTOISS◆	56,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Babler Martin	Director	DTOISS◆	67,700	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	DiRocco Derek	Director	DTOISS◆	56,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	DiRocco Derek	Director	DTOISS◆	45,150	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	DiRocco Derek	Director	DTOISS◆	27,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	DiRocco Derek	Director	DTOISS◆	25,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	DiRocco Derek	Director	DTOISS◆	12,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	DiRocco Derek	Director	DTOISS◆	7,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	DiRocco Derek	Director	DTOISS◆	7,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Sarena Francis Willard	Chief Operating Officer	DTOISS◆	215,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Sarena Francis Willard	Chief Operating Officer	DTOISS◆	350,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Sarena Francis Willard	Chief Operating Officer	UTENDR	75,310	—	—	-100.0%	Open the original filing on SEC.gov
Oct 30, 2025	Mansbach Harry H	Chief Medical Officer	DTOISS◆	320,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Mansbach Harry H	Chief Medical Officer	DTOISS◆	195,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Mansbach Harry H	Chief Medical Officer	DTOISS◆	120,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Mansbach Harry H	Chief Medical Officer	DTOISS◆	70,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Mansbach Harry H	Chief Medical Officer	DTOISS◆	67,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Mansbach Harry H	Chief Medical Officer	DTOISS◆	45,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Mansbach Harry H	Chief Medical Officer	DTOISS◆	39,037	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Mansbach Harry H	Chief Medical Officer	DTOISS◆	98,204	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Mansbach Harry H	Chief Medical Officer	UTENDR	352,656	—	—	-100.0%	Open the original filing on SEC.gov
Oct 30, 2025	Mansbach Harry H	Chief Medical Officer	AGRANT	50,000	—	—	+16.5%	Open the original filing on SEC.gov
Oct 30, 2025	Ra Capital Management,…	Director, 10% Owner	DTOISS◆	56,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Ra Capital Management,…	Director, 10% Owner	DTOISS◆	45,150	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Ra Capital Management,…	Director, 10% Owner	DTOISS◆	27,400	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Ra Capital Management,…	Director, 10% Owner	DTOISS◆	25,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Ra Capital Management,…	Director, 10% Owner	DTOISS◆	12,500	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Ra Capital Management,…	Director, 10% Owner	DTOISS◆	7,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Ra Capital Management,…	Director, 10% Owner	DTOISS◆	7,000	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Ra Capital Management,…	Director, 10% Owner	DTOISS◆	4.3M	—	—	—	Open the original filing on SEC.gov
Oct 30, 2025	Ra Capital Management,…	Director, 10% Owner	DTOISS	335,364	—	—	-100.0%	Open the original filing on SEC.gov

DTOISS◆—

Laporte Kathleen · DirectorOct 30, 2025

56,400 sh

DTOISS◆—

Laporte Kathleen · DirectorOct 30, 2025

45,150 sh

DTOISS◆—

Laporte Kathleen · DirectorOct 30, 2025

27,400 sh

DTOISS◆—

Laporte Kathleen · DirectorOct 30, 2025

12,500 sh

DTOISS◆—

Laporte Kathleen · DirectorOct 30, 2025

25,000 sh

DTOISS◆—

Hayden Michael R · DirectorOct 30, 2025

56,400 sh

DTOISS◆—

Hayden Michael R · DirectorOct 30, 2025

45,150 sh

DTOISS◆—

Hayden Michael R · DirectorOct 30, 2025

27,400 sh

DTOISS◆—

Hayden Michael R · DirectorOct 30, 2025

25,000 sh

DTOISS◆—

Hayden Michael R · DirectorOct 30, 2025

12,500 sh

DTOISS◆—

Hayden Michael R · DirectorOct 30, 2025

7,000 sh

DTOISS◆—

Hayden Michael R · DirectorOct 30, 2025

7,000 sh

DTOISS◆—

Hayden Michael R · DirectorOct 30, 2025

22,730 sh

DTOISS◆—

Hayden Michael R · DirectorOct 30, 2025

2,933 sh

DTOISS◆—

Hayden Michael R · DirectorOct 30, 2025

27,647 sh

UTENDR—

Hayden Michael R · DirectorOct 30, 2025

61,538 sh · -100.0% own

UTENDR—

Hayden Michael R · DirectorOct 30, 2025

103,978 sh · -100.0% own

UTENDR—

Hayden Michael R · DirectorOct 30, 2025

80,904 sh · -100.0% own

DTOISS◆—

Martins Ryan · Chief Financial…Oct 30, 2025

300,000 sh

DTOISS◆—

Martins Ryan · Chief Financial…Oct 30, 2025

175,000 sh

DTOISS◆—

Martins Ryan · Chief Financial…Oct 30, 2025

110,000 sh

DTOISS◆—

Martins Ryan · Chief Financial…Oct 30, 2025

48,102 sh

DTOISS◆—

Martins Ryan · Chief Financial…Oct 30, 2025

57,500 sh

DTOISS◆—

Martins Ryan · Chief Financial…Oct 30, 2025

47,500 sh

UTENDR—

Martins Ryan · Chief Financial…Oct 30, 2025

374,295 sh · -100.0% own

AGRANT—

Martins Ryan · Chief Financial…Oct 30, 2025

35,000 sh · +10.3% own

DTOISS◆—

Altschuler Steven · DirectorOct 30, 2025

56,400 sh

DTOISS◆—

Altschuler Steven · DirectorOct 30, 2025

45,150 sh

DTOISS◆—

Altschuler Steven · DirectorOct 30, 2025

27,400 sh

DTOISS◆—

Altschuler Steven · DirectorOct 30, 2025

25,000 sh

DTOISS◆—

Altschuler Steven · DirectorOct 30, 2025

12,500 sh

DTOISS◆—

Altschuler Steven · DirectorOct 30, 2025

7,000 sh

DTOISS◆—

Altschuler Steven · DirectorOct 30, 2025

40,000 sh

DTOISS◆—