Company · CIK 1336047 # Boardwalk Pipeline Partners, LP | CIK | [1336047](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001336047) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 4922 — Natural Gas Transmission | | Incorporated in | DE | | Business address | TX | | Listed | no ticker on SEC record today | | First annual or quarterly report | 2006-03-16 | ## Offerings 13 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-294210 | Shelf Effective | 2026-03-11 | 2026-03-19 | 2 | | 333-274067 | Shelf Effective | 2023-08-18 | 2025-11-13 | 4 | | 333-252934 | Shelf Effective | 2021-02-10 | 2022-02-09 | 3 | | 333-228714 | Shelf Effective | 2018-12-07 | 2020-08-04 | 4 | | 333-208626 | Shelf Effective | 2015-12-18 | 2018-07-20 | 4 | | 333-208627 | Shelf Effective | 2015-12-18 | 2017-01-05 | 3 | | 333-186768 | Shelf Effective | 2013-02-20 | 2015-03-12 | 5 | | 333-186767 | Shelf Effective | 2013-02-20 | 2013-08-30 | 3 | | 333-166373 | Shelf Effective | 2010-04-29 | 2012-11-05 | 4 | | 333-141058 | Shelf Final prospectus | 2007-03-05 | 2010-02-18 | 3 | | 333-137489 | Registered company Final prospectus | 2006-09-21 | 2006-11-17 | 5 | | 333-137690 | Registered company Final prospectus | 2006-09-29 | 2006-11-17 | 5 | | 333-127578 | IPO Final prospectus | 2005-08-16 | 2005-11-09 | 7 | ## Filings 52 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2026-03-19 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1336047/999999999526000877/9999999995-26-000877-index.htm) Declared effective | 333-294210 | 9999999995-26-000877 | | 2026-03-11 | [S-3](https://www.sec.gov/Archives/edgar/data/1336047/000119312526102137/0001193125-26-102137-index.htm) Shelf registered | 333-294210 | 0001193125-26-102137 | | 2025-11-13 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312525279136/0001193125-25-279136-index.htm) Shelf takedown | 333-274067 | 0001193125-25-279136 | | 2024-02-08 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312524027651/0001193125-24-027651-index.htm) Shelf takedown | 333-274067 | 0001193125-24-027651 | | 2023-09-15 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1336047/999999999523002674/9999999995-23-002674-index.htm) Declared effective | 333-274067 | 9999999995-23-002674 | | 2023-08-18 | [S-3](https://www.sec.gov/Archives/edgar/data/1336047/000119312523215751/0001193125-23-215751-index.htm) Shelf registered | 333-274067 | 0001193125-23-215751 | | 2022-02-09 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312522032101/0001193125-22-032101-index.htm) Shelf takedown | 333-252934 | 0001193125-22-032101 | | 2021-02-22 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1336047/999999999521000707/9999999995-21-000707-index.htm) Declared effective | 333-252934 | 9999999995-21-000707 | | 2021-02-10 | [S-3](https://www.sec.gov/Archives/edgar/data/1336047/000119312521035237/0001193125-21-035237-index.htm) Shelf registered | 333-252934 | 0001193125-21-035237 | | 2020-08-04 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312520208834/0001193125-20-208834-index.htm) Shelf takedown | 333-228714 | 0001193125-20-208834 | | 2019-04-30 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312519127490/0001193125-19-127490-index.htm) Shelf takedown | 333-228714 | 0001193125-19-127490 | | 2018-12-18 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1336047/999999999518003159/9999999995-18-003159-index.htm) Declared effective | 333-228714 | 9999999995-18-003159 | | 2018-12-07 | [S-3](https://www.sec.gov/Archives/edgar/data/1336047/000119312518344942/0001193125-18-344942-index.htm) Shelf registered | 333-228714 | 0001193125-18-344942 | | 2018-07-20 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1336047/999999999518001838/9999999995-18-001838-index.htm) Declared effective | 333-208626 | 9999999995-18-001838 | | 2017-01-05 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312517002449/0001193125-17-002449-index.htm) Shelf takedown | 333-208627 | 0001193125-17-002449 | | 2016-08-01 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312516666533/0001193125-16-666533-index.htm) Shelf takedown | 333-208626 | 0001193125-16-666533 | | 2016-05-11 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312516586471/0001193125-16-586471-index.htm) Shelf takedown | 333-208627 | 0001193125-16-586471 | | 2016-01-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1336047/999999999516003472/9999999995-16-003472-index.htm) Declared effective | 333-208626 | 9999999995-16-003472 | | 2015-12-18 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1336047/000119312515407828/0001193125-15-407828-index.htm) Shelf registered | 333-208627 | 0001193125-15-407828 | | 2015-12-18 | [S-3](https://www.sec.gov/Archives/edgar/data/1336047/000119312515407824/0001193125-15-407824-index.htm) Shelf registered | 333-208626 | 0001193125-15-407824 | | 2015-03-12 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312515087658/0001193125-15-087658-index.htm) Shelf takedown | 333-186768 | 0001193125-15-087658 | | 2015-03-10 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000095012315003873/0000950123-15-003873-index.htm) Shelf takedown | 333-186768 | 0000950123-15-003873 | | 2014-11-19 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312514417725/0001193125-14-417725-index.htm) Shelf takedown | 333-186768 | 