Merck’s $9.2 Billion Bid Sends Cidara Therapeutics (CDTX) Soaring 105% on November 14, 2025
Cidara Therapeutics, Inc. (NASDAQ: CDTX) is at the center of Wall Street’s attention today after Merck & Co., Inc. (NYSE: MRK) agreed to acquire the San Diego–based biotech in a cash deal valued at approximately $9.2 billion, sending CDTX shares more than 100% higher in a single session. Reuters+1 Below is a detailed look at today’s news (14 November 2025), the science behind Cidara’s lead flu-prevention asset CD388, the stock market reaction, and the wave of shareholder-law-firm investigations that emerged within hours of the announcement. Merck to Acquire Cidara for $221.50 Per Share in Cash Merck and Cidara announced this