Osser Leonard
- SEC CIK
- 0001188354
No open-market purchases or sales filed in the past year.
Current role at each company
- NXL Nexalin Technology, Inc.10% Owneras of Sep 30, 2025
- MLSS Milestone Scientific Inc.Directoras of Oct 23, 2024
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
- –
- 0 filings
- Sold
- –
- 0 filings
- Net
- –
- 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
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 20, 2022 (view filing)2:29 PM ET | Sep 16 | 4 days | Elson Marilyn and 1 otherMs. Elson serves as CFO | PPurchase | +36.0K | $4.15 | +$149.4K | +4.6%825.7K after | |
| Sep 20, 2022 (view filing)2:29 PM ET | Sep 16 | 4 days | Elson Marilyn and 1 otherMs. Elson serves as CFO | PPurchase | +100.0K | $0.40 | +$40.0K | –100.0K after | Derivative |
| Sep 29, 2022 (view filing)12:30 PM ET | Sep 28 | 1 day | Elson Marilyn and 1 otherMs. Elson serves as CFO | PPurchase | +9.50K | $1.12 | +$10.6K | +1.2%835.2K after | |
| Sep 25, 2024 (view filing)5:26 PM ET | Sep 28, 2022 | 728 days | Osser Leonard and 1 otherOther: Spouse | PPurchase | +36.0K | $0.40 | +$14.4K | –136.0K after | AmendedDerivative |
| Sep 12, 2025 (view filing)12:58 PM ET | Sep 10 | 2 days | Osser Leonard and 1 other10% Owner, Other: Spouse | SSale | −23.1K | $0.0174 | −$402.81 | –112.8K after | Derivative |
MLSS Milestone Scientific Inc.
Director23 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Dec 14, 2021 (view filing) | Dec 13-14 | 1 day | Osser LeonardDirector | SSaleCommon Stock, Par Value $0.001 | −4.20K | $1.93 | −$8.09K | −0.1%4.38M after | 2 lots |
| Dec 16, 2021 (view filing) | Dec 15-16 | 1 day | Osser LeonardDirector | SSale | −6.00K | $1.96 | −$11.8K | −0.1%4.37M after | 2 lots |
| Dec 21, 2021 (view filing) | Dec 20-21 | 1 day | Osser LeonardDirector | SSaleCommon Stock, Par Value $0.001 | −9.85K | $2.03 | −$19.9K | −0.2%4.36M after | 2 lots |
| Dec 28, 2021 (view filing) | Dec 27-28 | 1 day | Osser LeonardDirector | SSale | −9.60K | $2.09 | −$20.0K | −0.2%4.35M after | 2 lots |
| Jan 3, 2022 (view filing) | Jan 3 | Same day | Osser LeonardDirector | SSaleCommon Stock, Par Value $0.001 | −5.00K | $2.15 | −$10.8K | −0.1%4.44M after | |
| Jan 6, 2022 (view filing) | Jan 4 | 2 days | Osser LeonardDirector | SSale | −4.40K | $2.09 | −$9.20K | −0.1%4.44M after | |
| Jan 11, 2022 (view filing) | Jan 10-11 | 1 day | Osser LeonardDirector | SSaleCommon Stock, Par Value $0.001 | −9.90K | $2.02 | −$20.0K | −0.2%4.43M after | 2 lots |
| Jan 19, 2022 (view filing) | Jan 18-19 | 1 day | Osser LeonardDirector | SSaleCommon Stock, Par Value $0.001 | −11.6K | $1.72 | −$20.0K | −0.3%4.42M after | 2 lots |
| Jan 25, 2022 (view filing) | Jan 24-25 | 1 day | Osser LeonardDirector | SSaleCommon Stock, Par Value $0.001 | −13.8K | $1.45 | −$20.0K | −0.3%4.40M after | 2 lots |
| Feb 1, 2022 (view filing) | Jan 31-Feb 1 | 1 day | Osser LeonardDirector | SSale | −15.4K | $1.29 | −$20.0K | −0.4%4.39M after | 2 lots |