BUEHLER ALEXANDER J

V.P. - Marketing & Technology at Aegion Corp · on record since May 22, 2008
Interim President and CEO at Energy Recovery, Inc. · on record since Jun 3, 2011
Director at VISCOUNT SYSTEMS INC · on record since Aug 13, 2014
Director at Energy Recovery, Inc. · on record since Mar 12, 2015
Director at LIQTECH INTERNATIONAL INC · on record since Aug 17, 2017
Interim CEO at LIQTECH INTERNATIONAL INC · on record since May 19, 2022

Insider trading activity of BUEHLER ALEXANDER J

Transactions on record: 59; since Jan 31, 2008

Open-market buys: 6; $1.3M

Open-market sells: 9; $2.4M

Companies traded: 4; last filing Jun 17, 2026

Figures computed from official regulatory filings — .

Companies where BUEHLER ALEXANDER J has traded

Energy Recovery, Inc.45 tx · $4.8M · Jun 17, 2026
LIQTECH INTERNATIONAL INC8 tx · $1M · Jan 13, 2025
VISCOUNT SYSTEMS INC1 tx · Feb 17, 2016
Aegion Corp5 tx · $24.5K · May 22, 2008

Track record of BUEHLER ALEXANDER J

Statistical track record

Free account

Open-market buys: 6

Last buy: May 17, 2022

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Transaction history of BUEHLER ALEXANDER J

Co-insiders of BUEHLER ALEXANDER J

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Energy Recovery, Inc.Listing on record	Jun 17, 2026	ExerciseD (derivative)	-15,327	8.60 USD	$131.8K		SEC
Energy Recovery, Inc.Listing on record	Jun 17, 2026	Sell	-14,900	8.71 USD	$129.8K		SEC
Energy Recovery, Inc.Listing on record	Jun 17, 2026	Exercise	15,327	8.60 USD	$131.8K		SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2025	Award	12,038	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 13, 2025	Award	53,030	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Energy Recovery, Inc.Listing on record	Aug 21, 2024	Exercise	19,841	2.92 USD	$57.9K		SEC
Energy Recovery, Inc.Listing on record	Aug 21, 2024	ExerciseD (derivative)	-19,841	2.92 USD	$57.9K		SEC
Energy Recovery, Inc.Listing on record	Jun 10, 2024	Award	11,127	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 8, 2024	Award	20,940	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Energy Recovery, Inc.Listing on record	Jun 12, 2023	Award	3,703	27.00 USD	$100K	Unusual size	SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 31, 2023	Award	98,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 31, 2023	Award	97,456	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 31, 2023	Award	924,089	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Energy Recovery, Inc.Listing on record	Jun 13, 2022	Award	4,807	20.80 USD	$100K	Unusual size	SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2022	Exercise	16,449	3.53 USD	$58.1K		SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2022	Exercise	33,551	2.92 USD	$98K		SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2022	Sell	-50,000	21.34 USD	$1.1M	Unusual size	SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2022	ExerciseD (derivative)	-33,551	2.92 USD	$98K		SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2022	ExerciseD (derivative)	-16,449	3.53 USD	$58.1K		SEC
LIQTECH INTERNATIONAL INCListing on record	May 19, 2022	Buy	2,000,000	0.50 USD	$1M	conv 97ClusterUnusual size+1	SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 5, 2022	Award	6,240	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Energy Recovery, Inc.Listing on record	Jun 10, 2021	Award	4,812	20.78 USD	$100K		SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 14, 2021	Award	4,660	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Energy Recovery, Inc.Listing on record	Nov 13, 2020	Sell	-50,000	10.28 USD	$514K	Unusual size	SEC
Energy Recovery, Inc.Listing on record	Jul 20, 2020	AwardD (derivative)	-18,669	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Energy Recovery, Inc.Listing on record	Jun 17, 2026	ExerciseD (derivative)	-15,327	8.60 USD	$131.8K		SEC
Energy Recovery, Inc.Listing on record	Jun 17, 2026	Sell	-14,900	8.71 USD	$129.8K		SEC
Energy Recovery, Inc.Listing on record	Jun 17, 2026	Exercise	15,327	8.60 USD	$131.8K		SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2025	Award	12,038	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 13, 2025	Award	53,030	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Energy Recovery, Inc.Listing on record	Aug 21, 2024	Exercise	19,841	2.92 USD	$57.9K		SEC
Energy Recovery, Inc.Listing on record	Aug 21, 2024	ExerciseD (derivative)	-19,841	2.92 USD	$57.9K		SEC
Energy Recovery, Inc.Listing on record	Jun 10, 2024	Award	11,127	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 8, 2024	Award	20,940	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Energy Recovery, Inc.Listing on record	Jun 12, 2023	Award	3,703	27.00 USD	$100K	Unusual size	SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 31, 2023	Award	98,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 31, 2023	Award	97,456	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 31, 2023	Award	924,089	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Energy Recovery, Inc.Listing on record	Jun 13, 2022	Award	4,807	20.80 USD	$100K	Unusual size	SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2022	Exercise	16,449	3.53 USD	$58.1K		SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2022	Exercise	33,551	2.92 USD	$98K		SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2022	Sell	-50,000	21.34 USD	$1.1M	Unusual size	SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2022	ExerciseD (derivative)	-33,551	2.92 USD	$98K		SEC
Energy Recovery, Inc.Listing on record	Jun 6, 2022	ExerciseD (derivative)	-16,449	3.53 USD	$58.1K		SEC
LIQTECH INTERNATIONAL INCListing on record	May 19, 2022	Buy	2,000,000	0.50 USD	$1M	conv 97ClusterUnusual size+1	SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 5, 2022	Award	6,240	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Energy Recovery, Inc.Listing on record	Jun 10, 2021	Award	4,812	20.78 USD	$100K		SEC
LIQTECH INTERNATIONAL INCListing on record	Jan 14, 2021	Award	4,660	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Energy Recovery, Inc.Listing on record	Nov 13, 2020	Sell	-50,000	10.28 USD	$514K	Unusual size	SEC
Energy Recovery, Inc.Listing on record	Jul 20, 2020	AwardD (derivative)	-18,669	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC