The 2026 Megaround League Table

Nine financings above half a billion dollars closed, extended or surfaced in public reporting between Jan. 1 and Sept. 4, 2026, and the largest single one — OpenAI's $122 billion spring round — dwarfs the annual venture output of entire countries ¹. Sam Altman's company topped the list; Dario Amodei's Anthropic sat second with a round that tripled its own valuation inside three months; and a founder-scientist tier that raised billions on reputation alone in 2025 largely sat out 2026's parade. Ranked by capital committed, the year's league table tells a story sharper than any single headline: money concentrated at the frontier, and the middle tier scrambled for scraps measured in the hundreds of millions.

OpenAI and Anthropic Rewrite the Scale

Ambition compounded fastest at the top. OpenAI opened 2026 by raising $110 billion at a $730 billion post-money valuation in February, led by Amazon at $50 billion, SoftBank at $30 billion and Nvidia at $30 billion; the round grew to $120 billion by March and closed at $122 billion in committed capital by April, pushing the valuation to $852 billion ¹. Masayoshi Son's SoftBank and Jensen Huang's Nvidia returned as repeat backers of a company both already supply with compute and cash simultaneously, a structure that blurs customer and investor into a single relationship. Amazon's stake marked a newer entrant to OpenAI's capital table, joining a cloud rival's balance sheet to a company AWS increasingly treats as both client and competitor.

Anthropic answered in kind, twice. Feb. 12 brought a $30 billion Series G at a $380 billion post-money valuation; by May, a second round raised $65 billion and pushed the figure to $965 billion, led by Brad Gerstner's Altimeter Capital, Marc Stad's Dragoneer Investment Group and Sequoia Capital, where growth partner Pat Grady has anchored the firm's frontier-model bets for three years running ². Valuation climbed two and a half times in fifteen weeks — a pace that treats quarterly funding cycles as the new normal for a company still years from any conventional profitability benchmark. August brought a further wrinkle: Anthropic struck a cloud-computing agreement with Nscale reportedly worth roughly $45 billion, a commercial contract rather than equity, yet one large enough to rival most companies' entire funding history in a single line item ².

A Merger Sets Its Own Marker

xAI supplied 2026's strangest capital event, pricing itself through a merger filing that skipped the usual funding term sheet entirely. Elon Musk folded xAI into SpaceX on Feb. 2 through an all-stock transaction, valuing xAI at $250 billion, SpaceX at $1 trillion and the combined entity at $1.25 trillion ³. Analysts tracking megarounds face a genuine classification puzzle here: a merger sets a valuation exactly the way a funding round does, minus new outside capital arriving to test that number against market appetite. Musk's structure let xAI claim frontier-lab scale through corporate arithmetic, sidestepping the investor scrutiny that forced Anthropic and OpenAI to defend their multiples to dozens of institutional backers apiece.

The Enterprise Platform Joins the Club

Databricks proved a data-infrastructure company could match frontier-lab fundraising velocity. Ali Ghodsi's firm closed a first tranche of $3 billion in July, led by Coatue Management's Philippe Laffont at a $188 billion valuation, then extended the round to $5 billion total by August at a $190 billion post-money figure, joined by Blackstone, MGX, T. Rowe Price and Sixth Street Growth ⁴. The same August disclosure cited a $7 billion annualized revenue run rate — a real commercial engine underneath the valuation, distinct from the pre-revenue bets defining much of this list. Coatue's return as lead investor across successive tranches signals a firm willing to concentrate exposure rather than diversify it, a strategy paying off so far given the valuation's steady climb between close dates. Revenue backed the story throughout: Databricks reported a $5.4 billion annualized run rate on Feb. 9, growing more than 65% year over year, then $6.9 billion by June 16 at an 80% growth clip ⁴. Few names on this league table can point to comparable, disclosed commercial traction underneath a nine-figure round.

The Mid-Tier Scramble

Below the trillion-dollar tier, 2026's rounds shrank by orders of magnitude while staying enormous by any pre-2024 standard. Arthur Mensch's Mistral AI raised $830 million in March to build datacenters near Paris and in Sweden, a capital-intensive infrastructure play distinct from the model-training rounds that built its earlier valuation ⁵. Jonathan Ross's Groq sought $650 million in May through a pro-rata offering backstopped by existing investors Disruptive and Infinitum, funding a strategic pivot toward inference-cloud services rather than chip sales alone ⁶. Arvind Srinivas's Perplexity crossed a $21.21 billion valuation through an early-2026 Series E-6, though the company kept round size and lead investor undisclosed ⁷. Misha Laskin and Ioannis Antonoglou's Reflection AI pursued investors at a valuation exceeding $20 billion by March, roughly two and a half times the $8 billion mark it carried after an October 2025 round ⁹.

Who Sat Out

Silence carries its own signal. Ilya Sutskever's Safe Superintelligence, still valued near $32 billion off an April 2025 round, left its equity story untouched through Sept. 4, opting instead for a July 27 partnership with Nvidia worth roughly $5 billion, a structure built around compute access, distinct from a priced round with outside lead investors ⁸. Sutskever's public framing treated the deal as validation of patience: access to Nvidia's Vera Rubin platform would let SSI's research scale "by an order of magnitude," he said, an ambition measured in silicon over fresh term sheets ⁸. Mira Murati's Thinking Machines Lab, which closed a $12 billion-valuation round in July 2025, sits absent from every 2026 fundraising tracker this reporting could locate — a striking gap for a company whose founder departed OpenAI amid comparable fanfare eighteen months earlier ¹⁰. Whether that reflects investor caution after a well-documented founding-team exodus or simple timing ahead of a later round, the market's largest checks flowed elsewhere in 2026.

By the numbers

• $122 billion: OpenAI's committed capital by April 2026, at an $852 billion post-money valuation ¹.
• A two-and-a-half-fold climb: Anthropic's valuation growth from $380 billion in February to $965 billion by May ².
• $1.25 trillion: combined valuation of xAI and SpaceX after their Feb. 2, 2026, all-stock merger ³.
• Five billion dollars: Databricks' total Series M, closed across July and August at a $190 billion valuation ⁴.
• $830 million: Mistral AI's March 2026 raise for European datacenter buildout ⁵.
• A $650 million pro-rata round: Groq's May 2026 raise, backing its inference-cloud pivot ⁶.
• $21.21 billion: Perplexity's valuation after an early-2026 Series E-6 ⁷.
• Roughly $5 billion: Nvidia's reported July 2026 investment in Safe Superintelligence, structured around compute access ⁸.

What to watch

OpenAI confirmed on June 8 that it filed for an initial public offering with the Securities and Exchange Commission, keeping terms, timeline and price range undisclosed alongside the filing itself ¹. Anthropic's own path toward a public listing, reported separately, will determine whether 2026's private-market marks survive daily trading, where valuations answer to a market of millions rather than a syndicate of growth investors. Thinking Machines' silence on new capital bears close attention: a founder-scientist lab skipping an entire funding year, following a well-publicized talent exodus, offers an early test of whether reputation alone still commands nine-figure checks. Databricks' revenue-backed valuation gives 2026's crop of enterprise infrastructure plays a template other late-stage companies may race to match before year-end.

Sources

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10. Reuters, "Mira Murati's AI startup Thinking Machines valued at $12 billion in early-stage funding," Reuters (via TradingView), July 15, 2025, https://it.tradingview.com/news/reuters.com%2C2025%3Anewsml_L4N3TC1L6%3A0-mira-murati-s-ai-startup-thinking-machines-valued-at-12-billion-in-early-stage-funding.