<PAGE>
SUPPLEMENT TO
PROXY STATEMENT
FOR
ANNUAL MEETING OF STOCKHOLDERS
of
AMERICAN PACIFIC CORPORATION
3770 Howard Hughes Parkway, Suite 300
Las Vegas, Nevada 89109
(702) 735-2200
American Pacific Corporation, a Delaware corporation (the "Company"), on or
about February 10, 1997 first mailed to Stockholders of record of the Company on
February 7, 1997 the Company's Proxy Statement relating to the Company's Annual
Meeting of Stockholders to be held on Tuesday, March 11, 1997, at 10:30 a.m.,
local time, at Chin's Restaurant, 3200 S. Las Vegas Boulevard, Las Vegas,
Nevada, or adjournment(s) thereof. This Supplement amends and supplements the
Company's Proxy Statement.
Mr. Dean M. Willard, a nominee for election as a Class C Director of the
Company, beneficially owned as of February 7, 1997, 2,000 shares of the
Company's Common Stock, par value $.10 per share (the "Common Stock"), which
constituted less than one percent of the Common Stock of the Company. All
directors and executive officers of the Company as a group, which consisted of
15 persons, beneficially owned 898,103 shares, or 10.6 percent, of the Common
Stock of the Company at February 7, 1997. The directors and officers of the
Company are entitled to vote or direct the vote of 500,853 shares, or 6.2
percent, of the Common Stock of the Company as of February 7, 1997, the Record
Date for the Annual Meeting of Stockholders.
