What SEC filings does Energy Recovery, Inc. submit to the SEC?

Energy Recovery, Inc. (ERII) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about ERII?

A Form 4 for ERII discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Energy Recovery, Inc.?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for ERII?

The 10-K is Energy Recovery, Inc.'s annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all ERII SEC filings directly on EDGAR?

You can view all historical Energy Recovery, Inc. filings on the SEC EDGAR company page for ERII. Each filing card on this page links directly to the original SEC document.

How often does Energy Recovery, Inc. file with the SEC?

Energy Recovery, Inc. files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling ERII shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

ERII SEC Filing News — Energy Recovery, Inc.

Latest SEC filings for Energy Recovery, Inc. (ERII) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-08-05.

Energy Recovery, Inc., together with its subsidiaries, designs, manufactures, and sells energy efficiency technology solutions in the United States, North, South and Latin America, the Middle East, Northern Africa, Asia, and Europe. It operates through Water and Emerging Technologies segments. The company offers high and low pressure, and ultra high-pressure exchangers; AT and LPT hydraulic turbochargers; and high-pressure feed and circulation pumps for use in water treatment industries, includi…

Sector: Industrials Industry: Pollution & Treatment Controls Market Cap: $340.0M

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for ERII currently lean bearish. Of the 20 filing records displayed, 3 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 2 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.

ERII Filing Activity Snapshot 2026-05-15 — 2026-08-05

Insider Transactions (Form 4)

2 buys vs 3 sells

Net insider selling in this period — insiders sell for many reasons beyond conviction.

Largest Form 144 Filing

$166.8K

TONDREAU PAMELA L. (Director) · 2026-05-15

20,000 shares · Form 4

Form 144 Notices

Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.

Insider Transactions 11 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 11 filings in this group are Form 4s for Energy Recovery, Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 11 insider filings shown, the breakdown is 6 compensation award, 3 open-market sale and 2 open-market purchase. 5 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Compensation award ×6: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Open-market sale ×3: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Open-market purchase ×2: The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Form 4 Open-market sale Insider Selling 2026-07-29

ERII insider Clemente Rodney (SVP, Water) sold 5,387 shares (~$46.1K)

Clemente Rodney, listed as SVP, Water at Energy Recovery, Inc., reported an open-market sale of 5,387 ERII shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	2,320	$8.42	$19.5K
`S`	Open-market sale	5,387	$8.56	$46.1K

Filing: Form 4 (Insider Transaction) Insider: Clemente Rodney (SVP, Water) Shares: 5,387 Est. Value: $46.1K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-07-29

ERII insider Yeung William (Chief Legal Officer) sold 2,048 shares (~$17.5K)

Yeung William, listed as Chief Legal Officer at Energy Recovery, Inc., reported an open-market sale of 2,048 ERII shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	2,828	$8.42	$23.8K
`S`	Open-market sale	2,048	$8.56	$17.5K

Filing: Form 4 (Insider Transaction) Insider: Yeung William (Chief Legal Officer) Shares: 2,048 Est. Value: $17.5K

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-07-22

ERII insider Form 4 filed for equity award, exercise, or tax withholding

Mitchell John Joseph (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	16,797	—	—

Filing: Form 4 (Insider Transaction) Insider: Mitchell John Joseph (Director) Shares: 16,797

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-25

ERII insider Form 4 filed for equity award, exercise, or tax withholding

Ryan Aidan (Interim CFO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	18,518	$11.61	$215.0K

Filing: Form 4 (Insider Transaction) Insider: Ryan Aidan (Interim CFO) Shares: 18,518

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market purchase Insider Buying 2026-06-17

ERII insider Sabol Colin R (Director) bought 11,180 shares (~$99.3K)

Sabol Colin R, listed as Director at Energy Recovery, Inc., reported an open-market purchase of 11,180 ERII shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`P`	Open-market purchase	11,180	$8.88	$99.3K

Filing: Form 4 (Insider Transaction) Insider: Sabol Colin R (Director) Shares: 11,180 Est. Value: $99.3K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-06-17

ERII insider BUEHLER ALEXANDER J (Director, Interim President and CEO) sold 14,900 shares (~$129.8K)

