{"transactions":[{"id":2306,"issuer":{"id":1510,"kind":"organization","name":"NORTHERN TECHNOLOGIES INTERNATIONAL CORP","symbol":"NTIC"},"owners":[{"id":1771,"kind":"person","name":"Lee Sunggyu","position":1,"cik":"0001302082","reported_name":"Lee Sunggyu","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-09-03T20:23:18.000Z","date":"2026-09-01","kind":"grant","planned":false,"acquired":true,"shares":6188,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares will vest on September 1, 2027 and be issued upon settlement of a restricted stock unit award granted under the Northern Technologies International Corporation 2024 Stock Incentive Plan, conditioned upon the Reporting Person remaining a director of Northern Technologies International Corporation through the vesting date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 6,188 shares issuable upon vesting and settlement of restricted stock units."}],"balance_after":9507,"source":{"system":"sec-edgar","filing":"0001302082-26-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1302082/000130208226000001/primary_doc.xml","form_type":"4"}},{"id":1050667,"issuer":{"id":1510,"kind":"organization","name":"NORTHERN TECHNOLOGIES INTERNATIONAL CORP","symbol":"NTIC"},"owners":[{"id":1771,"kind":"person","name":"Lee Sunggyu","position":1,"cik":"0001302082","reported_name":"Lee Sunggyu","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2025-09-03T20:59:07.000Z","date":"2025-09-01","kind":"grant","planned":false,"acquired":true,"shares":16287,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":16287,"derivative":{"exercise_price":7.42,"exercise_date":"2026-09-01","expiration_date":"2035-08-31","underlying":"Common Stock","underlying_shares":16287},"source":{"system":"sec-edgar","filing":"0001302082-25-000003","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/875582/000130208225000003/primary_doc.xml","form_type":"4"}},{"id":1416835,"issuer":{"id":1510,"kind":"organization","name":"NORTHERN TECHNOLOGIES INTERNATIONAL CORP","symbol":"NTIC"},"owners":[{"id":1771,"kind":"person","name":"Lee Sunggyu","position":1,"cik":"0001302082","reported_name":"Lee Sunggyu","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2024-09-04T23:59:38.000Z","date":"2024-09-01","kind":"grant","planned":false,"acquired":true,"shares":9843,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":9843,"derivative":{"exercise_price":13.26,"exercise_date":"2025-09-01","expiration_date":"2034-08-31","underlying":"Common Stock","underlying_shares":9843},"source":{"system":"sec-edgar","filing":"0001526513-24-000011","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/875582/000152651324000011/primary_doc.xml","form_type":"4"}},{"id":1788049,"issuer":{"id":1510,"kind":"organization","name":"NORTHERN TECHNOLOGIES INTERNATIONAL CORP","symbol":"NTIC"},"owners":[{"id":1771,"kind":"person","name":"Lee Sunggyu","position":1,"cik":"0001302082","reported_name":"Lee Sunggyu","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2023-09-06T21:08:16.000Z","date":"2023-09-01","kind":"grant","planned":false,"acquired":true,"shares":9921,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":9921,"derivative":{"exercise_price":13.25,"exercise_date":"2024-09-01","expiration_date":"2033-08-31","underlying":"Common Stock","underlying_shares":9921},"source":{"system":"sec-edgar","filing":"0001526513-23-000005","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/875582/000152651323000005/primary_doc.xml","form_type":"4"}},{"id":1801157,"issuer":{"id":1510,"kind":"organization","name":"NORTHERN TECHNOLOGIES INTERNATIONAL CORP","symbol":"NTIC"},"owners":[{"id":1771,"kind":"person","name":"Lee Sunggyu","position":1,"cik":"0001302082","reported_name":"Lee Sunggyu","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2023-08-21T20:07:37.000Z","date":"2023-08-17","kind":"exercise","planned":false,"acquired":false,"shares":8000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option has fully vested."}],"balance_after":0,"derivative":{"exercise_price":7.35,"expiration_date":"2023-08-31","underlying":"Common Stock","underlying_shares":8000},"source":{"system":"sec-edgar","filing":"0001235802-23-000099","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/875582/000123580223000099/primary_doc.xml","form_type":"4"}},{"id":1801156,"issuer":{"id":1510,"kind":"organization","name":"NORTHERN TECHNOLOGIES INTERNATIONAL CORP","symbol":"NTIC"},"owners":[{"id":1771,"kind":"person","name":"Lee Sunggyu","position":1,"cik":"0001302082","reported_name":"Lee Sunggyu","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-08-21T20:07:37.000Z","date":"2023-08-17","kind":"tax_withholding","planned":false,"acquired":false,"shares":4681,"price":12.56,"value":58793.36,"ownership":{"direct":true},"balance_after":3319,"source":{"system":"sec-edgar","filing":"0001235802-23-000099","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/875582/000123580223000099/primary_doc.xml","form_type":"4"}},{"id":1801155,"issuer":{"id":1510,"kind":"organization","name":"NORTHERN TECHNOLOGIES INTERNATIONAL CORP","symbol":"NTIC"},"owners":[{"id":1771,"kind":"person","name":"Lee Sunggyu","position":1,"cik":"0001302082","reported_name":"Lee Sunggyu","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-08-21T20:07:37.000Z","date":"2023-08-17","kind":"exercise","planned":false,"acquired":true,"shares":8000,"price":7.35,"value":58800.0,"ownership":{"direct":true},"balance_after":8000,"source":{"system":"sec-edgar","filing":"0001235802-23-000099","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/875582/000123580223000099/primary_doc.xml","form_type":"4"}},{"id":2159676,"issuer":{"id":1510,"kind":"organization","name":"NORTHERN TECHNOLOGIES INTERNATIONAL CORP","symbol":"NTIC"},"owners":[{"id":1771,"kind":"person","name":"Lee Sunggyu","position":1,"cik":"0001302082","reported_name":"Lee Sunggyu","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2022-09-14T20:53:43.000Z","date":"2022-09-01","kind":"grant","acquired":true,"shares":10309,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":10309,"derivative":{"exercise_price":11.38,"exercise_date":"2023-09-01","expiration_date":"2032-08-31","underlying":"Common Stock","underlying_shares":10309},"source":{"system":"sec-edgar","filing":"0001526513-22-000008","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/875582/000152651322000008/primary_doc.xml","form_type":"4"}}]}