On March 14, 2022, HollyFrontier Corp. (HFC) closed on its acquisition of Sinclair Oil Corp., and the newly merged company is HF Sinclair Corp. We assigned our 'BBB-' issuer credit rating to HF Sinclair Corp. The outlook is stable. There are no changes to the 'BBB-' senior unsecured issue rating on HFC. The ratings on midstream-focused subsidiary, Holly Energy Partners (HEP), are also unchanged. The stable outlook reflects our expectation of debt to EBITDA of 1.5x under midcycle conditions. HF Sinclair's refining assets are well positioned to take advantage of periods of favorable pricing differentials between West Texas Intermediate (WTI) crude, Brent, and Louisiana Light Sweet crude, and Western Canadian Select. We believe the company's profitability is stronger than its