 Sitio Royalties Corp. STR, -1.55 rose 3.9 in premarket trades on Wednesday, the day after the companys shares fell on its all-stock, 4.8 billion merger deal with Brigham Minerals Inc. MNRL, -4.66 . Sitio Royalties stock dropped 1.6 and Brigham shares gave up 4.7 on Tuesday. 