RESEARCH FRONTIERS INC

Ticker: REFR CUSIP: 760911107 Class: COM

RHUMBLINE ADVISERS's Holding History (CIK: 0001115418)

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

Q1 2021

Shares 18,345 Value ($000) $52 Avg Close $3.88 Range $2.65 - $5.66

Q4 2020

Shares 18,345 Value ($000) $52 Avg Close $2.82 Range $2.50 - $3.57

Q3 2020

Shares 16,395 Value ($000) $44 Avg Close $2.90 Range $2.01 - $4.11

Q2 2020

Shares 20,985 Value ($000) $85 Avg Close $3.71 Range $1.66 - $5.70

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	18,345	$52	$3.88	$2.65 - $5.66
Q4 2020	18,345	$52	$2.82	$2.50 - $3.57
Q3 2020	16,395	$44	$2.90	$2.01 - $4.11
Q2 2020	20,985	$85	$3.71	$1.66 - $5.70