Portolan Capital Management - ENERGY RECOVERY INC ownership

ENERGY RECOVERY INC's ticker is ERII and the CUSIP is 29270J100. A total of 142 filers reported holding ENERGY RECOVERY INC in Q1 2021. The put-call ratio across all filers is 0.63 and the average weighting 0.1%.

Quarter-by-quarter ownership
Portolan Capital Management ownership history of ENERGY RECOVERY INC
ValueSharesWeighting
Q4 2021$1,486,000
-7.9%
69,150
-18.4%
0.10%
-15.3%
Q3 2021$1,613,000
-79.3%
84,771
-75.3%
0.12%
-79.0%
Q2 2021$7,805,000
+20.8%
342,630
-2.8%
0.56%
+10.4%
Q1 2021$6,463,000
+46.7%
352,417
+9.1%
0.51%
+26.7%
Q4 2020$4,407,000323,0760.40%
Other shareholders
ENERGY RECOVERY INC shareholders Q1 2021
NameSharesValueWeighting ↓
Miura Global Management 260,000$5,514,6003.77%
Avenir Corp 1,780,540$37,765,2453.54%
Lagoda Investment Management, L.P. 228,595$4,848,5003.18%
Montanaro Asset Management Ltd 848,250$17,991,3833.16%
Trigran Investments, Inc. 1,333,585$28,285,3383.01%
ACK Asset Management 877,400$18,6102.70%
Sargent Investment Group, LLC 353,095$7,489,1451.80%
Pembroke Management, LTD 548,031$11,623,7381.59%
ESSEX INVESTMENT MANAGEMENT CO LLC 378,234$8,022,3431.31%
Mesirow Institutional Investment Management, Inc. 592,076$12,557,9321.27%
View complete list of ENERGY RECOVERY INC shareholders