LEONABIO INC

Historical 13F Holders

Symbol: LONA
CUSIP: 04746L203
All holders as of: Q2 2026
Type: Equity
Class: COM

Reported Value, Excluding Options

Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 04746L203 since 12/18/2024, newest first.

Filer	% of Class	Shares	Form	Filed
Sermonix Pharmaceuticals, Inc. 13D	36.9%	5,502,402	13D	8/31/2026 Event 8/24/2026
Sermonix Pharmaceuticals, Inc.	36.9%	5,502,402
Portman David J.	36.9%	5,502,402
Perceptive Advisors LLC 13D/A Amendment 8	20.0%	1,889,403	13D/A Amendment 8	8/25/2026 Event 8/22/2026
Perceptive Advisors LLC	20.0%	1,889,403
Joseph Edelman	20.0%	1,889,403
Perceptive Life Sciences Master Fund, Ltd.	16.5%	1,559,647
Perceptive Xontogeny Venture Fund II, LP	3.8%	359,837
Acorn Bioventures, L.P. 13G/A Amendment 2	12.1%	1,492,521	13G/A Amendment 2	8/20/2026 Event 8/18/2026
Acorn Bioventures, L.P.	5.1%	480,653
Acorn Capital Advisors GP, LLC	5.1%	480,653
Acorn Bioventures 2, L.P.	7.0%	663,763
Acorn Capital Advisors GP 2, LLC	7.0%	663,763
Anders Hove	12.1%	1,492,521
ADAR1 Capital Management, LLC 13G	7.7%	727,481	13G	5/15/2026 Event 3/31/2026
ADAR1 Capital Management, LLC	7.7%	727,481
Daniel Schneeberger	7.7%	727,481
Perceptive Advisors LLC 13D/A Amendment 7	20.0%	1,882,370	13D/A Amendment 7	5/7/2026 Event 5/5/2026
Perceptive Advisors LLC	20.0%	1,882,370
Joseph Edelman	20.0%	1,882,370
Perceptive Life Sciences Master Fund, Ltd.	16.5%	1,552,614
Perceptive Xontogeny Venture Fund II, LP	3.7%	352,804
Baselake Partners, LP 13G/A Amendment 1	1.9%	75,789	13G/A Amendment 1	2/6/2026 Event 12/31/2025
Baselake Partners, LP	1.9%	75,789
Baselake Management, LLC	1.9%	75,789
David Paolella	1.9%	75,789
Perceptive Advisors LLC 13D/A Amendment 6	20.0%	1,859,322	13D/A Amendment 6	1/16/2026 Event 1/16/2026
Perceptive Advisors LLC	20.0%	1,859,322
Joseph Edelman	20.0%	1,859,322
Perceptive Life Sciences Master Fund, Ltd.	16.4%	1,529,566
Perceptive Xontogeny Venture Fund II, LP	3.5%	329,756
Perceptive Advisors LLC 13D/A Amendment 5	20.1%	1,869,050	13D/A Amendment 5	12/23/2025 Event 12/23/2025
Perceptive Advisors LLC	20.0%	1,859,322
Joseph Edelman	20.1%	1,869,050
Perceptive Life Sciences Master Fund, Ltd.	16.4%	1,529,566
Perceptive Xontogeny Venture Fund II, LP	3.5%	329,756
Perceptive Advisors LLC 13D/A Amendment 4	13.9%	550,024	13D/A Amendment 4	12/22/2025 Event 12/18/2025
Perceptive Advisors LLC	13.7%	540,296
Joseph Edelman	13.9%	550,024
Perceptive Life Sciences Master Fund, Ltd.	13.7%	540,296
Baselake Partners, LP 13G	5.0%	197,481	13G	11/14/2025 Event 11/7/2025
Baselake Partners, LP	5.0%	197,481
Baselake Management, LLC	5.0%	197,481
David Paolella	5.0%	197,481

13F Holders by Quarter

Period	Filings	Shares, Excl. Options	Value, Excl. Options	Options Value
2026 Q2	45	7.67 M	$70.4 M	$0
2026 Q1	41	6.85 M	$70.1 M	$0
2025 Q4	42	6.21 M	$46.7 M	$0
2025 Q3	35	1.72 M	$7.62 M	$0