| 5058 ASTOR PL SE LLC | — | L00006779566 | 2020-10-24 | Revoked | |
| 5058 Astor Place SE Tenants Association | — | N00005824814 | 2017-11-29 | Revoked | |
| 5058 Astor Place SE Tenants Association | — | N00005824814 | 2017-11-29 | Revoked | Washington |
| 5058 JUST ST. LLC | — | L19078 | 2004-05-21 | Revoked | |
| 5058 JUST ST. LLC | — | L19078 | 2004-05-21 | Revoked | |
| 506 34TH LLC | — | L41521 | 2008-12-05 | Active | |
| 506 34TH LLC | — | L41521 | 2008-12-05 | Active | WASHINGTON |
| 506 Columbia Road LLC | — | L00006388951 | 2019-09-13 | Revoked | |
| 506 Columbia Road LLC | — | L00006388951 | 2019-09-13 | Revoked | Chevy Chase |
| 506 Downtown Alley LLC | — | L00004832873 | 2013-12-18 | Active | |
| 506 Downtown Alley LLC | — | L00004832873 | 2013-11-08 | Revoked | Bethesda |
| 506 H ST LLC | — | L00007472538 | 2022-09-21 | Dissolved | Washington |
| 506 H ST LLC | — | L00007472538 | 2022-09-28 | Active | |
| 506 LONGFELLOW STREET L.L.C. | — | L21524 | 2004-12-16 | Dissolved | |
| 506 LONGFELLOW STREET L.L.C. | — | L21524 | 2004-12-16 | Dissolved | |
| 506 LONGFELLOW STREET TENANT'S ASSOCIATION INC. | — | 250483 | 2005-02-15 | Revoked | |
| 506 LONGFELLOW STREET TENANT'S ASSOCIATION INC. | — | 250483 | 2005-02-15 | Revoked | |
| 506 MANAGEMENT LLC | — | L00008540192 | 2025-10-06 | Active | |
| 506 MANAGEMENT LLC | — | L00008540192 | 2025-10-06 | Revoked | WASHINGTON |
| 506 Quackenbos LLC | — | US-DC-LL012600804 | 2026-01-13 | Active | Washington |
| 5061 FIRST BENEFICIARY LLC | — | L20269 | 2004-08-27 | Active | |
| 5061 FIRST BENEFICIARY LLC | — | L20269 | 2004-08-27 | Active | GAITHERSBURG |
| 5061 FIRST TRUSTEE LLC | — | L20263 | 2004-08-27 | Active | |
| 5061 FIRST TRUSTEE LLC | — | L20263 | 2004-08-27 | Active | GAITHERSBURG |
| 5061 JAY STREET, LLC | — | L00004681614 | 2013-02-21 | Revoked | |
| 5061 JAY STREET, LLC | — | L00004681614 | 2013-02-21 | Revoked | WASHINGTON |
| 5065 SHERIER PL LLC | — | L00008201680 | 2024-11-11 | Active | Washington |
| 5065 SHERIER PL LLC | — | L00008201680 | 2024-11-11 | Active | |
| 5066 BENNING ROAD LLC | — | L0000052403 | 2011-03-28 | Canceled | |
| 5066 BENNING ROAD LLC | — | L0000052403 | 2011-04-11 | Canceled | Wilmington |
| 5068 Sherier Place L.L.C. | — | L00006864776 | 2021-02-15 | Active | |
| 5068 Sherier Place L.L.C. | — | L00006864776 | 2021-02-15 | Revoked | Washington |
| 507 11th Street SE, L.L.C. | — | L00006398487 | 2019-09-25 | Active | Washington |
| 507 11th Street SE, L.L.C. | — | L00006398487 | 2019-09-30 | Active | |
| 507 8th St SE DC LLC | — | L00007087844 | 2021-08-18 | Active | |
| 507 8th St SE DC LLC | — | L00007087844 | 2021-08-18 | Active | WASHINGTON |
| 507 ALABAMA AVE DC LLC | — | L46224 | 2009-09-24 | Revoked | |
| 507 ALABAMA AVE DC LLC | — | L46224 | 2009-09-24 | Revoked | |
| 507 CAPITOL COURT N.E. ASSOCIATES, LIMITED PARTNERSHIP | — | 12801 | 1986-05-30 | Dissolved | LEGACY NO DATA |
