Matthew Mackowiak is named as a lobbyist on federal disclosure filings for 2 clients through Core Natural Resources, Inc. and 1 other registrant. The most recent filing naming them posted in October 2026. Issues reported include Budget/Appropriations, Energy/Nuclear, Labor Issues/Antitrust/Workplace and Trade (domestic/foreign).
| Client | Registrant | Latest | Issues |
|---|---|---|---|
| CORE NATURAL RESOURCES, INC. | CORE NATURAL RESOURCES, INC. | Q3 2026 | Trade (domestic/foreign), Labor Issues/Antitrust/Workplace, Budget/Appropriations |
| CONSOL ENERGY INC | CONSOL ENERGY, INC | Q1 2025 | Trade (domestic/foreign), Labor Issues/Antitrust/Workplace, Budget/Appropriations |
| Year | Clients | Registrants |
|---|---|---|
| 2026 | 1 | 1 |
| 2025 | 2 | 2 |
Pay is not disclosed for individual lobbyists. Filings do not confirm that records with the same name are one person, so this page may combine people who share the name Matthew Mackowiak. See the Capitol Clarity rankings and method.