Pub. 4 2022-2023 Issue 3

Thank You Chairman’s Circle Members Big West Oil is committed to be a top-tier refiner, marketer, and employer in the Rocky Mountain Region, focused on building lasting value through operational excellence, continuous improvement, and pursuit of internal and external growth opportunities. Uinta Wax explores and produces oil and gas. The company offers natural gas, crude oil and other related products. Uinta Wax serves customers throughout the United States. Chevron’s success is driven by our people and their commitment to getting the results the right way — by operating responsibly, executing with excellence, applying innovative technologies and capturing new opportunities for profitable growth. ConocoPhillips is the world’s largest independent E&P company based on proved reserves and production of liquids and natural gas. Ovintiv is a leading North American resource play company focused on oil and natural gas production, growing its strong multi-basin portfolio and increasing shareholder value and profitability. By partnering with employees, community organizations and local businesses. Greylock’s leadership is an experienced team with decades in the energy industry and possessing a wealth of knowledge and unmatched expertise relating to operations, particularly in shale development. HF Sinclair, headquartered in Dallas, TX, is an independent petroleum refiner and marketer that produces high-value light products such as gasoline, diesel fuel, jet fuel and other specialty products. HF Sinclair produces base oils and other specialized lubricants in the U.S., Canada and the Netherlands, and exports products to more than 80 countries. Marathon Petroleum Company is in the business of creating value for our shareholders through the quality products and services we provide for our customers. As a result, we strive to always act responsibly with those who work for us, with those business partners who work with us, and in every community where we operate. 20 UPDATE

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