| 507 CAPITOL COURT N.E. ASSOCIATES, LIMITED PARTNERSHIP | — | 12801 | 1986-05-30 | Dissolved | |
| 507 CAPITOL COURT N.E. LLC | — | L02033 | 1997-12-10 | Dissolved | |
| 507 CAPITOL COURT N.E. LLC | — | L02033 | 1997-12-10 | Dissolved | Alexandria |
| 507 Ethan Allen / Triangle investments LLC | — | L00007059343 | 2021-07-17 | Revoked | |
| 507 Ethan Allen / Triangle investments LLC | — | L00007059343 | 2021-07-17 | Revoked | washington |
| 507 FAIRMONT CORPORATION | — | 801585 | 1980-04-11 | Revoked | |
| 507 FAIRMONT CORPORATION | — | 801585 | 1980-04-11 | Revoked | |
| 507 H STREET LLC | — | L32612 | 2007-03-19 | Revoked | |
| 507 H STREET LLC | — | L32612 | 2007-03-19 | Revoked | |
| 507 K LLC | — | L00005318195 | 2016-01-06 | Revoked | |
| 507 K LLC | — | L00005318195 | 2016-01-06 | Revoked | Washington |
| 507 Kennedy LLC | — | L00007011006 | 2021-05-20 | Revoked | |
| 507 Kennedy LLC | — | L00007011006 | 2021-05-20 | Revoked | Las Vegas |
| 507 Lamont St LLC | — | L00007882724 | 2024-01-17 | Active | |
| 507 Lamont St LLC | — | L00007882724 | 2024-01-17 | Active | Washington |
| 507.DAKA, LLC | — | L00007255208 | 2022-03-01 | Revoked | |
| 507.DAKA, LLC | — | L00007255208 | 2022-03-01 | Active | Washington |
| 5070 MILLWOOD LN NW LLC | — | L00008088302 | 2024-06-14 | Active | |
| 5070 MILLWOOD LN NW LLC | — | L00008088302 | 2024-06-14 | Active | Washington |
| 5072 Sherier LLC | — | L00006811423 | 2020-12-11 | Revoked | |
| 5072 Sherier LLC | — | L00006811423 | 2020-12-11 | Revoked | Ashburn |
| 5073 SHERIFF ROAD LLC | — | L00005512770 | 2016-09-22 | Revoked | |
| 5073 SHERIFF ROAD LLC | — | L00005512770 | 2016-09-22 | Revoked | ESSEX |
| 5074 Jay St. LLC | — | L00004674300 | 2013-12-04 | Revoked | |
| 5074 Jay St. LLC | — | L00004674300 | 2013-02-04 | Revoked | WASHINGTON |
| 5078 Just Street L.L.C. | — | L00005450126 | 2016-05-31 | Revoked | |
| 5078 Just Street L.L.C. | — | L00005450126 | 2016-05-31 | Revoked | suitland |
| 508 58th. St. Group LLC | — | L00007477864 | 2022-10-06 | Active | |
| 508 58th. St. Group LLC | — | L00007477864 | 2022-08-31 | Revoked | Bowie |
| 508 Brandywine St. SE L.L.C. | — | L00004972996 | 2014-06-08 | Revoked | Washington |
| 508 Brandywine St. SE L.L.C. | — | L00004972996 | 2014-06-08 | Revoked | |
| 508 FLORIDA AVENUE LLC | — | L13432 | 2002-12-18 | Revoked | |
| 508 FLORIDA AVENUE LLC | — | L13432 | 2002-12-18 | Revoked | |
| 508 IT LLC | — | L00005273682 | 2015-09-30 | Active | Washington |
| 508 IT LLC | — | L00005273682 | 2015-09-30 | Active | |
| 508 K ST Rebel Taco LLC | — | L00007141565 | 2021-10-18 | Revoked | Washington |
| 508 K ST Rebel Taco LLC | — | L00007141565 | 2021-10-18 | Active | |
| 508 K St Rebel Taco LLC | — | L00006431323 | 2019-11-13 | Revoked | |
| 508 K St Rebel Taco LLC | — | L00006431323 | 2019-05-01 | Revoked | Washington |
