Sermonix Pharmaceuticals, Inc. → LeonaBio, Inc. LONA

Stake: — Shares: 3,149,470 Class: Common Stock

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 23/100

Active Schedule 13D filer baseline
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

5 13D/G filings on this issuer

4 other filings besides this one

Filer Track Record

2 filings by this filer

1 other filing 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
2026-10-26	SCHEDULE 13D/A	PERCEPTIVE ADVISORS LLC	—	1,889,403	view →
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 Sermonix Pharmaceuticals, Inc.

Filed	Form	Issuer	Stake	Shares
2026-08-31	SCHEDULE 13D	LeonaBio, Inc.	36.90%	5,502,402	view →

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