Richard Nigon

Insider · Director · NTIC

Richard Nigon files insider transactions with the SEC as a director of Northern Technologies International (NTIC). We hold 1 disclosed purchase or sale filed since 3 March 2006, 1 of them in the last 90 days.

Files forNTIC
Disclosed buys and sells1 in all, 1 in the last 90 days
Last disclosure3 September 2026

Positions held

8 posts we hold — a term names its own dates; a run of filings only says when they filed

Filed 1 February 2010 — 1 September 2026Director · Northern Technologies International (NTIC)53 Form 4 lines · source: SEC Form 4
Filed 19 October 2017 — 5 June 2026Director · Celcuity (CELC)34 Form 4 lines · source: SEC Form 4
Filed 27 July 2016 — 17 May 2021Director · Tactile Systems Technology (TCMD)42 Form 4 lines · source: SEC Form 4
Filed 18 April 2006 — 17 February 2017Director · Vascular Solutions (VASC)49 Form 4 lines · source: SEC Form 4
Filed 14 November 2007 — 12 July 2010Director · Virtual Radiologic (VRAD)5 Form 4 lines · source: SEC Form 4
Filed 13 May 2010 — 13 May 2010Director · Virtual Radiologic (vrad)1 Form 4 line · source: SEC Form 4
Filed 16 May 2006 — 16 July 2008Director · Restore Medical (REST)6 Form 4 lines · source: SEC Form 4
Filed 24 February 2006 — 24 February 2006Director · Compex Technologies (CMPX)1 Form 4 line · source: SEC Form 4

