Energy Recovery, Inc. (ERII) NASDAQ

8.62

+0.31(+3.73%)

Updated at May 14 04:00PM

Currency In USD

ERII Historical Return

If you invested $1000 in Energy Recovery, Inc. (ERII) 10 years ago, it would be worth $763.51 as of May 14, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $486.46, while $1000 invested 1 year ago would be worth $700.24. This corresponds to total returns of -23.65%, -51.35%, -29.98%, respectively, with annualized returns of -2.66%, -13.41%, -29.98%.

Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.

ERII Historical Data

Date Range:

Date	Open	Close	Adj Close	High	Low	Volume
May 14, 2026	8.4	8.62	8.62	8.64	8.18	4.78M
May 13, 2026	8.73	8.31	8.31	8.77	8.14	3.48M
May 12, 2026	8.7	8.73	8.73	8.82	8.53	1.39M
May 11, 2026	9.21	8.7	8.7	9.33	8.62	1.59M
May 08, 2026	9.67	9.13	9.13	9.67	9.03	1.55M
May 07, 2026	11.13	9.43	9.43	11.13	9.3	3.62M
May 06, 2026	11.51	11.61	11.61	11.72	11.48	697,902
May 05, 2026	11.11	11.31	11.31	11.48	11.07	585,724
May 04, 2026	11.02	11	11	11.19	10.97	596,569
May 01, 2026	11.11	11.04	11.04	11.17	10.85	858,656
April 30, 2026	10.84	11.07	11.07	11.13	10.75	1.19M
April 29, 2026	11.07	10.7	10.7	11.11	10.62	641,594
April 28, 2026	11	11.09	11.09	11.12	10.81	719,523
April 27, 2026	11.3	11.05	11.05	11.47	11.03	849,210
April 24, 2026	11	11.28	11.28	11.39	10.95	1.6M
April 23, 2026	10.9	11.01	11.01	11.14	10.75	827,611
April 22, 2026	10.46	10.81	10.81	10.89	10.46	1.3M
April 21, 2026	10.74	10.37	10.37	10.86	10.23	710,471
April 20, 2026	10.5	10.46	10.46	10.69	10.43	747,629
April 17, 2026	10.66	10.58	10.58	10.79	10.51	1.74M
April 16, 2026	10.62	10.45	10.45	10.7	10.28	778,212
April 15, 2026	10.48	10.62	10.62	10.89	10.48	929,373
April 14, 2026	11.41	11.29	11.29	11.53	11.27	547,875
April 13, 2026	11.09	11.41	11.41	11.5	11.05	820,821
April 10, 2026	11	11.11	11.11	11.27	11	381,127
April 09, 2026	10.72	11.06	11.06	11.12	10.67	855,891
April 08, 2026	10.81	10.72	10.72	10.91	10.61	712,807
April 07, 2026	10.28	10.33	10.33	10.45	10.25	486,117
April 06, 2026	10.34	10.42	10.42	10.44	10.2	514,861
April 02, 2026	10.02	10.2	10.2	10.41	9.85	1.1M
April 01, 2026	10.3	10.22	10.22	10.31	10.07	695,211
March 31, 2026	9.97	10.07	10.07	10.17	9.82	871,676
March 30, 2026	10	9.81	9.81	10.02	9.76	654,758
March 27, 2026	9.87	9.87	9.87	9.98	9.76	544,997
March 26, 2026	10.09	9.94	9.94	10.21	9.86	445,008
March 25, 2026	10.36	10.14	10.14	10.43	9.99	492,091
March 24, 2026	10.02	10.17	10.17	10.51	9.97	1.11M
March 23, 2026	9.77	10.12	10.12	10.16	9.51	2M
March 20, 2026	9.79	9.46	9.46	9.86	9.35	1.9M
March 19, 2026	9.76	9.73	9.73	9.91	9.65	693,273
March 18, 2026	10.1	9.91	9.91	10.26	9.89	601,784
March 17, 2026	10.32	10.19	10.19	10.39	10.1	599,153
March 16, 2026	10.24	10.26	10.26	10.37	10.12	591,424
March 13, 2026	10.28	10.05	10.05	10.46	9.89	813,483
March 12, 2026	10.53	10.24	10.24	10.64	10.13	830,727
March 11, 2026	10.82	10.78	10.78	10.89	10.6	655,781
March 10, 2026	11.12	10.87	10.87	11.22	10.77	1.01M
March 09, 2026	10.84	11.12	11.12	11.61	10.35	1.75M
March 06, 2026	10.67	10.61	10.61	10.81	10.38	905,456
March 05, 2026	10.6	10.73	10.73	10.78	10.54	870,179
March 04, 2026	10.4	10.72	10.72	10.81	10.21	928,179
March 03, 2026	10.01	10.22	10.22	10.24	9.59	1.7M
March 02, 2026	10.29	10.26	10.26	10.36	9.85	940,752
February 27, 2026	10.46	10.43	10.43	10.79	10.03	1.2M
February 26, 2026	11.45	10.43	10.43	11.97	10.22	4.52M
February 25, 2026	16.18	16.12	16.12	16.18	15.77	459,531
February 24, 2026	16.11	16.07	16.07	16.16	15.8	299,907
February 23, 2026	16.13	16.06	16.06	16.27	15.71	369,146
February 20, 2026	16.03	16.24	16.24	16.3	15.89	272,239
February 19, 2026	15.76	16.05	16.05	16.11	15.74	279,700