According to the June 5, 2023 edition of the Seattle in 2025 Worldcon Bid newsletter, the Seattle bid to hold the 2025 Worldcon August 13-17, 2025 at the Seattle Convention Center was the only bid filed with the Chengdu 2023 Worldcon committee before the filing deadline. This means that Seattle will be the only bid listed on the ballot. Write-in bids can file up until the end of the election, which will take place at the 2023 Worldcon in Chengdu, China.
Seattle has posted their filing documents on their web site.