Filing Manager
ACORN BIOVENTURES, L.P.
Reporting Manager
Anders Hove
Symbol
JSPR
Shares outstanding
27.9M shares
Disclosed Ownership
1.79M shares
Ownership
6.4%
Form type
SCHEDULE 13G
Date filed
12/2/2025, 10:23 AM
Date of event
Dec 1, 2025

Reporting Managers (5)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
ACORN BIOVENTURES, L.P. 2.7% 750K 0 750K Anders Hove Manager of General Partner
ACORN CAPITAL ADVISORS GP, LLC 2.7% 750K 0 750K Anders Hove Manager
ACORN BIOVENTURES 2, L.P. 3.7% 1.04M 0 1.04M Anders Hove Manager of General Partner
Acorn Capital Advisors GP 2, LLC 3.7% 1.04M 0 1.04M Anders Hove Manager
Anders Hove 6.4% 1.79M 0 1.79M Anders Hove Individually