VICOR CORP

Ticker: VICR CUSIP: 925815102 Class: Common Stock

EMERALD ADVISERS, LLC's Holding History (CIK: 0001015083)

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

Q4 2020

Shares 155,836 Value ($000) $14,371 Avg Close $83.99 Range $73.71 - $96.64

Q3 2020

Shares 171,103 Value ($000) $13,300 Avg Close $79.56 Range $70.90 - $90.88

Q2 2020

Shares 248,292 Value ($000) $17,865 Avg Close $56.15 Range $37.28 - $73.76

Q1 2020

Shares 249,121 Value ($000) $11,096 Avg Close $47.42 Range $30.42 - $57.86

Q4 2019

Shares 139,130 Value ($000) $6,500 Avg Close $38.08 Range $28.69 - $46.89

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	155,836	$14,371	$83.99	$73.71 - $96.64
Q3 2020	171,103	$13,300	$79.56	$70.90 - $90.88
Q2 2020	248,292	$17,865	$56.15	$37.28 - $73.76
Q1 2020	249,121	$11,096	$47.42	$30.42 - $57.86
Q4 2019	139,130	$6,500	$38.08	$28.69 - $46.89