| 40 ACRES REALTY & DEVELOPMENT ENTERPRISES LLC | — | L20636 | 2004-10-01 | Revoked | |
| 40 ADAMS STREET, LLC (THE) | — | L50138 | 2010-05-11 | Revoked | |
| 40 ADAMS STREET, LLC (THE) | — | L50138 | 2010-05-11 | Revoked | |
| 40 AND OVER CLUBS OF AMERICA, THE | — | 024636 | 1937-09-29 | Revoked | |
| 40 AND OVER CLUBS OF AMERICA, THE | — | 024636 | 1937-09-29 | Revoked | |
| 40 Acres Partners LLC | — | C00006801232 | 2017-01-12 | Revoked | |
| 40 Acres Partners LLC | — | C00006801232 | 2020-11-24 | Revoked | Washington |
| 40 CHESAPEAKE SE DC LLC | — | L00005896748 | 2018-03-06 | Active | |
| 40 CHESAPEAKE SE DC LLC | — | L00005896748 | 2018-03-06 | Active | Washington |
| 40 CHESAPEAKE ST., S.E. INC. | — | 921092 | 1992-03-27 | Revoked | |
| 40 CHESAPEAKE ST., S.E. INC. | — | 921092 | 1992-03-27 | Revoked | |
| 40 CHESAPEAKE STREET S.E. TENANTS ASSOCIATION INC. | — | 297272 | 2010-03-25 | Revoked | |
| 40 CHESAPEAKE STREET S.E. TENANTS ASSOCIATION INC. | — | 297272 | 2010-03-25 | Revoked | |
| 40 CHESAPEAKE STREET, SE LLC | — | L48748 | 2010-03-24 | Revoked | |
| 40 CHESAPEAKE STREET, SE LLC | — | L48748 | 2010-03-24 | Revoked | |
| 40 Days for Life | — | N00006406228 | 2007-05-25 | Active | |
| 40 Days for Life | — | N00006406228 | 2019-10-08 | Active | Bryan |
| 40 Green Acres LLC | — | L00007469767 | 2022-09-25 | Active | |
| 40 LAYERS AND A MUSE LLC | — | L00007531025 | 2022-12-28 | Active | |
| 40 LAYERS AND A MUSE LLC | — | L00007531025 | 2022-12-28 | Active | Washington |
| 40 LONGFELLOW LLC | — | L28434 | 2006-05-12 | Revoked | |
| 40 LONGFELLOW LLC | — | L28434 | 2006-05-12 | Revoked | |
| 40 PATTERSON LLC | — | L21332 | 2004-12-02 | Active | |
| 40 PATTERSON LLC | — | L21332 | 2004-12-02 | Active | MCLEAN |
| 40 Porter NE Fund LLC | — | L00007208682 | 2022-01-24 | Active | |
| 40 Porter NE Fund LLC | — | L00007208682 | 2022-01-24 | Revoked | Washington |
| 40 U St NW LLC | — | L00005813058 | 2017-11-08 | Revoked | Crownsville |
| 40 U St NW LLC | — | L00005813058 | 2017-11-08 | Revoked | |
| 40 W ST LLC | — | L00005180892 | 2015-04-21 | Revoked | |
| 40 W ST LLC | — | L00005180892 | 2015-04-21 | Revoked | Kensington |
| 400 6TH STREET ASSOCIATES LLC | — | L03628 | 1999-03-24 | Canceled | |
| 400 6TH STREET ASSOCIATES LLC | — | L03628 | 1999-03-24 | Canceled | |
| 400 C STREET ASSOCIATES | — | P03352 | 1980-07-31 | Expired | |
| 400 C STREET INCORPORATED | — | 801243 | 1980-03-19 | Revoked | |
| 400 C STREET INCORPORATED | — | 801243 | 1980-03-19 | Revoked | |
| 400 C STREET LLC | — | L13507 | 2002-12-26 | Active | |
| 400 C STREET LLC | — | L13507 | 2002-12-26 | Active | BETHESDA |
| 400 CHESAPEAKE ST SE LLC | — | L00006782176 | 2020-10-28 | Revoked | |
| 400 CHESAPEAKE ST SE LLC | — | L00006782176 | 2020-10-28 | Revoked | WASHINGTON |
| 400 CHESAPEAKE STREET LLC | — | L11260 | 2002-04-26 | Revoked | none |
| 400 CHESAPEAKE STREET LLC | — | L11260 | 2002-04-26 | Revoked | |
| 400 CHESAPEAKE STREET, SE INC. | — | 231583 | 2003-05-06 | Revoked | |
| 400 CHESAPEAKE STREET, SE INC. | — | 231583 | 2003-05-06 | Revoked | |
