Check out the companies making the biggest moves midday: Chipmakers — Semiconductors were volatile Monday as investors rotated money between the sector and the rest of the market. The VanEck Semiconductor ETF (SMH) was last up 2.5% after falling as much as 3.1%. Shares of Nvidia traded 0.6%, recovering from a 1.4% slide. Micron shares pared earlier losses, trading 2% lower. TopBuild — The insulation and building materials maker’s stock dropped 12% to start the week, putting it on pace for its worst day since March 2020. The move comes as investors brace for TopBuild to be acquired by QXO. The deal was announced in April . Comcast — Shares rose 6% after the company announced it would spin off its media portfolio of NBCUniversal and Sky. The spinoff is expected to be completed in about one year, and will see Comcast co-CEO Mike Cavanagh stepping into the role of leader at NBCUniversal, while former Comcast Chief Financial Officer Michael Angelakis will become chief of the telecommunications company. Rocket Lab , Iridium Communications — The two companies’ stocks jumped after Rocket Lab announced it would acquire Iridium. Rocket Lab said the merger will combine the company’s launch capabilities with Iridium’s satellite communications network. Rocket Lab’s stock jumped more than 9%, while Iridium’s surged more than 21%. A …
