| Houston Chronicle Publishing Company TX | Information & Media | 0 | — | A |
| HOUSTON COPART SALVAGE AUTO AUCTIONS, LP TX | Wholesale Trade | 0 | — | C |
| Houston County Community Hospital TN | Healthcare & Social Assistance | 0 | — | F |
| Houston County Electric Cooperative TX | Utilities | 0 | — | A |
| Houston County Healthcare Authority AL | Healthcare & Social Assistance | 5 | $438,480 | — |
| Houston Distributing Co Inc TX | Wholesale Trade | 0 | — | D |
| Houston Dynamic Service TX | Other Services | 0 | — | D |
| HOUSTON ELBOW TX | Manufacturing | 0 | — | A |
| Houston Electric Inc. OK | Construction | 1 | $79,000 | — |
| Houston Fastener Manufacturing, Inc. TX | Transportation & Warehousing | 0 | — | A |
| Houston FM 529 Rig - Rig Equipment TX | Manufacturing | 0 | — | B |
| Houston Foam Plastic TX | Manufacturing | 0 | — | B |
| Houston Foam Plastics TX | Manufacturing | 0 | — | B |
| Houston Food Bank TX | Healthcare & Social Assistance | 0 | — | A |
| Houston Galveston Area Council TX | Public Administration | 3 | $63,333 | — |
| Houston GP Hotel Group, LLC TX | Accommodation & Food Services | 0 | — | A |
| Houston Grinding & Manufacturing Company, Inc. TX | Manufacturing | 0 | — | F |
| HOUSTON HEAT TREAT TX | Manufacturing | 0 | — | A |
| Houston Housing Management Corporation TX | Public Administration | 0 | — | A |
| Houston I Enterprises LLC TX | Healthcare & Social Assistance | 0 | — | D |
| Houston Independent School District TX | Educational Services | 38 | $169,675 | — |
| Houston Interiors, LLC TX | Construction | 0 | — | A |
| Houston Marriott Westchase TX | — | 0 | — | — |
| Houston Methodist TX | Healthcare & Social Assistance | 0 | — | F |
| Houston Methodist Baytown Hospital TX | Healthcare & Social Assistance | 0 | — | F |
| Houston Methodist Cypress Hospital TX | Healthcare & Social Assistance | 0 | — | A |
| Houston Methodist Hospital - Texas Medical Center TX | Healthcare & Social Assistance | 0 | — | F |
| Houston Methodist Hospital Sugarland TX | Healthcare & Social Assistance | 0 | — | F |
| Houston Methodist Hospital Willowbrook TX | Healthcare & Social Assistance | 0 | — | F |
| Houston Methodist Medical Office Bldg TX | Healthcare & Social Assistance | 0 | — | F |
| Houston Methodist Primary Care Group TX | Healthcare & Social Assistance | 0 | — | C |
| Houston Methodist Specialty Physicians TX | Professional & Technical Services | 3 | $282,006 | — |
| Houston Methodist St Catherine Continuing Care Hospital TX | Healthcare & Social Assistance | 0 | — | F |
| Houston Methodist St. John Hospital (Clear Lake) TX | Healthcare & Social Assistance | 0 | — | F |
| Houston Methodist The Woodlands TX | Healthcare & Social Assistance | 0 | — | F |
| Houston Metro Electrical Corporation TX | Construction | 0 | — | F |
| Houston Mfg. & Ins., Inc. CA | Construction | 0 | — | F |
| Houston Mooring Co Inc TX | Transportation & Warehousing | 0 | — | F |
| Houston NFL Holdings, L.P. TX | Arts & Entertainment | 0 | — | F |
| Houston NH LLC TX | Healthcare & Social Assistance | 0 | — | F |
| Houston Plating & Coatings TX | Manufacturing | 0 | — | D |
| Houston Plating Company TX | Manufacturing | 0 | — | A |
| Houston Post Tension INC TX | Manufacturing | 0 | — | F |
| Houston Production Services Inc. TX | Arts & Entertainment | 0 | — | F |
| Houston Products Processing, Inc. (dba HPP Corp) TX | Wholesale Trade | 0 | — | B |
| Houston Refining LP (2025) TX | — | 0 | — | — |
| Houston Regional Sports Network, L.P. TX | — | 0 | — | — |
| Houston SRO Housing TX | Public Administration | 0 | — | A |
| Houston Starr Company PA | Retail Trade | 0 | — | C |
| HOUSTON SYMPHONY SOCIETY TX | Arts & Entertainment | 0 | — | A |
