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89bio, Inc. (ETNB) institutional ownership

Market cap$1.3B SectorHealthcare
Funds holding · Q1 2026
2
reported ETNB position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
0 buyers · 2 sellers

89bio, Inc. (ETNB) price and institutional activity

Dates

Q1 2026

$0 bought by 0 investors
$0 sold by 2 investors
DekaBank Deutsche GirozentraleIfp Advisors, Inc
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Bought Sold Totals per quarter; hover a bar for the names.

89bio, Inc. (ETNB) institutional activity · 2

Investor Type Est. change Change Δ Own Date
DekaBank Deutsche Girozentrale · Exited
Change −90K Δ Own −100.0% Date Q1 2026
DekaBank Deutsche Girozentrale Exited· Q1 2026 −90K −100.0% Q1 2026
Ifp Advisors, Inc · Exited
Change −17 Δ Own −100.0% Date Q1 2026
Ifp Advisors, Inc Exited· Q1 2026 −17 −100.0% Q1 2026
Data through Q1 2026 · filed Q1 2026
2 of 2

Famous investor activity in 89bio, Inc. (ETNB)

89bio, Inc. (ETNB) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Shah Rajeev M. · Director, 10% Owner 10 operations -24.4M
Owned 0 Trade date Oct 30, 2025 Filed date Nov 3, 2025
Shah Rajeev M. Director, 10% Owner 10 operations -24.4M 0 Oct 30, 2025 Nov 3, 2025
Zoth Lota S. · Director 6 operations -186K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
Zoth Lota S. Director 6 operations -186K 0 Oct 30, 2025 Oct 30, 2025
Laporte Kathleen · Director 5 operations -166K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
Laporte Kathleen Director 5 operations -166K 0 Oct 30, 2025 Oct 30, 2025
Hayden Michael R. · Director 3 operations -246K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
Hayden Michael R. Director 3 operations -246K 0 Oct 30, 2025 Oct 30, 2025
Hayden Michael R. · Director 10 operations -234K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
Hayden Michael R. Director 10 operations -234K 0 Oct 30, 2025 Oct 30, 2025
Martins Ryan · Officer Other Form 4 events -374K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
Martins Ryan Officer Other Form 4 events -374K 0 Oct 30, 2025 Oct 30, 2025
Martins Ryan · Officer 6 operations -738K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
Martins Ryan Officer 6 operations -738K 0 Oct 30, 2025 Oct 30, 2025
Martins Ryan · Officer Grant (A) 35K
Owned 374K Trade date Oct 30, 2025 Filed date Oct 30, 2025
Martins Ryan Officer Grant (A) 35K 374K Oct 30, 2025 Oct 30, 2025
Altschuler Steven · Director 7 operations -213K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
Altschuler Steven Director 7 operations -213K 0 Oct 30, 2025 Oct 30, 2025
Palekar Rohan · Director, Officer Other Form 4 events -934K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
Palekar Rohan Director, Officer Other Form 4 events -934K 0 Oct 30, 2025 Oct 30, 2025
Palekar Rohan · Director, Officer 8 operations -2.6M
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
Palekar Rohan Director, Officer 8 operations -2.6M 0 Oct 30, 2025 Oct 30, 2025
Palekar Rohan · Director, Officer Grant (A) 125K
Owned 934K Trade date Oct 30, 2025 Filed date Oct 30, 2025
Palekar Rohan Director, Officer Grant (A) 125K 934K Oct 30, 2025 Oct 30, 2025
McWherter Charles · Director Other Form 4 events -25K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
McWherter Charles Director Other Form 4 events -25K 0 Oct 30, 2025 Oct 30, 2025
McWherter Charles · Director 2 operations -124K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
McWherter Charles Director 2 operations -124K 0 Oct 30, 2025 Oct 30, 2025
Atkinson Edward Morrow III · Director 4 operations -149K
Owned 0 Trade date Oct 30, 2025 Filed date Oct 30, 2025
Atkinson Edward Morrow III Director 4 operations -149K 0 Oct 30, 2025 Oct 30, 2025
15 of 32
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89bio, Inc. (ETNB) activist and large shareholders

What are Schedules 13D and 13G?

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Janus Henderson Group PLC 15.2M
% of shares outstanding 14.3% Filing date Nov 14, 2024
Janus Henderson Group PLC 15.2M 14.3% Nov 14, 2024
Ra Capital Management, L.P. 14.3M
% of shares outstanding 11.9% Filing date Nov 18, 2024
Ra Capital Management, L.P. 14.3M 11.9% Nov 18, 2024
Blackrock, Inc. 7.5M
% of shares outstanding 7.1% Filing date Nov 8, 2024
Blackrock, Inc. 7.5M 7.1% Nov 8, 2024
Rtw Investments, LP 7.4M
% of shares outstanding 7.0% Filing date Nov 14, 2024
Rtw Investments, LP 7.4M 7.0% Nov 14, 2024
BlackRock Inc. 5.5M
% of shares outstanding 5.9% Filing date Jan 29, 2024
BlackRock Inc. 5.5M 5.9% Jan 29, 2024
Suvretta Capital Management, LLC 8.3M
% of shares outstanding 5.6% Filing date Nov 13, 2025
Suvretta Capital Management, LLC 8.3M 5.6% Nov 13, 2025
Adage Capital Partners Gp, L.L.C. 4.2M
% of shares outstanding 4.5% Filing date Feb 7, 2024
Adage Capital Partners Gp, L.L.C. 4.2M 4.5% Feb 7, 2024
Biotechnology Value Fund L P 3.6M
% of shares outstanding 3.4% Filing date Nov 14, 2024
Biotechnology Value Fund L P 3.6M 3.4% Nov 14, 2024
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89bio, Inc. (ETNB) ownership FAQ

Who owns ETNB?

2 reporting institutions disclosed ETNB position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.