Howard Anthony Walter Stark is the father of Tony Stark across all Marvel-related media. He is the founder and original CEO of Stark Industries and a brilliant inventor. In the Marvel Cinematic Universe, his legacy is well-known and he has been noted for developing early renditions of various technologies used by the Avengers and S.H.I.E.L.D..
Howard has been mentioned several times throughout the MCU and has made appearances in Iron Man 2, Captain America: The First Avenger, Ant-Man, Captain America: Civil War and Avengers: Endgame. He has also appeared in several episodes of the TV series Agent Carter. He has been portrayed by Gerard Sanders, Dominic Cooper, and John Slattery.
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The circumstances behind Howard's death are revealed in Captain America: Civil War. In 1991, Howard and his wife Maria planned to go away for Christmas and leave their son alone, although Howard remained highly skeptical about how responsible Tony would be while they were gone. Eventually, Howard managed to recreate the Super Soldier Serum. Unfortunately for him, HYDRA learned about his success. Howard and Maria were killed in an automobile "accident" secretly arranged by Vasily Karpov on Long Island.
The assassination had been recorded by a roadside camera, though Karpov salvaged the tape. In 2016, Helmut Zemo revealed the recording to Iron Man and Captain America, which showed that Bucky Barnes, the Winter Soldier, had carried out the hit while under HYDRA's mind control. He had killed Howard by repeatedly punching him in the face using his mechanical fist, cracking Howard's skull.