RA CAPITAL MANAGEMENT, L.P. - 12 Sep 2025 SCHEDULE 13G Report for LB PHARMACEUTICALS INC Common Stock, $0.0001 par value per share

Filing Manager
RA CAPITAL MANAGEMENT, L.P.
Reporting Manager
RA Capital Management, L.P.
Security
LB PHARMACEUTICALS INC Common Stock, $0.0001 par value per share
Shares outstanding
22,333,333 shares
Disclosed Ownership
1,675,000 shares
Ownership
7.5%
Form type
SCHEDULE 13G
Filing time
19 Sep 2025, 16:47:50 UTC
Date of event
12 Sep 2025
Next filing
17 Feb 2026
SEC
View on sec.gov

Reporting Managers (4)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
RA Capital Management, L.P. 7.5% 1,675,000 0 1,675,000 /s/ Peter Kolchinsky By Peter Kolchinsky, Authorized Signatory
Peter Kolchinsky 7.5% 1,675,000 0 1,675,000 /s/ Peter Kolchinsky Peter Kolchinsky
Rajeev Shah 7.5% 1,675,000 0 1,675,000 /s/ Rajeev Shah Rajeev Shah
RA Capital Healthcare Fund, L.P. 7.5% 1,675,000 0 1,675,000 /s/ Peter Kolchinsky By RA Capital Healthcare Fund GP, LLC, its General Partner, By Peter Kolchinsky, Manager