Kalshi Series G raises $1 billion at a $40 billion valuation
Kalshi raised $1 billion in a Series G at a $40 billion post-money valuation, co-led by Wellington and Sequoia, as it pushes beyond event contracts into a broader exchange.
Prediction markets just got another private-market stamp. The Kalshi Series G raised $1 billion at a $40 billion post-money valuation, roughly doubling the $22 billion mark from May, the company said Thursday.
What happened
Wellington and Sequoia co-led the round. Kalshi's own post listed Baillie Gifford, Stripes, Andreessen Horowitz, Coatue, Layer Global, Morgan Stanley Investment Management, Sequoia Global Equities, CapitalG, Hudson River Trading and Balyasny among the co-investors.
Kalshi said non-sports annualized revenue now exceeds $1 billion, overall annualized trading volume tops $1 trillion, more than 30 million accounts have been created and the venue accounts for over 75% of prediction-market trading volume. CNBC noted the firm wants the capital for leveraged event contracts, single-stock perpetual futures and compute markets, plus more institutional coverage.
The raise lands while Kalshi still faces state-level sports-contract fights and a likely Supreme Court reckoning, even as midterm markets and sports combos have powered volume.
Kalshi said institutional clients, excluding market makers, already represented about 25% of volume as of September, with roughly 500 institutional entities on the platform. That mix is what private-market investors are underwriting at $40 billion.
Kalshi's jump from a $5 billion valuation in late 2025 to $40 billion now is one of the steepest private-market re-ratings in fintech. It prices both midterm volume and the option that prediction markets become a durable exchange category, not a cycle trade.
Why it matters
The Kalshi Series G is a bet that event contracts are a beachhead, not the whole business. That ambition collides with legal overhangs such as the Utah Kalshi criminal charges and with industry growth already visible in the prediction markets Q3 volume print.
A $40 billion private tag also raises the bar for any 2027 IPO talk Mansour has floated on CNBC.
Expanding into single-stock perpetuals and compute markets would put Kalshi in more direct competition with crypto venues and traditional futures complexes, not only with Polymarket.
What's next
Product launches and the sports-contract court path will decide whether the valuation holds. Kalshi's Series G announcement is the primary source. The Kalshi Series G gives the exchange a war chest just as election week volume arrives.
Court outcomes on sports event contracts remain the swing factor that a billion dollars of equity cannot paper over.
Private valuations in prediction markets now price a future where event contracts, sports, and perpetuals sit on one exchange stack. That vision needs legal clarity on sports and durable institutional flow, not only another growth round.
How quickly those new products clear compliance review will decide whether the $40 billion valuation tag looks visionary or premature into 2027.
Investors will also watch whether sports-contract court risk caps the multiple even as non-sports revenue scales.
This article is for information only and is not investment advice.