Form4insider filings, from the source

Insider · CIK 0001213869

Richard Nigon

Files at: NTIC, CELC, TCMD, VASC. On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $96k · 1net −$96k
$10k$10k$100k$100k$1M$1MbuyssalesJun 28Jul 13Jul 28Aug 13Aug 28Sep 12Sep 28

Reported trades — common stock

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Sep 1, 2026 AForm 4 →Sep 3, 4:26 pm EDTNORTHERN TECHNOLOGIES INTERNATIONAL CORPNTIC7,426——54,574—
Jul 20, 2026 SForm 4 →Jul 21, 4:28 pm EDTNORTHERN TECHNOLOGIES INTERNATIONAL CORPNTIC12,000$8.00$96,04847,148−20.3%
Jul 20, 2026 MForm 4 →Jul 21, 4:28 pm EDTNORTHERN TECHNOLOGIES INTERNATIONAL CORPNTIC12,000$6.70$80,40059,148—

Reported trades — derivatives (options, RSUs, warrants)

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Jul 20, 2026 MForm 4 →Jul 21, 4:28 pm EDTNORTHERN TECHNOLOGIES INTERNATIONAL CORPNTIC12,000——0—