| 400 CHESAPEAKE TENANT ORGANIZATION | — | 221396 | 2002-05-06 | Revoked | |
| 400 CHESAPEAKE TENANT ORGANIZATION | — | 221396 | 2002-05-06 | Revoked | |
| 400 Chesapeake Street LLC | — | L00006497472 | 2020-02-05 | Dissolved | |
| 400 Chesapeake Street LLC | — | L00006497472 | 2020-02-05 | Dissolved | WASHINGTON |
| 400 DELAFIELD LLC | — | L07852 | 2001-02-28 | Revoked | |
| 400 DELAFIELD LLC | — | L07852 | 2001-02-28 | Revoked | |
| 400 DOUGLAS LLC | — | L20861 | 2004-10-22 | Revoked | |
| 400 DOUGLAS LLC | — | L20861 | 2004-10-22 | Revoked | |
| 400 Delafield Place LLC | — | L00006003219 | 2018-06-01 | Revoked | |
| 400 Delafield Place LLC | — | L00006003219 | 2018-05-22 | Revoked | Washington |
| 400 E Street SW L.L.C. | — | L00004185761 | 2012-02-17 | Active | Washington |
| 400 E Street SW L.L.C. | — | L00004185761 | 2012-02-17 | Active | |
| 400 EVARTS PARTNERS LLC | — | L28618 | 2006-05-26 | Revoked | |
| 400 EVARTS PARTNERS LLC | — | L28618 | 2006-05-26 | Revoked | WASHINGTON |
| 400 Evarts Street Partners LLC | — | L00006274420 | 2019-04-11 | Revoked | |
| 400 Evarts Street Partners LLC | — | L00006274420 | 2019-04-11 | Revoked | Washington |
| 400 FIRST STREET ASSOCIATES LIMITED PARTNERSHIP | — | 018693 | 1993-12-15 | Withdrawn | LEGACY NO DATA |
| 400 FIRST STREET ASSOCIATES LIMITED PARTNERSHIP | — | 018693 | 1993-12-15 | Withdrawn | |
| 400 FLORIDA AVE LLC | — | L0000051474 | 2011-02-23 | Active | Falls Church |
| 400 FLORIDA AVE LLC | — | L0000051474 | 2011-02-23 | Active | |
| 400 FLORIDA AVE LLC | — | 302060 | — | | |
| 400 FLORIDA NE INC | — | C00008568258 | 2025-11-13 | Active | |
| 400 FLORIDA NE INC | — | C00008568258 | 2025-11-13 | Active | WASHINGTON |
| 400 K STREET, LLC | — | L00005290389 | 2015-10-26 | Active | |
| 400 K STREET, LLC | — | L00005290389 | 2015-11-04 | Active | WASHINGTON |
| 400 KENNEDY LLC | — | L22225 | 2005-02-14 | Revoked | |
| 400 KENNEDY LLC | — | L22225 | 2005-02-14 | Revoked | |
| 400 KENNEDY STREET INC. | — | 590597 | 1959-02-17 | Dissolved | |
| 400 KENNEDY STREET INC. | — | 590597 | 1959-02-17 | Dissolved | |
| 400 M LP, LLC | — | L00008415202 | 2025-05-05 | Active | Washington |
| 400 M LP, LLC | — | L00008415202 | 2025-05-05 | Active | |
| 400 M STREET L.L.C. | — | L00942 | 1996-07-12 | Revoked | |
| 400 M STREET L.L.C. | — | L00942 | 1996-07-12 | Revoked | |
| 400 MASSACHUSETTS AVENUE LLC | — | L12976 | 2002-10-28 | Canceled | |
| 400 MASSACHUSETTS AVENUE LLC | — | L12976 | 2002-10-28 | Canceled | |
| 400 MASSACHUSETTS UNIT 1206 NW LLC | — | L00007501278 | 2022-09-21 | Active | Washington DC |
| 400 MASSACHUSETTS UNIT 1206 NW LLC | — | L00007501278 | 2022-12-09 | Active | |
| 400 MASSACHUSETTS, A MASTER CONDOMINIUM UNIT OWNERS' ASSOCIATION | — | 250011 | 2005-01-03 | Active | Washington |
| 400 MASSACHUSETTS, A MASTER CONDOMINIUM UNIT OWNERS' ASSOCIATION | — | 250011 | 2005-01-03 | Active | |
| 400 MORSE F&B, LLC | — | C00008394949 | 2025-01-16 | Active | |
| 400 MORSE F&B, LLC | — | C00008394949 | 2025-04-07 | Revoked | WASHINGTON |
