There have been plenty of multi-billion-dollar mega mergers in the past few years but most have fallen short of their goals. In the latest edition of the BioWorld Insider podcast, Karen Carey, BioWorld’s senior managing editor and chief analyst, unpacked the details in 21 of the biggest M&As and found very few have turned out to be good deals for the buyer.

Boehringer Ingelheim GmbH terminated its second metabolic dysfunction-associated steatohepatitis (MASH) alliance on March 6, ending an $870 million license agreement inked with Yuhan Corp. for dual GLP-1/FGF21 agonist, BI-3006337 (YH-25724). Yuhan said March 7 that Boehringer, of Ingelheim, Germany, returned rights to YH-25724, a dual-acting glucagon-like peptide-1 and fibroblast growth factor 21 receptor agonist, based on the counterparty’s “strategic judgement” on developing MASH therapeutics.

Astellas Pharma Inc. is setting up a joint venture with Yaskawa Electric Corp. to develop a new cell production platform using Yaskawa’s dual-arm humanoid robot called Maholo.

Repligen Corp. acquired 908 Devices Inc.’s desktop portfolio of four devices for bioprocessing process analytical technology (PAT) applications for $70 million in cash.

Jazz Pharmaceuticals plc is buying Chimerix Inc. for $8.55 a share in cash, bringing the deal in at about $935 million. Jazz expands its cancer pipeline with the new acquisition’s lead candidate, dordaviprone, a small molecule for treating a rare, aggressive glioma that’s often found in children and young adults.

Ajax Health LLC, with backing from the $4 billion KKR Health Care Strategic Growth Fund II, and Boston Scientific Corp. launched a new business, Flowmod, to advance a system for treating heart failure developed by Boston Sci.

Abbvie Inc. is buying into the obesity fray in a potential $1.875 billion development and commercialization agreement with Danish peptide drug discovery specialist Gubra A/S. In addition, there will be a $350 million up-front payment as Abbvie takes over the reins of GUB-014295 (referred to as Gubamy), a long-acting analog of the satiety hormone amylin, currently in phase I development.

Boston Scientific Corp. agreed to acquire Sonivie Ltd., developer of a therapeutic intravascular ultrasound system for denervation to treat resistant hypertension, pulmonary hypertension and chronic obstructive pulmonary disease. On a 100% basis, the deal is valued at $600 million with $400 million up front and $200 million upon achievement of a regulatory milestone.