Northern Illinois Gas Co Watch

from 10-Q 6 pages Supplemental Indenture Dated October 26, 2012 Northern Illinois Gas Company to the Bank of New York Mellon Trust Company, N.A. Trustee Under Indenture Dated as of January 1, 1954 and Supplemental Indentures Thereto

from 10-K 14 pages This Supplemental Indenture, Made as of January 25, 2011 and Effective February 1, 2011, Between Northern Illinois Gas Company, a Corporation Organized and Existing Under the Laws of the State of Illinois (Hereinafter Called the “Company”), and the Bank of New York Mellon Trust Company, N.A. (Hereinafter Called the “Trustee”), as Successor Trustee Under an Indenture Dated as of January 1, 1954, as Supplemented by Supplemental Indentures Dated (Or Made Effective), Respectively, February 9, 1954, April 1, 1956, June 1, 1959, July 1, 1960, June 1, 1963, July 1, 1963, August 1, 1964, August 1, 1965, May 1, 1966, August 1, 1966, July 1, 1967, June 1, 1968, December 1, 1969, August 1, 1970, June 1, 1971, July 1, 1972, July 1, 1973, April 1, 1975, April 30, 1976, April 30, 1976, July 1, 1976, August 1, 1976, December 1, 1977, January 15, 1979, December 1, 1981, March 1, 1983, October 1, 1984, December 1, 1986, March 15, 1988, July 1, 1988, July 1, 1989, July 15, 1990, August 15, 1991, July 15, 1992, February 1, 1993, March 15, 1993, May 1, 1993, July 1, 1993, August 15, 1994, October 15, 1995, May 10, 1996, August 1, 1996, June 1, 1997, October 15, 1997, February 15, 1998, June 1, 1998, February 1, 1999, February 1, 2001, May 15, 2001, August 15, 2001, December 15, 2001, December 1, 2003, December 15, 2006, August 15, 2008 and July 30, 2009, Such Indenture Dated as of January 1, 1954, as So Supplemented, Being Hereinafter Called the “Indenture.”

from 10-Q 13 pages When Recorded Return To: Real Estate Department Nicor Gas P.O. Box 190 Aurora, Il 60507 Attn: Dave Behrens Space Above This Line Reserved for Recorder’s Use Only

from S-3 13 pages Supplemental Indenture Made as of [ ], to Be Effective [ ] Northern Illinois Gas Company to the Bank of New York Mellon Trust Company, N.A. Trustee Under Indenture Dated as of January 1, 1954 and Supplemental Indentures Thereto First Mortgage Bonds [ ] Series Due [ ]

from 10-Q 14 pages When Recorded Return To: Nicor Gas Attn: Dave Behrens 1844 Ferry Road Naperville, Il 60653-9600 Space Above This Line Reserved for Recorder’s Use Only

from 10-K 14 pages When Recorded Return To: Nicor Gas Attn: Dave Behrens 1844 Ferry Road Naperville, Il 60653-9600 Space Above This Line Reserved for Recorder’s Use Only

from 10-K ~10 pages 411 Supplemental

from 10-K ~10 pages 410 Supplemental

from 10-K ~10 pages 409 Supplemental Indenture

from 10-K405 ~10 pages Supplemental Agreement

from 10-Q ~10 pages Supplemental Indenture

from S-3 ~10 pages Form of Proposed Supplemental Indenture

from S-3 ~10 pages Supplemental Indenture of the Company

from 10-K405 ~10 pages Supplemental Indenture

from 10-K405 ~10 pages Supplemental Indenture

from S-3 ~10 pages Supplemental Indenture

from 10-Q ~10 pages Supplemental Indenture

from 10-K405 ~10 pages Supplemental Indenture

from S-3 ~10 pages Form of Proposed Supplement Indentures

from 10-Q ~10 pages Supplemental Indenture