| 400 Mass #316 LLC | — | L00004740733 | 2013-04-24 | Revoked | |
| 400 Mass #316 LLC | — | L00004740733 | 2013-04-24 | Revoked | E. Amherst |
| 400 NEWCOMB STREET PARTNERSHIP | — | P01871 | 1983-10-17 | Revoked | |
| 400 NEWCOMB STREET PARTNERSHIP | — | P01871 | 1983-10-17 | Revoked | LEGACY NO DATA |
| 400 NORTH CAPITOL CORP. | — | 712651 | 1971-11-18 | Dissolved | |
| 400 NORTH CAPITOL CORP. | — | 712651 | 1971-11-18 | Dissolved | |
| 400 Oklahoma Ave LLC | — | L00006313917 | 2019-06-07 | Revoked | |
| 400 Oklahoma Ave LLC | — | L00006313917 | 2019-06-07 | Revoked | Washington |
| 400 RHODE ISLAND LLC | — | L53274 | 2010-12-03 | Active | |
| 400 RHODE ISLAND LLC | — | L53274 | 2010-12-03 | Active | Falls Church |
| 400 SEVENTH STREET COMPANY LLC | — | L00004650236 | 2012-11-28 | Revoked | WELLESLEY HILLS |
| 400 SEVENTH STREET COMPANY LLC | — | L00004650236 | 2012-03-30 | Revoked | |
| 400 Seward Square L.L.C. | — | L00005783866 | 2017-09-20 | Active | Washington |
| 400 Seward Square L.L.C. | — | L00005783866 | 2017-09-20 | Active | |
| 400 TWELFTH STREET L.L.C. | — | L01365 | 1997-03-05 | Dissolved | |
| 400 TWELFTH STREET L.L.C. | — | L01365 | 1997-03-05 | Dissolved | |
| 400 VIRGINIA AVENUE LLC | — | L10359 | 2002-01-18 | Active | |
| 400 VIRGINIA AVENUE LLC | — | L10359 | 2002-01-18 | Active | Atlanta |
| 400 VIRGINIA AVENUE, S.W. CORPORATION | — | 862042 | 1986-05-23 | Dissolved | |
| 400 VIRGINIA AVENUE, S.W. CORPORATION | — | 862042 | 1986-05-23 | Dissolved | |
| 4000 13TH NW INVESTMENT LLC | — | L00005131007 | 2015-03-17 | Revoked | |
| 4000 13TH NW INVESTMENT LLC | — | L00005131007 | 2015-03-17 | Revoked | Washington |
| 4000 13TH ST NW L.L.C. | — | L00007035179 | 2021-06-25 | Active | Bethesda |
| 4000 13TH ST NW L.L.C. | — | L00007035179 | 2021-06-25 | Active | |
| 4000 13TH ST. NW DEVELOPMENT LLC | — | L00006329902 | 2019-07-02 | Revoked | |
| 4000 13TH ST. NW DEVELOPMENT LLC | — | L00006329902 | 2019-07-02 | Revoked | LAKE SUCCESS |
| 4000 13th ST. Tenants Association, INC. | — | N00007034934 | 2021-06-25 | Revoked | Washington |
| 4000 13th ST. Tenants Association, INC. | — | N00007034934 | 2021-06-25 | Revoked | |
| 4000 13th Street Limited Liability Company | — | L00005026114 | 2014-07-29 | Revoked | |
| 4000 13th Street Limited Liability Company | — | L00005026114 | 2014-07-29 | Revoked | Washington |
| 4000 18th St LLC | — | US-DC-LL032600005 | 2026-03-02 | Active | Washington |
| 4000 21ST ST NE LLC | — | L0000055759 | 2011-09-27 | Revoked | |
| 4000 21ST ST NE LLC | — | L0000055759 | 2011-09-27 | Revoked | WASHINGTON |
| 4000 4th Street Tenant Association, Inc. | — | N00007024381 | 2021-06-10 | Revoked | |
| 4000 4th Street Tenant Association, Inc. | — | N00007024381 | 2021-06-09 | Revoked | Washington |
| 4000 52ND STREET INC. | — | 950548 | 1995-02-15 | Revoked | |
| 4000 52ND STREET INC. | — | 950548 | 1995-02-15 | Revoked | |
| 4000 7th st LLC | — | L00006155489 | 2019-01-22 | Revoked | washington |
| 4000 7th st LLC | — | L00006155489 | 2019-01-22 | Revoked | |