Everything they disclosed

120 entries, newest first — one per disclosure report, one per Form 4 line

was granted 7,426 shares of Northern Technologies InternationalSEC Form 43 September 2026Common Stock · traded 1 September 2026 · filed 3 September 2026
exercised options over 12,000 shares of Northern Technologies InternationalSEC Form 421 July 2026Common Stock · traded 20 July 2026 · filed 21 July 2026
▼ sold on the open market 12,000 shares of Northern Technologies InternationalSEC Form 421 July 2026Common Stock · traded 20 July 2026 · filed 21 July 2026
exercised options over 12,000 shares of Northern Technologies International (a derivative holding)SEC Form 421 July 2026Stock Option (right to buy) · traded 20 July 2026 · filed 21 July 2026
was granted 1,530 shares of CelcuitySEC Form 49 June 2026Common Stock · traded 5 June 2026 · filed 9 June 2026
gave away 10,000 shares of CelcuitySEC Form 413 April 2026Common Stock · traded 9 April 2026 · filed 13 April 2026
gave away 19,975 shares of CelcuitySEC Form 49 January 2026Common Stock · traded 15 December 2025 · filed 9 January 2026
gave away 19,975 shares of CelcuitySEC Form 49 January 2026Common Stock · traded 15 December 2025 · filed 9 January 2026
exercised in-the-money options over 4,672 shares of Celcuity (a derivative holding)SEC Form 415 September 2025Warrants (right to buy) · traded 11 September 2025 · filed 15 September 2025
exercised in-the-money options over 3,245 shares of Celcuity (a derivative holding)SEC Form 415 September 2025Warrants (right to buy) · traded 11 September 2025 · filed 15 September 2025
exercised in-the-money options over 4,672 shares of CelcuitySEC Form 415 September 2025Common Stock · traded 11 September 2025 · filed 15 September 2025
exercised in-the-money options over 3,245 shares of CelcuitySEC Form 415 September 2025Common Stock · traded 11 September 2025 · filed 15 September 2025
was granted 8,086 shares of Northern Technologies InternationalSEC Form 43 September 2025Common Stock · traded 1 September 2025 · filed 3 September 2025
exercised options over 12,000 shares of Northern Technologies International (a derivative holding)SEC Form 428 July 2025Stock Option (right to buy) · traded 24 July 2025 · filed 28 July 2025
exercised options over 12,000 shares of Northern Technologies InternationalSEC Form 428 July 2025Common Stock · traded 24 July 2025 · filed 28 July 2025
had shares withheld for tax on 10,873 shares of Northern Technologies InternationalSEC Form 428 July 2025Common Stock · traded 24 July 2025 · filed 28 July 2025
was granted 14,048 shares of Celcuity (a derivative holding)SEC Form 421 May 2025Stock Option (right to buy) · traded 19 May 2025 · filed 21 May 2025
was granted 11,811 shares of Northern Technologies International (a derivative holding)SEC Form 44 September 2024Stock Option (right to buy) · traded 1 September 2024 · filed 4 September 2024
exercised options over 12,000 shares of Northern Technologies International (a derivative holding)SEC Form 42 August 2024Stock Option (right to buy) · traded 1 August 2024 · filed 2 August 2024
exercised options over 12,000 shares of Northern Technologies InternationalSEC Form 42 August 2024Common Stock · traded 1 August 2024 · filed 2 August 2024
had shares withheld for tax on 7,665 shares of Northern Technologies InternationalSEC Form 42 August 2024Common Stock · traded 1 August 2024 · filed 2 August 2024
exercised in-the-money options over 5,061 shares of Celcuity (a derivative holding)SEC Form 412 June 2024Warrants (right to buy) · traded 10 June 2024 · filed 12 June 2024
exercised in-the-money options over 5,061 shares of CelcuitySEC Form 412 June 2024Common Stock · traded 10 June 2024 · filed 12 June 2024
was granted 8,153 shares of Celcuity (a derivative holding)SEC Form 46 June 2024Stock Option (right to buy) · traded 4 June 2024 · filed 6 June 2024
was granted 11,905 shares of Northern Technologies International (a derivative holding)SEC Form 46 September 2023Stock Option (right to buy) · traded 1 September 2023 · filed 6 September 2023
exercised options over 12,000 shares of Northern Technologies International (a derivative holding)SEC Form 427 July 2023Stock Option (right to buy) · traded 26 July 2023 · filed 27 July 2023
exercised options over 12,000 shares of Northern Technologies InternationalSEC Form 427 July 2023Common Stock · traded 26 July 2023 · filed 27 July 2023
had shares withheld for tax on 7,153 shares of Northern Technologies InternationalSEC Form 427 July 2023Common Stock · traded 26 July 2023 · filed 27 July 2023
▼ sold on the open market 1,847 shares of Northern Technologies InternationalSEC Form 427 July 2023Common Stock · traded 27 July 2023 · filed 27 July 2023