| 508 L STREET LLC | — | L37446 | 2008-02-14 | Revoked | |
| 508 L STREET LLC | — | L37446 | 2008-02-14 | Revoked | |
| 508 LIMITED PARTNERSHIP | — | P01643 | 1983-01-25 | Expired | |
| 508 Rhode Island Ave NW L.L.C. | — | L00007209827 | 2022-01-25 | Revoked | |
| 508 Rhode Island Ave NW L.L.C. | — | L00007209827 | 2022-01-25 | Revoked | Washington |
| 508 Tenth Street SE LLC | — | L00006018327 | 2018-06-21 | Revoked | |
| 508 Tenth Street SE LLC | — | L00006018327 | 2018-06-21 | Revoked | Washington |
| 5080 10th Street LLC | — | L00006428045 | 2019-11-07 | Revoked | |
| 5080 10th Street LLC | — | L00006428045 | 2019-11-07 | Revoked | Washington |
| 508Made, LLC | — | L00007505989 | 2022-11-15 | Active | |
| 508Made, LLC | — | L00007505989 | 2022-11-15 | Active | Washington |
| 509 11TH STREET SE LLC | — | L50622 | 2010-06-14 | Revoked | Washington |
| 509 11TH STREET SE LLC | — | L50622 | 2010-06-14 | Revoked | |
| 509 3rd St L.L.C. | — | L00007879002 | 2023-12-27 | Active | McKinney |
| 509 3rd St L.L.C. | — | L00007879002 | 2024-01-12 | Active | |
| 509 7TH STREET, N.E. L.P. | — | 007297 | 1997-09-17 | Expired | |
| 509 CAPITOL COURT N.E. ASSOCIATES, LIMITED PARTNERSHIP | — | P00938 | 1986-05-30 | Canceled | |
| 509 CAPITOL COURT N.E. ASSOCIATES, LIMITED PARTNERSHIP | — | P00938 | 1986-05-30 | Canceled | LEGACY NO DATA |
| 509 Kenyon L.L.C. | — | L00007788355 | 2023-08-31 | Revoked | |
| 509 Kenyon L.L.C. | — | L00007788355 | 2023-08-31 | Active | Fort Washington |
| 509 O ST LLC | — | L00005910461 | 2018-03-13 | Revoked | |
| 509 O ST LLC | — | L00005910461 | 2018-03-13 | Revoked | WASHINGTON |
| 509 Randolph St NW LLC | — | L00005806421 | 2017-10-27 | Revoked | |
| 509 Randolph St NW LLC | — | L00005806421 | 2017-10-27 | Active | Washington |
| 5093 SHERIFF RD LLC | — | L00005526078 | 2016-10-20 | Revoked | |
| 5093 SHERIFF RD LLC | — | L00005526078 | 2016-10-20 | Revoked | ESSEX |
| 509ab Decatur LLC | — | L00004799309 | 2013-08-20 | Revoked | |
| 509ab Decatur LLC | — | L00004799309 | 2013-08-20 | Revoked | Oxon Hill |
| 50CAN Action Fund Inc. | — | N00004760254 | 2012-03-02 | Active | |
| 50CAN Action Fund Inc. | — | N00004760254 | 2012-08-06 | Active | Washington |
| 50CAN Action Fund PAC | — | N00006025161 | 2018-07-02 | Revoked | |
| 50CAN Action Fund PAC | — | N00006025161 | 2018-07-02 | Revoked | Washington |
| 50CAN, INC | — | C00004572137 | 2010-07-09 | Active | |
| 50CAN, INC | — | C00004572137 | 2012-06-06 | Active | Washington |
| 50FLOOR, LLC | — | C00005544033 | 2016-11-29 | Revoked | TUCKER |
| 50FLOOR, LLC | — | C00005544033 | 2007-04-09 | Revoked | |
| 50FRAMES L.L.C. | — | L00004796776 | 2013-07-11 | Withdrawn | |
| 50FRAMES L.L.C. | — | L00004796776 | 2013-08-15 | Withdrawn | Washington |
| 50POINTONE LLC | — | L00004827125 | 2013-10-25 | Active | |
| 50POINTONE LLC | — | L00004827125 | 2013-10-25 | Active | WASHINGTON |
