Justin Hammer
Justin Hammer Art by Ron Lim
Publication information
Publisher	Marvel Comics
First appearance	Iron Man #120 (March 1979)
Created by	David Michelinie (writer) Bob Layton (writer) John Romita Jr. (artist)
In-story information
Species	Human
Place of origin	Surrey, England
Team affiliations	Hammer Industries
Abilities	Genius-level intellect Expert strategist

Justin Hammer is a fictional character appearing in American comic books published by Marvel Comics. The character is depicted as a villainous entrepreneur, head of Hammer Industries and a frequent adversary of the superhero Iron Man. He is the reason why many of Iron Man's supervillain enemies have access to extremely advanced technology and why these foes use their equipment for violent crimes instead of profiting by bringing the designs to market. These villains are his underworld mercenaries, secretly armed and contractually obliged to fulfill missions against Hammer's competitors and enemies, such as Tony Stark.

Sam Rockwell portrays the character in the Marvel Cinematic Universe (MCU) film Iron Man 2 (2010),^[1] the Marvel One-Shot direct-to-video short film All Hail the King (2014), and the second season of the animated television series What If...? (2023).

This section needs expansion. You can help by adding to it. (December 2012)

Justin Hammer first appeared in Iron Man #120 (March 1979), and was created by David Michelinie, John Romita Jr., and Bob Layton.^[2][3] Layton himself recalled in a 2014 interview that he and Michelinie originally created Hammer as the cautionary tale of what kind of person Tony Stark might have become if he stayed on his path as a global war profiteer, as well as a tribute to actor Peter Cushing; in Layton's words, Stark and Hammer are essentially in the same line of work, but with diametrically opposed moral views.^[4]

Justin Hammer was born in Surrey, England and later became a citizen of Monaco. A rival of industrialist Tony Stark (Iron Man), multi-billionaire businessman Hammer later became a criminal financier through unethical methods whilst using his company Hammer Industries as a front.^[5] In exchange for fifty percent of the crime profits, he would pay bail for costumed criminals and finance the development and replacement of both their weaponry and equipment. In the event that a mercenary under his employ violated his contract, Hammer would send an enforcement unit (usually led by his most reliable supervillain employee Blacklash) to attack the rogue and confiscate his assigned equipment.

At the start of the Demon in a Bottle storyline, Hammer invented a device called the Hypersonic Scan Transmitter which allowed him to take control of Iron Man's armor. He tested this remote control affecting Iron Man's unibeam, sealing plates, and boot jets.^[6] Angered that he had lost a lucrative bid to Stark International, he took control of Iron Man's armor and forced him to kill the Carnelian ambassador, and set an army of superhuman criminals (consisting of Beetle I, Constrictor, Discus, Leap-Frog, Man-Killer, Porcupine I, Stiletto, and Water Wizard) against Iron Man. Ultimately, Tony Stark not only cleared his name and destroyed the control device, but finally learned that a major enemy was behind multiple attacks on his interests for years.^[7]

With help from the supervillain Force, Hammer next hijacked yachts to smuggle opium into the United States. They battled Iron Man and were defeated.^[8] When Stark lost his company to Obadiah Stane, Hammer left the destitute Stark to his own devices while continuing with his own enterprises. When Stark recovered and re-entered the business world with Stark Enterprises, Hammer sent the Adap-Tor (a robotic attack drone disguised as a helicopter) to attack the new company as a way of "welcoming" Stark back.^[9]

For a time, Hammer frequently hired the villain group known as the Death Squad in an attempt to kill both Tony Stark and Iron Man, but fired the group after they constantly failed.^[10]

When Force later attempted to go straight, Hammer sent Beetle, Blacklash, and Blizzard II to retrieve Force, but they were defeated by Force with help from Iron Man and Jim Rhodes.^[11]

During the "Armor Wars" storyline, Hammer had Tony Stark's Iron Man technology stolen by Spymaster and sold it to a number of superhumans who wore powered armor (including Stilt-Man, the Raiders, the Mauler, Beetle, Crimson Dynamo and the Titanium Man).^[12] Iron Man set about to disable the Stark-based technology in the suits in question, going so far as to also disable sanctioned technology in the armor of S.H.I.E.L.D.'S Mandroids and the Vault's Guardsmen, leading him into conflict with The Captain and his fellow Avengers.

Hammer later sent the Rhino (who Hammer once provided a removable version of his armor to) to break Blizzard out of prison.^[13] He sent his "B-Team" (Blacklash, Blizzard, and Boomerang) to battle Ghost and Iron Man.^[14]

Hammer redesigned Scorpion's tail and sent him to abduct General Musgrave. When Scorpion refused to complete his mission, Hammer sent Blacklash and the Rhino to retrieve the tail.^[15] Hammer later learned that Tony Stark had been shot, and ordered a batch of orchids to be sent to him with a card expressing condolences should he live.^[16] He sent Boomerang to raid a Stark Enterprises security office^[17] and hired Taskmaster to train the second Spymaster.^[18]

Later, Hammer agreed to design a new costume for Rhino.^[19] He sent Rhino and Boomerang to battle Cardiac.^[20] With the Life Foundation, Roxxon Oil, Stane International, and the Brand Corporation, he abducted a number of superhuman beings to analyze their abilities. He also helped the first Sphinx to reclaim the Ka-Stone.^[21]

Years later, it was revealed that Hammer had obtained Stane International after the death of its chairman Obadiah Stane, causing problems for Tony Stark through his old company. With operatives of HYDRA, Roxxon Oil, Moroboshi International, and the Trinational Commission, he tricked the Masters of Silence into attacking Stark Enterprises. Even when forced to sell his stock in Stane International to Stark for the sum of one dollar,^[22] Hammer had the last laugh when all the shady dealings and irresponsible, or even criminal actions of Stane International came back to bite Tony later.

