Company · Ownership research

Energy Recovery, Inc. ERII

CIK 0001421517

Form 4 transactions dated Sep 1, 2023 to Sep 25, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through 2026-07-29.

Insider purchases & sales

Purchased: $1.11M
Sold: $16.55M

Sep 1, 2023 – Jul 29, 2026
Available records · partial months are marked ·

202610 of 17 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2026-07-28	Clemente Rodney SVP, Water	Sale10b5-1 footnote	$46.11K 5,387 shares sold	4.74% sold Direct holding	▾
2026-07-28	Yeung William Chief Legal Officer	Sale10b5-1 footnote	$17.53K 2,048 shares sold	2.02% sold Direct holding	▾
2026-06-15	Sabol Colin R Director	Purchase	$99.27K 11,180 shares bought	25.13% added Direct holding	▾
2026-06-15	BUEHLER ALEXANDER J Interim President and CEO · Director	Sale	$129.78K 14,900 shares sold	18.25% sold Direct holding	▾
2026-05-13	TONDREAU PAMELA L. Director	Purchase	$166.84K 20,000 shares bought	115.19% added Trust holding	▾
2026-04-06	Hanstveit Arve Director	Sale	$24.89K 2,419 shares sold	0.63% sold Direct holding	▾
2026-04-02	Hanstveit Arve Director	Sale	$1.68M 165,292 shares sold	30.04% sold Direct holding	▾
2026-03-10	Hanstveit Arve Director	Sale	$273.98K 25,000 shares sold	4.35% sold Direct holding	▾
2026-03-06	Hanstveit Arve Director	Sale	$122.94K 11,582 shares sold	1.97% sold Direct holding	▾
2026-03-05	Hanstveit Arve Director	Sale	$411.46K 38,418 shares sold	6.14% sold Direct holding	▾

Showing 17 / 17 record groups in 2026. The complete set is available through the API.

Energy Recovery, Inc. · ERII

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 17 of 17 purchase / sale groups and 22 of 22 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"ERII","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.