Costanzo Brian J.
Officer · MKL
As of 2026-09-17, Costanzo Brian J. has 13 Form 4 transactions on record across 1 company — 8 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
- Direct $2.9M
- Indirect $0
| MKL | direct | 1,632 sh | $2.9M |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|
13 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-06-30 | MKL | Other acquisition | 2 | 1,632 | Form 4 |
| 2026-05-15 | MKL | Other acquisition | 30 | 1,630 | Form 4 |
| 2026-05-15 | MKL | Withheld for tax | 13 | 1,600 | Form 4 |
| 2026-03-31 | MKL | Other acquisition | 2 | 1,613 | Form 4 |
| 2026-02-24 | MKL | Award / grant | 655 | 1,611 | Form 4 |
| 2025-12-31 | MKL | Other acquisition | 2 | 957 | Form 4 |
| 2025-12-02 | MKL | Withheld for tax | 22 | 954 | Form 4 |
| 2025-09-30 | MKL | Other acquisition | 2 | 976 | Form 4 |
| 2025-06-30 | MKL | Other acquisition | 2 | 974 | Form 4 |
| 2025-03-31 | MKL | Other acquisition | 2 | 972 | Form 4 |
| 2025-02-18 | MKL | Award / grant | 379 | 970 | Form 4 |
| 2024-12-31 | MKL | Other acquisition | 2 | 591 | Form 4 |
| 2024-12-05 | MKL | Withheld for tax | 21 | 588 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.