HUDSON TECHNOLOGIES INC

Ticker: HDSN CUSIP: 444144109 Class: Common Stock

Violich Capital Management, Inc.'s Holding History (CIK: 0001326766)

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

Q2 2018

Shares 43,340 Value ($000) $87 Avg Close $3.24 Range $1.93 - $4.97

Q1 2018

Shares 37,500 Value ($000) $185 Avg Close $5.89 Range $4.39 - $6.98

Q4 2017

Shares 42,500 Value ($000) $258 Avg Close $6.09 Range $5.40 - $8.02

Q3 2017

Shares 27,700 Value ($000) $216 Avg Close $8.66 Range $7.58 - $10.40

Q2 2017

Shares 22,000 Value ($000) $186 Avg Close $7.65 Range $6.32 - $8.93

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	43,340	$87	$3.24	$1.93 - $4.97
Q1 2018	37,500	$185	$5.89	$4.39 - $6.98
Q4 2017	42,500	$258	$6.09	$5.40 - $8.02
Q3 2017	27,700	$216	$8.66	$7.58 - $10.40
Q2 2017	22,000	$186	$7.65	$6.32 - $8.93