Venice-based Snap Inc. was this week’s biggest mover. The technology and social media company gained 18.43 percent to end at $14.01. Pasadena-based Arrowhead Pharmaceuticals was also among this week’s biggest movers. The biopharmaceutical company rose 15.22 percent to end at $2.12. Media company Global Eagle Entertainment Inc. was this week’s biggest loser, dropping 15.49 percent to end at $2.51.