RA Capital Management Increases Stake in Jade Biosciences

RA Capital Management, L.P., along with Peter Kolchinsky and Rajeev Shah, has filed a Schedule 13G indicating an increased ownership in Jade Biosciences, Inc. The filing reports that RA Capital Management now holds 3,214,969 shares of common stock, representing a 7% ownership stake in the company. This marks a significant increase from previous holdings, with the value of the shares rising by 199.91% and the number of shares increasing by 202.63%. The filing also includes a Joint Filing Agreement, confirming that the parties will file a single statement on Schedule 13G. The effective date of the filing is October 16, 2025.