| 4000 BRANDYWINE LIMITED PARTNERSHIP | — | P04237 | 1963-01-30 | Revoked | |
| 4000 BRANDYWINE LIMITED PARTNERSHIP | — | P04237 | 1963-01-30 | Revoked | LEGACY NO DATA |
| 4000 Benning Road L.L.C. | — | L00004864412 | 2014-01-28 | Active | |
| 4000 Benning Road L.L.C. | — | L00004864412 | 2014-01-28 | Active | Kingston |
| 4000 Brandywine Street NW Ground Owner LLC | — | L00006598436 | 2020-04-07 | Active | |
| 4000 Brandywine Street NW Ground Owner LLC | — | L00006598436 | 2020-04-13 | Active | NEW YORK |
| 4000 CT LENDCO LLC | — | US-DC-FN032602011 | 2026-03-27 | Active | New York |
| 4000 KANSAS AVE NW OF 2006 TENANTS ASSOCIATION | — | 262449 | 2006-08-17 | Revoked | |
| 4000 KANSAS AVE NW OF 2006 TENANTS ASSOCIATION | — | 262449 | 2006-08-17 | Revoked | |
| 4000 L.L.C. | — | L00770 | 1996-03-27 | Revoked | |
| 4000 L.L.C. | — | L00770 | 1996-03-27 | Revoked | |
| 4000 MASS TENANTS ASSOCIATION 2 | — | US-DC-NP082602886 | 2026-08-21 | Active | Washington |
| 4000 MASS., AVE INC. | — | 551280 | 1955-03-23 | Revoked | |
| 4000 MASS., AVE INC. | — | 551280 | 1955-03-23 | Revoked | |
| 4000 MASSACHUSETTS AVENUE PARTNERS LLC | — | L02124 | 1998-01-13 | Active | |
| 4000 MASSACHUSETTS AVENUE PARTNERS LLC | — | L02124 | 1998-01-13 | Active | Washington |
| 4000 MASSACHUSETTS AVENUE TENANTS' Association | — | 263513 | 2006-11-27 | Active | |
| 4000 MASSACHUSETTS AVENUE TENANTS' Association | — | 263513 | 2006-11-27 | Active | Washington |
| 4000 Marlboro Residence LLC | — | L00007949686 | 2024-03-06 | Active | |
| 4000 Marlboro Residence LLC | — | L00007949686 | 2024-03-06 | Revoked | Washington |
| 4000 TUNLAW ROAD TENANTS ASSOCIATION | — | 701290 | 1970-06-01 | Revoked | |
| 4000 TUNLAW ROAD TENANTS ASSOCIATION | — | 701290 | 1970-06-01 | Revoked | |
| 4000 TUNLAW UNIT OWNERS' ASSOCIATION Inc. | — | 811167 | 1981-03-17 | Active | |
| 4000 TUNLAW UNIT OWNERS' ASSOCIATION Inc. | — | 811167 | 1981-03-17 | Active | Washington |
| 4000 WISCONSIN AVENUE HOLDING LIMITED PARTNERSHIP | — | 005289 | 1989-02-16 | Dissolved | WASHINGTON |
| 4000 WISCONSIN AVENUE HOLDING LIMITED PARTNERSHIP | — | 005289 | 1989-02-16 | Active | |
| 4000 WISCONSIN SPORT AND HEALTH LIMITED PARTNERSHIP | — | P00254 | 1987-09-03 | Revoked | |
| 4000 WISCONSIN SPORT AND HEALTH LIMITED PARTNERSHIP | — | P00254 | 1987-09-03 | Revoked | MCLEAN |
| 4000 Wisconsin Avenue NW Holdings, LLC | — | L00006193080 | 2019-02-25 | Withdrawn | |
| 4000 Wisconsin Avenue NW Holdings, LLC | — | L00006193080 | 2019-03-04 | Withdrawn | BETHESDA |
| 4000 Wisconsin Investors LLC | — | L00006223650 | 2019-03-18 | Revoked | |
| 4000 Wisconsin Investors LLC | — | L00006223650 | 2019-03-18 | Revoked | Washington |
| 4000-4013 Spring Valley Tenant Organization | — | N00004682848 | 2013-02-23 | Dissolved | |
| 4000-4013 Spring Valley Tenant Organization | — | N00004682848 | 2013-02-23 | Dissolved | Washington |
| 4001 1st St SE II Tenants' Association | — | US-DC-NP042600613 | 2026-04-09 | Active | Washington |
| 4001 1st St. SE Tenants Association | — | N00006269949 | 2019-04-05 | Revoked | |
