Pasadena-based Arrowhead Pharmaceuticals Inc. was this week’s biggest mover, gaining 28 percent to end at $1.59. Ares Management LP was also among the week’s movers. The Los Angeles-based global alternative asset manager gained 15 percent to end at $18.45. Malibu toy marketing company Jakks Pacific, Inc. was this week’s biggest loser, dropping 28 percent to end at $5.05.

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