Merck to Buy Cidara in $9.2B Deal as Patent Deadline Looms

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Merck agreed to acquire Cidara Therapeutics for $9.2 billion, as it looks to offset the patent loss of its cancer drug Keytruda. Merck will pay $221.50 per share in cash, more than double the closing price, to acquire the biotech company. This deal is part of Merck's efforts to bolster its pipeline and mitigate potential losses.

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Merck & Co. agreed to acquire Cidara Therapeutics Inc., a biotech company developing a flu treatment, as part of its ongoing efforts to make up for the upcoming patent loss of its blockbuster cancer drug Keytruda. Merck will pay $221.50 a share in cash for Cidara in a tender offer, more the twice Thursday’s closing price, for a total transaction value of about $9.2 billion, the companies said Friday in a statement. Bloomberg's Madison Muller joins to discuss with Paul Sweeney and Scarlet Fu. (Source: Bloomberg)

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Original article published by Bloomberg on November 14, 2025.
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