SC Filed 2021-04-13 Event — SEC 0000935836-21-000316 →

EcoR1 Capital, LLC → ANAPTYSBIO, INC ANABV

Stake: — Shares: —

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 6/100 · Filer 90d Win Rate: 0% · Hist. 90d Edge: +0.0%

Filer track record (5 filings): 0% 90d win rate, +0.0% 90d edge
Held by 1 tracked 13F institutional manager

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

6 13D/G filings on this issuer

5 other filings besides this one

Filer Track Record

13 filings by this filer

12 other filings in the data moat

Short Interest

—

Not in latest FINRA snapshot

Institutional Consensus · 2025-12-31

Held by elite portfolio managers

1 holder · $93.71M

Point72 Asset Mgmt

Other 13D/G Filings on ANAPTYSBIO, INC

Filed	Form	Filer	Stake	Shares
2021-05-11	SC	EcoR1 Capital, LLC	—	—	view →
2020-11-18	SC	Frazier Healthcare V, LP	—	—	view →
2019-02-14	SC	Frazier Healthcare V, LP	—	—	view →
2018-05-15	SC	Frazier Healthcare V, LP	—	—	view →
2018-02-26	SC	Frazier Healthcare V, LP	—	—	view →

Other Filings by EcoR1 Capital, LLC

Filed	Form	Issuer	Stake	Shares
2026-07-20	SCHEDULE 13G	Alto Neuroscience, Inc.	—	—	view →
2026-06-25	SCHEDULE 13G	Fulcrum Therapeutics, Inc. FULC	—	—	view →
2026-06-25	SCHEDULE 13G	Fulcrum Therapeutics, Inc. FULC	—	—	view →
2026-06-16	SCHEDULE 13G	Eloxx Pharmaceuticals, Inc. ELOX	—	—	view →
2025-05-19	SCHEDULE	GALAPAGOS NV GLPGF	11.84%	7,803,202	view →
2025-03-17	SCHEDULE	Zymeworks Inc. ZYME	24.20%	16,858,418	view →
2025-02-18	SCHEDULE	Zymeworks Inc. ZYME	22.80%	15,720,161	view →
2025-01-13	SCHEDULE	Zymeworks Inc. ZYME	22.40%	15,411,078	view →
2025-01-03	SCHEDULE	PROTHENA CORP PUBLIC LTD CO PRTA	21.50%	11,584,280	view →
2024-10-08	SC	GALAPAGOS NV GLPGF	—	—	view →
2022-01-14	SC	PROTHENA CORP PUBLIC LTD CO PRTA	—	—	view →
2021-05-11	SC	ANAPTYSBIO, INC ANABV	—	—	view →

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