 Shares of Landstar System Inc. LSTR, -1.69 fell 1.0 in morning trading Monday after the transportation services company said it estimates it could lose up to 100 million in first-quarter revenue, and up to 18 cents a share in earnings as a result of Russias invasion of Ukraine. The company said two of the largest independent sales agencies it generated a total of 13 of its 2021 revenue from have significant operations based in Ukraine. 