California Resources Corp. was one of the week’s leading gainers. Shares rose 240 percent to close at $1.67 a share on Friday after the Los Angeles oil production company reported its earnings for the fourth quarter ended Dec. 31.

NantKwest, an immunotherapy company in Culver City, was another one of this week’s leading gainers, with shares up 20 percent to close at $8.87.

Marathon Patent Group, a Santa Monica company that acquires assets from patent holders, was among the week’s losing stocks. Shares fell 14 percent to close the week at $1.96 a share.