Mike Derry leads the Calgary-Shaw by-election market at 83.5% implied probability due to the United Conservative Party's longstanding dominance in the south Calgary riding, where the party secured comfortable margins in the 2023 provincial election before Rebecca Schulz's resignation prompted the contest. Derry won the UCP nomination in June with strong internal support and full backing from Premier Danielle Smith, positioning him as the clear frontrunner ahead of the September 14 vote. Opposition candidates, including NDP's Kyle Campbell at 13%, face steep structural barriers from the riding's voter base and UCP organizational strength. Minor-party entrants such as Liberal leader John Roggeveen and Progressive Tory Kyle Joseph register negligible probabilities, consistent with historical patterns in similar Alberta by-elections. No major late developments have altered this positioning.