| 4001 1st St. SE Tenants Association | — | N00006269949 | 2019-04-05 | Revoked | Washington |
| 4001 4TH SE DC LLC | — | L00005754883 | 2017-08-02 | Active | |
| 4001 4TH SE DC LLC | — | L00005754883 | 2017-08-02 | Active | Washington |
| 4001 4TH STREET, SE LLC | — | L39274 | 2008-06-20 | Revoked | |
| 4001 4TH STREET, SE LLC | — | L39274 | 2008-06-20 | Revoked | |
| 4001 7th Street NE LLC | — | L00007168763 | 2021-11-24 | Active | |
| 4001 7th Street NE LLC | — | L00007168763 | 2021-11-24 | Active | Washington |
| 4001 7th Street NE Tenants | — | N00007028027 | 2021-06-15 | Revoked | Washington |
| 4001 7th Street NE Tenants | — | N00007028027 | 2021-06-15 | Revoked | |
| 4001 CORPORATION (THE) | — | 942134 | 1994-07-01 | Dissolved | |
| 4001 CORPORATION (THE) | — | 942134 | 1994-07-01 | Dissolved | |
| 4001 DAVIS PLACE TENANT ORGANIZATION | — | 860676 | 1986-02-24 | Revoked | |
| 4001 DAVIS PLACE TENANT ORGANIZATION | — | 860676 | 1986-02-24 | Revoked | |
| 4001 FIRST ST SE LLC | — | L00006223226 | 2019-03-18 | Revoked | WASHINGTON |
| 4001 FIRST ST SE LLC | — | L00006223226 | 2019-03-28 | Active | |
| 4001 SOUTH CAPITOL STREET LLC | — | L05444 | 2000-03-02 | Revoked | |
| 4001 SOUTH CAPITOL STREET LLC | — | L05444 | 2000-03-02 | Revoked | |
| 4004 13TH STREET LLC | — | L00004647821 | 2012-11-20 | Revoked | |
| 4004 13TH STREET LLC | — | L00004647821 | 2012-11-20 | Revoked | Washington |
| 4004 13th KNS LLC | — | L00004651928 | 2012-12-04 | Revoked | Rockville |
| 4004 13th KNS LLC | — | L00004651928 | 2012-12-04 | Revoked | |
| 4004 22nd st LLC | — | L00006250308 | 2019-03-28 | Revoked | |
| 4004 22nd st LLC | — | L00006250308 | 2019-03-28 | Revoked | Alexandria |
| 4004 EDMUNDS STREET LLC | — | L19935 | 2004-08-03 | Revoked | |
| 4004 EDMUNDS STREET LLC | — | L19935 | 2004-08-03 | Revoked | |
| 4004 MINNESOTA LIMITED LIABILITY | — | L00205 | 1995-03-17 | Active | washington |
| 4004 MINNESOTA LIMITED LIABILITY | — | L00205 | 1995-03-17 | Active | |
| 4005 4th ST SE LLC | — | L00007204292 | 2022-01-18 | Revoked | WASHINGTON |
| 4005 4th ST SE LLC | — | L00007204292 | 2022-01-18 | Revoked | |
| 4005 7TH STREET NE, LLC | — | L00004978877 | 2014-06-18 | Revoked | WASHINGTON |
| 4005 7TH STREET NE, LLC | — | L00004978877 | 2014-06-18 | Revoked | |
| 4005 EIGHTH STREET COOPERATIVE (THE) | — | 850610 | 1985-02-21 | Revoked | |
| 4005 EIGHTH STREET COOPERATIVE (THE) | — | 850610 | 1985-02-21 | Revoked | |
| 4005 properties Inc. | — | L00007680399 | 2023-04-13 | Active | Washington |
| 4005 properties Inc. | — | L00007680399 | 2023-04-13 | Active | |
| 4006 KANSAS LLC | — | L00006307008 | 2019-05-28 | Revoked | |
| 4006 KANSAS LLC | — | L00006307008 | 2019-05-28 | Revoked | Vienna |
| 4006 SOUTH CAPITAL STREET LLC | — | L51078 | 2010-07-12 | Revoked | |
| 4006 SOUTH CAPITAL STREET LLC | — | L51078 | 2010-07-12 | Revoked | VIENNA |
| 4007 CONNECTICUT AVENUE TENANTS ASSOCIATION, INC. (THE) | — | 201095 | 2000-03-28 | Revoked | |
| 4007 CONNECTICUT AVENUE TENANTS ASSOCIATION, INC. (THE) | — | 201095 | 2000-03-28 | Revoked | |