BUEHLER ALEXANDER J, listed as Director, Interim President and CEO at Energy Recovery, Inc., reported an open-market sale of 14,900 ERII shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	15,327	$8.60	$131.8K
`S`	Open-market sale	14,900	$8.71	$129.8K
`M`	Option exercise derivative · Stock Option (Right to Buy)	15,327	$8.60	$131.8K

Filing: Form 4 (Insider Transaction) Insider: BUEHLER ALEXANDER J (Director, Interim President and CEO) Shares: 14,900 Est. Value: $129.8K

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-05

ERII insider Form 4 filed for equity award, exercise, or tax withholding

TONDREAU PAMELA L. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	22,316	$8.29	$185.0K

Filing: Form 4 (Insider Transaction) Insider: TONDREAU PAMELA L. (Director) Shares: 22,316

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-05

ERII insider Form 4 filed for equity award, exercise, or tax withholding

Chow Joan Kai (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	18,094	$8.29	$150.0K

Filing: Form 4 (Insider Transaction) Insider: Chow Joan Kai (Director) Shares: 18,094

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-05

ERII insider Form 4 filed for equity award, exercise, or tax withholding

Sabol Colin R (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	18,094	$8.29	$150.0K

Filing: Form 4 (Insider Transaction) Insider: Sabol Colin R (Director) Shares: 18,094

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-05

ERII insider Form 4 filed for equity award, exercise, or tax withholding

Hanstveit Arve (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	18,094	$8.29	$150.0K

Filing: Form 4 (Insider Transaction) Insider: Hanstveit Arve (Director) Shares: 18,094

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market purchase Insider Buying 2026-05-15

ERII insider TONDREAU PAMELA L. (Director) bought 20,000 shares (~$166.8K)

TONDREAU PAMELA L., listed as Director at Energy Recovery, Inc., reported an open-market purchase of 20,000 ERII shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`P`	Open-market purchase	20,000	$8.34	$166.8K

Filing: Form 4 (Insider Transaction) Insider: TONDREAU PAMELA L. (Director) Shares: 20,000 Est. Value: $166.8K

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 3 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Energy Recovery, Inc. has 3 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-07-28

ERII Form 144 filed for proposed insider sale by Yeung William (2,048 shares) ~$17.5K

Yeung William filed a Form 144 with the SEC indicating intent to sell ERII (Energy Recovery, Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Yeung William Shares: 2,048 Est. Value: $17.5K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-07-28

ERII Form 144 filed for proposed insider sale by Clemente Rodney (5,387 shares) ~$46.1K

Clemente Rodney filed a Form 144 with the SEC indicating intent to sell ERII (Energy Recovery, Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Clemente Rodney Shares: 5,387 Est. Value: $46.1K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-06-15

ERII Form 144 filed for proposed insider sale by BUEHLER ALEXANDER J (14,900 shares) ~$131.6K

BUEHLER ALEXANDER J filed a Form 144 with the SEC indicating intent to sell ERII (Energy Recovery, Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: BUEHLER ALEXANDER J Shares: 14,900 Est. Value: $131.6K

View on SEC EDGAR → Open Filing Document →

Material Events 5 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 5 in this period for Energy Recovery, Inc. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-08-05

ERII filed 8-K — material company event

Energy Recovery, Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-07-13

ERII filed 8-K — material company event

Energy Recovery, Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K/A Amended Material Company Update 2026-06-11

ERII filed amended 8-K — material company event

Energy Recovery, Inc. filed an amended 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K/A (Material Event Amendment)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-06-08

ERII filed 8-K — material company event

Energy Recovery, Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-05-28

ERII filed 8-K — material company event

Energy Recovery, Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Periodic Reports 1 · Forms 10-K and 10-Q

The periodic reports are where the audited and reviewed financial statements live. This period contains 1 quarterly report (10-Q) for Energy Recovery, Inc.

The two are not equivalent in weight. A 10-K is audited by an external firm and includes the full risk factor disclosure, business description and management discussion; a 10-Q is unaudited, reviewed rather than examined, and much shorter. When a figure in a quarterly report is later revised, the annual report is usually where the correction appears.

An amended report — 10-K/A or 10-Q/A — restates or corrects something in the original filing, and is worth reading against the version it replaces.

Form 10-Q Quarterly Report 2026-08-05

ERII filed Quarterly Report (10-Q)

Energy Recovery, Inc. filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)

View on SEC EDGAR → Open Filing Document →

How we classify Energy Recovery, Inc.'s filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on ERII. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — ERII SEC Filings

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ERII Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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