| 50TH A AND ASTOR PLACE CORPORATION | — | 804135 | 1980-10-06 | Revoked | |
| 50TH A AND ASTOR PLACE CORPORATION | — | 804135 | 1980-10-06 | Revoked | |
| 50TH AND FITCH, LLC | — | L48967 | 2010-03-26 | Revoked | WASHINGTON |
| 50TH AND FITCH, LLC | — | L48967 | 2010-03-26 | Revoked | |
| 50TH ST VENTURES LLC | — | L00006002297 | 2018-05-31 | Revoked | Lanham |
| 50TH ST VENTURES LLC | — | L00006002297 | 2018-05-31 | Revoked | |
| 50TH STREET N.E. LLC | — | L22957 | 2005-04-07 | Revoked | |
| 50TH STREET N.E. LLC | — | L22957 | 2005-04-07 | Revoked | |
| 50by40, Inc. | — | C00007392972 | 2020-02-01 | Revoked | |
| 50by40, Inc. | — | C00007392972 | 2022-06-13 | Revoked | Leawood |
| 50th Street Homes LLC | — | L00005824199 | 2017-11-28 | Revoked | |
| 50th Street Homes LLC | — | L00005824199 | 2017-11-28 | Revoked | Bowie |
| 50th Street LLC | — | L00006642629 | 2020-06-02 | Revoked | |
| 50th Street LLC | — | L00006642629 | 2020-06-02 | Dissolved | Washington |
| 50th street Mgmt LLC | — | US-DC-LL092604039 | 2026-09-15 | Active | Washington |
| 51 ADAMS LLC | — | L08707 | 2001-06-14 | Revoked | |
| 51 ADAMS LLC | — | L08707 | 2001-06-14 | Revoked | |
| 51 BRYANT ST NW, LLC | — | L30745 | 2006-11-08 | Revoked | |
| 51 BRYANT ST NW, LLC | — | L30745 | 2006-11-08 | Revoked | |
| 51 EQUITY ARDMORE LLC | — | L37614 | 2008-03-05 | Revoked | |
| 51 EQUITY ARDMORE LLC | — | L37614 | 2008-03-05 | Revoked | |
| 51 EQUITY ARDMORE MEZZCO LLC | — | L0000052149 | 2011-03-28 | Revoked | Dover |
| 51 EQUITY ARDMORE MEZZCO LLC | — | L0000052149 | 2011-03-08 | Revoked | |
| 51 EQUITY ARDMORE MEZZCO, LLC | — | 302176 | 2011-03-28 | Active | |
| 51 LINCOLN LLC | — | L37612 | 2008-03-05 | Revoked | |
| 51 LINCOLN LLC | — | L37612 | 2008-03-05 | Revoked | |
| 51 LINCOLN MEZZCO LLC | — | L0000052151 | 2011-03-08 | Revoked | |
| 51 LINCOLN MEZZCO LLC | — | L0000052151 | 2011-03-28 | Revoked | WASHINGTON |
| 51 LINCOLN MEZZCO, LLC | — | 302174 | 2011-03-28 | Active | |
| 51 LOUISIANA ASSOCIATES L.L.C. | — | L19533 | 2004-06-30 | Canceled | |
| 51 LOUISIANA ASSOCIATES L.L.C. | — | L19533 | 2004-06-30 | Canceled | |
| 51 LOUISIANA INVESTORS LLC | — | L37613 | 2008-03-05 | Revoked | |
| 51 LOUISIANA INVESTORS LLC | — | L37613 | 2008-03-05 | Revoked | |
| 51 LOUISIANA INVESTORS MEZZCO LLC | — | L0000052150 | 2011-03-08 | Revoked | |
| 51 LOUISIANA INVESTORS MEZZCO LLC | — | L0000052150 | 2011-03-28 | Revoked | WASHINGTON |
| 51 LOUISIANA INVESTORS MEZZCO, LLC | — | 302175 | 2011-03-28 | Active | |
| 51 N ASSOCIATES | — | P00185 | 1986-12-23 | Dissolved | LEGACY NO DATA |
| 51 N ASSOCIATES | — | P00185 | 1986-12-23 | Dissolved | |
| 51 N L.L.C. | — | L02358 | 1998-03-20 | Dissolved | |
| 51 N L.L.C. | — | L02358 | 1998-03-20 | Dissolved | |
| 51 N Residential, L.L.C. | — | L00005197030 | 2015-05-06 | Active | |
| 51 N Residential, L.L.C. | — | L00005197030 | 2015-05-08 | Active | Bethesda |
