Milestone Scientific Inc. (MLSS) Insider Ownership

Historic Insider Ownership Trends

Over the 90-day window ending January 10, 2026, Milestone Scientific's three dominant insider ownership positions are held by Director Giandomenico Trombetta (10.42Mn shares), Director Leonard Osser (9.06Mn shares), TenPercentOwner S.R.L. Bp4 (8.90Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
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