Colonial Life, Prisma sharing renovated headquarters.

• Position: Colonial Life & Accident Insurance Company

After a $19.1 million renovation of its sprawling headquarters off Interstate 126, Colonial Life realized the supplemental insurance company still needed one thing: a neighbor.

Prisma Health, the new health care organization formed by the combination of Palmetto Health and Greenville Health System, is leasing excess space on the more than 500,000 square feet of space in multiple buildings on the Colonial Life campus. Around 400 Prisma employees are working there now, with plans to increase that number to 800 by next summer.

"Even before we moved to this layout, we had about 55% occupancy on the campus, and not because we had not been growing," Colonial Life CEO Tim Arnold said. "We've been growing fairly rapidly, but we just had more space than we needed."

Arnold said Colonial Life had been looking for a roommate for a couple of years before Prisma representatives contacted the company.

"It's a great fit," Arnold said. "They do a similar kind of work to the work that we do overall with the folks that are in the common campus. I think it gives our building a new vibrancy because there's more people in the building now. There's a little bit of additional energy, a new vibe."

Prisma employees work in corporate support service roles, and patients will not receive services on the campus.

Colonial Life's new neighbors moved into shiny new digs that include a 7,634-square-foot, state-of-the-art weight room, an expansive cafeteria with a 7,195-square-foot seating area, multiple serving options and a coffee bar. Those areas are shared between employees of both companies.

"We're happy to have them here, and they've expressed interest in being a long-term partner," Arnold said. "It's great."

The renovation also created a 4,300-square-foot atrium and open workspaces, eliminating elements such as the large, private office that Arnold had and does not miss.

"I was in an office that I called a cave. It was just intimidating, and it was a throwback to a different era," he said. "People didn't want to come in and talk. I...