Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ERII held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 6.1M | $61.3M | -3.9% | 11.817% | 0.00% |
| 2 | AMERIPRISE FINANCIAL INC | 5.3M | $53.0M | +15.3% | 10.204% | 0.01% |
| 3 | Amundi | 3.7M | $37.6M | +31.2% | 7.256% | 0.01% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 2.2M | $22.5M | — | 4.327% | 0.00% |
| 5 | FIL Ltd | 2.0M | $20.0M | -0.3% | 3.857% | 0.02% |
| 6 | Legal & General Group Plc | 1.9M | $19.2M | +41.6% | 3.691% | 0.00% |
| 7 | STATE STREET CORP | 1.8M | $17.9M | +0.5% | 3.440% | 0.00% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 1.3M | $13.0M | +2.7% | 2.513% | 0.00% |
| 9 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.3M | $12.7M | — | 2.448% | 0.00% |
| 10 | DIMENSIONAL FUND ADVISORS LP | 877K | $8.8M | -7.6% | 1.702% | 0.00% |
| 11 | Invesco Ltd. | 826K | $8.3M | +10.8% | 1.603% | 0.00% |
| 12 | AVENIR CORP | 818K | $8.2M | -15.7% | 1.587% | 1.00% |
| 13 | MORGAN STANLEY | 793K | $8.0M | -18.6% | 1.538% | 0.00% |
| 14 | DIAMOND HILL CAPITAL MANAGEMENT INC | 673K | $6.8M | -24.2% | 1.306% | 0.04% |
| 15 | 683 Capital Management, LLC | 550K | $5.5M | — | 1.067% | 0.43% |
| 16 | BROWN CAPITAL MANAGEMENT LLC | 538K | $5.4M | -29.6% | 1.044% | 0.77% |
| 17 | ArrowMark Colorado Holdings LLC | 516K | $5.2M | +36.9% | 1.001% | 0.14% |
| 18 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 514K | $5.2M | +47.6% | 0.997% | 0.00% |
| 19 | Kopion Asset Management, LLC | 507K | $5.1M | +51.6% | 0.984% | 3.97% |
| 20 | ROYCE & ASSOCIATES LP | 483K | $4.9M | +45.4% | 0.937% | 0.05% |
| 21 | CITADEL ADVISORS LLC | 483K | $4.9M | +2.7% | 0.936% | 0.00% |
| 22 | GOLDMAN SACHS GROUP INC | 469K | $4.7M | -22.8% | 0.909% | 0.00% |
| 23 | Swiss Life Asset Management Ltd | 458K | $4.6M | +5.5% | 0.888% | 0.02% |
| 24 | NORTHERN TRUST CORP | 450K | $4.5M | +2.8% | 0.874% | 0.00% |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 431K | $4.3M | -3.0% | 0.837% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ERII — a direct measure of their conviction.
Filings activity in ERII during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 193 | +3.2% | 101.33% | 34.18 pp | $435M | 25% |
| Q4 2025 | 187 | +1.6% | 135.51% | 14.10 pp | $582M | 9.4% |
| Q3 2025 | 184 | +0.5% | 149.61% | +23.58 pp | $642M | +19% |
| Q2 2025 | 183 | 7.6% | 126.03% | 28.50 pp | $541M | 18% |
| Q1 2025 | 198 | +7.6% | 154.53% | +10.39 pp | $663M | +7.2% |
| Q4 2024 | 184 | +10% | 144.14% | 39.89 pp | $619M | 22% |
| Q3 2024 | 167 | 2.3% | 184.03% | +45.04 pp | $790M | +32% |
| Q2 2024 | 171 | — | 138.99% | — | $597M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Latest Form 4 transactions by company officers and directors. Insider buys are widely viewed as the highest-conviction signal because executives are risking personal capital.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Jun 15, 2026 | Sabol Colin R | Buy | 11K | $8.88 | $99K |
Quick answers to the most common questions about buying ERII stock.
Based on Q1 2026 13F filings, institutional ownership of Energy Recovery, Inc. stands at 101.3%, held across 193 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of ERII, with approximately 6,090,926 shares worth $0.06B as of Q1 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of ERII, including CITADEL ADVISORS LLC.
Our composite Smart Money Score for ERII is 40 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
45 institutions opened new positions in ERII during Q1 2026, while 39 fully exited. 30 added to existing positions and 117 trimmed.
ERII institutional ownership fell by 34.18 percentage points quarter-over-quarter, with a net change of +6 holders.
The top 10 institutions account for 61.1% of all reported 13F value in ERII, and the top 25 account for 80.8%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Energy Recovery, Inc. (ERII) Institutional Ownership