Institutional shares held 45.6 Million
84.7K calls
64.4K puts
Total value of holdings $652M
$1.21M calls
$920K puts
Market Cap $798M
55,787,100 Shares Out.
Institutional ownership 81.71%
# of Institutions 198


Latest Institutional Activity in ERII

Top Purchases

Q2 2025
Alpha Wave Global, LP Shares Held: 714K ($10.2M)
Q2 2025
Jacobs Levy Equity Management, Inc Shares Held: 425K ($6.07M)
Q2 2025
Ubs Group Ag Shares Held: 386K ($5.51M)
Q2 2025
Kopion Asset Management, LLC Shares Held: 303K ($4.33M)
Q2 2025
Qube Research & Technologies LTD Shares Held: 459K ($6.57M)

Top Sells

Q2 2025
Citadel Advisors LLC Shares Held: 38.1K ($545K)
Q2 2025
Goldman Sachs Group Inc Shares Held: 464K ($6.64M)
Q2 2025
Brown Capital Management LLC Shares Held: 2.48M ($35.5M)
Q2 2025
Renaissance Technologies LLC Shares Held: 141K ($2.02M)
Q2 2025
Geode Capital Management, LLC Shares Held: 1.29M ($18.5M)

About ERII

Energy Recovery, Inc., together with its subsidiaries, designs, manufactures, and sells various solutions for the seawater reverse osmosis desalination and industrial wastewater treatment industries worldwide. The company operates through Water and Emerging Technologies segments. It offers a suite of products, including energy recovery devices, and high-pressure feed and recirculation pumps; hydraulic turbochargers and boosters; and spare parts, as well as repair, field, and commissioning services. The company also offers a solution to reduce energy consumption in natural gas processing and in refrigeration systems that use carbon dioxide. It provides its products under the ERI, Ultra PX, PX, Pressure Exchanger, PX Pressure Exchanger, PX PowerTrain, VorTeq, IsoBoost, AT, and AquaBold names to large engineering, procurement, and construction firms; end-users and industry consultants; original equipment manufacturers; and aftermarket customers. The company was incorporated in 1992 and is headquartered in San Leandro, California.


Insider Transactions at ERII

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
364K Shares
From 14 Insiders
Grant, award, or other acquisition 271K shares
Exercise of conversion of derivative security 19.8K shares
Open market or private purchase 8.4K shares
Other acquisition or disposition 65K shares
Sell / Disposition
298K Shares
From 9 Insiders
Payment of exercise price or tax liability 37.1K shares
Open market or private sale 196K shares
Other acquisition or disposition 65K shares

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