VICOR CORP

Ticker: VICR CUSIP: 925815102 Class: Common Stock

Robeco Schweiz AG's Holding History (CIK: 0001418427)

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

Q4 2017

Shares 120,000 Value ($000) $2,538 Avg Close $22.39 Range $20.00 - $25.65

Q3 2017

Shares 100,000 Value ($000) $2,355 Avg Close $18.86 Range $16.85 - $23.75

Q2 2017

Shares 100,000 Value ($000) $1,820 Avg Close $17.78 Range $15.50 - $20.65

Q1 2017

Shares 100,000 Value ($000) $1,605 Avg Close $15.43 Range $13.90 - $16.75

Q4 2016

Shares 30,000 Value ($000) $462 Avg Close $13.82 Range $11.35 - $16.15

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	120,000	$2,538	$22.39	$20.00 - $25.65
Q3 2017	100,000	$2,355	$18.86	$16.85 - $23.75
Q2 2017	100,000	$1,820	$17.78	$15.50 - $20.65
Q1 2017	100,000	$1,605	$15.43	$13.90 - $16.75
Q4 2016	30,000	$462	$13.82	$11.35 - $16.15