| | | | | |
| Subsidiary Issuer | Guarantor |
| Boardwalk Pipelines, LP 3.375% Notes due 2023 | Boardwalk Pipeline Partners, LP |
| Boardwalk Pipelines, LP 4.95% Notes due 2024 | Boardwalk Pipeline Partners, LP |
| Boardwalk Pipelines, LP 5.95% Notes due 2026 | Boardwalk Pipeline Partners, LP |
| Boardwalk Pipelines, LP 4.45% Notes due 2027 | Boardwalk Pipeline Partners, LP |
| Boardwalk Pipelines, LP 4.80% Notes due 2029 | Boardwalk Pipeline Partners, LP |
| Boardwalk Pipelines, LP 3.40% Notes due 2031 | Boardwalk Pipeline Partners, LP |
| Boardwalk Pipelines, LP 3.60% Notes due 2032 | Boardwalk Pipeline Partners, LP |