Figures computed from official regulatory filings — .
Analysttarget 13 USD (+69%) · consensus 5/5 · 1 buy · 0 hold · 0 sell
Ownershipinsiders 19.17% · institutions 32.21% · short 0.1% of float
In USD · as of Oct 5, 2026
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Northern Technologies International Corporation, together with its subsidiaries, develops and markets rust and corrosion inhibiting products in China, Brazil, India, the United States, and internationally. It operates through ZERUST and Natur-Tec segments. The company offers rust and corrosion inhibiting products, such as plastic and paper packaging, liquids, coatings, rust removers, cleaners, diffusers, and engineered solutions designed for the oil and gas industry under the ZERUST brand. It also provides a portfolio of bio-based and certified compostable polymer resin compounds under the Natur-Tec brand; and finished products, such as trash bags, agricultural films, and single-use disposable products under the Natur-Bag brand. In addition, the company offers on-site and technical consulting for rust and corrosion prevention issues. It sells its products and services to the automotive, general industrial, mechanical, mining, agricultural, retail consumer, and oil and gas markets through direct sales force, network of independent distributors and agents, manufacturer's sales representatives, joint ventures, and strategic partners. Northern Technologies International Corporation was incorporated in 1970 and is headquartered in Circle Pines, Minnesota.
Market information source · Oct 5, 2026
SEC company identity · Oct 5, 2026
Open-market timeline · full history
22 buys127 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| Ramdas Gautam | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Ramdas Gautam | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| LYNCH G PATRICK | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| WOLSFELD MATTHEW C | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Kemp Sarah E. | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Calderon Nancy E.track record | Other | $21.9 | SEC |
| Calderon Nancy E.track record | Other | $20.5 | SEC |
| Pinho Cristina Lucia Duarte | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Calderon Nancy E.track record | Other | $21.9 | SEC |
| von Falkenhausen Konstantin | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Calderon Nancy E.track record | Other | $20.5 | SEC |
| NIGON RICHARDtrack record | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Narayan Ramani | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Calderon Nancy E.track record | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Lee Sunggyu | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| LYNCH G PATRICK | Exercise | $107.7K | SEC |
| LYNCH G PATRICK | Sell | $16.2 | SEC |
| LYNCH G PATRICK | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| LYNCH G PATRICK | Sell | $128.5K | SEC |
| NIGON RICHARDtrack record | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| NIGON RICHARDtrack record | Sell | $96K | SEC |
| NIGON RICHARDtrack record | Exercise | $80.4K | SEC |
| WOLSFELD MATTHEW C | Other | $79.6K | SEC |
| WOLSFELD MATTHEW C | Exercise | $79.6K | SEC |
| WOLSFELD MATTHEW C | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |