Long Beach’s Molina Healthcare Inc. was the week’s biggest gainer after firing two top executives, jumping 33.4 percent to close at $66.43. Carson-based aerospace components maker Ducommun Inc. also had a big week, rising 17.3 percent to close at $34.46. Westwood’s Puma Biotechnology Inc. was the week’s biggest laggard, dropping 24.4 percent to close at $30.70.