Glendale-based healthcare company Apollo Medical Holdings was this week’s biggest mover, gaining 22 percent to end at $5.00. Xencor Inc. of Monrovia was also among the week’s movers. The antibody drug company gained 20 percent to end at $24.63. Los Angeles-based niche-focused online brand company Spark Networks Inc. was this week’s biggest loser, dropping 8.62 percent to end at $1.59.