SCHEDULE Filed 2025-02-03 Event 2025-01-30 SEC 0001415889-25-002762 →

RA CAPITAL MANAGEMENT, L.P. → 89bio, Inc.

Stake: 15.10% Shares: 20,013,733 CUSIP: 282559103 Class: Common Stock, par value $0.001 per share

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

0 transactions

0 buys · 0 sales · 0 awards/exercises

Issuer Cluster

14 13D/G filings on this issuer

13 other filings besides this one

Filer Track Record

78 filings by this filer

77 other filings in the data moat

Short Interest

—

Not in latest FINRA snapshot

Other 13D/G Filings on 89bio, Inc.

Filed	Form	Filer	Stake	Shares
2025-11-03	SCHEDULE	RA CAPITAL MANAGEMENT, L.P.	—	—	view →
2025-03-03	SCHEDULE	RA CAPITAL MANAGEMENT, L.P.	13.70%	20,013,733	view →
2023-08-11	SC	RA CAPITAL MANAGEMENT, L.P.	—	—	view →
2022-10-21	SC	RA CAPITAL MANAGEMENT, L.P.	—	—	view →
2022-07-06	SC	RA CAPITAL MANAGEMENT, L.P.	—	—	view →
2022-07-05	SC	ORBIMED ADVISORS LLC	—	—	view →
2022-02-07	SC	Longitude Capital Partners III, LLC	—	—	view →
2021-06-04	SC	RA CAPITAL MANAGEMENT, L.P.	—	—	view →
2020-11-25	SC	Longitude Capital Partners III, LLC	—	—	view →
2020-09-23	SC	ORBIMED ADVISORS LLC	—	—	view →
2020-09-21	SC	RA CAPITAL MANAGEMENT, L.P.	—	—	view →
2020-07-20	SC	Longitude Capital Partners III, LLC	—	—	view →
2020-07-10	SC	RA CAPITAL MANAGEMENT, L.P.	—	—	view →

Other Filings by RA CAPITAL MANAGEMENT, L.P.

Filed	Form	Issuer	Stake	Shares
2026-07-23	SCHEDULE 13D/A	ARTIVA BIOTHERAPEUTICS, INC.	—	18,415,956	view →
2026-07-22	SCHEDULE 13D/A	Freenome, Inc.	—	15,367,270	view →
2026-07-21	SCHEDULE 13D/A	VOR BIOPHARMA INC.	—	12,937,855	view →
2026-07-20	SCHEDULE 13G	Agenus Inc.	—	—	view →
2026-07-07	SCHEDULE 13D/A	Climb Bio, Inc. CLYM	33.00%	23,249,186	view →
2026-07-02	SCHEDULE 13D/A	WEREWOLF THERAPEUTICS, INC. HOWL	4.10%	1,985,541	view →
2026-06-26	SCHEDULE 13D/A	WEREWOLF THERAPEUTICS, INC. HOWL	6.00%	2,915,742	view →
2026-06-24	SCHEDULE 13D/A	SOLID BIOSCIENCES INC. SLDB	—	12,036,126	view →
2026-06-22	SCHEDULE 13D/A	WEREWOLF THERAPEUTICS, INC. HOWL	—	3,654,307	view →
2026-06-18	SCHEDULE 13D	Parabilis Medicines, Inc. PBLS	23.80%	28,933,371	view →
2026-06-15	SCHEDULE 13D/A	ARTIVA BIOTHERAPEUTICS, INC. ARTV	36.60%	17,811,623	view →
2026-06-15	SCHEDULE 13D/A	WEREWOLF THERAPEUTICS, INC. HOWL	—	5,138,703	view →
2026-06-03	SCHEDULE 13G	Editas Medicine, Inc. EDIT	—	—	view →
2026-05-21	SCHEDULE 13G	Sana Biotechnology, Inc. SANA	—	—	view →
2026-05-14	SCHEDULE 13D/A	WEREWOLF THERAPEUTICS, INC. HOWL	—	6,116,140	view →
2026-05-13	SCHEDULE 13D/A	ARTIVA BIOTHERAPEUTICS, INC. ARTV	—	16,377,468	view →
2026-01-09	SCHEDULE	Cidara Therapeutics, Inc.	—	—	view →
2025-11-07	SCHEDULE	Sionna Therapeutics, Inc. SION	22.60%	10,071,712	view →
2025-11-07	SCHEDULE	LENZ Therapeutics, Inc. LENZ	13.60%	4,265,106	view →
2025-11-03	SCHEDULE	89bio, Inc.	—	—	view →

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