SOUTHERN NATURAL GAS COMPANY, L.L.C.

Q: Mar 31 2012

FY: Dec 31 2011

Q: Sep 30 2011

Q: Jun 30 2011

Q: Mar 31 2011

FY: Dec 31 2010

Q: Sep 30 2010

Q: Jun 30 2010

Q: Mar 31 2010

FY: Dec 31 2009

Q: Sep 30 2009

Q: Jun 30 2009

Q: Mar 31 2009

FY: Dec 31 2008

Q: Sep 30 2008

Q: Jun 30 2008

Q: Mar 31 2008

FY: Dec 31 2007

Q: Sep 30 2007

Q: Jun 30 2007

1.01,2.03,8.01,9.01

Other Events

5.01,5.03,9.01

2.02

2.02

5.02

2.02,9.01

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

2.02,9.01

2.02,9.01

2.02,9.01

2.02,9.01

Results of Operations and Financial Condition

3.03,8.01,9.01

Regulation FD Disclosure

Regulation FD Disclosure

2.01,9.01

Material Modifications to Rights of Security Holders

1.01,3.03,9.01

Entry into a Material Definitive Agreement

Automatic Shelf Registration

Prospectus Supplement for Delayed or Continuous Offering

Prospectus Supplement for Delayed or Continuous Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Delayed or Continuous Offering

Prospectus Supplement for Primary Offering

Automatic Shelf Registration

Notice of Effectiveness

Post-effective amendment to a registration statement

Certification of termination of registration of a class of securities (Section 12(b))

Post-effective amendment to a registration statement

Notice of Effectiveness

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Notice of Effectiveness

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Withdrawal of a registration statement

Post-effective amendment to an automatic shelf registration statement

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Notification of the removal from listing and registration of matured redeemed or retired securities