SCHEDULE 13D/A Filed 2026-10-26 Event 2026-10-26 SEC 0001193125-26-431897 →

PERCEPTIVE ADVISORS LLC → LeonaBio, Inc. LONA

Stake: — Shares: 1,889,403 Class: Common Stock, $0.0001 par value

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 15/100 · Filer 90d Win Rate: 0% · Hist. 90d Edge: +0.0%

Filer track record (6 filings): 0% 90d win rate, +0.0% 90d edge
Short interest building (+355.7% vs prior settlement)

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

4 13D/G filings on this issuer

3 other filings besides this one

Filer Track Record

36 filings by this filer

35 other filings in the data moat

Short Interest · settle 2026-10-15

DTC 1.00

87,344 shares short · +355.7% vs prior

Other 13D/G Filings on LeonaBio, Inc.

Filed	Form	Filer	Stake	Shares
2026-08-31	SCHEDULE 13D	Sermonix Pharmaceuticals, Inc.	36.90%	5,502,402	view →
2026-08-25	SCHEDULE 13D/A	PERCEPTIVE ADVISORS LLC	19.99%	1,889,403	view →
2022-07-01	SC	PERCEPTIVE ADVISORS LLC	—	—	view →

Other Filings by PERCEPTIVE ADVISORS LLC

Filed	Form	Issuer	Stake	Shares
2026-10-14	SCHEDULE 13G	IRulya Therapeutics Inc.	—	—	view →
2026-10-01	SCHEDULE 13D/A	Kardigan, Inc.	—	8,254,144	view →
2026-09-23	SCHEDULE 13G	Nurix Therapeutics, Inc.	—	—	view →
2026-08-27	SCHEDULE 13D/A	Immatics N.V.	—	11,418,016	view →
2026-08-25	SCHEDULE 13D/A	LeonaBio, Inc.	19.99%	1,889,403	view →
2026-08-14	SCHEDULE 13D/A	Solid Biosciences Inc.	11.20%	12,046,579	view →
2026-08-14	SCHEDULE 13D/A	Nautilus Biotechnology, Inc.	9.10%	11,634,211	view →
2026-07-23	SCHEDULE 13G	Freenome, Inc.	—	—	view →
2026-07-20	SCHEDULE 13G	Research Alliance Corporation IV	—	—	view →
2026-06-25	SCHEDULE 13D	Kardigan, Inc. KARD	8.90%	8,254,144	view →
2026-01-26	SCHEDULE	TRINITY BIOTECH PLC TRIB	9.90%	1,463,058,248	view →
2026-01-02	SCHEDULE	MeiraGTx Holdings plc MGTX	12.90%	10,441,562	view →
2025-02-21	SCHEDULE	Solid Biosciences Inc. SLDB	15.60%	11,934,679	view →
2025-02-14	SCHEDULE	TRINITY BIOTECH PLC TRIB	20.90%	85,800,000	view →
2025-01-31	SCHEDULE	Nautilus Biotechnology, Inc. NAUT	10.00%	12,594,211	view →
2023-10-17	SC	Cerevel Therapeutics Holdings, Inc.	—	—	view →
2023-06-06	SC	SOLENO THERAPEUTICS INC SLNO	—	—	view →
2023-05-30	SC	SOLENO THERAPEUTICS INC SLNO	—	—	view →
2023-05-25	SC	SOLENO THERAPEUTICS INC SLNO	—	—	view →
2023-04-25	SC	Cerevel Therapeutics Holdings, Inc.	—	—	view →

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