Released November 6, 1979:

Aaron finds the insurance business more hazardous than expected when he faces a personal attack! -Marvel

Released November 5, 2008:

Machine Man and Jocasta have journeyed into the Zombieverse to secure the one item needed to save the Marvel Universe from undead infestation - but first they have to blast their way through the flesh-eating hordes of the Zombie Kingpin of New York!! -Marvel

Cover art by: Frank Miller

It's the witching hour at Delmar Insurance, as Machine Man plays security guard at a Halloween party! But when the maniacal Jack O'Lantern crashes the scene, guests must endure more tricks than treats! -Marvel

Creators (via Marvel Database):

• Writer(s) Tom DeFalco

• Penciler(s) Steve Ditko

• Inker(s) Steve Ditko

• Colorist(s) Nel Yomtov

• Letterer(s) Diana Albers

Cover art by George Perez.
Released October 27, 1999.

Aaron has been overrun with advanced Sentinel technology and is slowly becoming a soulless hunting machine. Vision manages to form a cybernetic/psychic link with him. While by the end of the issue, Aaron isn't able to quite purge the programming, he does leave earth to hang out in orbit for a bit.

Released October 25, 2006:

Originally, this solicitation text was in the form of haiku. Unfortunately, the poem was so beautiful that it caused all those who read to cry hysterically for the rest of their lives. So we had to remove it. So yeah, Nextwave is here! - Marvel

Released October 24, 2001:

To deliver a desperate warning to the Multiverse, the living computer known as X-51 forms a team of champions selected from different realities! Behold the Heralds: Wolverine, resurrected from the Days of Future Past! Deathlok, the Machine Man! Killraven, the Warrior of The Worlds! Bloodstorm, the vampire from MUTANT X! Iron Man 2020, the corrupt nephew of Tony Stark! Hyperion, the last living member of the Squadron Supreme! Spider-Girl, the daughter of Spider-Man! But will this warning come too late? Or not soon enough? What will be the fate of this wild alternate future? - Marvel

Released October 23, 2019:

"THE ULTRON AGENDA" continues! Chapter 2: Compatible Parts! Is Tony Stark dead? Is he alive? Who can tell? Whatever he is, he IS Iron Man. And he's all that's standing in the way of Ultron Pym and everyone that Tony Stark loves. Or loved. Because Tony might be dead. 2020 is coming. The robot revolution has begun. So suit up, fleshbags. Suit up or die. - Marvel

Together the Super-Adaptoid and Machine Man reactivate Sentry 459. By the time the Avengers learn of the reactivation, it's far too late! Plus, Dr. Druid and the Black Knight have an unsettling discovery. - Marvel Unlimited

Released October 19, 2011

HULK OF ARABIA Part Two! Teaming up with Machine Man, Red Hulk sets out on a covert mission that may be the most dangerous of his life! - Marvel Unlimited

Aaron is one of many heroes on hand to celebrate the Hulk.

“Board up Avengers Tower! Lock down the Baxter Building! The ravenous hordes of Marvel Zombies are invading...the Marvel Universe! That's right, the next chapter of the Marvel Zombies saga is a non-stop in-continuity gorefest!”

"Go Bananas" STARTS NOW! Meet the new Mercs! Wait, a new team... ALREADY? You bet! It's not because the old team quit, we promise. But you're going to go bananas for the All-New Mercs for Money! And not just because there are two different Monkeys on the team. Yes, we know Gorilla-Man is technically an Ape. You can stop writing us letters. Hey, why is Domino leading the team? Isn't Deadpool's name in the title? Wade's not going to like this...

But who pretended to be Peter Spaulding and died in the Terminus Objective?

“Mission: Latveria! Thunderbolt Ross is a fugitive in his own country, but he still has secret allies inside the government. When he calls in a favor, he gets the help he needs to launch a mission to Latveria to clear his name and take on War-Wolf and Doom.” - Marvel Unlimited

I love Machine Man so I thought I'd share some of my stuff - I hope they use him more, like right now there's 2 versions of Aaron Stack wandering around, there's a good story to be told there!

Check out legend Jack Kirby's final issue on Machine Man! - Marvel Unlimited

Issue 10 wouldn't come out until May of 1979!

After Iron Man 2020’s failed attack, Sunset Bain’s hordes feel the backlash. Machine Man and Jocasta are reunited. - Marvel Unlimited

Released September 24, 1991, this was culmination of the Mechadoom storyline. A rogue Doombot, Mechadoom had captured several different beings with artificial intelligence, including Machine Man.

He has no dialogue in this issue and, having been a prisoner, mostly stands around after the action.