China's antitrust regulator this morning announced an investigation into Nvidia, the Silicon Valley chipmaker whose GPUs are driving the AI revolution.

Why it matters: This is the sort of thing that could escalate supply chain skirmishes into a tech trade war.

State of play: China's antitrust investigation relates to promises that Nvidia made in 2020, in order to garner approval for its $7 billion acquisition of U.S.-based Mellanox Technologies.

• It didn't get more granular, but we know that Nividia had pledged that the deal wouldn't slow the flow of Mellanox products to China.
• Since then, however, the Biden administration has implemented several crackdowns on Nvidia chip sales to China, while China last week retaliated by blocking the export of certain rare minerals to the U.S.

Zoom out: All of this comes before tariff enthusiast Donald Trump reenters the White House, where he's likely to be joined by China hawk Jamieson Greer as U.S. trade representative.

• Plus a bunch of tech advisers, both formal and informal, who have talked a lot about making sure that the U.S. stays ahead of China in the AI race.

Investor reax: Nvidia shares fell 2.4% at today's open, and everyone will be paying very close attention given how it's been the bull market's biggest driver.

Thought bubble: Beijing already doesn't want to let ByteDance divest TikTok, even though that has nothing to do with AI chips, and this may signal the strength of its resolve.

• Trump has signaled his opposition to that ban, in a reversal of his prior position, but he doesn't seem to have much wiggle room unless TikTok wins an appeal to the Supreme Court.

Counterargument: The U.S. Justice Department also is investigating Nvidia on antitrust grounds, so there could be less geopolitical tension here than meets the eye.

The bottom line: Dealmaking between U.S. and Chinese tech companies is essentially dead, and today feels like another shovel of dirt.

Omnicom Group (NYSE: OMC) has agreed to acquire Interpublic Group (NYSE: IPG) for around $13.3 billion in stock.

Why it's the BFD: It would create the world's largest advertising agency, overtaking current leader WPP.

The bottom line: "It's been more than a decade since two major ad agencies tried to combine. Omnicom and Publicis announced a merger in 2013, but it fell apart less than a year later ... This combination could usher in more consolidation." — Sara Fischer & Kerry Flynn, Axios

• Nscale, a U.K. AI hyperscaler, raised $155m in Series A funding. Sandton Capital Partners led, and was joined by Kestrel, Bluesky Asset Management, and Florence Capital. axios.link/4g3suE1

🚑 Cala Health, a San Mateo, Calif., bioelectronic medicine startup, raised $50m. Vertex Growth Fund and Nexus NeuroTech Ventures co-led, and were joined by Action Potential, Johnson & Johnson, Lightstone, Lux, GV, OSF Ventures, Ascension Ventures, TriVentures, Reimagined Ventures, Peak6, and Fiscus. calahealth.com

• WaveForms AI, an audio LLM startup, raised $40m in seed funding led by a16z. axios.link/49qwnQT

• Pixxel, an LA-based developer of a hyperspectral satellite constellation, raised $24m in Series B extension funding that includes new investors M&G Catalyst and Glade Brook Capital Partners. pixxel.space

• GovSignals, a Washington, D.C.-based AI platform for government contract procurement, raised $5.5m in seed funding led by Unusual Ventures, per Axios. axios.link/3ZKGnkO

🚑 Anise Health, a digital mental health startup for Asian Americans, raised $3m in seed funding led by Kicker Ventures, per Axios Pro. axios.link/49AF1fK

• Zimi, a cross-border commerce startup, raised $2m in seed funding led by Fearless Fund, with YC participating. axios.link/3ZpkxBT

🚑 Argosy Healthcare Partners sponsored a recap of Nicklas Medical Staffing, a Jacksonville, Fla.-based staffing firm for pathology and histology labs. nicklasstaffing.com

• Blackstone and EQT advanced to the second round of bidding for Urbaser, a Spanish waste management company being sold by Platinum Equity for around €5b, per Reuters. axios.link/4fbWagR

