FACTSET RESEARCH SYSTEMS INC — Director's Dealing 2010

Sep 28, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FACTSET RESEARCH SYSTEMS INC (FDS)
CIK: 0001013237
Period of Report: 2010-09-24

Reporting Person: DICHRISTINA MICHAEL F (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-09-24	FactSet Common Stock	M	19784	$29.00	Acquired	30763	Direct
2010-09-24	FactSet Common Stock	M	15487	$43.39	Acquired	46250	Direct
2010-09-24	FactSet Common Stock	M	14005	$43.39	Acquired	60255	Direct
2010-09-24	FactSet Common Stock	M	11023	$59.36	Acquired	71278	Direct
2010-09-24	FactSet Common Stock	M	8144	$65.67	Acquired	79422	Direct
2010-09-24	FactSet Common Stock	M	3653	$35.80	Acquired	83075	Direct
2010-09-24	FactSet Common Stock	S	33338	$80.41	Disposed	49737	Direct
2010-09-27	FactSet Common Stock	S	38758	$81.00	Disposed	10979	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-09-24	Non-Qualified Stock Option (right to buy)	$29.00	M	19784	Disposed	2015-04-20	FactSet Common Stock (19784)	Direct
2010-09-24	Non-Qualified Stock Option (right to buy)	$43.39	M	15487	Disposed	2013-08-14	FactSet Common Stock (15487)	Direct
2010-09-24	Non-Qualified Stock Option (right to buy)	$43.39	M	14005	Disposed	2013-08-14	FactSet Common Stock (14005)	Direct
2010-09-24	Non-Qualified Stock Option (right to buy)	$59.36	M	11023	Disposed	2014-08-14	FactSet Common Stock (11023)	Direct
2010-09-24	Non-Qualified Stock Option (right to buy)	$65.67	M	8144	Disposed	2015-08-14	FactSet Common Stock (8144)	Direct
2010-09-24	Non-Qualified Stock Option (right to buy)	$35.80	M	3653	Disposed	2015-10-24	FactSet Common Stock (3653)	Direct
2010-09-24	Non-Qualified Stock Option (right to buy)	$65.67	J	30628	Disposed		FactSet Common Stock (30628)	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.