Ivan F. Boesky disclosed a 5.7% stake in Lorimar.

A group of companies led by the New York-based investor told the Securities and Exchange Commission that they spent $16.5 million to acquire 438,200 shares of Lorimar from Oct. 7 through Dec. 12. Boesky said the investments “were not made for the purpose of acquiring control” of the Culver City-based entertainment company, which has announced plans to merge with Telepictures early next year. The purchases were made “in connection with arbitrage and other investment activities,” he added.