In one of the biggest deals of the waning year, Novo Nordisk A/S is buying Akero Therapeutics Inc. to bolster its metabolic dysfunction-associated steatohepatitis (MASH)-treatment portfolio. In the $5.2 billion deal, Akero brings its fibroblast growth factor 21 analogue, efruxifermin, which is in a phase III study for treating those with moderate to advanced liver fibrosis and those with cirrhosis.