INDIANAPOLIS, July 21, 2025 /PRNewswire/ -- Allison Transmission Holdings Inc. (NYSE: ALSN), a leading designer and manufacturer of conventional and electrified vehicle propulsion solutions and the largest global manufacturer of medium- and heavy-duty fully automatic transmissions for commercial and defense vehicles, today announced that it will hold its second quarter 2025 financial results conference call at 5:00 p.m. EDT on Monday, August 4, 2025. David S. Graziosi, Chair and Chief Executive Officer, G. ...