ERII · Energy Recovery, Inc. · Shareholders & Ownership

$6.68 +0.01 (+0.15%)

Russell 2000 member Rebalance outlook locked

Market Cap

$340.47M

51.04M

Volume · Oct 22 913.33K Avg daily vol (3M) 942.29K

Every disclosed holder of ERII in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns ERII

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	202	43,942,436	86.09%	Yes
Insiders (Forms 3, 4, 5)	14	1,569,222	3.07%	Yes
13D/G-only blocks	1	1,333,585	2.61%	Yes
Remaining	—	4,199,632	8.23%	Rest
Registered funds (N-PORT, not summed)	180	13,993,835	27.41%	No

Shares outstanding: 51,044,875, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of ERII

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	6,344,252	12.43%	+253,326	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	1,345,041	2.64%	+86,456	Jun 30, 2026	iShares Trust, not summed
1.2	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	423,324	0.83%	-2,458	Jun 30, 2026	iShares Trust, not summed
1.3	BlackRock Advantage Small Cap Core Fund Fund S000039982 · Registered fund · May 29, 2026 BlackRock Funds, not summed	409,992	0.80%	-5,181	May 29, 2026	BlackRock Funds, not summed
1.4	iShares ESG Aware MSCI USA Small-Cap ETF Fund S000061604 · Registered fund · May 31, 2026 iShares Trust, not summed	120,100	0.24%	-2,785	May 31, 2026	iShares Trust, not summed
1.5	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	97,617	0.19%	+13,650	Jun 30, 2026	Quantitative Master Series LLC, not summed
2	Amundi 13F CIK 1330387 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	4,003,535	7.84%	+263,226	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	Amundi 13G CIK 1330387 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	4,003,535	7.84%	+233,178	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
2.2	KBI GLOBAL INVESTORS AQUARIUS FUND Fund S000063187 · Registered fund · Jul 31, 2026 ADVISORS' INNER CIRCLE III, not summed	44,163	0.09%	-5,153	Jul 31, 2026	ADVISORS' INNER CIRCLE III, not summed
3	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,183,718	4.28%	-46,552	Jun 30, 2026	carried, not yet filed for the newest quarter
4	Legal & General Group Plc 13F CIK 764068 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,059,764	4.04%	+157,239	Jun 30, 2026	carried, not yet filed for the newest quarter
5	FIL Ltd 13F CIK 318989 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	1,715,722	3.36%	-272,197	Jun 30, 2026	carried, not yet filed for the newest quarter
6	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,697,550	3.33%	+402,442	Jun 30, 2026	carried, not yet filed for the newest quarter
7	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,625,893	3.19%	-147,055	Jun 30, 2026	carried, not yet filed for the newest quarter
7.1	State Street(R) SPDR(R) S&P Kensho New Economies Composite ETF Fund S000063362 · Registered fund · Jun 30, 2026 SPDR SERIES TRUST, not summed	305,275	0.60%	-215,105	Jun 30, 2026	SPDR SERIES TRUST, not summed
7.2	State Street(R) SPDR(R) S&P Kensho Intelligent Structures ETF Fund S000059700 · Registered fund · Jun 30, 2026 SPDR SERIES TRUST, not summed	27,646	0.05%	+16,473	Jun 30, 2026	SPDR SERIES TRUST, not summed
7.3	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	18,300	0.04%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
7.4	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	1,179	0.00%	0	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
7.5	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	367	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
8	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,537,828	3.01%	-54,500	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
9	Trigran Investments, Inc. 13G CIK 1336800 · Registered investment adviser · Dec 31, 2023 Rule 13d-1(b), qualified institution	1,333,585	2.61%	—	Dec 31, 2023	Rule 13d-1(b), qualified institution
10	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,263,667	2.48%	+2,006	Jun 30, 2026	carried, not yet filed for the newest quarter
11	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,237,003	2.42%	+444,312	Jun 30, 2026	carried, not yet filed for the newest quarter
11.1	E*TRADE No Fee Total Market Index Fund Fund S000090722 · Registered fund · Jul 31, 2026 E Trade Trust, not summed	24	0.00%	0	Jul 31, 2026	E Trade Trust, not summed
12	MACKENZIE FINANCIAL CORP 13F CIK 919859 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,187,686	2.33%	+1,187,686	Jun 30, 2026	carried, not yet filed for the newest quarter
13	Kopion Asset Management, LLC 13F CIK 1728689 · Registered investment adviser · Sep 30, 2026	1,018,133	1.99%	+378,588	Sep 30, 2026
14	Invesco Ltd. 13F CIK 914208 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	925,550	1.81%	+99,254	Jun 30, 2026	carried, not yet filed for the newest quarter
14.1	Invesco Water Resources ETF Fund S000003048 · Registered fund · Jul 31, 2026 Invesco Exchange-Traded Fund Trust, not summed	569,788	1.12%	+88,364	Jul 31, 2026	Invesco Exchange-Traded Fund Trust, not summed
