VC Funding Top Ten — September 12, 2026: AI Frenzy, Defense Tech, Mega-Rounds

Overview

Saturday, September twelfth. Today's biggest check is a massive three-point-two billion dollars for French AI champion Mistral AI, pushing its valuation to nearly twenty-three billion. It's the headline in a torrent of capital flooding the AI sector, as investors place enormous bets on the future of intelligence. We'll

In this show

• Saturday, September twelfth. Today's biggest check is a massive three-point-two billion dollars for French AI champion Mistral AI, pushing its valuation to nearly twenty-three billion. It's the headline in a torrent of capital flooding the AI sector, as investors place enormous bets on the future of intelligence. We'll break down the day's ten biggest deals, from autonomous weapons to a major SaaS acquisition. With me today are our Markets and World analysts. Let's get into the numbers.
• Here is today's snapshot. Across the top ten rounds, venture funds disclosed a total of eleven-point-three-two billion dollars. The largest round, as mentioned, was Mistral AI's three-point-two billion Series D. The hottest category was undeniably AI, accounting for five of the top ten deals. In M&A, the big news is Bending Spoons' move to acquire Miro for one-point-three-six billion dollars. The story of the day remains the deluge of capital into AI, with Mistral and Cognition alone raising a combined five-point-two billion.
• Let's start with that number one deal. Mistral AI locked in approximately three-point-two billion dollars in a Series D, reaching a staggering twenty-two-point-six billion dollar post-money valuation. The round was co-led by Samsung Electronics, Scaleup Europe Fund, and PSG Equity. This marks the largest-ever equity fundraising for a European tech company. It firmly positions Mistral, known for its open-weight AI models, as a sovereign European challenger to the dominant US AI giants, creating a new pole in the global AI power structure.
• At number two, The Boring Company raised a three billion dollar Series D, pushing its valuation to twenty-three billion. The round was led by the United Arab Emirates. This funding quadruples the company's 2022 valuation and is directly tied to a massive infrastructure commitment: building over one hundred fifty kilometers of its underground Loop tunnels in the UAE. This isn't just a venture investment; it's a strategic nation-building project, signaling a deep partnership between Elon Musk's firm and the Gulf state to reshape urban transportation.
• The AI funding frenzy continues at number three with Cognition. The developer of 'Devin,' the autonomous AI software engineer, raised a two billion dollar Series E co-led by Andreessen Horowitz and Accel. This sends its valuation soaring to an incredible forty-eight billion dollars. The reason for the hype is pure performance: the company's valuation has nearly doubled in just four months. This growth is fueled by annual recurring revenue that has surged from four hundred ninety-two million to nearly nine hundred million dollars in that same short period.
• At number four, a major strategic shift from Motive, the AI-powered platform for physical operations. The company raised a one-point-three billion dollar growth round led by General Catalyst. But the bigger story is that alongside this massive financing, Motive has officially withdrawn its IPO filing. This signals a deliberate choice to sidestep the public markets and instead use this private capital to double down on AI-driven growth. It's a bet that staying private longer will allow for more aggressive innovation in fleet management and driver safety.
• The AI hardware arms race is heating up. At number five, Positron AI raised eight hundred seventy-five million dollars in a Series C, catapulting its valuation to five billion dollars. The round saw participation from NEA, Jim Clark, and others. Positron builds hardware and software to make AI inference—the process of running models—cheaper and more energy-efficient. This funding quadruples the company's valuation in just seven months. It's a massive vote of confidence from investors in its unique, memory-focused approach to building the next generation of AI chips.
• Investor interest in defense technology is intensifying. In sixth place, Mach Industries secured a six hundred million dollar Series C extension, more than doubling its valuation to three-point-seven billion dollars in just three months. The round was led by Ribbit Capital and Sequoia, among others. Mach develops and manufactures autonomous weapons systems, including unmanned aircraft and long-range strike platforms. This rapid and substantial funding highlights a major shift in venture capital, with top-tier firms now aggressively backing startups in the national security sector.
• Vertical AI continues to command premium valuations. At number seven, Harvey, the generative AI platform for the legal industry, raised five hundred fifty million dollars in a late-stage round. This pushes its valuation to fifteen-point-five billion dollars. The round, led by Lightspeed and Diffusion, comes as Harvey's valuation has surged by over forty percent in just six months. Fueling this investor confidence is explosive growth, with the company's annual recurring revenue now exceeding four hundred million dollars as law firms rapidly adopt its technology.
• Coming in at number eight is another defense tech player, Covenant, which emerged from a two-year stealth period with a major announcement. The company has raised a cumulative two hundred fifty million dollars across its Seed, Series A, and Series B rounds, achieving a valuation over one billion dollars. Covenant is developing a long-range cruise missile system called Anthem, designed for mass production at a lower cost than legacy systems. Critically, it's not just a plan; the company has already booked approximately one hundred fifty million dollars in orders.
• Rounding out the list are two notable deals. At number nine, Cylake, an AI-native cybersecurity platform, raised a two hundred forty-five million dollar convertible note before its product has even reached beta. It’s a huge bet on the founding team. And at number ten, we have a major M&A event: Bending Spoons is acquiring the collaborative whiteboard platform Miro for one-point-three-six billion dollars. This price represents a steep ninety percent discount from Miro's seventeen-point-five billion dollar valuation in early 2022, a stark reflection of the market correction for high-flying SaaS companies.
• Looking ahead, the one thing to watch is the AI Hardware Arms Race. This week's huge fundraise for Positron AI underscores a critical battleground. Beyond the large language models themselves, the specialized hardware that powers them is attracting immense investment. The fight for computational supremacy is just beginning. Expect to see more large, capital-intensive rounds for companies developing novel chips and infrastructure, as the global demand for processing power continues to far outstrip supply. We'll be back tomorrow afternoon at three PM Pacific with the next deal flow.