Origin and History vol. 1
The Halo Corporation is a fictional company appearing in Wildstorm comics. It first appeared in WildC.A.T.s issue number 1 (Volume 1, August, 1992) and was created by Brandon Choi and Jim Lee and played an important role in Wildcats volume 2 and 3.
The Halo Corporation came into existence when the WildC.A.T.s were first created and has continued to serve as the team's source of income and hi-tech equipment. It was founded in the early 90’s by Emp (going by the name Jacob Marlowe) after Void found him (living on the street at the time) and told him of his Kherubim heritage. She also told him that he’d need to form a team (the WildC.A.T.s) to stop a coming threat. The Halo Corporation was the front for the team and was where all the members of the worked as far as any government agencies were concerned.
Other than the first few issues of WildC.A.T.s, the Halo Corporation stayed in the background, only being mentioned as a base for the group and not as anything on its own. The company was still there though, and Emp's silent partner, Miles Tsabo was keeping an eye on it. After the events of Homecoming Emp returned to Earth and was finished with the WildC.A.T.s and Halo. He gave up the company and left it to Savant and Mr. Majestic. This didn't last long though, and Savant and Majestic soon left the WildC.A.T.s and control of Halo was returned to Emp (after Void wiped his mind of the things he'd learned on Khera that had caused him to quit in the first place). Almost as soon as Emp was put back in charge however, Miles Tsabo decided to step in and take over the company. Because of Emp's absence and the fact that the company was losing money, Mr. Tsabo thought it was time he did things his way. After an investigation into Halo's secrets, Miles discovered that Emp was an alien and used the information to blackmail the Kherubim into giving him total control over the Halo Corporation.
History vol. 2
Jack Marlowe a.k.a. Spartan inherited Halo Corp. from Lord Emp during volume 2 of Wildcats. He moved it from New York City, NY to L.A., CA. He even bought the Library Building to do so.
History vol. 3
Jack Marlowe a.k.a Spartan decided to change the world through eco-political means; this meant through Halo Corp. Halo Corp. played the biggest part in the series in this volume.