Kalshi's $40B Round Leaves DraftKings and Flutter Below It — and Forces the IPO Question

Kalshi is in advanced discussions for roughly $1B of fresh equity at a roughly $40B post-money valuation, with Tiger Global Management and Dragoneer Investment Group negotiating to participate, Reuters reported on Sept. 29, 2026. Existing backers Sequoia Capital and Wellington Management are in talks to co-lead the round, which sources say could close in the coming weeks. The tag would mark an 82% lift over the $22B Series F that closed in May 2026 and roughly 8x the $5B post-money from the October 2025 Series D.

Tiger Global brings a late-stage growth playbook built on Stripe, ByteDance, and Meta, while Dragoneer adds a long-duration public-markets lens from Snowflake, Atlassian, and Coinbase. Their willingness to underwrite a near-doubling in five months effectively endorses Kalshi's pivot from event contracts into CFTC-regulated perpetual futures, the product line launched with Coinbase on May 29, 2026 that Kalshi's CEO Tarek Mansour has called \"the most significant product expansion since event contracts.\"

Kalshi has run eight priced rounds since June 2025, raising cumulative equity of roughly $2.8B while pushing its post-money from $2B to roughly $40B. Each round has cleared within weeks, with the gap between the December 2025 Series E ($11B) and the May 2026 Series F ($22B) shrinking to five months, and the gap from May to September shrinking to four. The ladder reflects both revenue ramp and a private-market premium that no listed peer matches.

The compounding is the story. Each round has cleared at ~2x the prior mark on average, a pace that would compress any IPO discount and that almost certainly embeds a partial sale of secondary in the latest checks.

Kalshi is fundamentally a fee-on-volume exchange, and the volume stack has compounded nearly vertically since sports markets fully opened. Monthly volume moved from $226M in December 2024 to $6.6B in December 2025, $16.8B in May 2026, and $30B in June 2026, with a personal record of more than $1B traded on Super Bowl Sunday, the company said. The Sacra research note in July 2026 estimated annualized revenue at roughly $4B, up from $735M in December 2025 and approximately $25M in December 2024.

Fee revenue ran at roughly 1.2% of trading volume across 2025, but the mix has tilted sharply. Sports contracts contributed 89% of fee revenue in 2025 and \"well above 90%\" by year-end, and that dependence has intensified rather than diluted. The May 2026 launch of CFTC-regulated crypto perpetual futures — a product line that Kalshi says it built with Coinbase — added another fee vector: perps hit $17.98M in daily volume by August and contributed roughly $7B of the $30B June total, currently at zero customer fees to seed liquidity. Sports contributed another $7B during the FIFA World Cup window in the same month.

Polymarket is the only true head-to-head competitor, and the September round widens Kalshi's lead to roughly 2x on valuation for the first time. Polymarket cleared an August 31, 2026 Series D at a $21B post-money led by 1789 Capital — Donald Trump Jr.'s vehicle put in $300M on top of an earlier $200M check and took an advisory seat, per coverage of the filing. Intercontinental Exchange had previously closed a $600M direct cash investment in March 2026, bringing ICE's total stake toward $2B and giving Polymarket a NYSE-parent distribution backstop.

The gap is widest where Kalshi is most regulated. Kalshi holds a CFTC Designated Contract Market license that lets it operate event contracts across all 50 US states today; Polymarket re-entered the US in 2026 through its acquisition of QCX and is still rebuilding its US footprint. Polymarket's $4.8B of contracts traded over Aug 29–Sep 27, 2026 looks respectable in isolation but represents only about 6% of prediction-market volume in that window — versus Kalshi's 83% — a gap that has been widening every month since the World Cup peak.

The public sportsbook complex trades at fractions of Kalshi's implied valuation despite comparable or larger revenue bases. DraftKings closed at $19.59 on Sept. 28, 2026 with a $9.7B market cap, TTM revenue of $6.22B, and a forward P/E of 12.6x, per company overview data; Flutter traded at $75.07 for a $13.0B cap on $17.16B of TTM revenue; MGM Resorts, which owns half of BetMGM, sat at $8.0B on $17.76B of revenue. The simple math: Kalshi at $40B is roughly 4x DraftKings, 3x Flutter, and 5x MGM on market cap — and trades at roughly 10x annualized revenue versus DraftKings' 1.6x, Flutter's 0.8x, and MGM's 0.5x.

The peer compression is structural. Listed sportsbooks carry state-by-state gaming licenses, age and tax overhead, and a heavy promotional spend that has weighed on margins — DraftKings' TTM revenue actually fell 5% in Q2 2026 on player-friendly sports outcomes, and Flutter cut its 2026 EBITDA guidance by $210M to $2.655B at the August 5 print. Kalshi trades on a different axis: it's a CFTC-regulated DCM with a national footprint, a broker-channel distribution layer, and a perpetual-futures option that no listed sportsbook can replicate without stepping outside its state license.

Three distribution rails explain why Kalshi's volume compounds and why the latest round looks defensible at $40B. Robinhood runs the consumer rail, Coinbase runs the pro-crypto rail, and the institutional broker / prime-broker push runs the hedge-fund rail.

Robinhood is the single most important external driver of Kalshi's revenue line, and its $156M Q2 event-contract take now overtakes crypto trading revenue at the broker — a fact that fully explains the 32% jump in total net revenues reported in August. The structural risk is symmetric: if Robinhood ultimately spins up its own prediction-market exchange (as trading desks have telegraphed since November 2025), Kalshi's distribution moat narrows overnight. The new round's investors are buying the bet that Robinhood won't.

The $40B tag is conditional on Kalshi holding its CFTC-regulated status. A federal appeals court ruled in April 2026 that the CFTC has exclusive jurisdiction over sports event contracts, but on Sept. 13, 2026 a separate court ruled that prediction markets operate as gambling rather than federally regulated trading — sending DraftKings and Flutter shares up on the day. New Jersey has petitioned the Supreme Court to let states regulate sports betting on prediction markets, and a bipartisan Senate bill introduced in March 2026 would amend the Commodity Exchange Act to ban sports and casino-style contracts outright.

The CFTC's June 2026 proposed rulemaking and Chairman Michael Selig's January 2026 withdrawal of an earlier outright ban both signal the regulator is trying to write a perimeter that lets prediction markets live but constrains the sports tail. That ambiguity is precisely what the new round's investors are underwriting.

Late-stage private rounds at this velocity typically front-run an IPO by 12–18 months, and Kalshi's CEO Mansour has publicly framed event contracts as a potential trillion-dollar market. Reporting in August 2026 pointed to a 2027 listing window; the new round, if it closes on the terms reported, would push the IPO conversation to early 2027 to consolidate the late-2026 mark before a public bid. Every month Kalshi raises privately at $40B is a month the IPO discount compresses — but also a month that exposes more private-paper holders who will need a public exit.

The investors who matter most are Coinbase (mcap ~$51.5B at $195 a share on Sept. 28, 2026) and the listed sportsbooks: every product decision on the perps rail will be benchmarked against Coinbase's multiple, and every regulatory outcome on sports contracts will be benchmarked against DraftKings' and Flutter's recovery. The $40B tag forces all of those comparisons to start from a higher base than the listed market is prepared to defend.