Comparable stake leader
BP4 S.r.l.
SEC ownership of MILESTONE SCIENTIFIC INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000855683.
Disclosed value leader
Giandomenico Trombetta
Comparable rows
32/41
Latest evidence
31 Mar 2026
- Public ticker
- MLSS on NYSE
- Parsed ownership sources
- 13D/G, 3/4/5, and 13F
- Largest SEC-reported holder
- BP4 S.r.l.
- Latest 13D/G holder
- BP4 S.r.l.
- Latest parsed ownership date
- 31 Mar 2026
- Issuer CIK
- 0000855683
- Issuer location
- Livingston, NJ
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of MILESTONE SCIENTIFIC INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BP4 S.r.l.
Disclosed value leader
Giandomenico Trombetta
Comparable rows
32/41
Latest evidence
31 Mar 2026
13D/G
3/4/5
13F
Lead comparable stake: 12%
9 rows are not safely comparable across share classes.
13D/G row: BP4 S.r.l.
Showing 1-8 of 41 holder rows.
Quick read
BP4 S.r.l. leads the comparable SEC ownership view at 12%.
32 of 41 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BP4 S.r.l.'s linked filing trail.
Comparable ownership
Top 5
BP4 S.r.l.
12%
VANGUARD CAPITAL MANAGEMENT LLC
2.5%
GEODE CAPITAL MANAGEMENT, LLC
0.79%
VANGUARD FIDUCIARY TRUST CO
0.41%
CITADEL ADVISORS LLC
0.21%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 41 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BP4 S.r.l. |
13D/G
3/4/5
10%+ Owner
|
12%
|
$9,020,286
9,672,192 shares
|
$0 | 01 Feb 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
2.5%
|
$572,155
1,986,648 shares
|
— | 31 Mar 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
0.79%
|
$177,637
616,645 shares
|
— | 31 Mar 2026 |
| VANGUARD FIDUCIARY TRUST CO |
13F
Company
|
0.41%
|
$92,616
321,583 shares
|
— | 31 Mar 2026 |
| CITADEL ADVISORS LLC |
13F
Company
|
0.21%
|
$48,135
167,135 shares
|
— | 31 Mar 2026 |
| STATE STREET CORP |
13F
Company
|
0.18%
|
$40,287
139,885 shares
|
— | 31 Mar 2026 |
| LPL Financial LLC |
13F
Company
|
0.16%
|
$35,984
124,945 shares
|
— | 31 Mar 2026 |
| Mariner, LLC |
13F
Company
|
0.16%
|
$35,064
121,750 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$426,586.
Buys
$0
Insiders: 0
Sells
$426,586
Insiders: 1
Net
-$426,586
Shares: -687,578
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 687,578
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 377,829 | $0 | $173,655 | -$173,655 |
| 9-12 | 0 | 309,749 | $0 | $252,930 | -$252,930 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-11 of 11 reporting-owner rows connected to MILESTONE SCIENTIFIC INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
11
Largest Forms 3/4/5 holder
Giandomenico Trombetta
Net 12M change
-$421,118
Latest report
22 Oct 2025
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Giandomenico Trombetta | Director | $9,272,360 | Mixed | 28 Aug 2024 | ||
| Leonard Osser | Director | $4,284,400 | Filing P/S | 22 Oct 2024 | ||
| BP4 S.r.l. | 10%+ Owner | $3,912,797 | -$421,118 | -9.7% | Filing P/S | 22 Oct 2025 |
| Neal I. Goldman | Director | $1,696,214 | Mixed | 28 Aug 2024 | ||
| Michael McGeehan | Director | $446,757 | Filing P/S | 19 Dec 2024 | ||
| Benedetta I. Casamento | Director | $359,997 | Mixed | 28 Aug 2024 | ||
| Leonard M. Schiller | Director | $273,703 | Mixed | 13 Jun 2022 | ||
| Jan Adriaan Haverhals | President | $201,314 | Mixed | 17 May 2023 | ||
| Peter J. Milligan | President | $78,385 | Mixed | 01 Aug 2023 | ||
| Leslie Bernhard | Director | $49,939 | Mixed | 19 Dec 2022 | ||
| Scott L. Kahn | Chief Financial Officer | Mixed | 24 May 2021 |
Recent insider transactions for MILESTONE SCIENTIFIC INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -1.11% | $43,980 | $0.4398 | -100,000 | 8,896,765 | 24 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.88% | $34,416 | $0.4302 | -80,000 | 8,996,765 | 23 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.16% | $6,488 | $0.4497 | -14,427 | 9,076,765 | 22 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.44% | $17,592 | $0.4398 | -40,000 | 9,091,192 | 21 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.26% | $10,880 | $0.4527 | -24,034 | 9,131,192 | 20 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.33% | $16,185 | $0.5395 | -30,000 | 9,155,226 | 14 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.11% | $5,500 | $0.5500 | -10,000 | 9,175,226 | 13 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.11% | $5,588 | $0.5501 | -10,158 | 9,185,226 | 10 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.33% | $13,950 | $0.4650 | -30,000 | 9,195,384 | 08 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.11% | $4,500 | $0.4500 | -10,000 | 9,225,384 | 07 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.21% | $8,636 | $0.4496 | -19,210 | 9,235,384 | 03 Oct 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.11% | $5,940 | $0.5940 | -10,000 | 9,256,972 | 11 Sep 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.11% | $6,400 | $0.6400 | -10,000 | 9,298,724 | 17 Jul 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.12% | $7,933 | $0.6905 | -11,489 | 9,308,799 | 08 Jul 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.33% | $20,804 | $0.6808 | -30,558 | 9,320,288 | 07 Jul 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.54% | $34,061 | $0.6698 | -50,853 | 9,350,846 | 03 Jul 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.01% | $422 | $0.6500 | -649 | 9,417,608 | 30 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.11% | $7,300 | $0.7300 | -10,000 | 9,418,257 | 27 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.01% | $1,001 | $0.7700 | -1,300 | 9,438,257 | 25 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.11% | $8,054 | $0.8054 | -10,000 | 9,429,577 | 24 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.06% | $5,105 | $0.8604 | -5,933 | 9,439,557 | 23 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.02% | $1,490 | $0.8800 | -1,693 | 9,445,490 | 18 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.11% | $9,001 | $0.8951 | -10,056 | 9,447,183 | 16 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.25% | $21,465 | $0.9020 | -23,797 | 9,457,239 | 11 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.32% | $27,373 | $0.9094 | -30,100 | 9,481,036 | 10 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.21% | $18,341 | $0.9050 | -20,266 | 9,511,136 | 09 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.63% | $54,264 | $0.9014 | -60,200 | 9,531,402 | 06 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.28% | $24,449 | $0.9104 | -26,855 | 9,591,602 | 05 Jun 2025 | Direct |
| BP4 S.r.l. | MLSS | Common Stock, Par Value $0.001 | Sale | -0.06% | $5,468 | $0.9113 | -6,000 | 9,618,457 | 04 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.