Utah will hold a special U.S. House election on November 21 to fill the vacancy in the Second District. Filing closed on June 14. Five parties will have nominees: Republican, Democratic, United Utah, Libertarian, and Constitution. Also there are two independent candidates, each of whom needed 500 signatures. See this story. Thanks to Thomas Jones for the link.
Parties in which there are more than a single candidate are Republican, Democratic, and United Utah. Those parties will hold conventions in the next few weeks to choose their nominees. If the convention process doesn’t choose a nominee, then special primaries will be held on September 5.