Companies / LeonaBio, Inc.

LeonaBio, Inc.

Nasdaq: ATHALONACIK 1620463BOTHELL, WA

Financials

Revenue—
Net income$-105.61M
Total debt—
Cash$32.83M
Diluted EPS$-24.70
Shares outstanding9.4M

Ownership

9.4M shares outstanding · as of May 5, 2026
1.4%Insiders
Ownership
Insiders1.42%133,218
Institutions63.90%6,002,558
Public float34.68%3,257,738

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 9

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Insider% of sharesShares
Litton Mark JamesCEOPRESIDENT and CEO · Director
0.62%57,926
Church KevinCHIEF SCIENTIFIC OFFICER
0.27%25,178
Worthington MarkGENERAL COUNSEL and CCO
0.20%18,376
San Martin JavierCHIEF MEDICAL OFFICER
0.17%15,887
Renninger RobertCHIEF FINANCIAL OFFICER
0.17%15,851
Edelman JosephDirector
——
Fluke John M JrDirector
——
Johnson James aDirector
——
Pickering GrantDirector
——

Institutional holders 43

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HolderValue% of shares
Perceptive Advisors LLC$19.11M19.79%
Acorn Capital Advisors, LLC$3.80M5.34%
NEA Management Company, LLC$3.52M4.94%
Commodore Capital LP$3.52M4.94%
TCG Crossover Management, LLC$3.35M4.94%
Kalehua Capital Management LLC$2.98M4.19%
Spruce Street Capital LP$2.98M4.19%
ADAR1 Capital Management, LLC$2.89M4.19%
Vanguard Group Inc$1.16M1.64%
Simplify Asset Management Inc.$1.13M1.59%

Activity

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InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Mar 4, 2026Litton Mark James
CEO
SellCommon Stock$27.7K-5K
-8.17%
57,926
0.62% of shares
low
Jan 2, 2026Litton Mark James
CEO
SellCommon Stock$17.8K-3K
-5.96%
40,828
0.43% of shares
low
Jan 2, 2026San Martin Javier
Executive
SellCommon Stock$11.3K-2K
-13.89%
10,189
0.11% of shares
low
Mar 4, 2026San Martin Javier
Executive
SellCommon Stock$9.2K-2K
-9.77%
15,887
0.17% of shares
low
Mar 4, 2026Church Kevin
Executive
SellCommon Stock$7.3K-1K
-5.12%
25,178
0.27% of shares
low
Mar 4, 2026Worthington Mark
Executive
SellCommon Stock$7.1K-1K
-6.74%
18,376
0.20% of shares
low
Jan 2, 2026Church Kevin
Executive
SellCommon Stock$6.0K-876
-4.06%
20,681
0.22% of shares
low
Jan 2, 2026Worthington Mark
Executive
SellCommon Stock$6.0K-876
-5.90%
13,978
0.15% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Acorn Bioventures, L.P.Passive13G/A———
Baselake Partners, LPPassive13G/A———

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
LONACommon StockEquity04746L203BBG00C77LX40