A maker of pressure-exchanger devices that help desalination plants and wastewater facilities cut the energy they use. Its signature PX Pressure Exchanger recovers energy from the high-pressure reject stream in seawater reverse osmosis, reducing power use, and its parts are made of durable alumina ceramic. Founded in 1992 by Leif and Marissa Hauge and named for its core job — recovering energy from fluid flows — the company shipped its first PX device in 1997 to the Canary Islands, and it also applies the same tech to CO2 refrigeration.
Hostetler MatthewChief Human Resources Officer · 2 transactions
+94.3%
46.6K
26.0K
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Ryan AidanInterim CFO · 1 transaction
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15.6K
18.5K
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Select a row to see that insider’s individual transactions. † Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last year: -359.9K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.