Calfrac Well Services Ltd. — Proxy Solicitation & Information Statement 2021

Apr 20, 2021

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Date: April 19, 2021

324-8th Avenue SW, 8th floor Calgary AB, T2P 2Z2 www.computershare.com

To: All Canadian Securities Regulatory Authorities

AMENDED

Subject: CALFRAC WELL SERVICES LTD

Dear Sir/Madam:

We advise of the following with respect to the upcoming Meeting of Security Holders for the subject Issuer:

Meeting Type : Annual Meeting Record Date for Notice of Meeting : March 16, 2021 Record Date for Voting (if applicable) : March 16, 2021 Beneficial Ownership Determination Date : March 16, 2021 Meeting Date : May 04, 2021 Meeting Location (if available) : VIRTUAL MEETING Issuer sending proxy related materials directly to NOBO: No Issuer paying for delivery to OBO: Yes

Notice and Access (NAA) Requirements:

NAA for Beneficial Holders Yes Beneficial Holders Stratification Criteria: Not Applicable NAA for Registered Holders No

Voting Security Details:

Description CUSIP Number ISIN COMMON SHARES NEW 129584405 CA1295844056 COMMON SHARES 144A RESTRICTED 129584504 US1295845044

Sincerely,

Computershare

Agent for CALFRAC WELL SERVICES LTD