As of the latest Form 4 filed Jun 25, 2026.
What Energy Recovery Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 16 most recent filings for ERII.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-25 | 2026-05-06 | Ryan Aidan Interim CFO | AAward | +18.5K | $11.61 | $215K | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Sabol Colin R Director | PPurchase | +11.2K | $8.88 | $99.3K | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | BUEHLER ALEXANDER J Interim President and CEO | SSale | −14.9K | $8.71 | $130K | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | BUEHLER ALEXANDER J, Interim President and CEO | MExercise | +15.3K | $8.60 | $132K | No | Form 4 ↗ |
| 2026-06-05 | 2026-06-04 | TONDREAU PAMELA L. Director | AAward | +22.3K | $8.29 | $185K | No | Form 4 ↗ |
| 2026-06-05 | 2026-06-04 | Hanstveit Arve Director | AAward | +18.1K | $8.29 | $150K | No | Form 4 ↗ |
| 2026-06-05 | 2026-06-04 | Sabol Colin R Director | AAward | +18.1K | $8.29 | $150K | No | Form 4 ↗ |
| 2026-06-05 | 2026-06-04 | Chow Joan Kai Director | AAward | +18.1K | $8.29 | $150K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-13 | TONDREAU PAMELA L. Director | PPurchase | +20.0K | $8.34 | $167K | No | Form 4 ↗ |
| 2026-04-08 | 2026-04-06 | Hanstveit Arve Director | SSale | −2.42K | $10.29 | $24.9K | No | Form 4 ↗ |
| 2026-04-06 | 2026-04-02 | Hanstveit Arve Director | SSale | −165K | $10.14 | $1.68M | No | Form 4 ↗ |
| 2026-03-11 | 2026-03-10 | Hanstveit Arve Director | SSale | −25.0K | $10.96 | $274K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-06 | Hanstveit Arve Director | SSale | −11.6K | $10.62 | $123K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | Hanstveit Arve, Director | SSale | −38.4K | $10.71 | $411K | No | Form 4 ↗ |
| 2026-03-06 | 2026-03-05 | Ramanan Natarajan Chief Technology Officer | SSale | −272.00 | $10.57 | $2.88K | No | Form 4 ↗ |
| 2026-03-06 | 2026-03-04 | Clemente Rodney SVP, Water | SSale | −20.6K | $10.61 | $218K | Yes (planned) | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also ERII’s full analysis or the market-wide insider trading feed. The tabs above jump to ERII’s other SEC data.
Source: SEC Form 4 filings for ERII, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.