INSPERITY, INC. — Director's Dealing 2010

Dec 21, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ADMINISTAFF INC \DE\ (ASF)
CIK: 0001000753
Period of Report: 2010-12-20

Reporting Person: SARVADI PAUL J (Director, Chairman of the Board & CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-12-20	Common Stock	M	19943	$18.00	Acquired	200586	Direct
2010-12-20	Common Stock	S	19943	$28.9697	Disposed	180643	Direct
2010-12-21	Common Stock	M	10057	$18.00	Acquired	190700	Direct
2010-12-21	Common Stock	S	10057	$29.0717	Disposed	180643	Direct
2010-12-20	Common Stock	S	3885	$28.9697	Disposed	1195388	Indirect
2010-12-21	Common Stock	S	8115	$29.0717	Disposed	1187273	Indirect
2010-12-20	Common Stock	S	2072	$28.9697	Disposed	579434	Indirect
2010-12-21	Common Stock	S	3928	$29.0717	Disposed	575506	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-12-20	Employee Stock Option (right to buy)	$18.00	M	19943	Disposed	2011-03-15	Common Stock (19943)	Direct
2010-12-21	Employee Stock Option (right to buy)	$18.00	M	10057	Disposed	2011-03-15	Common Stock (10057)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	19644	Indirect

Footnotes

F1: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 10, 2010.

F2: Weighted average sales price. Actual prices ranged from $28.79 to $29.25.

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.

F4: The options became exercisable in three equal annual installments beginning on March 15, 2002.

F5: Weighted average sales price. Actual prices ranged from $28.84 to $29.24.