ERII Energy Recovery, Inc.

NASDAQ
$7.09

Energy Recovery, Inc. (ERII) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal In line Selling ran in line with ERII's own trailing one-year pace, with 24% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 0 buyers in the last 90 days 2 sellers in the last 90 days
Insiders buying
2
2 transactions
Insiders selling
5
25 transactions
Purchases
$266.1K
31,180 shares
Sales
$4.2M
364,925 shares
Net activity
-$3.9M
purchases less sales

How much of that selling was preplanned? 24% planned / 76% discretionary

10b5-1 plan sales $1.0M 14 transactions · 69,607 shares
Discretionary sales $3.2M 11 transactions · 295,318 shares

Largest single sale: $1.7M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: June 15, 2026 , by Sabol Colin R .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Clemente Rodney SVP, Water Sell 5,387 $8.56 $46.1K 108,301 −4.7% of holding
Yeung William Chief Legal Officer Sell 2,048 $8.56 $17.5K 99,291 −2% of holding
BUEHLER ALEXANDER J Interim President and CEO Sell 14,900 $8.71 $129.8K 66,755 −18.2% of holding
Sabol Colin R Director Buy 11,180 $8.88 $99.3K 55,671
TONDREAU PAMELA L. Director Buy 20,000 $8.34 $166.8K 37,362
Hanstveit Arve Director Sell 2,419 $10.29 $24.9K 382,509 −0.6% of holding
Hanstveit Arve Director Sell 165,292 $10.14 $1.7M 384,928 −30% of holding
Hanstveit Arve Director Sell 25,000 $10.96 $274.0K 550,220 −4.3% of holding
Hanstveit Arve Director Sell 11,582 $10.62 $122.9K 575,220 −2% of holding
Hanstveit Arve Director Sell 38,418 $10.71 $411.5K 586,802 −6.1% of holding
Ramanan Natarajan Chief Technology Officer Sell 272 $10.57 $2.9K 52,565 −0.5% of holding
Clemente Rodney SVP, Water Sell 10b5-1 20,568 $10.61 $218.3K 116,008 −15.1% of holding
Yeung William Chief Legal Officer Sell 10b5-1 646 $15.14 $9.8K 78,208 −0.8% of holding
Yeung William Chief Legal Officer Sell 10b5-1 890 $14.59 $13.0K 78,854 −1.1% of holding
Clemente Rodney SVP, Water Sell 10b5-1 724 $14.59 $10.6K 90,950 −0.8% of holding
Yeung William Chief Legal Officer Sell 10b5-1 729 $14.46 $10.5K 79,744 −0.9% of holding
Yeung William Chief Legal Officer Sell 10b5-1 7,271 $14.55 $105.8K 90,098 −7.5% of holding
Hanstveit Arve Director Sell 15,000 $14.71 $220.6K 625,220 −2.3% of holding
Hanstveit Arve Director Sell 15,000 $14.97 $224.5K 640,220 −2.3% of holding
Yeung William 2 fills Chief Legal Officer Sell 10b5-1 9,168 $18.00 $165.0K 97,369 −8.6% of holding
Yeung William Chief Legal Officer Sell 10b5-1 3,530 $17.50 $61.8K 97,369 −3.5% of holding
Yeung William Chief Legal Officer Sell 10b5-1 3,530 $17.00 $60.0K 97,369 −3.5% of holding
Yeung William Chief Legal Officer Sell 10b5-1 3,530 $16.50 $58.2K 97,369 −3.5% of holding
Yeung William 2 fills Chief Legal Officer Sell 10b5-1 3,567 $16.00 $57.1K 97,369 −3.5% of holding
Yeung William Chief Legal Officer Sell 10b5-1 15,454 $15.09 $233.1K 97,369 −13.7% of holding

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.