Santa Monica’s Cornerstone OnDemand Inc. was the week’s top gainer, jumping 10.8 percent to close at $38.37. Guidance Software Inc. also had a big week, with the Pasadena-based company gaining 9.2 percent to close at $7.14. Reed’s Inc., the downtown beverage-maker, was the week’s biggest laggard. It closed at $1.65, down 35.3 percent.