Energy Recovery, Inc. (ERII)

About Energy Recovery, Inc.

Energy Recovery, Inc. designs and manufactures energy-saving technology for critical infrastructure, focusing on pressure exchanger technology that improves efficiency and reduces emissions in industrial processes. Its main product, the PX Pressure Exchanger, is widely used in seawater reverse osmosis desalination to recover energy and lower operating costs. The company serves customers globally in industries such as desalination, wastewater treatment, and carbon dioxide refrigeration.

Snapshot

Fundamentals are from SEC filings for FY2025, the latest annual period (ended December 31, 2025). P/E and market cap are derived from stored market prices, last retrieved on a rolling basis and typically within the past week.

Peer comparison

Where Energy Recovery’s fundamentals sit among the 684 Industrials companies. Each figure is ranked only against peers that report it, from lowest (left) to highest (right).

Energy Recovery’s gross margin of 65.1% ranks in the 94th percentile of the 466 Industrials companies reporting it. Energy Recovery’s net margin of 17.0% ranks in the 90th percentile of the 645 Industrials companies reporting it.

1 reported insider purchase (code P) totaling $99,267 in the last 90 days, against 3 sales totaling $193,423. For context, about 15% of companies in the universe saw any reported insider purchase (code P) in the same window. Browse insider activity →

Percentiles describe where a figure sits among sector peers reporting it (100th = highest). They are position within a peer group, not a rating, and not investment advice. Short interest ranking uses days to cover from FINRA Consolidated Short Interest data; FINRA is the owner and source of that data, included at no additional charge.

Institutional ownership

Held by 5 quant / multi-strat books among the superinvestors we track; no conviction manager currently reports a position.

No longer held by: Millennium Management (as of Q2 2026), Renaissance Technologies (as of Q2 2026)

From quarterly Form 13F filings, which can be up to 45 days delayed. Long US-listed positions only: excludes short positions, options, cash, bonds, and non-US holdings, so this is not a manager’s complete portfolio. Counts are of the investors we track, not all institutions. Not investment advice.

Recent insider activity

Non-derivative buys and sells (codes P/S) reported by officers, directors and 10% owners on SEC Form 4.

Reported non-derivative purchases and sales (codes P/S) — which may be open-market or private; excludes option exercises, grants, and shares withheld for taxes. Dates shown are the trade date; a Form 4 can be filed days to years later. A sale can be routine (e.g. a pre-set 10b5-1 plan), so read individual transactions in context. From SEC Form 4. Not investment advice.

Short interest

Total shares sold short as of each twice-monthly FINRA settlement. Rising short interest means more investors are positioned against the stock; days to cover estimates how many trading days of average volume that position represents.

Source: FINRA Consolidated Short Interest. FINRA is the owner and source of the FINRA-supplied data, which is included at no additional charge for your own personal or professional use; republishing or redistributing it is not permitted. Settlement dates are shown; FINRA publishes each settlement about nine business days later, so the latest figure can be two to four weeks old. Not presented as a percentage of float. No FINRA endorsement of this product is implied. Not investment advice.

Quarterly trend (as reported)

Latest 8 reported quarters, from company XBRL filings on SEC EDGAR.

Company facts

Selected SEC filings

Largest Industrials peers

All Industrials companies →