Here are some archived screen captures re the Atlantic Aviation franchise at KSMO. As seen in the locations map, this is a major FBO with more than 65 franchises nationwide. Atlantic is based in Plano, TX, and is a wholly owned and operated subsidiary of Macquarie Infrastructure Corporation.
The business caters primarily to high-end travel, such as bizjets and air charter. Other SoCal locations include facilities at KLAX, KBUR (Burbank), KSBA (Santa Barbara), KCRQ (Carlsbad), KSNA (Orange County), and KPSP (Palm Springs). Operations at KSMO could easily be absorbed by these other airports. Because bizjets generally perform comparably to commercial airliners (in terms of speeds and climb/descent rates), the overall ATC efficiency would actually be improved by ending jet access at KSMO.