Ownership history in RA CAPITAL MANAGEMENT, L.P. Β· 45 quarters on record
This page tracks every 13F SEC filing in which RA CAPITAL MANAGEMENT, L.P. reported a position in GERON CORP (GERN). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price β sourced directly from SEC EDGAR 13F filings.
π RA CAPITAL MANAGEMENT, L.P. underperformed the S&P 500 by β17.0% annually on this GERN position. Timing score: 62% (5/8 decisions correct). Average cost basis: $3.57. Maximum drawdown during holding period: β86.1%.
β Significantly underperformed the S&P 500 by 17.0% ann.
11 quarters analyzed
β
Decent timing β more right than wrong on entries and exits.
5 of 8 add/trim decisions correct
Best entry: $1.32 (2025 Q4) Β· Worst: $5.37 (2007 Q4)
πͺ Held through 2 major drawdowns (>20%).
5 adds Β· 4 trims. Bought during 4 of 27 down-price quarters. π More buys than sells across the holding period.
π Portfolio weight has been declining in recent quarters. Possible distribution phase.
Currently 0.86% of portfolio
β Based on quarterly 13F SEC filings and end-of-quarter closing prices. Timing score = accuracy of add/trim decisions vs next-quarter price direction. Alpha = mean quarterly excess return Γ 4 (annualised). Not investment advice.
As of 2025 Q4 β sorted by position size