VICOR CORP — Director's Dealing 2010

May 5, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: VICOR CORP (vicr)
CIK: 0000751978
Period of Report: 2010-05-03

Reporting Person: SIMMS JAMES A (Director, Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-03	Common Stock	M	764	$12.02	Acquired	764	Direct
2010-05-03	Common Stock	M	2500	$10	Acquired	3264	Direct
2010-05-03	Common Stock	S	764	$15.6756	Disposed	2500	Direct
2010-05-03	Common Stock	S	2500	$15.6756	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-05-03	Non Qualified Stock Option	$12.02	M	764	Disposed	2011-04-21	Common Stock (764)	Direct
2010-05-03	Non Qualified Stock Option	$10	M	2500	Disposed	2011-06-26	Common Stock (2500)	Direct

Footnotes

F1: Granted under the Company's Amended and Restated 2000 Stock Option and Incentive Plan and vests over a two year period.