Milestone Scientific's top three insider shareholders as of April 28, 2026 are Giandomenico Trombetta (Director, 10.42Mn shares), S.R.L. Bp4 (TenPercentOwner, 8.90Mn shares), Leonard Osser (Interim Ceo, 4.61Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Giandomenico Trombetta | - | 10,418,382 | 0 | 30 Aug, 2024 |
| S.R.L. Bp4 | - | 8,896,765 | 0 | 29 Oct, 2025 |
| Leonard Osser | Interim Ceo | 4,606,882 | 0 | 23 Oct, 2024 |
| Leonard Osser | - | 0 | 4,448,698 | 03 Jan, 2022 |
| Leonard Osser | Ceo | 4,388,548 | 0 | 01 Feb, 2022 |
| Leonard Osser | - | 0 | 4,381,260 | 02 Dec, 2021 |
| Neal I Goldman | - | 1,905,858 | 0 | 30 Aug, 2024 |
| Michael Mcgeehan | - | 575,273 | 0 | 20 Dec, 2024 |
| Benedetta I Casamento | - | 404,491 | 0 | 30 Aug, 2024 |
| Leonard M Schiller | - | 338,412 | 0 | 15 Jun, 2022 |
| Peter J Milligan | President | 124,421 | 0 | 10 Aug, 2023 |
| Leslie Bernhard | - | 79,268 | 0 | 19 Dec, 2022 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 22 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 14,427 | $0.45 | 9,076,765 | D | S |
| 23 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 80,000 | $0.43 | 8,996,765 | D | S |
| 24 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 100,000 | $0.44 | 8,896,765 | D | S |
| 20 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 24,034 | $0.45 | 9,131,192 | D | S |
| 21 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 40,000 | $0.44 | 9,091,192 | D | S |
| 10 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 10,158 | $0.55 | 9,185,226 | D | S |
| 13 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 10,000 | $0.55 | 9,175,226 | D | S |
| 14 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 30,000 | $0.54 | 9,155,226 | D | S |
| 07 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 10,000 | $0.45 | 9,225,384 | D | S |
| 08 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 30,000 | $0.47 | 9,195,384 | D | S |
| 03 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 9,210 | $0.45 | 9,245,384 | D | S |
| 03 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 10,000 | $0.45 | 9,235,384 | D | S |
| 11 Sep, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 10,000 | $0.59 | 9,256,972 | D | S |
| 17 Jul, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 10,000 | $0.64 | 9,298,724 | D | S |
| 03 Jul, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 50,853 | $0.67 | 9,350,846 | D | S |
| 07 Jul, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 30,558 | $0.68 | 9,320,288 | D | S |
| 08 Jul, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 11,489 | $0.69 | 9,308,799 | D | S |
| 23 Jun, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 5,933 | $0.86 | 9,439,557 | D | S |
| 24 Jun, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 10,000 | $0.81 | 9,429,577 | D | S |
| 25 Jun, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 1,300 | $0.77 | 9,438,257 | D | S |