According to recent filings covering the 90 days ending February 15, 2026, the three most significant insider holders at Milestone Scientific are Director Giandomenico Trombetta (10.42Mn shares), Director Leonard Osser (9.06Mn shares), TenPercentOwner S.R.L. Bp4 (8.90Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Giandomenico Trombetta | 10,418,382 | 30 Aug, 2024 | |
| Leonard Osser | 9,055,580 | 23 Oct, 2024 | |
| S.R.L. Bp4 | 8,896,765 | 29 Oct, 2025 | |
| Neal I Goldman | 1,905,858 | 30 Aug, 2024 | |
| Michael Mcgeehan | 575,273 | 20 Dec, 2024 | |
| Benedetta I Casamento | 404,491 | 30 Aug, 2024 | |
| Leonard M Schiller | 338,412 | 15 Jun, 2022 | |
| Peter J Milligan | President | 124,421 | 10 Aug, 2023 |
| Leslie Bernhard | 79,268 | 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 |
|---|---|---|---|---|---|---|---|---|
| 24 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 100,000 | $0.44 | 8,896,765 | 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 |
| 22 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 14,427 | $0.45 | 9,076,765 | 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 |
| 20 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 24,034 | $0.45 | 9,131,192 | 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 |
| 13 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 10,000 | $0.55 | 9,175,226 | 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 |
| 08 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 30,000 | $0.46 | 9,195,384 | 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 |
| 03 Oct, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 10,000 | $0.45 | 9,235,384 | 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 |
| 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 |
| 08 Jul, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 11,489 | $0.69 | 9,308,799 | 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 |
| 03 Jul, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 50,853 | $0.67 | 9,350,846 | D | S |
| 30 Jun, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 649 | $0.65 | 9,417,608 | D | S |
| 27 Jun, 2025 | S.R.L. Bp4 | Common Stock, Par Value $0.001 | D | 10,000 | $0.73 | 9,418,257 | 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 |