Robert Yu Lang Mao
President and CEO at Energy Recovery Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: Energy Recovery Inc., 3 years.
Chief executive roles
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| May 23, 2024 | Energy Recovery Inc. | Option exercise | +10,752 | $7.79 | $83,758 |
| May 23, 2024 | Energy Recovery Inc. | Option exercise | +2,084 | $7.79 | $16,234 |
| May 22, 2024 | Energy Recovery Inc. | Option exercise | +21,859 | $7.79 | $170,282 |
| May 22, 2024 | Energy Recovery Inc. | Option exercise | +5,208 | $7.79 | $40,570 |
| May 22, 2024 | Energy Recovery Inc. | Open-market sale | −21,045 | $13.86 | $291,684 |
| Mar 4, 2024 | Energy Recovery Inc. | Option exercise | +20,509 | $2.92 | $59,886 |
| Mar 4, 2024 | Energy Recovery Inc. | Open-market sale | −20,509 | $15.74 | $322,812 |
| Mar 4, 2024 | Energy Recovery Inc. | Option exercise | +15,327 | $8.60 | $131,812 |
| Mar 4, 2024 | Energy Recovery Inc. | Open-market sale | −15,270 | $15.74 | $240,350 |
| Mar 4, 2024 | Energy Recovery Inc. | Option exercise | +16,726 | $7.71 | $128,957 |
| Mar 4, 2024 | Energy Recovery Inc. | Option exercise | +15,879 | $8.49 | $134,813 |
| Mar 4, 2024 | Energy Recovery Inc. | Option exercise | +21,303 | $9.98 | $212,604 |
| Mar 1, 2024 | Energy Recovery Inc. | Option exercise | +5,142 | $3.53 | $18,151 |
| Mar 1, 2024 | Energy Recovery Inc. | Option exercise | +32,883 | $2.92 | $96,018 |
| Mar 1, 2024 | Energy Recovery Inc. | Open-market sale | −5,142 | $16.22 | $83,403 |
Questions about Robert Yu Lang Mao
What boards is Robert Yu Lang Mao on?
Robert Yu Lang Mao sits on the board of Energy Recovery Inc.
What company is Robert Yu Lang Mao the CEO of?
Robert Yu Lang Mao is President and CEO of Energy Recovery Inc.
How long has Robert Yu Lang Mao served on boards?
Our records show at least 4 years of board service across 1 board, the earliest from 2023.
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