was granted 11,645 shares of Celcuity (a derivative holding)SEC Form 417 May 2023Stock Option (right to buy) · traded 15 May 2023 · filed 17 May 2023
▲ bought on the open market 5,000 shares of CelcuitySEC Form 413 September 2022Common Stock · traded 9 September 2022 · filed 13 September 2022
was granted 12,371 shares of Northern Technologies International (a derivative holding)SEC Form 46 September 2022Stock Option (right to buy) · traded 1 September 2022 · filed 6 September 2022
▲ bought on the open market 754 shares of CelcuitySEC Form 426 May 2022Common Stock · traded 25 May 2022 · filed 26 May 2022
returned to the issuer 8,200 shares of Celcuity (a derivative holding)SEC Form 419 May 2022Stock Option (right to buy) · traded 17 May 2022 · filed 19 May 2022
was granted 8,200 shares of Celcuity (a derivative holding)SEC Form 419 May 2022Stock Option (right to buy) · traded 17 May 2022 · filed 19 May 2022
returned to the issuer 3,201 shares of Celcuity (a derivative holding)SEC Form 419 May 2022Stock Option (right to buy) · traded 17 May 2022 · filed 19 May 2022
was granted 3,201 shares of Celcuity (a derivative holding)SEC Form 419 May 2022Stock Option (right to buy) · traded 17 May 2022 · filed 19 May 2022
returned to the issuer 5,054 shares of Celcuity (a derivative holding)SEC Form 419 May 2022Stock Option (right to buy) · traded 17 May 2022 · filed 19 May 2022
was granted 5,054 shares of Celcuity (a derivative holding)SEC Form 419 May 2022Stock Option (right to buy) · traded 17 May 2022 · filed 19 May 2022
returned to the issuer 4,619 shares of Celcuity (a derivative holding)SEC Form 419 May 2022Stock Option (right to buy) · traded 17 May 2022 · filed 19 May 2022
was granted 4,619 shares of Celcuity (a derivative holding)SEC Form 419 May 2022Stock Option (right to buy) · traded 17 May 2022 · filed 19 May 2022
was granted 24,449 shares of Celcuity (a derivative holding)SEC Form 419 May 2022Stock Option (right to buy) · traded 17 May 2022 · filed 19 May 2022
was granted 8,230 shares of Northern Technologies International (a derivative holding)SEC Form 42 September 2021Stock Option (right to buy) · traded 1 September 2021 · filed 2 September 2021
was granted 2,490 shares of Tactile Systems TechnologySEC Form 419 May 2021Common Stock · traded 17 May 2021 · filed 19 May 2021
was granted 4,619 shares of Celcuity (a derivative holding)SEC Form 414 May 2021Stock Option (right to buy) · traded 12 May 2021 · filed 14 May 2021
was granted 19,231 shares of Northern Technologies International (a derivative holding)SEC Form 42 September 2020Stock Option (right to buy) · traded 1 September 2020 · filed 2 September 2020
was granted 25,308 shares of Celcuity (a derivative holding)SEC Form 418 May 2020Stock Option (right to buy) · traded 14 May 2020 · filed 18 May 2020
was granted 2,672 shares of Tactile Systems TechnologySEC Form 46 May 2020Common Stock · traded 4 May 2020 · filed 6 May 2020
gave away 1,200 shares of Tactile Systems TechnologySEC Form 43 January 2020Common Stock · traded 9 December 2019 · filed 3 January 2020
was granted 148 shares of Tactile Systems TechnologySEC Form 43 January 2020Common Stock · traded 31 December 2019 · filed 3 January 2020
was granted 236 shares of Tactile Systems TechnologySEC Form 42 October 2019Common Stock · traded 30 September 2019 · filed 2 October 2019
▼ sold on the open market 5,354 shares of Tactile Systems TechnologySEC Form 411 September 2019Common Stock · traded 9 September 2019 · filed 11 September 2019
▼ sold on the open market 4,583 shares of Tactile Systems TechnologySEC Form 411 September 2019Common Stock · traded 10 September 2019 · filed 11 September 2019
▼ sold on the open market 39 shares of Tactile Systems TechnologySEC Form 46 September 2019Common Stock · traded 4 September 2019 · filed 6 September 2019
▼ sold on the open market 1,900 shares of Tactile Systems TechnologySEC Form 46 September 2019Common Stock · traded 5 September 2019 · filed 6 September 2019
was granted 14,085 shares of Northern Technologies International (a derivative holding)SEC Form 44 September 2019Stock Option (right to buy) · traded 1 September 2019 · filed 4 September 2019
was granted 175 shares of Tactile Systems TechnologySEC Form 42 July 2019Common Stock · traded 28 June 2019 · filed 2 July 2019
was granted 5,054 shares of Celcuity (a derivative holding)SEC Form 420 May 2019Stock Option (right to buy) · traded 16 May 2019 · filed 20 May 2019
▼ sold on the open market 15,000 shares of Tactile Systems TechnologySEC Form 417 May 2019Common Stock · traded 15 May 2019 · filed 17 May 2019
was granted 2,154 shares of Tactile Systems TechnologySEC Form 413 May 2019Common Stock · traded 9 May 2019 · filed 13 May 2019
