"He came here to live the American dream and he did," Minneapolis Mayor R.T. Rybak said. "He was an example of someone who climbed the ladder to success."
Rahamim immigrated to the U.S. from Israel 30 years ago.
Keith Basinski was a UPS driver with a regular stop at the business. Minneapolis Police Chief Tim Dolan said Basinski was simply in the wrong place at the wrong time.
Jacob Beneke, 34, was one of the workers who was killed. The Maple Grove Arts Center's executive director told FOX 9 News Beneke was supposed to meet her on Thursday night to talk about getting local businesses to display their artwork, but he never showed.
"I'm in shock. I wouldn't have expected this to happen to Jacob. We've only known him for a couple of years and he is truly a gifted artist," Lorrie Link said. "We are truly saddened by this."
Ronald Edberg, 58, of Brooklyn Center, studied graphic design at North Hennepin Community College and graduated from Patrick Henry High School. He leaves behind two adult children.
Family members of 62-year-old Rami Cooks, of Minnetonka, were too distraught to speak on camera outside their Minnetonka home. Cooks was the production manager at Accent Signage.
Two other company executives -- John Souter and Eric Rivers -- were in critical condition at Hennepin County Medical Center, where they are still being treated. HCMC spokeswoman Christine Hill said Friday that Souter has been upgraded to serious condition.
A third person had been listed in critical condition at the hospital, but Hill had no update on that victim Friday. A fourth victim was treated and released.