2026 Golf Majors — Clark at the U.S. Open, Fox at The Open

Wyndham Clark won the 2026 U.S. Open at Shinnecock Hills Golf Club, closing at 4-under to finish one clear of Sam Burns. Clark led wire-to-wire—carrying a six-stroke cushion into Sunday and grinding out par after par to hold off the charge—becoming the 24th multiple U.S. Open champion, adding to his 2023 title at Los Angeles Country Club. The USGA's $22.5M purse paid him $4.5M.

This workspace is the cross-exchange record of how the books priced the major. Kalshi's full-field winner Categorical (KXPGATOUR-USO26) resolved Clark; the pie below preserves the final implied distribution it carried into Sunday, alongside the Round 1 leader Categorical and the season-long majors context. Polymarket's outright winner book has since been delisted, which is itself the story of golf on prediction markets—the depth lived on one venue.

Winner: Wyndham Clark (−4), by one over Sam Burns.
Venue: Shinnecock Hills Golf Club, Southampton, NY—its sixth U.S. Open.
Settled: June 21, 2026.

Kalshi's KXPGATOUR-USO26 was the deepest U.S. Open winner book this year; the pie shows the full field with no count cap, so the long tail behind Clark stays visible. Polymarket ran a parallel outright book that also resolved Clark, but it has since been delisted and no longer renders—Kalshi's record is what survives.

The Round 1 leader Categorical settled after Thursday's round—it was the cleanest first-mover tell, repricing on every morning low score and converging as the afternoon wave finished.

Kalshi's KXPGAMAJORWIN-26 priced who would bank a PGA major across the full 2026 season. With Ryan Fox's win at The Open closing the calendar, the Multiple has settled and the pie below is the final record of how the season's major-winner distribution resolved. The settled U.S. Open field Multiple sits beside it.

• Single-venue depth. Kalshi and Polymarket both ran winner books into Sunday, but only Kalshi's survives as a queryable record. Golf majors are the clearest case on the board of a category where one exchange carries essentially all the durable liquidity.
• Wire-to-wire convergence. The history chart shows the outright book tightening onto Clark from Thursday's lead through the six-shot Sunday cushion—a rare front-runner hold at a U.S. Open.
• The season is closed. Kalshi's KXPGAMAJORWIN-26 has settled now that The Open is in the books, and Scottie Scheffler's majors-count Cumulative resolved with it. Both are preserved here as the season-level record rather than a live view.
• Kalshi owned the majors franchise. The Open turned over roughly $40M in 24-hour volume on Kalshi with no meaningful Polymarket or Manifold mirror.

Ryan Fox won the 2026 Open Championship on July 19, closing the season's fourth and final major. Kalshi's KXPGATOUR-THOC26 was the deepest golf book of the year at roughly $40M in 24-hour volume around settlement, and it carried no meaningful Polymarket or Manifold mirror—the pie below preserves the full field with no count cap, so the price the market put on an outsider before he closed it out stays visible.