As of April 28, 2026, the three largest insider holders of ERII are Ole Peter Lorentzen (TenPercentOwner, 5.16Mn shares), Ole Peter Lorentzen (TenPercentOwner, 5.16Mn shares), Arve Hanstveit (Director, 382.51K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Ole Peter Lorentzen | - | 0 | 5,155,239 | 17 Sep, 2021 |
| Ole Peter Lorentzen | - | 0 | 5,155,239 | 17 Sep, 2021 |
| Arve Hanstveit | - | 382,509 | 0 | 08 Apr, 2026 |
| Robert Yu Lang Mao | President And Ceo | 248,935 | 0 | 24 May, 2024 |
| Robert Yu Lang Mao | President And Ceo | 248,935 | 0 | 24 May, 2024 |
| David W Moon | President And Ceo | 233,069 | 0 | 19 Feb, 2026 |
| David W Moon | President And Ceo | 233,069 | 0 | 19 Feb, 2026 |
| Farshad Ghasripoor | Chief Technology Officer | 52,860 | 70,230 | 05 Feb, 2025 |
| Farshad Ghasripoor | Chief Technology Officer | 52,860 | 70,230 | 05 Feb, 2025 |
| Rodney Clemente | Svp, Water | 116,008 | 0 | 06 Mar, 2026 |
| William Yeung | Chief Legal Officer | 104,167 | 0 | 19 Feb, 2026 |
| William Yeung | Chief Legal Officer | 104,167 | 0 | 19 Feb, 2026 |
| Michael S. Mancini | Chief Financial Officer | 75,051 | 0 | 19 Feb, 2026 |
| Michael S. Mancini | Chief Financial Officer | 75,051 | 0 | 19 Feb, 2026 |
| Alexander J Buehler | - | 66,328 | 0 | 06 Jun, 2025 |
| Pamela L. Tondreau | - | 55,890 | 0 | 06 Jun, 2025 |
| Pamela L. Tondreau | - | 55,890 | 0 | 06 Jun, 2025 |
| Natarajan Ramanan | Chief Technology Officer | 52,565 | 0 | 06 Mar, 2026 |
| Natarajan Ramanan | Chief Technology Officer | 52,565 | 0 | 06 Mar, 2026 |
| Matthew Hostetler | Chief Human Resources Officer | 46,556 | 0 | 19 Feb, 2026 |
| Matthew Hostetler | Chief Human Resources Officer | 46,556 | 0 | 19 Feb, 2026 |
| Joshua Ballard | Chief Financial Officer | 40,376 | 0 | 30 May, 2024 |
| David W Moon | President And Ceo | 0 | 36,950 | 15 May, 2025 |
| David W Moon | President And Ceo | 0 | 36,950 | 15 May, 2025 |
| Joan Kai Chow | - | 34,022 | 0 | 06 Jun, 2025 |
| Robert Yu Lang Mao | President And Ceo | 0 | 32,166 | 04 Oct, 2021 |
| Robert Yu Lang Mao | President And Ceo | 0 | 32,166 | 04 Oct, 2021 |
| Colin R Sabol | - | 26,397 | 0 | 06 Jun, 2025 |
| Sherif Foda | - | 9,619 | 0 | 16 Sep, 2022 |
| Sherif Foda | - | 9,619 | 0 | 16 Sep, 2022 |
| William Yeung | Chief Legal Officer | 0 | 5,568 | 17 Jun, 2022 |
| William Yeung | Chief Legal Officer | 0 | 5,568 | 17 Jun, 2022 |
| Lisa A Pollina | - | 4,007 | 0 | 13 Jun, 2023 |
| Lisa A Pollina | - | 4,007 | 0 | 13 Jun, 2023 |
| Colin R Sabol | - | 0 | 3,000 | 13 Nov, 2023 |
| Joan Kai Chow | - | 0 | 1,500 | 13 Nov, 2023 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 06 Apr, 2026 | Arve Hanstveit | Common Stock | D | 2,419 | $10.29 | 382,509 | D | S |
| 02 Apr, 2026 | Arve Hanstveit | Common Stock | D | 165,292 | $10.14 | 384,928 | D | S |
| 10 Mar, 2026 | Arve Hanstveit | Common Stock | D | 25,000 | $10.96 | 550,220 | D | S |
| 05 Mar, 2026 | Arve Hanstveit | Common Stock | D | 38,418 | $10.71 | 586,802 | D | S |
| 06 Mar, 2026 | Arve Hanstveit | Common Stock | D | 11,582 | $10.62 | 575,220 | D | S |
| 04 Mar, 2026 | Rodney Clemente | Common Stock | D | 20,568 | $10.61 | 116,008 | D | S |
| 05 Mar, 2026 | Natarajan Ramanan | Common Stock | D | 272 | $10.57 | 52,565 | D | S |
| 05 Mar, 2026 | Natarajan Ramanan | Common Stock | D | 272 | $10.57 | 52,565 | D | S |
| 03 Mar, 2026 | Natarajan Ramanan | Common Stock | D | 2,724 | $10.22 | 52,837 | D | F |
| 03 Mar, 2026 | Natarajan Ramanan | Common Stock | D | 2,724 | $10.22 | 52,837 | D | F |
| 17 Feb, 2026 | Rodney Clemente | Common Stock | A | 45,626 | $0.00 | 136,576 | D | A |
| 17 Feb, 2026 | Matthew Hostetler | Common Stock | A | 25,959 | $0.00 | 46,556 | D | A |
| 17 Feb, 2026 | Michael S. Mancini | Common Stock | A | 45,626 | $0.00 | 75,051 | D | A |
| 17 Feb, 2026 | William Yeung | Common Stock | A | 25,959 | $0.00 | 104,167 | D | A |
| 17 Feb, 2026 | Natarajan Ramanan | Common Stock | A | 29,106 | $0.00 | 55,561 | D | A |
| 17 Feb, 2026 | David W Moon | Common Stock | A | 81,812 | $0.00 | 233,069 | D | A |
| 17 Feb, 2026 | William Yeung | Common Stock | A | 25,959 | $0.00 | 104,167 | D | A |
| 17 Feb, 2026 | David W Moon | Common Stock | A | 81,812 | $0.00 | 233,069 | D | A |
| 17 Feb, 2026 | Matthew Hostetler | Common Stock | A | 25,959 | $0.00 | 46,556 | D | A |
| 17 Feb, 2026 | Natarajan Ramanan | Common Stock | A | 29,106 | $0.00 | 55,561 | D | A |