Insiders / Osser Leonard
Osser Leonard
CIK 1188354personinsider
Companies
2
First seen
Mar 24, 2015
Last activity
Sep 30, 2025
Companies
| Company | Shares held | Latest |
|---|---|---|
| Milestone Scientific Inc. · MLSS | 9,055,580 | — |
| Nexalin Technology, Inc. · NXL | 1,618,577 | — |
All securities held
2 positions · latest reported per filing
Shares
| Company | Security | Shares |
|---|---|---|
| Milestone Scientific Inc. | Common stock | 9,055,580 |
| Nexalin Technology, Inc. | Common stock | 1,618,577 |
Ownership percentages elsewhere on the site count common and ordinary shares only, because that is what shares outstanding are measured in. Everything above is a real holding; not all of it is a share of the company.
Activity
InsidersInstitutions
This person's trades in company stock, across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Nov 9, 2021 | Exercise Option exercise | MLSS Milestone Scientific Inc. Common Stock, Par Value $0.001 | $330.9K | +171K +4.14% | 4,310,020 | low |
| Aug 4, 2020 | Other Other (per filing) | MLSS Milestone Scientific Inc. Common Stock, Par Value $0.001 | $280.0K | -133K -3.28% | 3,927,727 | low |
| Jan 4, 2021 | Sell Open-market sale | MLSS Milestone Scientific Inc. Common Stock, Par Value $0.001 | $165.3K |