14.2	Invesco S&P Global Water Index ETF Fund S000060819 · Registered fund · Jul 31, 2026 Invesco Exchange-Traded Fund Trust II, not summed	182,156	0.36%	+7,114	Jul 31, 2026	Invesco Exchange-Traded Fund Trust II, not summed
14.3	Invesco RAFI US 1500 Small-Mid ETF Fund S000013120 · Registered fund · Jul 31, 2026 Invesco Exchange-Traded Fund Trust, not summed	67,804	0.13%	+5,590	Jul 31, 2026	Invesco Exchange-Traded Fund Trust, not summed
14.4	Invesco BuyBack AchieversTM ETF Fund S000013111 · Registered fund · Jul 31, 2026 Invesco Exchange-Traded Fund Trust, not summed	55,806	0.11%	+11,716	Jul 31, 2026	Invesco Exchange-Traded Fund Trust, not summed
14.5	Invesco MSCI Sustainable Future ETF Fund S000013122 · Registered fund · Jul 31, 2026 Invesco Exchange-Traded Fund Trust, not summed	10,079	0.02%	-1,646	Jul 31, 2026	Invesco Exchange-Traded Fund Trust, not summed
15	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	878,724	1.72%	+1,293	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	U.S. Targeted Value Portfolio Fund S000000970 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	191,484	0.38%	+169,431	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
15.2	Dimensional U.S. Targeted Value ETF Fund S000070901 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	153,660	0.30%	+152,790	Jul 31, 2026	Dimensional ETF Trust, not summed
15.3	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	92,846	0.18%	+5,347	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
15.4	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	75,669	0.15%	+36,659	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
15.5	U.S. CORE EQUITY 1 PORTFOLIO Fund S000000979 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	40,044	0.08%	0	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
16	ArrowMark Colorado Holdings LLC 13F CIK 1483859 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	847,000	1.66%	+331,000	Jun 30, 2026	carried, not yet filed for the newest quarter
16.1	Meridian Contrarian Fund Fund S000001463 · Registered fund · Jun 30, 2026 Meridian Fund Inc, not summed	847,000	1.66%	+331,000	Jun 30, 2026	Meridian Fund Inc, not summed
17	ROYCE & ASSOCIATES LP 13F CIK 906304 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	752,812	1.47%	+269,794	Jun 30, 2026	carried, not yet filed for the newest quarter
17.1	Royce Micro-Cap Fund Fund S000009506 · Registered fund · Jun 30, 2026 ROYCE FUND, not summed	199,821	0.39%	+69,240	Jun 30, 2026	ROYCE FUND, not summed
17.2	Royce Capital Fund - Micro-Cap Portfolio Fund S000009496 · Registered fund · Jun 30, 2026 ROYCE CAPITAL FUND, not summed	65,872	0.13%	+24,072	Jun 30, 2026	ROYCE CAPITAL FUND, not summed
18	AVENIR CORP 13F CIK 1033475 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	693,886	1.36%	-123,869	Jun 30, 2026	carried, not yet filed for the newest quarter
19	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	679,236	1.33%	-4,580,580	Jun 30, 2026	carried, not yet filed for the newest quarter
19.1	AMERIPRISE FINANCIAL INC 13G CIK 820027 · Investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	679,236	1.33%	-4,580,580	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
19.2	Columbia Small Cap Value Discovery Fund Fund S000012102 · Registered fund · Jul 31, 2026 COLUMBIA FUNDS SERIES TRUST I, not summed	473,396	0.93%	+18,800	Jul 31, 2026	COLUMBIA FUNDS SERIES TRUST I, not summed
19.3	Columbia Variable Portfolio - Small Cap Value Discovery Fund Fund S000012561 · Registered fund · Jun 30, 2026 COLUMBIA FUNDS VARIABLE INSURANCE TRUST, not summed	85,607	0.17%	-19,240	Jun 30, 2026	COLUMBIA FUNDS VARIABLE INSURANCE TRUST, not summed
19.4	Columbia Research Enhanced Small Cap ETF Fund S000095313 · Registered fund · Jun 30, 2026 Columbia ETF Trust I, not summed	84	0.00%	-2	Jun 30, 2026	Columbia ETF Trust I, not summed
20	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	677,248	1.33%	+570,951	Jun 30, 2026	carried, not yet filed for the newest quarter
21	Calvert Global Water Fund Fund S000024182 · Registered fund · Jun 30, 2026 Calvert Impact Fund, Inc., not summed	625,870	1.23%	+81,276	Jun 30, 2026	Calvert Impact Fund, Inc., not summed
22	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	601,335	1.18%	+132,800	Jun 30, 2026	carried, not yet filed for the newest quarter
22.1	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · May 31, 2026 Goldman Sachs ETF Trust, not summed	50,568	0.10%	+9,276	May 31, 2026	Goldman Sachs ETF Trust, not summed
22.2	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Jun 30, 2026 GOLDMAN SACHS TRUST, not summed	8,516	0.02%	-1,815	Jun 30, 2026	GOLDMAN SACHS TRUST, not summed
23	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	593,443	1.16%	+8,554	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
24	683 Capital Management, LLC 13F CIK 1404574 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	530,000	1.04%	-20,000	Jun 30, 2026	carried, not yet filed for the newest quarter
25	LAZARD ASSET MANAGEMENT LLC 13F CIK 1207017 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	500,061	0.98%	+432,632	Jun 30, 2026	carried, not yet filed for the newest quarter
