INSPERITY, INC. — Director's Dealing 2010

Sep 30, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ADMINISTAFF INC \DE\ (ASF)
CIK: 0001000753
Period of Report: 2010-09-29

Reporting Person: SHARP DOUGLAS S (SVP Finance, CFO & Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-09-29	Common Stock	S	10000	$26.012	Disposed	74035	Direct

Footnotes

F1: The sale reported on this Form 4 was effected pursuant to a limit order placed by Mr. Sharp during an open trading window.

F2: Weighted average sales price. Actual prices ranged from $26.00 to $26.107.

F3: Full information regarding the number of shares sold at each separate price will be provided upon request to the SEC's staff, Administaff, Inc. or its stockholders.