NOVANTA INC — Director's Dealing 2011

Dec 21, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GSI GROUP INC (GSIG)
CIK: 0001076930
Period of Report: 2011-12-19

Reporting Person: Roush John A (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-12-19	Common Shares	M	111111	$9.84	Acquired	121111	Direct
2011-12-19	Common Shares	S	44268	$9.84	Disposed	76843	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-12-19	Restricted Stock Units	$	M	111111	Disposed		Common Shares (111111)	Direct

Footnotes

F1: Each Restricted Stock Unit represents the right to receive one GSI Group Inc. common share upon vesting of such Restricted Stock Unit.

F2: The sale to pay withholding taxes reported in this Form 4 was effectuated pursuant to a Rule 10b-5 Trading Instruction adopted by the reporting person on November 16, 2011.

F3: The Restricted Stock Units reported on this Form 4 vested on December 13, 2011.