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Large Kalshi fills put both sides of Petroski market in focus

BotForKalshi lists the fill among the largest recent single trades on Kalshi, with the taker buying the Yes side, in exchange data as of 2:57 PM Pacific on November 7. A second fill on the same market took 26,058 contracts on the opposing fighter at 99 cents for 25,797 dollars.

Two large fills on Kalshi’s Andre Petroski fight market involved purchases on opposite outcomes, according to BotForKalshi. One was a 27,000-contract trade on Petroski to win at 99 cents, valued at 26,730 dollars.

BotForKalshi ranked that transaction among the largest recent single trades on Kalshi. The taker bought the Yes side, according to its account of exchange data as of 2:57 PM Pacific on November 7.

Opposing outcome also draws a large fill

A second fill in the same market involved 26,058 contracts on the opposing fighter at 99 cents, for a reported 25,797 dollars. The supplied summary does not identify that fighter.

The report was published on Nov 7, 2026, at 6:00 PM ET. It gives no execution times for the individual fills, leaving their sequence and the interval between them unspecified.

What it means for prediction markets

  • The 27,000-contract Petroski purchase stands out by single-fill size, according to BotForKalshi’s ranking; it does not establish total market volume.
  • Both reported fills occurred at 99 cents, but on opposing outcomes. Without their execution times, they should not be treated as simultaneous pricing signals.
  • The report identifies the Petroski trade as a taker purchase of Yes contracts. It provides no trader identities or motives for either fill.
KalshiInfiniti MarketsInfiniti Signals

Sources & attribution

Published
  1. Source
    BotForKalshi
    Publisher
    The publisher did not list a web address.
    Source URL
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