Hammer later sent Barrier, Blacklash, and Ringer to recruit Luis Barrett to become the new Thunderbolt. The three villains were foiled by the Pantheon.^[23]

In the mini-series Bad Blood, Hammer is diagnosed with incurable cancer and resolves to destroy Tony Stark before dying. However, he inadvertently places himself in cryogenic stasis during a battle with Iron Man and is lost in space.^[24]

Justin Hammer is a normal, middle-aged man. He has a degree in commerce and business, and is an extremely efficient administrator with a genius-level intellect. He has access to various forms of advanced technology designed by his technicians.

Justin is later revealed to be the father of Justine Hammer and the grandfather of Sasha Hammer, who have each run Hammer Industries in his absence.^[25]

In the Earth X reality where Terrigen Mist mutates most of the world population, Hammer is murdered by Norman Osborn on his rise to being President of the United States.^[26]

An alternate universe variant of Justin Hammer from Earth-1610 appears in the Ultimate Marvel universe. This version is American and a rival of Norman Osborn who later dies from a heart attack during Doctor Octopus' fight with Spider-Man.^[27][28] He also secretly funded superhuman testing violating the Superhuman Test Ban Treaty, contributing to the creation of Electro and Sandman.^[29][30]

• Justin Hammer appears in Iron Man (1994), voiced by Tony Steedman in the first season and Efrem Zimbalist Jr. in the second.^[31] This version is an ally of the Mandarin who seeks to profit off of his plans to defeat Iron Man.
• Justin Hammer appears in Iron Man: Armored Adventures, voiced by Michael Adamthwaite.^[31] This version is the 21-year-old owner of Hammer Multinational and primary operator of the "Titanium Man" armor.^[32] After inheriting his family's fortune and company, Hammer arrives in New York to buy Stark International, but fails to and resorts to criminal means. Throughout the series, Hammer displays vast influence in the criminal underworld and eagerness to take down the Stark company. After Hammer turns his accomplice Mr. Fix into an A.I., the latter seeks revenge by driving Hammer mad with paranoia and eventually exposing his criminal activities. Desperate to maintain power, Hammer attempts to disperse a zombification gas throughout Manhattan, but Iron Man defeats him before Mr. Fix uses the gas on Hammer, who is taken into S.H.I.E.L.D. custody.
• Justin Hammer appears in Avengers Assemble, voiced by Jason Spisak.^[31][33] This version is modeled after Sam Rockwell's portrayal from Iron Man 2 (see below) and is the designer of various technological innovations such as the Super-Adaptoid, Dreadnoughts, and Mandroids. Throughout the series, he makes failed attempts to join the Cabal, has his technology hijacked by MODOK and Ultron, and battles the Avengers and Thunderbolts as the Mega-Mandroid before being defeated and arrested.
• Justin Hammer appears in Lego Marvel Avengers: Climate Conundrum, voiced by Bill Newton.^[31] This version operates the Detroit Steel armor.

Justin Hammer appears in media set in the Marvel Cinematic Universe (MCU), portrayed by Sam Rockwell:

• Early stages of Iron Man (2008) had Hammer appear as an ancillary villain operating under Howard Stark / War Machine.^[34]
• Hammer makes his first official appearance in Iron Man 2.^[1] This version is an American defense contractor and rival to Tony Stark, who he appears closer to in age. Hammer attends Stark's Congress hearing to discuss selling Iron Man's armors, where Stark mocks him for his inability to recreate his technology. In his quest to best Stark, Hammer recruits Ivan Vanko to build armored suits for him after breaking the latter out of prison and modifies James Rhodes's stolen Iron Man armor into the War Machine armor. While displaying Vanko's creations at the Stark Expo, Vanko betrays Hammer to pursue his own revenge against Stark while Hammer is arrested for his involvement with Vanko.
• Hammer appears in the mid-credits scene of the Marvel One-Shot All Hail the King. Having been incarcerated at Seagate Prison, he has entered a same-sex relationship with a younger inmate and criticizes fellow inmate Trevor Slattery.^[35]
• An alternate timeline variant of Hammer appears in the What If...? episode "What If... Happy Hogan Saved Christmas?".^[31] After breaking out of prison, he mounts a siege on Avengers Tower with his henchmen Sergei and Rusty to steal Stark's technology and a sample of Bruce Banner's blood, but loses the latter to Happy Hogan, who transforms into a Hulk-like monster. Despite hijacking Stark's Hulkbuster armor, Hammer is defeated by Hogan and returned to prison.

• The MCU incarnation of Justin Hammer appears as a playable character in Lego Marvel's Avengers, voiced again by Jason Spisak.^[31]
• Justin Hammer appears in Marvel's Avengers, voiced by Nicolas Roye.^[31]

• Justin Hammer at Marvel.com
• Justin Hammer at Marvel Wiki
• Justin Hammer at Comic Vine