HUDSON TECHNOLOGIES INC

Ticker: HDSN CUSIP: 444144109 Class: Common Stock

PERRITT CAPITAL MANAGEMENT INC's Holding History (CIK: 0001279342)

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

Q2 2019

Shares 674,540 Value ($000) $580 Avg Close $1.59 Range $0.78 - $2.20

Q1 2019

Shares 780,540 Value ($000) $1,506 Avg Close $1.41 Range $0.89 - $2.25

Q4 2018

Shares 815,540 Value ($000) $726 Avg Close $1.10 Range $0.70 - $2.14

Q3 2018

Shares 962,090 Value ($000) $1,231 Avg Close $1.77 Range $1.22 - $2.39

Q2 2018

Shares 809,050 Value ($000) $1,626 Avg Close $3.24 Range $1.93 - $4.97

Q1 2018

Shares 795,050 Value ($000) $2,087 Avg Close $5.89 Range $4.39 - $6.98

Q4 2017

Shares 782,450 Value ($000) $4,749 Avg Close $6.09 Range $5.40 - $8.02

Q3 2017

Shares 784,050 Value ($000) $6,123 Avg Close $8.66 Range $7.58 - $10.40

Q2 2017

Shares 1,054,050 Value ($000) $8,907 Avg Close $7.65 Range $6.32 - $8.93

Q1 2017

Shares 1,698,650 Value ($000) $11,211 Avg Close $7.28 Range $6.02 - $8.28

Q4 2016

Shares 1,684,250 Value ($000) $13,491 Avg Close $7.06 Range $5.55 - $8.50

Q3 2016

Shares 1,704,250 Value ($000) $11,333 Avg Close $5.28 Range $3.26 - $6.72

Q2 2016

Shares 1,700,750 Value ($000) $6,123 Avg Close $3.41 Range $3.09 - $3.95

Q1 2016

Shares 1,700,750 Value ($000) $5,578 Avg Close $3.15 Range $2.64 - $3.69

Q4 2015

Shares 1,682,750 Value ($000) $4,998 Avg Close $3.09 Range $2.69 - $3.56

Q3 2015

Shares 1,684,450 Value ($000) $5,003 Avg Close $3.15 Range $2.45 - $3.58

Q2 2015

Shares 1,682,850 Value ($000) $5,873 Avg Close $3.98 Range $3.40 - $4.75

Q1 2015

Shares 1,684,750 Value ($000) $7,025 Avg Close $3.81 Range $3.35 - $4.56

Q4 2014

Shares 1,685,150 Value ($000) $6,353 Avg Close $3.69 Range $2.86 - $4.80

Q3 2014

Shares 1,678,800 Value ($000) $5,557 Avg Close $3.02 Range $2.60 - $3.59

Q2 2014

Shares 1,748,900 Value ($000) $5,054 Avg Close $2.93 Range $2.55 - $3.40

Q1 2014

Shares 1,553,300 Value ($000) $4,349 Avg Close $3.32 Range $2.68 - $4.00

Q4 2013

Shares 1,524,200 Value ($000) $5,640 Avg Close $2.46 Range $1.75 - $3.72

Q3 2013

Shares 1,459,200 Value ($000) $2,962 Avg Close $2.14 Range $1.76 - $3.26

Q2 2013

Shares 1,133,316 Value ($000) $3,615 Avg Close $3.65 Range $3.11 - $4.45

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2019	674,540	$580	$1.59	$0.78 - $2.20
Q1 2019	780,540	$1,506	$1.41	$0.89 - $2.25
Q4 2018	815,540	$726	$1.10	$0.70 - $2.14
Q3 2018	962,090	$1,231	$1.77	$1.22 - $2.39
Q2 2018	809,050	$1,626	$3.24	$1.93 - $4.97
Q1 2018	795,050	$2,087	$5.89	$4.39 - $6.98
Q4 2017	782,450	$4,749	$6.09	$5.40 - $8.02
Q3 2017	784,050	$6,123	$8.66	$7.58 - $10.40
Q2 2017	1,054,050	$8,907	$7.65	$6.32 - $8.93
Q1 2017	1,698,650	$11,211	$7.28	$6.02 - $8.28
Q4 2016	1,684,250	$13,491	$7.06	$5.55 - $8.50
Q3 2016	1,704,250	$11,333	$5.28	$3.26 - $6.72
Q2 2016	1,700,750	$6,123	$3.41	$3.09 - $3.95
Q1 2016	1,700,750	$5,578	$3.15	$2.64 - $3.69
Q4 2015	1,682,750	$4,998	$3.09	$2.69 - $3.56
Q3 2015	1,684,450	$5,003	$3.15	$2.45 - $3.58
Q2 2015	1,682,850	$5,873	$3.98	$3.40 - $4.75
Q1 2015	1,684,750	$7,025	$3.81	$3.35 - $4.56
Q4 2014	1,685,150	$6,353	$3.69	$2.86 - $4.80
Q3 2014	1,678,800	$5,557	$3.02	$2.60 - $3.59
Q2 2014	1,748,900	$5,054	$2.93	$2.55 - $3.40
Q1 2014	1,553,300	$4,349	$3.32	$2.68 - $4.00
Q4 2013	1,524,200	$5,640	$2.46	$1.75 - $3.72
Q3 2013	1,459,200	$2,962	$2.14	$1.76 - $3.26
Q2 2013	1,133,316	$3,615	$3.65	$3.11 - $4.45