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%. Nvidia traded 0.6%, recovering from a 1.4% slide. Micron pared earlier losses, trading 2% lower. TopBuild — The insulation and building materials maker 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 spin-off 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 CFO 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 jumped more than 9%, while Iridium surged more than 21%. AppLovin — Shares climbed more than 4% after Raymond James initiated coverage of the digital advertising platform with a strong buy rating and a $640 pice target. Stepping into the e-commerce advertising market will be a "significant long-term growth opportunity" for AppLovin, the firm said. SpaceX — The stock rose 2% after Nasdaq announced on Friday that SpaceX would be added to the Nasdaq 100 index before trading on July 7. Its inclusion could lead to a wave of ETF buying demand. Charter Communications — The home internet provider gained 11.4% on a Bloomberg report from Friday that said the company and SpaceX had held exclusive talks on a consumer phone product. The report said Charter could run some of SpaceX's consumer mobile phone traffic through its ground internet infrastructure. Alphabet — Shares were up 4% as the "Magnificent Seven" darling began trading on the Dow Jones Industrial Average . Alphabet replaced Verizon on the 30-member blue chip index. Verizon Communications — The telecommunications company was off 7% after it projected second quarter losses between $700 million and $800 million. The estimate comes from the company classifying businesses its contributing as part of a joint venture with U.K.-based BT Group as held for sale. If the decline holds, it will mark the stock's worst day since July 17, 2023, when it lost 7.5%. Martin Marietta Materials — Shares slipped 6% after the company announced an agreement to combine with Lhoist North America for $13.5 billion in cash. The natural resource building materials company said Lhoist will expand its portfolio in industrial minerals. TeraWulf — Shares were down 3% even after Citi initiated coverage with a buy rating. Analysts at the bank said the company is addressing key bottlenecks when it comes to delivering power for data centers, making it an attractive AI trade play. Quantinuum – The quantum computing stock dropped more than 2% even as a slate of Wall Street firms initiated coverage of the company on a bullish note. JPMorgan dubbed Quantinuum as "a leader in quantum computing with two-qubit gate fidelity that is among the highest in the industry." Quantinuum debuted on the Nasdaq earlier this month. It was formed in 2021 through a merger of Honeywell's quantum computing business and Cambridge Quantum. Doximity — Shares of the online platform for medical professionals shed 1.4% following a double downgrade at Bank of America to underperform from buy. The bank sees execution risks related to the pivot to artificial intelligence, as well as limited clarity on the trajectory of its revenue and margins. — CNBC's Darla Mercado, Ananya Chetia and Michelle Fox contributed reporting.
<small>Source: CNBC</small>