was granted 189 shares of Tactile Systems TechnologySEC Form 42 April 2019Common Stock · traded 29 March 2019 · filed 2 April 2019
was granted 219 shares of Tactile Systems TechnologySEC Form 43 January 2019Common Stock · traded 31 December 2018 · filed 3 January 2019
was granted 140 shares of Tactile Systems TechnologySEC Form 42 October 2018Common Stock · traded 28 September 2018 · filed 2 October 2018
▲ bought on the open market 9,747 shares of CelcuitySEC Form 413 September 2018Common Stock · traded 11 September 2018 · filed 13 September 2018
was granted 3,328 shares of Northern Technologies International (a derivative holding)SEC Form 45 September 2018Stock Option (right to buy) · traded 1 September 2018 · filed 5 September 2018
was granted 192 shares of Tactile Systems TechnologySEC Form 42 July 2018Common Stock · traded 29 June 2018 · filed 2 July 2018
▲ bought on the open market 10,000 shares of CelcuitySEC Form 44 June 2018Common Stock · traded 31 May 2018 · filed 4 June 2018
was granted 3,201 shares of Celcuity (a derivative holding)SEC Form 416 May 2018Stock Option (right to buy) · traded 14 May 2018 · filed 16 May 2018
was granted 1,373 shares of Tactile Systems TechnologySEC Form 414 May 2018Common Stock · traded 10 May 2018 · filed 14 May 2018
was granted 3,713 shares of Tactile Systems Technology (a derivative holding)SEC Form 414 May 2018Stock Option (right to buy) · traded 10 May 2018 · filed 14 May 2018
was granted 275 shares of Tactile Systems TechnologySEC Form 43 April 2018Common Stock · traded 30 March 2018 · filed 3 April 2018
was granted 301 shares of Tactile Systems TechnologySEC Form 43 January 2018Common Stock · traded 29 December 2017 · filed 3 January 2018
▲ bought on the open market 7,500 shares of CelcuitySEC Form 429 November 2017Common Stock · traded 28 November 2017 · filed 29 November 2017
▲ bought on the open market 7,500 shares of CelcuitySEC Form 422 November 2017Common Stock · traded 20 November 2017 · filed 22 November 2017
▲ bought on the open market 1,000 shares of CelcuitySEC Form 422 November 2017Common Stock · traded 21 November 2017 · filed 22 November 2017
was granted 8,200 shares of Celcuity (a derivative holding)SEC Form 423 October 2017Stock Option (right to buy) · traded 19 October 2017 · filed 23 October 2017
was granted 282 shares of Tactile Systems TechnologySEC Form 43 October 2017Common Stock · traded 29 September 2017 · filed 3 October 2017
exercised options over 1,500 shares of Northern Technologies InternationalSEC Form 48 September 2017Common Stock · traded 7 September 2017 · filed 8 September 2017
exercised options over 1,500 shares of Northern Technologies International (a derivative holding)SEC Form 48 September 2017Stock Option (right to buy) · traded 7 September 2017 · filed 8 September 2017
was granted 2,000 shares of Northern Technologies International (a derivative holding)SEC Form 45 September 2017Stock Option (right to buy) · traded 1 September 2017 · filed 5 September 2017
was granted 4,000 shares of Northern Technologies International (a derivative holding)SEC Form 45 September 2017Stock Option (right to buy) · traded 1 September 2017 · filed 5 September 2017
was granted 306 shares of Tactile Systems TechnologySEC Form 45 July 2017Common Stock · traded 30 June 2017 · filed 5 July 2017
was granted 2,306 shares of Tactile Systems TechnologySEC Form 411 May 2017Common Stock · traded 9 May 2017 · filed 11 May 2017
was granted 6,391 shares of Tactile Systems Technology (a derivative holding)SEC Form 411 May 2017Stock Option (right to buy) · traded 9 May 2017 · filed 11 May 2017
exercised options over 4,000 shares of Northern Technologies InternationalSEC Form 41 May 2017Common Stock · traded 27 April 2017 · filed 1 May 2017
exercised options over 4,000 shares of Northern Technologies International (a derivative holding)SEC Form 41 May 2017Stock Option (right to buy) · traded 27 April 2017 · filed 1 May 2017
was granted 461 shares of Tactile Systems TechnologySEC Form 44 April 2017Common Stock · traded 31 March 2017 · filed 4 April 2017
▲ bought on the open market 5,000 shares of Tactile Systems TechnologySEC Form 415 March 2017Common Stock · traded 13 March 2017 · filed 15 March 2017
▲ bought on the open market 5,000 shares of Tactile Systems TechnologySEC Form 415 March 2017Common Stock · traded 13 March 2017 · filed 15 March 2017
▲ bought on the open market 10,000 shares of Tactile Systems TechnologySEC Form 415 March 2017Common Stock · traded 13 March 2017 · filed 15 March 2017
returned to the issuer 61,228 shares of Vascular SolutionsSEC Form 422 February 2017Common Stock · traded 17 February 2017 · filed 22 February 2017
