| OS PARKING, LLCTampa, FL · Active | Tampa, FL | LLC | Oct 6, 2025 | Active |
| ARQ METHOD, LLCTampa, FL · Active | Tampa, FL | LLC | Sep 19, 2025 | Active |
| OS OFFICE, LLCTampa, FL · Active | Tampa, FL | LLC | Jul 30, 2025 | Active |
| OS WFH, LLCTampa, FL · Active | Tampa, FL | LLC | Jul 30, 2025 | Active |
| O STATION 4, LLCTampa, FL · Active | Tampa, FL | LLC | Apr 1, 2025 | Active |
| W&E FITNESS, LLCTampa, FL · Inactive | Tampa, FL | LLC | Apr 23, 2024 | Inactive |
| OS RETAIL, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 22, 2024 | Active |
| CENTRAL CITY OZB, LLCTampa, FL · Active | Tampa, FL | LLC | Jun 1, 2023 | Active |
| EWI PARTNERS, LLCTampa, FL · Active | Tampa, FL | LLC | May 20, 2022 | Active |
| EDGE CENTRAL DEVELOPMENT PARTNERS, LLCTampa, FL · Active | Tampa, FL | LLC | Nov 27, 2019 | Active |
| TAMPA HILLSBOROUGH ECONOMIC DEVELOPMENT CORPORATIONTampa, FL · Active | Tampa, FL | Nonprofit | Sep 17, 2009 | Active |
| EWI CONSTRUCTION, LLCTampa, FL · Active | Tampa, FL | LLC | Jun 28, 2007 | Active |
| ELLISON DEVELOPMENT, LLCTampa, FL · Inactive | Tampa, FL | LLC | May 9, 2012 | Inactive |
| LIFSON, LLCTampa, FL · Inactive | Tampa, FL | LLC | Jul 20, 2012 | Inactive |
| EB HOLDINGS I, LLCTampa, FL · Inactive | Tampa, FL | LLC | Feb 11, 2013 | Inactive |
| O STATION 4, LLCTampa, FL · Inactive | Tampa, FL | LLC | May 6, 2022 | Inactive |
| OS PARKING, LLCTampa, FL · Inactive | Tampa, FL | LLC | Jan 22, 2024 | Inactive |
| OS WFH, LLCTampa, FL · Inactive | Tampa, FL | LLC | Jan 19, 2024 | Inactive |
| OS OFFICE, LLCTampa, FL · Inactive | Tampa, FL | LLC | Jan 22, 2024 | Inactive |
| ELLISON DEVELOPMENT PARTNERS ARQ, LLCTampa, FL · Active | Tampa, FL | LLC | Apr 10, 2026 | Active |
| OS OFFICE SUB, LLCTampa, FL · Active | Tampa, FL | LLC | Nov 21, 2025 | Active |
| OS HOTEL, LLCTampa, FL · Active | Tampa, FL | LLC | Nov 21, 2025 | Active |
| OS WFH MANAGER, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 20, 2026 | Active |
| OS OFFICE MANAGER, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 20, 2026 | Active |
| O STATION MANAGER, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 20, 2026 | Active |
| OS PARKING MANAGER, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 21, 2026 | Active |
| OS RETAIL MANAGER, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 21, 2026 | Active |
| OS PARKING SUB, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 23, 2026 | Active |
| OS RETAIL SUB, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 23, 2026 | Active |
| OS WFH SUB, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 23, 2026 | Active |
| OS OFFICE RETAIL UNIT SUB, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 30, 2026 | Active |
| OS WFH RETAIL UNIT SUB, LLCTampa, FL · Active | Tampa, FL | LLC | Jan 30, 2026 | Active |
| THE CENTRAL ST. PETERSBURG - OFFICE - COMMERCIAL CONDOMINIUM ASSOCIATION, INC.Tampa, FL · Active | Tampa, FL | Nonprofit | Mar 10, 2026 | Active |
| THE CENTRAL ST. PETERSBURG COMMERCIAL CONDOMINIUM ASSOCIATION, ITampa, FL · Active | Tampa, FL | Nonprofit | Mar 10, 2026 | Active |
| THE CENTRAL ST. PETERSBURG - WORKFORCE HOUSING - COMMERCIAL CONDOMINIUM ASSOCIATION, INC.Tampa, FL · Active | Tampa, FL | Nonprofit | Mar 10, 2026 | Active |
| FORTIFIED INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Jan 24, 2002 | Inactive |
| ELLISON DEVELOPMENT GROUP, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Feb 28, 2007 | Inactive |
| SYAR LIVED, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Aug 7, 1997 | Inactive |