The Los Angeles Business Journal’s index of the largest local public companies was up for the week. The weighted LABJ index rose 1 percent to close at 240, with gainers outpacing losers 97 to 55. Three companies closed the week unchanged.

Among stocks trading above a dollar, billionaire Patrick Soon-Shiong’s clinical-stage immunotherapy firm NantKwest Inc. was the week’s leading gainer for the second week in a row. Shares were up 44 percent to close at $17.09.

El Segundo postage seller Stamps.com was also one of this week’s leading gainers. Shares rose 39 percent to close at $104.99 after the company released third-quarter earnings that beat analysts’ estimates.

Marcus & Millichap Inc. was the week’s leading losing stock among those trading above a dollar. Shares of the company were down 29 percent to close at $30.75 after it released third-quarter earnings below analysts’ expectations.