KEYSPAN CORP

Q: Jun 30 2007

Q: Mar 31 2007

FY: Dec 31 2006

Q: Sep 30 2006

Q: Jun 30 2006

Q: Mar 31 2006

FY: Dec 31 2005

FY: Dec 31 2005

Q: Sep 30 2005

Q: Jun 30 2005

Q: Mar 31 2005

FY: Dec 31 2004

Q: Sep 30 2004

Q: Jun 30 2004

Q: Mar 31 2004

FY: Dec 31 2003

Q: Sep 30 2003

Q: Jun 30 2003

FY: Dec 31 2002

Q: Mar 31 2003

3.01,5.01,5.02,5.03

Results of Operations and Financial Condition

1.01,9.01

1.01,9.01

8.01,9.01

8.01

2.02,9.01

Other Events

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

Entry into a Material Definitive Agreement

2.02,9.01

1.01,9.01

Results of Operations and Financial Condition

Regulation FD Disclosure

2.02,9.01

Entry into a Material Definitive Agreement

1.01,9.01

Other Events

7.01,8.01,9.01

Notification of removal from listing and/or registration on a national securities exchange

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

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933

Withdrawal of a registration statement

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Registration of Securities on Exchange (amendment)

Prospectus Supplement for Primary Offering

Prospectus Supplement for Delayed or Continuous Offering

Registration of Securities on Exchange

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

No description available

Additional Information for Proxy Statement/ Votes

No description available

No description available

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

JONES JAMES R

MCKESSY STEPHEN W

FISHMAN ALAN H

MILLER EDWARD D

PRYOR VIKKI L

CHRISTENSEN ANDREA S

LARSON GLORIA C

LAROCCA JAMES L

WEINSTEIN ELAINE

FANI ROBERT J

LUTERMAN GERALD

ZELKOWITZ STEVEN L

CAROSELLI JOHN A

TAUNTON MICHAEL J

MANNING DAVID J

BODANZA JOSEPH F

STAVROPOULOS NICKOLAS

SARTOR ANTHONY

BALOG THERESA A

HARAN JOHN F

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

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

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

No description available

No description available

No description available