Chatsworth microturbine maker Capstone Turbine Corp. was the week’s biggest mover, gaining 45 percent to close at $2.

Pasadena’s Arrowhead Pharmaceuticals Inc. was also among the week’s big movers. Its shares rose 20 percent to close at $6.23.

Breitburn Energy Partners of downtown Los Angeles was the week’s biggest loser, dropping 28 percent to close at 40 cents.