* Nvidia–Arm (abandoned): Scrapped after U.S., UK, and EU enforcers argued Nvidia could use control of Arm’s neutral chip IP to disadvantage rival chipmakers and harm innovation.
* Penguin Random House–Simon & Schuster (blocked): U.S. DOJ convinced a court the deal would give the combined publisher monopsony power over authors, reducing advances and competition to acquire manuscripts.
* Illumina–Grail (blocked/unwound in EU): EU authorities found that letting Illumina, a dominant sequencing supplier, buy Grail would let it foreclose rival test developers in early cancer detection
* AT&T–Time Warner (approved): DOJ lost in court; the judge found insufficient proof that integrating content (HBO, Turner) with AT&T’s distribution would significantly raise rivals’ costs or consumer prices.
* Tapestry–Capri (abandoned): U.S. lawsuit argued it would overly concentrate “accessible luxury” handbags (Coach/Kate Spade with Michael Kors/Versace), risking higher prices and less choice, so the parties walked away.
* JetBlue–Spirit (blocked): A federal judge agreed with DOJ that removing Spirit as an ultra‑low‑cost competitor would reduce fare competition, leading to higher prices for budget travelers.
* Amazon–iRobot (abandoned): Dropped after U.S. and EU scrutiny over Amazon potentially using smart‑home and retail power to disadvantage rival robot‑vacuum makers and entrench its ecosystem.
* Netflix–Warner Bros Discovery (pending): Now under DOJ review; concerns center on Netflix potentially cementing dominance in streaming, reducing content and talent competition, and raising rivals’ costs by controlling WBD’s library and HBO Max.