RA Capital Management LBRX Position
Active4-Fund ConvergenceRA Capital Management increased their position in LB PHARMACEUTICALS INC (LBRX) in Q4 2025, holding $49.2M worth of shares across 2,208,604 shares.
The position was first reported in Q3 2025 and has been tracked across 2 quarterly 13F filings.
LBRX is a convergence signal: 4 specialist biotech funds hold this stock, suggesting high institutional conviction.
There is an upcoming Phase 3 readout for LB-102 (50 mg tablet) in 440 days (Jun 30, 2027), making the timing of RA Capital's position particularly relevant.
Short interest stands at 11.4% of float with 12.0 days to cover, indicating significant bearish positioning against RA Capital's long thesis.
About LB PHARMACEUTICALS INC
Clinical‑stage biopharmaceutical company developing novel therapies for neuropsychiatric diseases (e.g. schizophrenia, bipolar depression). Lead candidate is LB‑102, a methylated derivative of amisulpride.
Full company profile →Short Interest
11.4%
12.0 days to cover
RA Capital Management LBRX Position History
Frequently Asked Questions
Does RA Capital Management own LBRX?
Yes. As of Q4 2025, RA Capital Management holds 2,208,604 shares of LB PHARMACEUTICALS INC (LBRX) valued at $49.2M. This data comes from their SEC 13F filing.
How many hedge funds own LBRX?
4 specialist biotech hedge funds currently hold LBRX, including Deep Track Capital, Commodore Capital, Baker Bros. Advisors. When 3 or more specialist funds hold the same stock, BiotechEdge flags it as a convergence signal.
When did RA Capital Management first buy LBRX?
RA Capital Management's position in LBRX was first reported in Q3 2025. 13F filings are reported with a 45-day delay, so the actual purchase may have occurred earlier in the quarter.
Is RA Capital Management's LBRX position increasing or decreasing?
RA Capital Management increased their LBRX position in the most recent quarter, adding 431,646 shares.
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