Mao Robert Yu Lang

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
23 May 24	ERII Energy Recovery	Common Stock	Option exercise	Acquire M	No	No	7.79	2,084	16.23 k	248,935
23 May 24	ERII Energy Recovery	Common Stock	Option exercise	Acquire M	No	No	7.79	10,752	83.76 k	246,851
23 May 24	ERII Energy Recovery	Employee Stock Option Common Stock	Option exercise	Dispose M	No	No	7.79	2,084	16.23 k	0
23 May 24	ERII Energy Recovery	Employee Stock Option Common Stock	Option exercise	Dispose M	No	No	7.79	10,752	83.76 k	0
22 May 24	ERII Energy Recovery	Common Stock	Sell	Dispose S	No	No	13.8587	21,045	291.66 k	236,099
22 May 24	ERII Energy Recovery	Common Stock	Option exercise	Acquire M	No	No	7.79	5,208	40.57 k	257,144
22 May 24	ERII Energy Recovery	Common Stock	Option exercise	Acquire M	No	No	7.79	21,859	170.28 k	251,936
22 May 24	ERII Energy Recovery	Employee Stock Option Common Stock	Option exercise	Dispose M	No	No	7.79	5,208	40.57 k	2,084
22 May 24	ERII Energy Recovery	Employee Stock Option Common Stock	Option exercise	Dispose M	No	No	7.79	21,859	170.28 k	10,752
4 Mar 24	ERII Energy Recovery	Common Stock	Option exercise	Acquire M	No	No	9.98	21,303	212.60 k	230,077

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.