CORPORATE

AST Research Inc. said it intends to file later this month for about 1.4 million common shares, of which about 800,000 will be offered by the company and the balance by certain selling shareholders.

Marriott Corp. filed covering $150 million of debt securities for “future issuance as market conditions may warrant,” the company said.

Pacificare Health Systems Inc. filed for an initial 1.35 million common shares. Of the total, 1.085 million shares are being sold by the company and the remainder by current shareholders. Proceeds will be used to establish and develop one or more health maintenance organizations in new areas and to expand and upgrade data-processing systems. Goldman, Sachs & Co. will lead the underwriting group.

Kemper Corp. filed for 2 million common shares. The company said the filing also covers up to 300,000 shares in an over-allotment option. Proceeds will be used to provide additional equity capital for its reinsurance segment, to finance the acquisition of Boettcher & Co. and to retire portions of debt. Underwriters will be Goldman, Sachs & Co., Bateman Eichler, Hill Richards Inc., Blunt Ellis & Loewi Inc., Boettcher & Co. and Prescott Ball & Turben Inc.

American Technical Ceramics Corp. filed for an initial 1.1 million common shares. Of the total, 950,000 shares will be sold by the company and the remainder by current holders. D. H. Blair Co. will be the underwriter.

Greenman Bros. Inc. filed for a proposed 1 million common shares. Of the total, 650,000 will be offered by the company and 350,000 by certain selling shareholders. Smith Barney, Harris Upham & Co. will manage the underwriting group.