Shots:Alumis and ACELYRIN have amended their 2025 merger agreement, which originally granted ACELYRIN stockholders 0.4274 Alumis shares/share, giving them a 45% stake in the combined companyAs per the amendment, ACELYRIN stockholders will receive 0.4814 Alumis shares/share, allowing them to own 48% of the combined entity on a fully diluted basis; closing expected in Q2'25…