0001193125-14-417725 | | 2013-08-30 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312513352372/0001193125-13-352372-index.htm) Shelf takedown | 333-186767 | 0001193125-13-352372 | | 2013-05-29 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312513239509/0001193125-13-239509-index.htm) Shelf takedown | 333-186768 | 0001193125-13-239509 | | 2013-05-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1336047/999999999513001408/9999999995-13-001408-index.htm) Declared effective | 333-186767 | 9999999995-13-001408 | | 2013-02-20 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1336047/000119312513067421/0001193125-13-067421-index.htm) Shelf registered | 333-186768 | 0001193125-13-067421 | | 2013-02-20 | [S-3](https://www.sec.gov/Archives/edgar/data/1336047/000119312513067402/0001193125-13-067402-index.htm) Shelf registered | 333-186767 | 0001193125-13-067402 | | 2012-11-05 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312512450623/0001193125-12-450623-index.htm) Shelf takedown | 333-166373 | 0001193125-12-450623 | | 2012-10-03 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312512414034/0001193125-12-414034-index.htm) Shelf takedown | 333-166373 | 0001193125-12-414034 | | 2012-08-01 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312512328860/0001193125-12-328860-index.htm) Shelf takedown | 333-166373 | 0001193125-12-328860 | | 2010-04-29 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1336047/000119312510098770/0001193125-10-098770-index.htm) Shelf registered | 333-166373 | 0001193125-10-098770 | | 2010-02-18 | [424B4](https://www.sec.gov/Archives/edgar/data/1336047/000119312510034287/0001193125-10-034287-index.htm) Final prospectus | 333-141058 | 0001193125-10-034287 | | 2008-06-10 | [424B5](https://www.sec.gov/Archives/edgar/data/1336047/000119312508130551/0001193125-08-130551-index.htm) Shelf takedown | 333-141058 | 0001193125-08-130551 | | 2007-03-05 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1336047/000119312507045695/0001193125-07-045695-index.htm) Shelf registered | 333-141058 | 0001193125-07-045695 | | 2006-11-17 | [424B4](https://www.sec.gov/Archives/edgar/data/1336047/000119312506238043/0001193125-06-238043-index.htm) Final prospectus | 333-137690 | 0001193125-06-238043 | | 2006-11-17 | [424B4](https://www.sec.gov/Archives/edgar/data/1336047/000119312506238042/0001193125-06-238042-index.htm) Final prospectus | 333-137489 | 0001193125-06-238042 | | 2006-11-16 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1336047/999999999506002381/9999999995-06-002381-index.htm) Declared effective | 333-137690 | 9999999995-06-002381 | | 2006-11-16 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1336047/999999999506002380/9999999995-06-002380-index.htm) Declared effective | 333-137489 | 9999999995-06-002380 | | 2006-11-16 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1336047/000119312506236853/0001193125-06-236853-index.htm) Amendment | 333-137690 | 0001193125-06-236853 | | 2006-11-16 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1336047/000119312506236850/0001193125-06-236850-index.htm) Amendment | 333-137489 | 0001193125-06-236850 | | 2006-11-14 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1336047/000119312506235139/0001193125-06-235139-index.htm) Amendment | 333-137690 | 0001193125-06-235139 | | 2006-11-14 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1336047/000119312506234875/0001193125-06-234875-index.htm) Amendment | 333-137489 | 0001193125-06-234875 | | 2006-09-29 | [S-1](https://www.sec.gov/Archives/edgar/data/1336047/000119312506200207/0001193125-06-200207-index.htm) Registration filed | 333-137690 | 0001193125-06-200207 | | 2006-09-21 | [S-1](https://www.sec.gov/Archives/edgar/data/1336047/000119312506194224/0001193125-06-194224-index.htm) Registration filed | 333-137489 | 0001193125-06-194224 | | 2005-11-09 | [424B1](https://www.sec.gov/Archives/edgar/data/1336047/000119312505220978/0001193125-05-220978-index.htm) Final prospectus | 333-127578 | 0001193125-05-220978 | | 2005-11-04 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1336047/000119312505217025/0001193125-05-217025-index.htm) Amendment | 333-127578 | 0001193125-05-217025 | | 2005-10-31 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1336047/000119312505211896/0001193125-05-211896-index.htm) Amendment | 333-127578 | 0001193125-05-211896 | | 2005-10-24 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1336047/000119312505206853/0001193125-05-206853-index.htm) Amendment | 333-127578 | 0001193125-05-206853 | | 2005-10-12 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1336047/000119312505200233/0001193125-05-200233-index.htm) Amendment | 333-127578 | 0001193125-05-200233 | | 2005-09-22 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1336047/000119312505189935/0001193125-05-189935-index.htm) Amendment | 333-127578 | 0001193125-05-189935 | | 2005-08-16 | [S-1](https://www.sec.gov/Archives/edgar/data/1336047/000119312505169286/0001193125-05-169286-index.htm) Registration filed | 333-127578 | 0001193125-05-169286 | [All filings of this company](https://equitycapital.markets/filings?cik=1336047) · [CSV](https://equitycapital.markets/filings.csv?cik=1336047) --- Source page: https://equitycapital.markets/company/1336047 · Data: U.S. SEC EDGAR · CC BY 4.0