| 51 N STREET Inc. | — | 201021 | 2000-03-22 | Revoked | |
| 51 N STREET Inc. | — | 201021 | 2000-03-22 | Revoked | |
| 51 PARK CENTER LLC | — | L37611 | 2008-03-05 | Revoked | |
| 51 PARK CENTER LLC | — | L37611 | 2008-03-05 | Revoked | |
| 51 PARK CENTER MEZZCO LLC | — | L0000052152 | 2011-03-08 | Active | |
| 51 PARK CENTER MEZZCO LLC | — | L0000052152 | 2011-03-28 | Revoked | Washington |
| 51 PARK CENTER MEZZCO, LLC | — | 302172 | 2011-03-28 | Active | |
| 51 PERCENT | — | 283508 | 2008-12-16 | Revoked | |
| 51 PERCENT | — | 283508 | 2008-12-16 | Revoked | |
| 51 PG Homes LLC | — | L00005837929 | 2017-12-26 | Revoked | Bethesda |
| 51 PG Homes LLC | — | L00005837929 | 2017-12-26 | Revoked | |
| 51 QUINCY PLACE 2, L.L.C. | — | L00006030357 | 2018-07-09 | Revoked | |
| 51 QUINCY PLACE 2, L.L.C. | — | L00006030357 | 2018-07-09 | Revoked | WASHINGTON |
| 51 Quincy LLC | — | L00005453371 | 2016-06-07 | Revoked | |
| 51 Quincy LLC | — | L00005453371 | 2016-06-07 | Revoked | Rockville |
| 51 R Street NE LLC | — | L00005583816 | 2017-02-09 | Revoked | |
| 51 R Street NE LLC | — | L00005583816 | 2017-02-09 | Revoked | Washington |
| 51 RANDOLPH PLACE LLC | — | L14908 | 2003-05-14 | Dissolved | Washington |
| 51 RANDOLPH PLACE LLC | — | L14908 | 2003-05-14 | Dissolved | |
| 51 Steps To Freedom | — | N00007113949 | 2021-09-17 | Active | |
| 51 Steps To Freedom | — | N00007113949 | 2021-09-17 | Active | Washington |
| 51 Strategies L.L.C. | — | L00004861608 | 2014-01-22 | Revoked | |
| 51 Strategies L.L.C. | — | L00004861608 | 2014-01-22 | Revoked | Washington |
| 51 T ST LLC | — | L00004616789 | 2012-08-30 | Revoked | |
| 51 T ST LLC | — | L00004616789 | 2012-08-30 | Revoked | Great Falls |
| 51 T STREET NE LLC | — | L00005660901 | 2017-03-31 | Revoked | |
| 51 T STREET NE LLC | — | L00005660901 | 2017-03-31 | Revoked | Rockville |
| 51 T Street Condominiums Association | — | N00007346312 | 2022-04-14 | Active | Washington |
| 51 T Street Condominiums Association | — | N00007346312 | 2022-04-19 | Active | |
| 51 T Street Condominiums LLC | — | L00007069927 | 2021-07-27 | Revoked | Rockville |
| 51 T Street Condominiums LLC | — | L00007069927 | 2021-07-27 | Revoked | |
| 51-11TH STREET LIMITED PARTNERSHIP | — | P05906 | 1979-09-14 | Revoked | |
| 51-11TH STREET LIMITED PARTNERSHIP | — | P05906 | 1979-09-14 | Revoked | LEGACY NO DATA |
| 510 - 8TH STREET ASSOCIATES | — | P00379 | 1985-02-05 | Merged | |
| 510 - 8TH STREET ASSOCIATES | — | P00379 | 1985-02-05 | Merged | LEGACY NO DATA |
| 510 EIGHTH STREET ASSOCIATES LLC | — | L46325 | 2009-10-02 | Active | |
| 510 EIGHTH STREET ASSOCIATES LLC | — | L46325 | 2009-10-02 | Active | Washington |
| 510 First St LLC | — | L00006295632 | 2019-05-09 | Revoked | Washington |
| 510 First St LLC | — | L00006295632 | 2019-05-09 | Revoked | |
| 510 H LLC | — | L27123 | 2006-02-14 | Active | |