Air Tractor Inc. is a United States aircraft manufacturer based in Olney, Texas. Leland Snow founded the company in 1978 in order to manufacture a new agricultural aircraft derived from the S-2B aircraft (designed by his previous company Snow Aeronautical). Designated Model AT-300 Air Tractor, the new aircraft first flew in 1973. In 2004 the 2000th Air Tractor aircraft was delivered.