Lee Sunggyu

Director at NORTHERN TECHNOLOGIES INTERNATIONAL CORP · on record since Sep 1, 2006

Insider trading activity of Lee Sunggyu

Transactions on record: 19; since Sep 2, 2004

Open-market buys: 0

Open-market sells: 0

Companies traded: 1; last filing Sep 3, 2026

Figures computed from official regulatory filings — .

Companies where Lee Sunggyu has traded

NORTHERN TECHNOLOGIES INTERNATIONAL CORP19 tx · $175.1K · Sep 3, 2026

Track record of Lee Sunggyu

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

Transaction history of Lee Sunggyu

Co-insiders of Lee Sunggyu

ACON Refining Partners, L.L.C.NORTHERN TECHNOLOGIES INTERNATIONAL CORP
Calderon Nancy E.NORTHERN TECHNOLOGIES INTERNATIONAL CORP
CHENU PIERRENORTHERN TECHNOLOGIES INTERNATIONAL CORP
Colwell Barbara D.NORTHERN TECHNOLOGIES INTERNATIONAL CORP
Coulombe Jean-GuyNORTHERN TECHNOLOGIES INTERNATIONAL CORP
DALAL VINEETNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Frank Tilman BernhardNORTHERN TECHNOLOGIES INTERNATIONAL CORP
GENCER MEHMETNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Haglund Brian JamesNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Hahn GerhardNORTHERN TECHNOLOGIES INTERNATIONAL CORP
INTER ALIA HOLDING CONORTHERN TECHNOLOGIES INTERNATIONAL CORP
Kallmeyer VeraNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Kemp Sarah E.NORTHERN TECHNOLOGIES INTERNATIONAL CORP
Keong Koh SooNORTHERN TECHNOLOGIES INTERNATIONAL CORP
KIEL DIXON URSELANORTHERN TECHNOLOGIES INTERNATIONAL CORP
KUBIK DONALD ANORTHERN TECHNOLOGIES INTERNATIONAL CORP
LAREAU RICHARD GNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Liaw EricNORTHERN TECHNOLOGIES INTERNATIONAL CORP
LYNCH G PATRICKNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Lynch Juliane INORTHERN TECHNOLOGIES INTERNATIONAL CORP
LYNCH PHILIP MNORTHERN TECHNOLOGIES INTERNATIONAL CORP
MacDougall Michael GNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Mayers Mark MNORTHERN TECHNOLOGIES INTERNATIONAL CORP
MENG TAONORTHERN TECHNOLOGIES INTERNATIONAL CORP
Narayan RamaniNORTHERN TECHNOLOGIES INTERNATIONAL CORP
NIGON RICHARDNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Northern Tier Energy GP LLCNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Pinho Cristina Lucia DuarteNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Ramdas GautamNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Rosenbaum BarryNORTHERN TECHNOLOGIES INTERNATIONAL CORP
Singh Ronnie ANORTHERN TECHNOLOGIES INTERNATIONAL CORP
STONE MARK JNORTHERN TECHNOLOGIES INTERNATIONAL CORP
TAYLOR STEPHAN CNORTHERN TECHNOLOGIES INTERNATIONAL CORP

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 3, 2026	Award	6,188	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 3, 2025	AwardD (derivative)	16,287	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 4, 2024	AwardD (derivative)	9,843	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 6, 2023	AwardD (derivative)	9,921	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Aug 21, 2023	Exercise	8,000	7.35 USD	$58.8K		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Aug 21, 2023	Other	-4,681	12.56 USD	$58.8K		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Aug 21, 2023	ExerciseD (derivative)	-8,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 14, 2022	AwardD (derivative)	10,309	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 3, 2013	AwardD (derivative)	4,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Nov 19, 2012	AwardD (derivative)	4,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 4, 2012	AwardD (derivative)	4,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 2, 2011	AwardD (derivative)	4,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 3, 2010	AwardD (derivative)	4,000	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 1, 2009	AwardD (derivative)	4,000	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 3, 2008	AwardD (derivative)	4,000	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	Unusual size	SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 5, 2007	Award	2,000	9.75	$19.5K	Unusual size	SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 1, 2006	Award	2,000	8.07	$16.1K		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 1, 2005	Award	2,000	5.70 USD	$11.4K		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 2, 2004	AwardD (derivative)	2,000	5.25 USD	$10.5K		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 3, 2026	Award	6,188	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 3, 2025	AwardD (derivative)	16,287	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 4, 2024	AwardD (derivative)	9,843	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 6, 2023	AwardD (derivative)	9,921	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Aug 21, 2023	Exercise	8,000	7.35 USD	$58.8K		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Aug 21, 2023	Other	-4,681	12.56 USD	$58.8K		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Aug 21, 2023	ExerciseD (derivative)	-8,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 14, 2022	AwardD (derivative)	10,309	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 3, 2013	AwardD (derivative)	4,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Nov 19, 2012	AwardD (derivative)	4,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 4, 2012	AwardD (derivative)	4,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 2, 2011	AwardD (derivative)	4,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 3, 2010	AwardD (derivative)	4,000	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 1, 2009	AwardD (derivative)	4,000	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 3, 2008	AwardD (derivative)	4,000	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	Unusual size	SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 5, 2007	Award	2,000	9.75	$19.5K	Unusual size	SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 1, 2006	Award	2,000	8.07	$16.1K		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 1, 2005	Award	2,000	5.70 USD	$11.4K		SEC
NORTHERN TECHNOLOGIES INTERNATIONAL CORPListing on record	Sep 2, 2004	AwardD (derivative)	2,000	5.25 USD	$10.5K		SEC