26	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	478,524	0.94%	+28,087	Jun 30, 2026	carried, not yet filed for the newest quarter
26.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	27,078	0.05%	+4,306	Jun 30, 2026	Northern Funds, not summed
27	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	476,236	0.93%	+26,800	Jun 30, 2026	carried, not yet filed for the newest quarter
28	TUDOR INVESTMENT CORP ET AL 13F CIK 923093 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	471,905	0.92%	+471,905	Jun 30, 2026	carried, not yet filed for the newest quarter
29	ROYCE MICRO-CAP TRUST, INC. Fund · Registered fund · Jun 30, 2026 ROYCE MICRO-CAP TRUST, INC., not summed	466,074	0.91%	—	Jun 30, 2026	ROYCE MICRO-CAP TRUST, INC., not summed
30	Swiss Life Asset Management Ltd 13F CIK 1637689 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	464,661	0.91%	+6,878	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Hanstveit Arve Insider CIK 1430122 · Jun 4, 2026 Director, issuer-wide	460,603	0.90%	+18,094	Jun 4, 2026	Director, issuer-wide
32	Raiffeisen Bank International AG 13F CIK 2044885 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	460,000	0.90%	+110,000	Jun 30, 2026	carried, not yet filed for the newest quarter
33	Zurcher Kantonalbank (Zurich Cantonalbank) 13F CIK 1368163 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	439,817	0.86%	+410,946	Jun 30, 2026	carried, not yet filed for the newest quarter
34	CenterBook Partners LP 13F CIK 1872738 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	420,507	0.82%	+148,671	Jun 30, 2026	carried, not yet filed for the newest quarter
35	KLP KAPITALFORVALTNING AS 13F CIK 1717443 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	400,311	0.78%	-4,200	Jun 30, 2026	carried, not yet filed for the newest quarter
36	BNP PARIBAS ARBITRAGE, SA 13F CIK 1166588 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	396,421	0.78%	+125,470	Jun 30, 2026	carried, not yet filed for the newest quarter
37	VANGUARD STRATEGIC SMALL-CAP EQUITY FUND Fund S000012432 · Registered fund · Jun 30, 2026 VANGUARD HORIZON FUNDS, not summed	391,607	0.77%	-25,031	Jun 30, 2026	VANGUARD HORIZON FUNDS, not summed
38	JACOBS LEVY EQUITY MANAGEMENT, INC 13F CIK 884414 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	378,799	0.74%	+54,014	Jun 30, 2026	carried, not yet filed for the newest quarter
39	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	367,399	0.72%	+3,138	Jun 30, 2026	carried, not yet filed for the newest quarter
40	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	367,118	0.72%	-64,170	Jun 30, 2026	carried, not yet filed for the newest quarter
40.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	253,823	0.50%	-3,924	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
40.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	126,831	0.25%	+11,929	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
40.3	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	33,759	0.07%	+479	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
40.4	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	25,803	0.05%	-1,831	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
41	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	285,216	0.56%	+256,665	Jun 30, 2026	carried, not yet filed for the newest quarter
42	BROWN CAPITAL MANAGEMENT LLC 13F CIK 885062 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	282,866	0.55%	-255,197	Jun 30, 2026	carried, not yet filed for the newest quarter
42.1	Brown Capital Management Small Company Fund Fund S000010418 · Registered fund · Jun 30, 2026 Brown Capital Management Mutual Funds, not summed	192,637	0.38%	-226,622	Jun 30, 2026	Brown Capital Management Mutual Funds, not summed
43	Moon David W Insider CIK 1372923 · Feb 17, 2026 Director, President and CEO, issuer-wide	270,019	0.53%	+118,762	Feb 17, 2026	Director, President and CEO, issuer-wide
44	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	266,154	0.52%	+9,543	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
45	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	262,844	0.51%	+204,514	Jun 30, 2026	carried, not yet filed for the newest quarter
46	PINNACLE ASSOCIATES LTD 13F CIK 743127 · Registered investment adviser · Sep 30, 2026	251,840	0.49%	-74,279	Sep 30, 2026
47	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	232,829	0.46%	+143,930	Jun 30, 2026	carried, not yet filed for the newest quarter
48	VANGUARD EXPLORER FUND Fund S000002578 · Registered fund · Jul 31, 2026 VANGUARD EXPLORER FUND, not summed	227,543	0.45%	0	Jul 31, 2026	VANGUARD EXPLORER FUND, not summed
49	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	218,707	0.43%	+204,807	Jun 30, 2026	carried, not yet filed for the newest quarter
50	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	193,919	0.38%	+121,176	Jun 30, 2026	carried, not yet filed for the newest quarter

24 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 299 holders

Create a free account to page through every holder, filter by source and group by ultimate parent.

Key facts CIK 1421517 CUSIP 29270J100 13F (30d) 31 filings 30 filers Visit website Investor relations