The impact of the recent wave of leveraged buyouts is evident in Forbes magazine's list of the nation's 400 largest private companies, which was topped for the fourth straight year by commodities giant Cargill.

Forbes said in its Dec. 12 issue that 40 entries on the list were public companies that went private in 1988 - compared with 21 on the list last year - including such well-known businesses as Trans World Airlines and Montgomery Ward.Minneapolis-based Cargill's 1987 revenue totaled $38.2 billion, Forbes said. That was was more than double that of the second-largest company on the list, Koch Industries.