CM Punk has won several major titles, so the answer depends on which reign you mean, but his most iconic first WWE Championship win came when he beat John Cena at Money in the Bank 2011.

Key CM Punk title wins

  • First WWE Championship (2011):
    Punk defeated John Cena at the Money in the Bank 2011 pay-per-view in Chicago, leaving through the crowd with the WWE Championship in one of the most famous finishes of the PG Era.
  • First World Heavyweight Championship (2008):
    Punk cashed in his Money in the Bank contract on Edge on the June 30, 2008 episode of Raw, pinning him to win his first World Heavyweight Title.
  • ECW Championship (2007):
    Punk captured the ECW Title by defeating John Morrison on the September 4, 2007 episode of ECW in a “last chance” match.

If you tell which belt or year you mean (WWE, World Heavyweight, ECW, or the recent World Heavyweight run), more specific detail can be given about that exact title win.