InsideArbitrage Event Driven Monitor – November 17, 2025

CDTX: The acquisition of Cidara Therapeutics, Inc. (CDTX) by Merck & Co., Inc. (MRK) for a closing value of $9.2 billion. Merck, through a subsidiary, will acquire Cidara for $221.5 per share in cash, representing a premium of 108.98% from the stock’s last close. (Press Release)
RPTX: The acquisition of Repare Therapeutics Inc. (RPTX) by XenoTherapeutics, Inc. for a closing value of $6.17 million. Repare shareholders will receive a cash payment per share based on the company’s cash at closing. The current estimate is $1.82 per share, which represents a 10.30% premium from the stock’s last close. Shareholders will also get one non-transferable contingent value right (CVR) per share if certain conditions are met. (Press Release)
NSC: Union Pacific (UNP) and Norfolk Southern (NSC) announced that their shareholders approved the merger between the companies. The deal is expected to close by early 2027.

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