MAYER BROWN LLP

Law firm

1999 K Street NW Washington DC 20006, Washington, DC  ·  MICKEY LEIBNER

Filings
3,046
Clients
215
Total Income
$73,779,500
Years Active
2007–2026

Filings

Year Client Period Income Expenses Doc
2026 FREEDOM HOLDING CORP 1st Quarter (Jan 1 - Mar 31)
1st Quarter - Report
$80,000
2026 ONSEMI (ON SEMICONDUCTOR CORPORATION) 1st Quarter (Jan 1 - Mar 31)
1st Quarter - Report
$110,000
2026 CHUBB INA HOLDINGS, INC. (FORMERLY ACE INA HOLDINGS, INC.) 1st Quarter (Jan 1 - Mar 31)
1st Quarter - Report
2026 VISA INC. 1st Quarter (Jan 1 - Mar 31)
1st Quarter - Report
$10,000
2026 U.S. VENTURE, INC. (FORMERLY U.S. OIL) 1st Quarter (Jan 1 - Mar 31)
1st Quarter - Report
$40,000
2026 UNITED STATES STEEL CORPORATION 1st Quarter (Jan 1 - Mar 31)
1st Quarter - Report
$10,000
2026 STARR INSURANCE HOLDINGS, INC. 1st Quarter (Jan 1 - Mar 31)
1st Quarter - Report
$20,000
2026 SYENSQO USA LLC 1st Quarter (Jan 1 - Mar 31)
1st Quarter - Report
$10,000
2026 SUNIVA, INC. 1st Quarter (Jan 1 - Mar 31)
1st Quarter - Report
$50,000
2026 SOUTHWIRE COMPANY, LLC 1st Quarter (Jan 1 - Mar 31)
1st Quarter - Report (No Activity)
Page 1 of 50  ·  500 filings Next

Clients Represented

Lobbyists

NameDisclosed Prior Position
KRISTY L BALSANEK N/A
MARGARET L BASS N/A
JONATHAN BECKER Chief of Staff, Senator Amy Klobuchar (2010-13); Chief Counsel, Senator Amy Klobuchar (2007-09).
EMILY S BEIZER
MATTHEW BERNSTEIN
FRANCIS J BLANCHFIELD
ROBERT E BLOCH
BRIAN T BORDERS
MARC R COHEN N/A
SHEILA DEARYBURY
THOMAS J DELANEY N/A
DAVID F DOWD
PENNY LYNN EASTMAN N/A
LISA ELLMAN
ALLEN ERENBAUM N/A
DAVID B FINNEGAN N/A
JULIAN GEHMAN
KENNETH S GELLER
ANGELA GIANCARLO Chief of Staff and Senior Legal Advisor, Federal Communications Commission, 2007-2013.
MARK H GITENSTEIN N/A
ROBERT E GLENNON N/A
DANIEL HARDER Staff Assistant/Clerk - House Ways and Means 2014; Legislative Director -Rep. Mike Bishop 2015-2018
FRED W HARTMAN N/A
ROBERT A HELMAN
JAMES JOCHUM N/A
ERIKA Z JONES N/A
MICHAEL KANTOR Secy of Commerce (1996-97); USTR (1993-96)
TIMOTHY J KEELER USTR, Chief of Staff, 2006-2009US Treasury Department, Deputy to the Assistant Secretary of Legislative Affairs, 2001-2…
MICHAEL JOHNSON KELLEY Legislative Associate, Rep. Steven Buyer
KENNETH KLEIN
ALEX C LAKATOS
CHARLEY LANTER
DUANE W LAYTON N/A
MICHAEL A LEIBNER Intern, Senator Edward Kennedy (unpaid), 2006
JEFFREY H LEWIS N/A
KRISTA LINDHARD
MARCIA MADSEN N/A
JUSTIN J MCCARTHY
JANIE A MCCUTCHEN N/A
DAVID M MCINTOSH US House of Representatives (1995-January 2001)

Affiliated Organizations

ACE LIMITED
Zurich, CH
ALCON INC.
Geneva, CH
AMERICAN OPTOMETRIC ASSOCIATION
Alexandria, VA, US
AMERICAN PRESIDENT LINES, LLC
Washington, DC, US
ARKEMA INC.
King of Prussia, PA, US
AT&T
Washington, DC, US
BDO SEIDMAN, LLP
Chicago, IL, US
CENTURYTEL
Monroe, LA, US
CHAMPAIGN TELEPHONE COMPANY
Urbana, OH, US
CHUBB GROUP HOLDINGS, INC.
Philadelphia, PA, US
CONSOLIDATED COMMUNICATIONS, INC.
Mattoon, IL, US
COOPERVISION
Victor, NY, US
D&E COMMUNICATIONS, INC.
Ephrata, PA, US
DELOITTE & TOUCHE USA LLP
New York, NY, US
EMBARQ CORPORATION
Overland Park, KS, US
ERNST & YOUNG LLP
New York, NY, US
FAIRPOINT COMMUNICATIONS, INC.
Charlotte, NC, US
GALLIANO MARINE SERVICE, LLC
Cut Off, LA, US
GRANT THORNTON
Chicago, IL, US
GUADALUPE VALLEY TELEPHONE COOP.
New Braunfels, TX, US