SEC Form 4 · Updated Daily
USM
Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Therivel Laurent C | Director · Officer | 211,283 | 2025-04-04 | F |
| IRIZARRY MICHAEL | Director · Officer | 100,181 | 2025-07-30 | F |
| CARLSON WALTER CD | Director · Officer | 44,628 | 2025-08-01 | A |
| Stewart Cecelia D. | Director | 31,529 | 2024-05-21 | A |
| Lowell Kevin R | Officer | 22,977 | 2025-04-04 | F |
| JOSEFOWICZ GREGORY P | Director | 22,480 | 2025-06-02 | G |
| HARCZAK HARRY J JR | Director | 19,374 | 2025-08-18 | S |
| Chambers Douglas W | Director · Officer | 17,600 | 2025-08-12 | S |
| Iriarte Esteban C | Director | 9,553 | 2025-08-01 | A |
| Williams Xavier | Director | 6,862 | 2025-08-01 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2025-08-18 | HARCZAK HARRY J JR | Open-market sale | 1,960 | $76.20 | 19,374 |
| 2025-08-12 | Chambers Douglas W | Open-market sale | 93,300 | $75.77 | 17,600 |
| 2025-08-01 | Iriarte Esteban C | Grant / award | 1,960 | $73.50 | 9,553 |
| 2025-08-01 | Williams Xavier | Grant / award | 1,960 | $73.50 | 6,862 |
| 2025-08-01 | HARCZAK HARRY J JR | Grant / award | 1,960 | $73.50 | 21,334 |
| 2025-08-01 | CARLSON WALTER CD | Grant / award | 1,146 | $73.50 | 44,628 |
| 2025-08-01 | Chambers Douglas W | Grant / award (derivative) | 2,871 | — | 11,484 |
| 2025-08-01 | Chambers Douglas W | Option exercise (derivative) | 41,132 | — | 0 |
| 2025-08-01 | Chambers Douglas W | Option exercise (derivative) | 11,522 | — | 0 |
| 2025-08-01 | Chambers Douglas W | Disposition to issuer | 67,005 | $73.50 | 110,900 |
| 2025-08-01 | Chambers Douglas W | Option exercise | 67,005 | — | 177,905 |
| 2025-08-01 | Chambers Douglas W | Tax withholding | 19,333 | $73.50 | 110,900 |
| 2025-08-01 | Chambers Douglas W | Option exercise | 41,132 | — | 130,233 |
| 2025-08-01 | Chambers Douglas W | Tax withholding | 5,416 | $73.50 | 89,101 |
| 2025-08-01 | Chambers Douglas W | Option exercise | 11,522 | — | 94,517 |
| 2025-07-30 | IRIZARRY MICHAEL | Option exercise (derivative) | 18,683 | — | 0 |
| 2025-07-30 | IRIZARRY MICHAEL | Tax withholding | 14,895 | $72.13 | 100,181 |
| 2025-07-30 | IRIZARRY MICHAEL | Option exercise | 18,683 | $45.87 | 115,076 |
| 2025-06-02 | JOSEFOWICZ GREGORY P | Gift | 5,000 | $0.00 | 22,480 |
| 2025-04-28 | HARCZAK HARRY J JR | Gift | 2,900 | — | 19,374 |
| 2025-04-04 | Chambers Douglas W | Option exercise (derivative) | 20,374 | — | 0 |
| 2025-04-04 | Chambers Douglas W | Option exercise (derivative) | 22,389 | — | 0 |
| 2025-04-04 | Chambers Douglas W | Tax withholding | 9,577 | $64.48 | 82,995 |
| 2025-04-04 | Chambers Douglas W | Option exercise | 20,374 | — | 92,572 |
| 2025-04-04 | Chambers Douglas W | Tax withholding | 10,523 | $64.48 | 72,198 |
| 2025-04-04 | Chambers Douglas W | Option exercise | 22,389 | — | 82,721 |
| 2025-04-04 | Lowell Kevin R | Option exercise (derivative) | 9,686 | — | 0 |
| 2025-04-04 | Lowell Kevin R | Option exercise (derivative) | 10,642 | — | 0 |
| 2025-04-04 | Lowell Kevin R | Tax withholding | 3,957 | $64.48 | 22,977 |
| 2025-04-04 | Lowell Kevin R | Option exercise | 9,686 | — | 26,934 |
| 2025-04-04 | Lowell Kevin R | Tax withholding | 4,347 | $64.48 | 17,248 |
| 2025-04-04 | Lowell Kevin R | Option exercise | 10,642 | — | 21,595 |
| 2025-04-04 | IRIZARRY MICHAEL | Option exercise (derivative) | 24,952 | — | 0 |
| 2025-04-04 | IRIZARRY MICHAEL | Option exercise (derivative) | 27,419 | — | 0 |
| 2025-04-04 | IRIZARRY MICHAEL | Tax withholding | 11,055 | $64.48 | 96,393 |
| 2025-04-04 | IRIZARRY MICHAEL | Option exercise | 24,952 | — | 107,448 |
| 2025-04-04 | IRIZARRY MICHAEL | Tax withholding | 12,147 | $64.48 | 82,496 |
| 2025-04-04 | IRIZARRY MICHAEL | Option exercise | 27,419 | — | 94,643 |
| 2025-04-04 | Therivel Laurent C | Option exercise (derivative) | 66,656 | — | 0 |
| 2025-04-04 | Therivel Laurent C | Option exercise (derivative) | 73,248 | — | 0 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.