ChampionX Holding Inc.

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Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 (amendment)

Notice of Effectiveness

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Registration statement under Securities Act of 1933 (amendment)

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Registration statement under Securities Act of 1933 (amendment)

Letter from the SEC

Registration statement under Securities Act of 1933