SECURITIES DEALER HAS LEASEWAY <LTC> STAKE Alpine Associates, a Cresskill, N.J. securities dealer, told the Securities and Exchange Commission it has acquired 565,100 shares of Leaseway Transport Corp, or 5.9 pct of the total outstanding common stock. Alpine, a limited partnership, said it bought the stock for 28.1 mln dlrs as an investment in the ordinary course of its business as a securities dealer. It left open the possibility that it might buy more Leaseway stock or sell some or all of its current stake, but said it has no plans to seek control of the company.