The biggest M&A activity of the year arrived in the form of Merck KGaA’s earlier-disclosed agreement to buy Springworks Therapeutics Inc. for $47 per share in cash, which represents an equity value of about $3.9 billion and an enterprise value of $3.4 billion, based on Stamford, Conn.-based Springworks’ cash in the bank as of the end of last year.

Snagging its second U.S. FDA approval since being spun out of Pfizer Inc. in 2017, Springworks Therapeutics Inc. is aiming to position Gomekli (mirdametinib), cleared for neurofibromatosis type 1-associated plexiform neurofibromas (NF1-PN) not amenable to complete resection, as a first-in-class drug for adults and potentially best-in-class option for children. The priority approval, which came after market close Feb. 11, more than two weeks ahead of the Feb. 28 PDUFA date, marks the second MEK1/2 inhibitor to hit the market for NF1-PN, a rare, genetic condition.