AUTOMATIC DATA PROCESSING INC — Director's Dealing 2010

Mar 16, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AUTOMATIC DATA PROCESSING INC (ADP)
CIK: 0000008670
Period of Report: 2010-03-12

Reporting Person: Anenen Steven (Corporate Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-03-12	Common Stock	M	16139	$29.3805	Acquired	61182.5437	Direct
2010-03-12	Common Stock	M	13170	$34.4511	Acquired	74352.5437	Direct
2010-03-12	Common Stock	M	2373	$38.647	Acquired	76725.5437	Direct
2010-03-12	Common Stock	S	2000	$43.83	Disposed	74725.5437	Direct
2010-03-12	Common Stock	S	2220	$43.8	Disposed	72505.5437	Direct
2010-03-12	Common Stock	S	2800	$43.81	Disposed	69705.5437	Direct
2010-03-12	Common Stock	S	3000	$43.82	Disposed	66705.5437	Direct
2010-03-12	Common Stock	S	16680	$43.79	Disposed	50025.5437	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-03-12	Stock Option (Right to Buy)	$29.3805	M	16139	Disposed	2012-07-21	Common Stock (16139)	Direct
2010-03-12	Stock Option (Right to Buy)	$38.647	M	2373	Disposed	2012-11-11	Common Stock (2373)	Direct
2010-03-12	Stock Option (Right to Buy)	$34.4511	M	13170	Disposed	2013-08-10	Common Stock (13170)	Direct