🚑 CVC Capital Partners is exploring a purchase of CompuGroup, Medical, a listed German provider of health-care software with around an €879m market cap, per Bloomberg. axios.link/4fovrOp

⚡ Davidson Kempner and Nature Infrastructure Capital acquired the Dutch solar and storage project development platform of Germany's Greencells. axios.link/41qWTaB

⚡ Dow (NYSE: DOW) agreed to sell a 40% stake in select U.S. Gulf Coast infrastructure assets to Macquarie Asset Management for around $2.4b. axios.link/49qln63

• Novolex, a Hartsville, S.C.-based packaging firm owned by Apollo Global Management and CPP Investments, agreed to buy Pactiv Evergreen (Nasdaq: PTVE) for $6.7b in cash, or $18 per share. axios.link/3VuBslw

• Platinum Equity invested in Global the Source, a master distributor of HVAC/R components, with will be merged with existing Platinum portfolio company MARS. axios.link/3D92HM8

• Recognize invested in SDG Corp., a Norwalk, Conn.-based provider of cybersecurity services. sdgc.com

ServiceTitan is the only company expected to go public this week on U.S. exchanges.

🚑 Anteris, an Australian maker of artificial heart valves that trades on the ASX (AVR), set terms for its Nasdaq float (AVR) to 14.8m shares at $6.78. axios.link/4itbokh

⚡ Flowco, a Houston-based provider of oil and gas well equipment and services, filed for an IPO that Renaissance Capital estimates could raise $300m. It plans to list on the NYSE (FLOC), and reports $58m of net income on $349m in revenue for the first nine months of 2024. Owners are Genesis Park and White Deer Energy. axios.link/3VRSCtx

• Kioxia, a flash memory chipmaker that Bain Capital carved out of Toshiba in 2018, priced the year's third-largest Japanese IPO in the middle of its planned range, giving it around a $5.2b valuation. axios.link/3Bnc1vd

• Shepherd Ave Capital Acquisition, a SPAC led by William Snyder (Daedalus Analytics International), raised $86m in its IPO. axios.link/3Spe86V

• Arthur J. Gallagher (NYSE: AJG) agreed to buy AssuredPartners, an Orlando, Fla.-based insurance broker, from Apax and GTCR for $13.45b. axios.link/41toRTd

⚡ GIC hired JPMorgan to advise on a possible sale of its 50% stake in India's Greenko Energy, a renewables firm that could be valued at around $10b, per Bloomberg. axios.link/4iu5PlA

• Macquarie Group is seeking to sell Macquarie Rotorcraft, a helicopter leasing business that could fetch around $1.2b, per Bloomberg. axios.link/4g475KH

• Trive Capital is weighing a sale of IPO for Karman Space & Defense, a Huntington Beach, Calif.-based maker of aerospace systems that could fetch between $400m-$500m, per Bloomberg. axios.link/3D8qWdi

• Enterprise Bancorp (Nasdaq: EBTC) agreed to merge with Rockland Trust parent company Independent Bank (Nasdaq: INDB) in a $562m cash-and-stock deal. axios.link/41J4923

🍷 Full Glass Wine, an Illinois-based DTC operator of wine brands, acquired both Wine Access and Cameron Hughes Wines, per Axios Pro. FGW backers include Shea Ventures and Cleveland Avenue. axios.link/4g4LoKC

• Goldman Sachs is exploring options, including a possible sale, of its ETF Accelerator platform, per Reuters. axios.link/3ZJJo4E

• SoftBank is paying $279.2m to buy Paytm's stake in PayPal (Nasdaq: PYPL). axios.link/3Vw2TLz

• Centana Growth Partners, a fintech-focused growth equity firm, raised $600m for its third fund. per Axios Pro. axios.link/4gm4Sdk

🚑 Dimension, a biotech-focused VC firm, raised $500m for its second fund. axios.link/3ZLhk0E

🚑 Jim Costanzo, former CEO of Nordic Consulting, joined Silversmith Capital Partners as a senior advisor. axios.link/3VtRfAS

• General Atlantic promoted Wilson Bowen and Scott Levine to managing directors, as part of a broad group of promotions.