Mark Warren
🏛️ Revolving DoorFormer Government Position:
ChfTaxCounsel, Sen Fin Comm; SrTaxCounsel, Sen Thune; TaxCounsel, Hs W&M Comm; DepAsstSec, Dept of Treas, Leg Affairs; ChfCounsel, Sen Repub Policy Comm; StaffDir and ChfCounsel, Sen Small Bus Comm; TaxAndFinanceCounsel, Sen Small Bus Comm
736
Total Filings
1
Firms
50
Clients
36
Issue Areas
Activity by Year
| Year | Filings | Clients |
|---|---|---|
| 2021 | 65 | 30 |
| 2022 | 152 | 40 |
| 2023 | 165 | 45 |
| 2024 | 160 | 45 |
| 2025 | 194 | 54 |
Firms
Brownstein Hyatt Farber Schreck, LLP736 filings
Top Clients
Highly Innovative Fuels27 filings
Monolith Materials, INC.22 filings
Pernod Ricard USA21 filings
Bloom Energy19 filings
Johnson & Johnson Services, INC.19 filings
T-mobile19 filings
Wynn Resorts, Limited19 filings
American Petroleum Institute19 filings
Apollo Global Management19 filings
National Automobile Dealers Association19 filings
Dell Technologies, INC.18 filings
Policy and Taxation Group18 filings
Nareit18 filings
Tiaa17 filings
American Public Power Association17 filings
Wolters Kluwer16 filings
Athene Holding16 filings
Clean Fuels Alliance America16 filings
Mgm Public Policy, LLC16 filings
Exxon Mobil Corp15 filings
Data Sources: Senate LDA Filings
Last updated: February 2026
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