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Osser Leonard

No open-market purchases or sales filed in the past year.

Current role at each company

Open-market trades in the past year

Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.

Bought
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0 filings
Sold
–
0 filings
Net
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Bought minus sold
Companies
0
With open-market trades

Trades

Every Form 4 that lists Osser Leonard as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.

NXL Nexalin Technology, Inc.

10% Owner5 trades

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 12, 2025 (view filing)12:58 PM ETSep 102 daysOsser Leonard and 1 other10% Owner, Other: SpouseSSale−23.1K$0.0174−$402.81–112.8K afterDerivative
Sep 25, 2024 (view filing)5:26 PM ETSep 28, 2022728 daysOsser Leonard and 1 otherOther: SpousePPurchase+36.0K$0.40+$14.4K–136.0K afterAmendedDerivative
Sep 29, 2022 (view filing)12:30 PM ETSep 281 dayElson Marilyn and 1 otherMs. Elson serves as CFOPPurchase+9.50K$1.12+$10.6K+1.2%835.2K after
Sep 20, 2022 (view filing)2:29 PM ETSep 164 daysElson Marilyn and 1 otherMs. Elson serves as CFOPPurchase+36.0K$4.15+$149.4K+4.6%825.7K after
Sep 20, 2022 (view filing)2:29 PM ETSep 164 daysElson Marilyn and 1 otherMs. Elson serves as CFOPPurchase+100.0K$0.40+$40.0K–100.0K afterDerivative

MLSS Milestone Scientific Inc.

Director23 trades

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Oct 23, 2024 (view filing)Oct 221 dayOsser LeonardDirectorSSaleCommon Stock, Par Value $0.001−108.0K$0.93−$100.4K−2.3%4.61M after
Aug 21, 2024 (view filing)Aug 21Same dayOsser LeonardDirectorSSaleCommon Stock, Par Value $0.001−141.9K$0.95−$134.8K−3.0%4.60M after
Apr 20, 2022 (view filing)Apr 182 daysOsser LeonardDirectorSSaleCommon Stock, Par Value $0.001−9.84K$1.12−$11.0K−0.2%4.23M after
Apr 13, 2022 (view filing)Apr 11-122 daysOsser LeonardDirectorSSaleCommon Stock, Par Value $0.001−16.7K$1.19−$20.0K−0.4%4.24M after2 lots
Apr 4, 2022 (view filing)Apr 1-43 daysOsser LeonardDirectorSSaleCommon Stock, Par Value $0.001−20.1K$1.45−$29.1K−0.5%4.25M after2 lots
Mar 29, 2022 (view filing)Mar 281 dayOsser LeonardDirectorSSaleCommon Stock, Par Value $0.001−7.11K$1.33−$9.46K−0.2%4.27M after
Mar 22, 2022 (view filing)Mar 21-221 dayOsser LeonardDirectorSSaleCommon Stock, Par Value $0.001−15.6K$1.28−$20.0K−0.4%4.28M after2 lots
Mar 15, 2022 (view filing)Mar 14-151 dayOsser LeonardDirectorSSaleCommon Stock, Par Value $0.001−16.6K$1.20−$20.0K−0.4%4.29M after2 lots
Mar 8, 2022 (view filing)Mar 7-81 dayOsser LeonardDirectorSSaleCommon Stock, Par Value $0.001−13.9K$1.43−$19.9K−0.3%4.31M after2 lots
Mar 2, 2022 (view filing)Feb 28-Mar 12 daysOsser LeonardDirectorSSaleCommon Stock, Par Value $0.001−15.1K$1.32−$20.0K−0.3%4.33M after2 lots

See all 23 trades at MLSS