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Osser Leonard insider trades
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Osser Leonard insider trades

Osser Leonard has filed 35 Form 4s with the SEC that we hold, for Milestone Scientific INC. (MLSS) (Director) and Nexalin Technology, Inc. (NXL) (10% owner). Across all of them we count 2 purchases worth $160.0K and 40 sales worth $604.3K reported on Form 4. None of these purchases or sales is dated in the last 12 months. The largest single trade was a purchase of 36,000 shares of Nexalin Technology, Inc. worth $149.4K, dated 2022-09-16. The first filing on our record is dated 2021-11-12 and the latest 2025-09-30.

Milestone Scientific INC. (MLSS)

Director · 29 filings · 40 purchases and sales
Trade dateCodeSharesValue as filedFiled
2021-12-13S, sale reported on Form 42,100$4.1K2021-12-14
2021-12-14S, sale reported on Form 42,100$3.9K2021-12-14
2021-12-15S, sale reported on Form 42,100$4.1K2021-12-16
2021-12-16S, sale reported on Form 43,900$7.7K2021-12-16
2021-12-20S, sale reported on Form 45,000$10.1K2021-12-21
2021-12-21S, sale reported on Form 44,850$9.8K2021-12-21
2021-12-27S, sale reported on Form 44,600$9.4K2021-12-28
2021-12-28S, sale reported on Form 45,000$10.6K2021-12-28
2022-01-03S, sale reported on Form 45,000$10.8K2022-01-03
2022-01-04S, sale reported on Form 44,400$9.2K2022-01-06
2022-01-10S, sale reported on Form 45,000$10.1K2022-01-11
2022-01-11S, sale reported on Form 44,900$9.9K2022-01-11
2022-01-18S, sale reported on Form 45,800$10.0K2022-01-19
2022-01-19S, sale reported on Form 45,800$10.0K2022-01-19
2022-01-24S, sale reported on Form 47,200$10.0K2022-01-25
2022-01-25S, sale reported on Form 46,600$10.0K2022-01-25
2022-01-31S, sale reported on Form 47,800$9.9K2022-02-01
2022-02-01S, sale reported on Form 47,650$10.1K2022-02-01
2022-02-07S, sale reported on Form 48,000$10.1K2022-02-08
2022-02-08S, sale reported on Form 47,600$9.9K2022-02-08
2022-02-14S, sale reported on Form 48,400$10.0K2022-02-15
2022-02-15S, sale reported on Form 48,100$10.0K2022-02-15
2022-02-22S, sale reported on Form 47,700$9.9K2022-02-23
2022-02-23S, sale reported on Form 48,200$10.0K2022-02-23
2022-02-28S, sale reported on Form 47,500$10.0K2022-03-02
2022-03-01S, sale reported on Form 47,600$10.0K2022-03-02
2022-03-07S, sale reported on Form 46,400$9.8K2022-03-08
2022-03-08S, sale reported on Form 47,500$10.1K2022-03-08
2022-03-14S, sale reported on Form 48,100$10.0K2022-03-15
2022-03-15S, sale reported on Form 48,500$10.0K2022-03-15
2022-03-21S, sale reported on Form 47,600$9.9K2022-03-22
2022-03-22S, sale reported on Form 48,000$10.1K2022-03-22
2022-03-28S, sale reported on Form 47,110$9.5K2022-03-29
2022-04-01S, sale reported on Form 46,000$9.1K2022-04-04
2022-04-04S, sale reported on Form 414,100$20.0K2022-04-04
2022-04-11S, sale reported on Form 48,200$9.9K2022-04-13
2022-04-12S, sale reported on Form 48,500$10.0K2022-04-13
2022-04-18S, sale reported on Form 49,842$11.0K2022-04-20
2024-08-21S, sale reported on Form 4141,913$134.8K2024-08-21
2024-10-22S, sale reported on Form 4107,984$100.4K2024-10-23

Nexalin Technology, Inc. (NXL)

10% owner · 6 filings · 2 purchases and sales
Trade dateCodeSharesValue as filedFiled
2022-09-16P, purchase reported on Form 436,000$149.4K2022-09-20
2022-09-28P, purchase reported on Form 49,500$10.6K2022-09-29
Source

Counted from the Form 4 filings this reporting owner (SEC CIK 1188354) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.

Source: U.S. Securities and Exchange Commission (EDGAR) and other official government data · Updated 2026-10-12 · For informational purposes only, not investment advice.
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