Insperity Expects to Purchase 80,983 Shares at $31.00/Share Under Modified Dutch Auction Tender

Insperity, Inc.

today announced the preliminary results of its modified “Dutch auction” tender offer, which expired at 11:59 p.m., New York City time, on Dec. 21, 2012. Based on the preliminary count by Computershare Trust Company, N.A., the depositary for the tender offer, 80,983 shares of common stock, including 34,100 shares that were tendered through notice of guaranteed delivery, were properly tendered and not withdrawn, all of which were tendered at a price at or below $31.00. Based on these preliminary results, we expect to purchase 80,983 shares at a price of $31.00 per