VICOR CORP

Ticker: VICR CUSIP: 925815102 Class: Common Stock

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

Note: Option positions (PUT/CALL) are excluded.

Q4 2018

Shares 53,740 Value ($000) $2,031 Avg Close $36.53 Range $31.03 - $47.50

Q3 2018

Shares 126,745 Value ($000) $5,830 Avg Close $54.98 Range $43.27 - $64.50

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	53,740	$2,031	$36.53	$31.03 - $47.50
Q3 2018	126,745	$5,830	$54.98	$43.27 - $64.50