GREY WOLF INTERNATIONAL, INC.

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 Canadian issuers

Notice of Effectiveness

Registration statement for securities of certain Canadian issuers

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

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

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

Prospectus Supplement for Primary Offering

Post-effective amendment to a registration statement

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Post-effective amendment to a registration statement

Prospectus Supplement for Primary Offering

Correspondence with the SEC

Correspondence with the SEC

Registration statement for securities of certain Canadian issuers (amendment)