Milestone Scientific Inc. (MLSS) has 20 known insider and institutional holders on record. The largest holder is Trombetta Giandomenico with 10,418,382 shares. Other notable holders include BP4 S.r.l. and OSSER LEONARD.
Over the last 12 months, insiders have made 34 transactions in MLSS stock — 0 buys (valued at RSU Award) and 34 sells (valued at $467.6K). Insider selling has exceeded buying during this period.
MLSS Insider Ownership
Top Holder
Trombetta Giandomenico
10,418,382 shares
Buys (12 mo)
0
$0.00 value
Sells (12 mo)
34
$467.6K value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Trombetta Giandomenico |
Director |
10,418,382 |
2024-08-30 |
|
| 2 |
Bp4 S.r.l. |
10 Percent Owner |
9,076,765 |
2025-10-29 |
|
| 3 |
Osser Leonard |
Director |
4,606,882 |
2024-10-23 |
|
| 4 |
Andersen K Tucker |
10 Percent Owner |
3,125,174 |
2013-08-13 |
|
| 5 |
Tynes Gary |
10 Percent Owner |
1,980,775 |
2003-11-05 |
|
| 6 |
Cumberland Associates Llc |
10 Percent Owner |
1,980,775 |
2003-11-05 |
|
| 7 |
Wilcox Bruce G |
10 Percent Owner |
1,980,775 |
2003-11-05 |
|
| 8 |
Rifkin Lawrence W |
10 Percent Owner |
1,980,775 |
2003-11-05 |
|
| 9 |
Wallach Andrew W |
10 Percent Owner |
1,980,775 |
2003-11-05 |
|
| 10 |
Goldman Neal I |
Director |
1,905,858 |
2024-08-30 |
|
| 11 |
D'agostino Joseph |
CFO & COO |
903,587 |
2021-01-13 |
|
| 12 |
Mcgeehan Michael |
Director |
575,273 |
2024-12-20 |
|
| 13 |
Schiller Leonard M |
Director |
434,449 |
2022-10-11 |
|
| 14 |
Casamento Benedetta I |
Director |
404,491 |
2024-08-30 |
|
| 15 |
Haverhals Jan Adriaan |
President |
319,546 |
2023-08-10 |
|
| 16 |
Martin Joe W |
Chief Executive Officer |
235,556 |
2009-03-03 |
|
| 17 |
Milligan Peter J |
President |
124,421 |
2023-08-10 |
|
| 18 |
Fuller Jeffrey |
Director |
90,000 |
2008-06-12 |
|
| 19 |
Bernhard Leslie |
Director |
79,268 |
2022-12-20 |
|
| 20 |
Zelnick Edward J. |
Director |
66,718 |
2019-11-22 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2025-10-24 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
100,000 |
$0.44 |
$43.98K |
| 2025-10-23 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
80,000 |
$0.43 |
$34.42K |
| 2025-10-22 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
14,427 |
$0.45 |
$6.49K |
| 2025-10-21 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
40,000 |
$0.44 |
$17.59K |
| 2025-10-20 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
24,034 |
$0.45 |
$10.88K |
| 2025-10-14 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
30,000 |
$0.54 |
$16.19K |
| 2025-10-13 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
10,000 |
$0.55 |
$5.5K |
| 2025-10-10 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
10,158 |
$0.55 |
$5.59K |
| 2025-10-08 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
30,000 |
$0.47 |
$13.95K |
| 2025-10-07 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
10,000 |
$0.45 |
$4.5K |
| 2025-10-03 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
10,000 |
$0.45 |
$4.5K |
| 2025-09-11 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
10,000 |
$0.59 |
$5.94K |
| 2025-07-17 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
10,000 |
$0.64 |
$6.4K |
| 2025-07-08 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
11,489 |
$0.69 |
$7.93K |
| 2025-07-07 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
30,558 |
$0.68 |
$20.8K |
| 2025-07-03 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
50,853 |
$0.67 |
$34.06K |
| 2025-06-30 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
649 |
$0.65 |
$421.85 |
| 2025-06-27 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
10,000 |
$0.73 |
$7.3K |
| 2025-06-25 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
1,300 |
$0.77 |
$1K |
| 2025-06-24 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
10,000 |
$0.81 |
$8.05K |
| 2025-06-23 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
5,933 |
$0.86 |
$5.1K |
| 2025-06-18 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
1,693 |
$0.88 |
$1.49K |
| 2025-06-16 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
10,056 |
$0.90 |
$9K |
| 2025-06-11 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
23,797 |
$0.90 |
$21.46K |
| 2025-06-10 |
Bp4 S.r.l. |
10 Percent Owner |
Informative Sell |
30,100 |
$0.91 |
$27.37K |
