According to a regulatory filing Thursday by Tempe, Ariz.-based US Airways, the new company would be known as American Airlines Group Inc. The name would replace AMR "immediately after the effective time of the merger," the filing stated. In announcing their merger agreement Feb. 14, American CEO Tom Horton said the new carrier would be called AMR Corp. and operate under the American Airlines name. "Our filing speaks to our understanding," John McDonald, a US Airways spokesman, said in an email when asked about the name. "Can't really expound beyond that." Horton "must have just misspoke" in a conference call on the merger last week, Mike Trevino, an American spokesman, said in an emailed statement. Trevino confirmed the new name. An AMR spokeswoman told the Tulsa World last week that the name of the new company would be American Airlines Group. It would be based in Fort Worth, currently the location of AMR's headquarters.