shares of landstar system inc lstr fell 10 in morning trading monday after the transportation services company said it estimates it could lose up to 100 million in firstquarter 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 and the disruption of the ukrainebased operations of the two agencies would have an adverse impact of about 20 million to 25 million a week in truck load revenue the company said however that given betterthanexpected revenue per load on loads hauled by truck during the first eight weeks of the first quarter it still expects firstquarter revenue to be above the high of its guidance range provided in latejanuary of 170 billion to 175 billion even after taking into account the ukraine affect separately the company said it spent 1012 million to buy back 641000 shares of its common stock quarter to date the stock has lost 86 over the past three months while the dow jones transportation average djt has shed 67 and the dow jones industrial average djia has slipped 35