June 29 was the Texas deadline for petitions for newly-qualifying parties, and for independent candidates. No one turned in a statewide petition. Four independent candidates for U.S. Senate had filed a declaration of candidacy earlier this year, but they did not submit a petition. None of the parties that submitted a declaration of intent to petition this year filed a petition either, for statewide status. It is possible some parties turned in a petition to be on the ballot in a single county or two.
Parties that didn’t need to petition, because they polled enough votes in 2010 to remain on, are the Democratic, Green, Libertarian, and Republican Parties.