 Sweetgreen Inc. SG, -11.34 reported mixed quarterly results late Thursday, and the stock rallied more than 20 after the fast-casual restaurant said it demonstrated continued recovery from the pandemic and benefited from higher prices for its salads and other health-minded meals. Sweetgreen said it lost 66.2 million, or 1.14 a share, in the fourth quarter, compared with a loss of 41.1 million, or 2.49 a share, in the year-ago period. 