Indeed. All film, including the movie film stock, is made by Kodak.
Alaris buys some of what they manufacture to sell for still photography, including the TMax-100, TMax-400, Tri-X 400, TXP 320 sheet film, Portra 160, Portra 400, and Ektar 100.
I think there was some confusion when Kodak stopped producing Tri-X 320 in 120 and 220 roll-film formats. Tri-X 400 is available in 35mm and 120, Tri-X 320 in sheet film formats.