CGG HOLDING (U.S.) INC.

Q: Oct 31 2006

FY: Jul 31 2006

FY: Jul 31 2006

Q: Apr 30 2006

Q: Jan 31 2006

Q: Oct 31 2005

FY: Jul 31 2005

Q: Apr 30 2005

Q: Jan 31 2005

Q: Oct 31 2004

FY: Jul 31 2004

FY: Jul 31 2004

FY: Jul 31 2004

Q: Apr 30 2004

Q: Dec 31 2003

Q: Oct 31 2003

FY: Jul 31 2003

Q: Apr 30 2003

Q: Jan 31 2003

Q: Oct 31 2002

Unregistered Sales of Equity Securities

Entry into a Material Definitive Agreement

2.02,8.01,9.01

8.01,9.01

2.02,8.01,9.01

1.01,7.01,9.01

1.01,5.03,9.01

2.02,9.01

8.01,9.01

1.01

2.02,9.01

1.01,9.01

8.01,9.01

Regulation FD Disclosure

Results of Operations and Financial Condition

1.01,5.02,9.01

1.01,5.02,9.01

1.01,9.01

2.02,9.01

5.01,9.01

Notice of Effectiveness

Registration statement for securities of certain foreign private issuers issued in certain business combination transactions (amendment)

Registration statement for securities of certain foreign private issuers issued in certain business combination transactions (amendment)

Registration statement for securities of certain foreign private issuers issued in certain business combination transactions

Notice of Effectiveness

Registration statement for securities of certain foreign private issuers issued in certain business combination transactions

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Withdrawal of a registration statement

Registration statement for securities of certain foreign private issuers issued in certain business combination transactions (amendment)

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

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

Automatic Shelf Registration

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

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

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BARCLAYS GLOBAL INVESTORS NA /CA/

PILENKO THIERRY

RENAISSANCE TECHNOLOGIES CORP

RENAISSANCE TECHNOLOGIES CORP

BARCLAYS GLOBAL INVESTORS NA /CA/

PILENKO THIERRY

WELLS TIMOTHY L

CORMIER CLAYTON P

RASK JAN A

BALDWIN DENNIS S

Shoham Yoram

GIBBS JAMES R

Young Terence K

CARROLL LOREN K

WORK DAVID F

WORDEN LARRY L

BALDWIN MARK E

WORDEN LARRY L

WELLS TIMOTHY L

BALDWIN MARK E

For applications for qualification of indentures under the Trust Indenture Act of 1939 (amendment)

For applications for qualification of indentures under the Trust Indenture Act of 1939 (amendment)

For applications for qualification of indentures under the Trust Indenture Act of 1939 (amendment)

For applications for qualification of indentures under the Trust Indenture Act of 1939 (amendment)

Letter from the SEC

For applications for qualification of indentures under the Trust Indenture Act of 1939

For applications for qualification of indentures under the Trust Indenture Act of 1939

Letter from the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC