Calfrac Well Services Ltd. is a Canadian-based provider of specialized oilfield services, focusing on hydraulic fracturing, coiled tubing, cementing, and other well stimulation techniques to enhance oil and natural gas production. Founded in 1999 and headquartered in Calgary, Alberta, the company operates primarily in North America, including key regions in Western Canada and the United States, as well as in Argentina's Vaca Muerta play.

Recognized as the largest Canadian-headquartered pressure pumping company by horsepower, Calfrac boasts a fleet of approximately 1.2 million horsepower. The company emphasizes a safety-first culture and collaborates closely with customers to deliver tailored solutions. Its diverse customer base includes multinational public companies, national oil and gas firms, and smaller private exploration and production companies. Calfrac is publicly traded on the Toronto Stock Exchange under the symbol CFW.

In addition to its core services, Calfrac is dedicated to community involvement, supporting various initiatives in environment, education, social services, and the arts through volunteering and donations.