| 1ST AMERICA INFUSION SERVICES, LLC | Z20259594 | 2020-02-03 | Active | Valdosta |
| 1ST AMERICA MOTORS LLC | W10304731 | 2004-11-15 | Suspended | BOWIE |
| 1ST AMERICA TRANSPORATION L.L.C | W10581122 | 2005-04-18 | Suspended | GLENDALE |
| 1ST AMERICAN BUILDERS, LLC | W10437127 | 2005-01-28 | Suspended | ANNAPOLIS |
| 1ST AMERICAN CAPITAL DEVELOPMENT GROUP, INC | D10407237 | 2004-12-30 | Suspended | BALTIMORE |
| 1ST AMERICAN ESTATE PLANNING, LLC | Z17669870 | 2016-11-28 | Active | CLEARWATER |
| 1ST AMERICAN EXPORT-IMPORT INC. | D06078000 | 2000-12-11 | Suspended | BALTIMORE |
| 1ST AMERICAN FEDERAL MORTGAGE, INC. | D03874674 | 1994-04-28 | Suspended | TOWSON |
| 1ST AMERICAN FINANCE & CAPITAL CORPORATION | D03446747 | 1992-06-08 | Suspended | GREENBELT |
| 1ST AMERICAN FINANCIAL CORPORATION | D06211650 | 2001-03-09 | Suspended | BELTSVILLE |
| 1ST AMERICAN GLASS COMPANY, INC. | D03550621 | 1992-12-09 | Suspended | BALTIMORE |
| 1ST AMERICAN HOME FINANCE, LLC | W11821097 | 2007-03-23 | Dissolved | WESTMINSTER |
| 1ST AMERICAN HOME INSPECTIONS LLC | W16642050 | 2015-06-01 | Active | SEVERN |
| 1ST AMERICAN HOME MORTGAGE CORPORATION | D07452881 | 2003-07-01 | Suspended | BEL AIR |
| 1ST AMERICAN HOMES, INC. | D02461135 | 1987-12-07 | Suspended | BETHESDA |
| 1ST AMERICAN MANAGEMENT LLC | W15032980 | 2013-01-16 | Dissolved | POTOMAC |
| 1ST AMERICAN MANAGEMENT, INC | D07663396 | 2003-11-17 | Suspended | ANNAPOLIS |
| 1ST AMERICAN MANAGEMENT, LLC | W11656899 | 2006-12-18 | Suspended | ANNAPOLIS |
| 1ST AMERICAN MICHRIST, LLC | W22336002 | 2021-11-03 | Active | CHEVY CHASE |
| 1ST AMERICAN MORTGAGE & TRUST CORPORATION | D01217645 | 1980-12-16 | Suspended | BALTIMORE |
| 1ST AMERICAN MORTGAGE FINANCIAL, LLC | Z10725570 | 2005-06-28 | Suspended | FAIRFAX |
| 1ST AMERICAN MORTGAGE, LLC | W11083037 | 2006-01-27 | Suspended | CLINTON |
| 1ST AMERICAN PENSION SERVICES, INC | F12028049 | 2007-07-13 | Suspended | ARLINGTON |
| 1ST AMERICAN PROPERTIES, LLC | W05152517 | 1998-12-07 | Suspended | LUTERVILLE |
| 1ST AMERICAN REALTY, INC. | D06132435 | 2001-01-22 | Suspended | BALTIMORE |
| 1ST AMERICAN SEDAN & LIMO, INC. | D06463772 | 2001-09-18 | Suspended | OXON HILL |
| 1ST AMERICAN SERVICE GROUPS, INC. | D06402259 | 2001-07-23 | Suspended | RIVERDALE |
| 1ST AMERICAN TRANSPORT COMPANY | D06578132 | 2001-12-14 | Suspended | OWINGS MILLS |
| 1ST AMERICAN TRUST FINANCIAL SERVICES CORPORATION | D11016698 | 2005-12-15 | Suspended | GLENWOOD |
| 1ST AMERICAN TRUST MORTGAGE CORPORATION | D16599003 | 2015-06-17 | Dissolved | GLENWOOD |
| 1ST AMERICAN TRUST MORTGAGE CORPORATION | D05080106 | 1998-09-01 | Dissolved | COLUMBIA |
| 1ST AMERICARE L.L.C | W23706732 | 2023-02-14 | Active | COLUMBIA |
| 1ST ANALYTICS, INC | D12695169 | 2008-08-29 | Dissolved | BALTIMORE |
| 1ST AND 10 CLEANING SERVICE LLC | W25841628 | 2025-02-24 | Active | Baltimore |
| 1ST ANGELS CARING HANDS LLC | W17907916 | 2017-03-31 | Suspended | BOWIE |
| 1ST ANNAPOLIS TAG & TITLE LLC | W20166880 | 2019-12-25 | Active | ANNAPOLIS |
| 1ST APPLETREE MORTGAGE LLC | Z10127678 | 2004-05-12 | Suspended | WAYNESBORO |
| 1ST APPRAISER HEAVY EQUIPMENT SERVICE, LLC | W19193556 | 2018-10-26 | Suspended | REISTERSTOWN |
| 1ST APRIL ENTERPRISES, LLC | W22140354 | 2021-09-03 | Suspended | BOWIE MD, BOWIE |
| 1ST APRIL MANAGEMENT SERVICES, LLC | W18472845 | 2017-12-28 | Suspended | BOWIE |
| 1ST ARRIVING, LLC | Z18014795 | 2017-05-18 | Suspended | MECHANICSVILLE |
| 1ST ASSOCIATES REAL ESTATE GROUP LLC | W16644767 | 2015-07-15 | Active | — |
| 1ST ASSURED FINANCE AND INVESTING LLC | W22041040 | 2021-08-02 | Suspended | WINDSOR MILL |
| 1ST ATLANTIC MORTGAGE CORPORATION | D05431242 | 1999-08-05 | Suspended | STEVENSVILLE |
| 1ST ATLANTIC MORTGAGE SERVICES, LLC | W10513026 | 2005-03-11 | Suspended | BALTIMORE |
| 1ST ATLANTIC MORTGAGE, LLC | W10198323 | 2004-09-01 | Suspended | — |
| 1ST ATLANTIC REALTY INC. | D03391497 | 1992-03-13 | Suspended | FALLSTON |
| 1ST ATLANTIC SERVICE COMPANY, L.L.C | W05608013 | 1999-12-30 | Suspended | — |
| 1ST ATLANTIC, L.L.C. | W05504626 | 1999-10-05 | Suspended | BETHESDA |
| 1ST ATLAS MORTGAGE & INVESTMENT CORP | F10757441 | 2005-05-19 | Suspended | VIRGINIA BEACH |