RESEARCH FRONTIERS INC

Ticker: REFR CUSIP: 760911107 Class: COM

NorthRock Partners, LLC's Holding History (CIK: 0001632097)

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

Q1 2021

Shares 40,000 Value ($000) $114 Avg Close $3.88 Range $2.65 - $5.66

Q4 2020

Shares 30,000 Value ($000) $84 Avg Close $2.82 Range $2.50 - $3.57

Q1 2020

Shares 35,461 Value ($000) $83 Avg Close $3.20 Range $2.20 - $4.24

Q4 2019

Shares 35,548 Value ($000) $107 Avg Close $3.21 Range $2.76 - $3.80

Q3 2019

Shares 35,461 Value ($000) $113 Avg Close $3.80 Range $2.70 - $5.38

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	40,000	$114	$3.88	$2.65 - $5.66
Q4 2020	30,000	$84	$2.82	$2.50 - $3.57
Q1 2020	35,461	$83	$3.20	$2.20 - $4.24
Q4 2019	35,548	$107	$3.21	$2.76 - $3.80
Q3 2019	35,461	$113	$3.80	$2.70 - $5.38