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MW

MARK WARREN

CAPITOL TAX PARTNERS, LLP · Washington, DC
Registered · LDAActive

At a glance

Works on
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Background

Career
Washington, DC · current
Government experience
ChfTaxCounsel
Sen Fin Comm; SrTaxCounsel, Sen Thune; TaxCounsel, House 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
Covered official positions, as disclosed on federal filings

The past 12 months

Clients
8
past 12 months
Filings
10
past 12 months
Agencies contacted
HOUSE OF REPRESENTATIVESSENATEExecutive Office of the President (EOP)Natl Economic Council (NEC)Treasury, Dept of

Specific issues

Issures related to remittance transfers excise tax.
Taxation/Internal Revenue Code · 2026 Q3
Issues related to Federal income tax paid by movie studios.
Taxation/Internal Revenue Code · 2026 Q2
Financial services tax issues.
Taxation/Internal Revenue Code · 2026 Q2
Legislative and administrative services related to energy tax policy.
Taxation/Internal Revenue Code · 2026 Q2
Legislative services related to corporate and international tax matters.
Taxation/Internal Revenue Code · 2026 Q2
Issues related to insurance, corporate and international tax.
Taxation/Internal Revenue Code · 2026 Q2

Clients

2026 · 1 filing
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2026 · 1 filing
$██,███ / qtrFree in beta
2026 · 1 filing
$██,███ / qtrFree in beta
2026 · 1 filing
$██,███ / qtrFree in beta
2026 · 1 filing
$██,███ / qtrFree in beta
2026 · 2 filings
$██,███ / qtrFree in beta
$██,███ / qtrFree in beta
2026 · 1 filing
$██,███ / qtrFree in beta

Sources

This profile is built from the public record: filings in the U.S. Senate Lobbying Disclosure Act system. lda.senate.gov ↗

Recent filings10
2026 Q3
REMITLY, INC.
RRlda.gov →
2026 Q2
PARAMOUNT GLOBAL
Q2lda.gov →
2026 Q2
FMR LLC
Q2lda.gov →
2026 Q2
AVANGRID
Q2lda.gov →
2026 Q2
ABBVIE
Q2lda.gov →
2026 Q2
TAX FAIRNESS FOR AMERICANS ABROAD
Q2lda.gov →
2026 Q2
LOCKTON COMPANIES, LLC
Q2lda.gov →
2026 Q2
APOLLO GLOBAL MANAGEMENT
Q2lda.gov →
2026 Q2
APOLLO GLOBAL MANAGEMENT
RRlda.gov →
2026 Q2
TAX FAIRNESS FOR AMERICANS ABROAD
RRlda.gov →