Scott Lang is an ex-convict and electronics expert hired by Stark International, which enables him to steal the Ant-Man suit from Hank Pym, who had long since given up the name, to help his sick daughter.

Created by David Michelinie, Bob Layton and John Byrne,[1] Scott Lang first appeared in The Avengers #181 (cover-dated March 1979) and as the second Ant-Man in Marvel Premiere #47 (April 1979).

[2][3] Michelinie had long been an enthusiast of shrinking heroes, and saw Hank Pym's return to the Yellowjacket guise as an opportunity to take over the discarded Ant-Man identity.

And I figured that, as a burglar, he probably enjoyed the adrenaline rush of his previous 'job,' so the excitement of heroic adventure could fill that need in him, but legally.

[5] An ongoing series focusing on Lang, titled simply Ant-Man written by Nick Spencer and drawn by Ramon Rosanas, began in January 2015.

However, at the very moment he attempted to contact her, Sondheim was forcibly taken away to Cross Technological Enterprises, and to get her out, he decided to return to burglary as a final resort.

[12] Shortly after, Scott Lang donned the Ant-Man costume on various occasions, primarily to assist Iron Man and the Avengers.

[13] He also helped Yellowjacket (Hank Pym's alias at the time) attempt to rescue the Wasp captured by Dr. Parnell Solomon, and alongside the Avengers he first battled Taskmaster.

[20] Scott was instrumental in helping Iron Man discover who possessed copies of his technology during the "Armor Wars" storyline.

[26] Lang was briefly hired by the Fantastic Four to serve as their technical consultant when Reed Richards was missing and presumed dead.

[28] Lang later returned to form a temporary Fantastic Four with the Human Torch, She-Hulk and Namorita when the other three were temporarily trapped in the Negative Zone.

[30] After his ex-wife Peggy Rae gained custody of their daughter, Lang accepted an offer to join the Avengers officially.

3 #76, Jack helped save Cassie from a child-murderer, shortly before committing suicide by traveling into space with the murderer and exploding rather than return to the containment cells required to control his power.

[32] He also appeared in the series Alias by Brian Michael Bendis, where he dated the leading character Jessica Jones, a former costumed superhero named Jewel who left that avocation to become a private investigator.

[37] His Ant-Man helmet falls into Amadeus Cho's possession for a time with Cassie's blessing, choosing to focus on the insect mind-controlling abilities.

When Jack explodes, the Scarlet Witch regains her memories and returns them to the present, including Scott (thus his death is retconned as having never actually happened, as he was merely taken from his time and brought forward).

[41] Afterwards, Scott joins the new Defenders team composed of Doctor Strange, Silver Surfer, Namor, Red She-Hulk, Iron Fist, and Black Cat.

[43] Still suffering from his daughter's death, he decided to aim all the Foundation's resources towards making Doctor Doom pay for his crime; in the meantime he engaged in a romantic relationship with Darla Deering, aka Ms. Thing.

[44] After a heated battle, Scott managed to exact his revenge on Doctor Doom by gradually overwhelming and defeating him, and by having him believe he had killed Valeria Richards.

[45] During the "AXIS" storyline, a now-heroic and repentant Doctor Doom used Scarlet Witch's powers to resurrect Cassandra Lang, seeking to atone for at least one of his crimes; she turned out alive and well on Scott's doorstep.

[50] Some months ago, Ant-Man helped Giant-Man into rescuing a computer technician named Raz Malhotra from Egghead.

[51] During the "Last Days" part of the "Secret Wars" storyline, Ant-Man recovers an unnamed Asgardian artifact from Slug which he won from Mary Morgan in a game of contract bridge.

Mary Morgan revealed that Valhalla Villas is a retirement home for Golden Age heroes and villains where they live out their days in blissful remembrance.

Using the Asgardian artifact, Mary Morgan rejuvenated the Valhalla Villa residents as Miami sees the unexpected resurgence of characters from the Golden Age.

[52] As part of the "All-New, All-Different Marvel," Ant-Man becomes a target of Whirlwind when Power Broker offers a demonstration of the Hench App to Darren Cross.

[58] During the "Secret Empire" storyline, Ant-Man joins the resistance group against HYDRA after they takeover the U.S. After seeing footage from Rick Jones, explaining Steve Rogers' conversion into HYDRA's supreme leader, Scott is among the heroes who join Hawkeye in the search for the Cosmic Cube fragments that were scattered around the world, so they could reform the Cube and restore Steve back to normal.

[61] It is eventually revealed that HYDRA found and captured Cassie, forcing Scott to become a double agent to save her life.

[65] Trying to pick up the pieces of his lost life on Earth, Scott takes up residence in an ant-hill in Florida and begins offering his service for pay.

[67] Using a gaseous form of "Pym particles" kept in a compartment in his belt,[12] Ant-Man initially had the power to shrink himself (and other people and objects along with himself) to the size of an ant and return to normal.

[73][74] Additionally, a separate character based on him, David Scotty, appears as a reserve member of the Ultimates before being transformed into a vampire and killed by fellow Giant-Man Peter.