returned to the issuer 10,000 shares of Vascular Solutions (a derivative holding)SEC Form 422 February 2017Stock Option (Right to Buy) · traded 17 February 2017 · filed 22 February 2017
returned to the issuer 10,000 shares of Vascular Solutions (a derivative holding)SEC Form 422 February 2017Stock Option (Right to Buy) · traded 17 February 2017 · filed 22 February 2017
returned to the issuer 10,000 shares of Vascular Solutions (a derivative holding)SEC Form 422 February 2017Stock Option (Right to Buy) · traded 17 February 2017 · filed 22 February 2017
returned to the issuer 10,000 shares of Vascular Solutions (a derivative holding)SEC Form 422 February 2017Stock Option (Right to Buy) · traded 17 February 2017 · filed 22 February 2017
returned to the issuer 10,000 shares of Vascular Solutions (a derivative holding)SEC Form 422 February 2017Stock Option (Right to Buy) · traded 17 February 2017 · filed 22 February 2017
returned to the issuer 10,000 shares of Vascular Solutions (a derivative holding)SEC Form 422 February 2017Stock Option (Right to Buy) · traded 17 February 2017 · filed 22 February 2017
gave away 360 shares of Vascular SolutionsSEC Form 425 January 2017Common Stock · traded 23 January 2017 · filed 25 January 2017
was granted 533 shares of Tactile Systems TechnologySEC Form 44 January 2017Common Stock · traded 30 December 2016 · filed 4 January 2017
gave away 2,147 shares of Vascular SolutionsSEC Form 415 December 2016Common Stock · traded 13 December 2016 · filed 15 December 2016
exercised options over 6,103 shares of Tactile Systems TechnologySEC Form 415 December 2016Common Stock · traded 13 December 2016 · filed 15 December 2016
exercised options over 6,103 shares of Tactile Systems Technology (a derivative holding)SEC Form 415 December 2016Stock Option (right to buy) · traded 13 December 2016 · filed 15 December 2016
was granted 330 shares of Tactile Systems TechnologySEC Form 43 October 2016Common Stock · traded 30 September 2016 · filed 3 October 2016
▲ bought on the open market 1,935 shares of Tactile Systems TechnologySEC Form 415 September 2016Common Stock · traded 13 September 2016 · filed 15 September 2016
▲ bought on the open market 1,250 shares of Tactile Systems TechnologySEC Form 415 September 2016Common Stock · traded 13 September 2016 · filed 15 September 2016
▲ bought on the open market 9,000 shares of Tactile Systems TechnologySEC Form 415 September 2016Common Stock · traded 14 September 2016 · filed 15 September 2016
▲ bought on the open market 3,065 shares of Tactile Systems TechnologySEC Form 415 September 2016Common Stock · traded 14 September 2016 · filed 15 September 2016
▲ bought on the open market 175 shares of Tactile Systems TechnologySEC Form 415 September 2016Common Stock · traded 14 September 2016 · filed 15 September 2016
▲ bought on the open market 3,325 shares of Tactile Systems TechnologySEC Form 415 September 2016Common Stock · traded 14 September 2016 · filed 15 September 2016
was granted 2,000 shares of Northern Technologies International (a derivative holding)SEC Form 46 September 2016Stock Option (right to buy) · traded 1 September 2016 · filed 6 September 2016
was granted 4,000 shares of Northern Technologies International (a derivative holding)SEC Form 46 September 2016Stock Option (right to buy) · traded 1 September 2016 · filed 6 September 2016
converted 9,896 shares of Tactile Systems TechnologySEC Form 44 August 2016Common Stock · traded 2 August 2016 · filed 4 August 2016
converted 5,719 shares of Tactile Systems Technology (a derivative holding)SEC Form 44 August 2016Series B Preferred Stock · traded 2 August 2016 · filed 4 August 2016
was granted 5,000 shares of Tactile Systems TechnologySEC Form 429 July 2016Common Stock · traded 27 July 2016 · filed 29 July 2016
was granted 14,370 shares of Tactile Systems Technology (a derivative holding)SEC Form 429 July 2016Stock Option (Right to Buy) · traded 27 July 2016 · filed 29 July 2016
was granted 2,145 shares of Vascular SolutionsSEC Form 43 May 2016Common Stock · traded 29 April 2016 · filed 3 May 2016
had shares withheld for tax on 718 shares of Vascular SolutionsSEC Form 43 May 2016Common Stock · traded 1 May 2016 · filed 3 May 2016
exercised options over 10,000 shares of Vascular SolutionsSEC Form 412 February 2016Common Stock · traded 10 February 2016 · filed 12 February 2016
had shares withheld for tax on 2,200 shares of Vascular SolutionsSEC Form 412 February 2016Common Stock · traded 10 February 2016 · filed 12 February 2016
exercised options over 10,000 shares of Vascular Solutions (a derivative holding)SEC Form 412 February 2016Stock Option (Right to Buy) · traded 10 February 2016 · filed 12 February 2016

Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.