FACTSET RESEARCH SYSTEMS INC — Director's Dealing 2010

Oct 1, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FACTSET RESEARCH SYSTEMS INC (FDS)
CIK: 0001013237
Period of Report: 2010-10-01

Reporting Person: Walsh Peter G (Executive Vice President & COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-10-01	FactSet Common Stock	M	5640	$17.57	Acquired	43296	Direct
2010-10-01	FactSet Common Stock	S	8640	$81.19	Disposed	34656	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-10-01	Non-Qualified Stock Option (right to buy)	$17.57	M	5640	Disposed	2011-10-23	FactSet Common Stock (5640)	Direct
2010-10-01	Non-Qualified Stock Option (right to buy)	$65.67	J	29777	Disposed		FactSet Common Stock (29777)	Direct

Footnotes

F1: Column 8 has been intentionally left blank because the transaction was an exercise of a derivative security.

F2: This performance-based employee stock option grant was forfeited as the issuer did not achieve certain financial performance criteria during the two-year performance period ending August 31, 2010.