CGG HOLDING (U.S.) INC.

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

Notice of Effectiveness

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

Letter from the SEC

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

Letter from the SEC

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

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Prospectus Supplement for Primary Offering

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

Automatic Shelf Registration

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

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

Unregistered Sales of Equity Securities

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Additional Information for Proxy Statement/ Votes

Written communication about a business combination transaction (Rule 425)

Entry into a Material Definitive Agreement

Additional Information for Proxy Statement/ Votes

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

General form for quarterly reports under Section 13 or 15(d)

2.02,8.01,9.01

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

No description available

Annual report pursuant to Section 13 or 15(d) (amendment)

8.01,9.01

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

Annual report pursuant to Section 13 or 15(d)

2.02,8.01,9.01

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

1.01,7.01,9.01

1.01,5.03,9.01

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

8.01,9.01

1.01

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

Letter from the SEC

Correspondence with the SEC

1.01,9.01

Letter from the SEC

Correspondence with the SEC

8.01,9.01

Regulation FD Disclosure

Correspondence with the SEC

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Letter from the SEC

1.01,5.02,9.01

1.01,5.02,9.01

1.01,9.01

Annual report pursuant to Section 13 or 15(d)

2.02,9.01

5.01,9.01

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d) (amendment)

Annual report pursuant to Section 13 or 15(d)

Notification of late filing of Form 10-K

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

PILENKO THIERRY

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