Microsoft's Twin AI Infrastructure Plays in Europe and the US Face an Earnings Reckoning

Microsoft deepens Mistral AI partnership in Europe, taps AMD for US Helios racks, as Q4 capex forecast tops $42B ahead of July 29 earnings.

Microsoft has placed a pair of ambitious bets on artificial intelligence infrastructure in quick succession, expanding its cloud footprint on both sides of the Atlantic even as a securities class action from January's steep sell-off hangs over the stock. The software giant deepened its partnership with French AI lab Mistral AI in a multi-billion dollar deal to deploy thousands of NVIDIA Vera Rubin graphics processors across European data centers, while simultaneously tapping AMD for its Helios rack system destined for Azure's US facilities. The moves underscore how aggressively Microsoft is committing capital — analysts expect fourth-quarter capital expenditure to top $42 billion, a 74% year-over-year surge — to maintain its position in the cloud AI race.

The Mistral expansion, announced jointly by Microsoft President Brad Smith and Mistral CEO Arthur Mensch, integrates the Mistral Medium 3.5 and OCR 4 models into Microsoft Foundry, with Medium 3.5 also landing in Copilot Studio. Medium 3.5, boasting 128 billion parameters and a 256,000-token context window, will be delivered via Azure Local across three deployment modes — full cloud, cloud-connected, and fully offline — targeting regulated industries such as finance, healthcare, and manufacturing. Smith said the deal addresses European clients' need for advanced AI without surrendering data control. Roughly two-thirds of Mistral's existing customers already work with Microsoft, easing integration costs. No new equity investment was made; Mistral separately pursues a €3 billion funding round at a €20 billion valuation. The tie-up also benefits from a US decision to temporarily suspend Anthropic models for foreign customers, giving European alternatives a tailwind.

Across the hardware aisle, Microsoft and AMD on July 20 announced a partnership centered on AMD's new Helios rack system, equipped with Instinct MI455X accelerators, EPYC Venice processors built on the Zen 6 architecture, Pensando networking chips, and the ROCm software stack. Deliveries begin in the second half of 2026, initially targeting AI inference workloads on Azure. Alongside this, Microsoft unveiled two new instance families: HDv2, with roughly 500 CPU cores, 4 terabytes of RAM and 32 terabytes of SSD storage for agent-based AI applications, and HXv2, packing 176 Zen 6 cores running above 5 gigahertz for semiconductor design tasks. The AMD deal joins an existing roster of infrastructure efforts and comes as Microsoft's annualized AI revenue has reached $37 billion, up 123% year-over-year, with a commercial remaining performance obligation of $627 billion.

Both partnerships face their first major test on July 29, when Microsoft reports fiscal fourth-quarter earnings for the period ending June 30. Consensus calls for revenue between $86.7 billion and $87.8 billion, with Azure growth in the 39% to 40% range on a constant currency basis and more than 20 million paying Copilot users. Bank of America pegs revenue at $87.4 billion and earnings per share at $4.24, while Deutsche Bank comes in at $87.62 billion and the same EPS figure, noting the stock trades at 20 times forward earnings — well below its five-year average of 29. Morgan Stanley rates Microsoft Overweight with a $600 target, and the broader analyst consensus is a Strong Buy with a mean price target of $558.86 and a range of $400 to $680.

Yet the positive infrastructure narrative is tempered by a class action lawsuit filed July 7 before the US District Court for the Western District of Washington (case 26-cv-02071). The suit alleges securities fraud over statements about Copilot adoption and Azure growth during the period from May 1, 2025 to January 28, 2026. It stems from a roughly 10% stock drop on January 28, when shares fell from $481.63 to $433.50 after quarterly results disappointed; the Wall Street Journal later reported Copilot had only 15 million premium subscribers, below expectations. The complaint names CEO Satya Nadella, CFO Amy Hood, marketing chief Jared Spataro, and cloud and AI EVP Rajesh Jha as defendants. Law firms Bronstein, Gewirtz & Grossman, along with Bleichmar Fonti & Auld and Levi & Korsinsky, are representing shareholders, who have until August 11, 2026 to apply as lead plaintiff.

The stock has since recovered from its January trough but remains well below its October 2025 all-time high. After closing Monday at €352.55 — a 2.37% gain that brought it within 6.23% of its 200-day moving average — shares slipped to €349.85 in Tuesday's session, down 0.77%. That leaves them 26.82% below the 52-week high of €478.10 reached late last October. Analysts remain broadly bullish: Bank of America has a $500 buy target, Deutsche Bank sees $550 with annual earnings growth above 15%, and an independent assessment pegs fair value at $466, suggesting the stock is roughly 14% undervalued against an operating margin near 46%. Whether that valuation gap narrows may hinge on the cloud growth numbers and the legal proceedings unfolding in parallel.