PRESTON JOHN T

Director at E-Z-EM, Inc. · on record since May 17, 2006
Director at CLEAN HARBORS INC · on record since Sep 21, 2006
Director at ALSERES PHARMACEUTICALS INC /DE · on record since Dec 18, 2006

Insider trading activity of PRESTON JOHN T

Transactions on record: 63; since Jun 17, 2004

Open-market buys: 0

Open-market sells: 11; $3.8M

Companies traded: 3; last filing May 22, 2026

Figures computed from official regulatory filings — .

Companies where PRESTON JOHN T has traded

CLEAN HARBORS INC39 tx · $4.2M · May 22, 2026
ALSERES PHARMACEUTICALS INC /DE8 tx · $126.8K · Jan 16, 2009
E-Z-EM, Inc.16 tx · Apr 2, 2008

Track record of PRESTON JOHN T

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of PRESTON JOHN T

Co-insiders of PRESTON JOHN T

ADAM GUYCLEAN HARBORS INC
BANUCCI EUGENE GCLEAN HARBORS INC
BARON SANDRA DE-Z-EM, Inc.
BARR JOHNCLEAN HARBORS INC
Battles Michael LouisCLEAN HARBORS INC
BEALS JOHN RCLEAN HARBORS INC
BECKMAN ROBERT JE-Z-EM, Inc.
BIER COLINALSERES PHARMACEUTICALS INC /DE
BLOOMFIELD ROBERT ME-Z-EM, Inc.
Bobe FrankALSERES PHARMACEUTICALS INC /DE
BOUCHER THOMAS O JRALSERES PHARMACEUTICALS INC /DE
Bouldin Mark G.CLEAN HARBORS INC
Brem HenryALSERES PHARMACEUTICALS INC /DE
BURK CRAIG AE-Z-EM, Inc.
CACCHIOLI JOSEPH AE-Z-EM, Inc.
CHRIS PALMERALSERES PHARMACEUTICALS INC /DE
COOKSON EUGENE A JRCLEAN HARBORS INC
CORRELL JERRY ELMERCLEAN HARBORS INC
Cowan GraceCLEAN HARBORS INC

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
CLEAN HARBORS INCListing on record	May 22, 2026	Award	652	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	May 23, 2025	Award	789	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	May 23, 2024	Award	836	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Mar 15, 2024	Sell	-1,913	188.36 USD	$360.3K		SEC
CLEAN HARBORS INCListing on record	Aug 17, 2023	Sell	-2,095	173.68 USD	$363.9K		SEC
CLEAN HARBORS INCListing on record	May 25, 2023	Award	1,148	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Mar 3, 2023	Sell	-3,750	134.90 USD	$505.9K		SEC
CLEAN HARBORS INCListing on record	Aug 9, 2022	Sell	-2,168	111.50 USD	$241.7K		SEC
CLEAN HARBORS INCListing on record	May 26, 2022	Award	1,849	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jan 5, 2022	Award	257	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jun 7, 2021	Award	1,513	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Mar 2, 2021	Sell	-6,000	85.49 USD	$512.9K		SEC
CLEAN HARBORS INCListing on record	Jun 5, 2020	Award	2,168	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jun 7, 2019	Award	2,095	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jun 7, 2018	Award	2,236	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Mar 8, 2018	Sell	-5,000	50.93 USD	$254.7K		SEC
CLEAN HARBORS INCListing on record	Jun 8, 2017	Award	2,057	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jun 10, 2016	Award	2,210	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jun 12, 2015	Award	1,786	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	May 14, 2015	Sell	-4,523	56.06 USD	$253.6K		SEC
CLEAN HARBORS INCListing on record	Jun 19, 2014	Award	1,608	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Oct 2, 2013	Award	249	58.60 USD	$14.6K		SEC
CLEAN HARBORS INCListing on record	May 7, 2013	Award	1,334	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	May 8, 2012	Award	1,140	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Apr 11, 2011	Sell	-6,000	104.61 USD	$627.7K	Unusual size	SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
CLEAN HARBORS INCListing on record	May 22, 2026	Award	652	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	May 23, 2025	Award	789	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	May 23, 2024	Award	836	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Mar 15, 2024	Sell	-1,913	188.36 USD	$360.3K		SEC
CLEAN HARBORS INCListing on record	Aug 17, 2023	Sell	-2,095	173.68 USD	$363.9K		SEC
CLEAN HARBORS INCListing on record	May 25, 2023	Award	1,148	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Mar 3, 2023	Sell	-3,750	134.90 USD	$505.9K		SEC
CLEAN HARBORS INCListing on record	Aug 9, 2022	Sell	-2,168	111.50 USD	$241.7K		SEC
CLEAN HARBORS INCListing on record	May 26, 2022	Award	1,849	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jan 5, 2022	Award	257	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jun 7, 2021	Award	1,513	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Mar 2, 2021	Sell	-6,000	85.49 USD	$512.9K		SEC
CLEAN HARBORS INCListing on record	Jun 5, 2020	Award	2,168	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jun 7, 2019	Award	2,095	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jun 7, 2018	Award	2,236	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Mar 8, 2018	Sell	-5,000	50.93 USD	$254.7K		SEC
CLEAN HARBORS INCListing on record	Jun 8, 2017	Award	2,057	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jun 10, 2016	Award	2,210	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Jun 12, 2015	Award	1,786	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	May 14, 2015	Sell	-4,523	56.06 USD	$253.6K		SEC
CLEAN HARBORS INCListing on record	Jun 19, 2014	Award	1,608	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Oct 2, 2013	Award	249	58.60 USD	$14.6K		SEC
CLEAN HARBORS INCListing on record	May 7, 2013	Award	1,334	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	May 8, 2012	Award	1,140	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CLEAN HARBORS INCListing on record	Apr 11, 2011	Sell	-6,000	104.61 USD	$627.7K	Unusual size	SEC