S&P Global Market Intelligence presents a periodic rundown of selected ratings actions on U.S. energy companies. The changes, confined to upgrades, downgrades and changes in outlook, are listed by announcement date in reverse chronological order.

Feb. 12

* S&P Global Ratings lifted its ratings on Continental Resources Inc. to investment grade, expecting the oil and gas company to keep spending in line with cash flows while improving production.

Feb. 7

* S&P Global Ratings upgraded Terraform Global Operating LLC's corporate credit rating to BB- from B+ and its stand-alone credit profile to "b+" from "b" following its move to offer up to $400 million of senior notes due 2026 to redeem its outstanding senior notes due 2022.

Feb. 6

* S&P Global Ratings revised its outlook on ALLETE Inc. to negative from stable, after the Minnesota Public Utilities Commission granted a $12.6 million rate increase for subsidiary Minnesota Power Inc.

Feb. 5

* S&P Global Ratings lifted its ratings on Antero Resources Corp., noting the exploration and production company's plan to live within its cash flow.

* Moody's downgraded the ratings of SCANA Corp. and its subsidiary South Carolina Electric & Gas Co. following legislative action in the South Carolina General Assembly that temporarily halts recovery of investments in the abandoned V.C. Summer nuclear reactors.

* Fitch Ratings flagged NorthWestern Corp. for a possible one-notch downgrade and revised the company's outlook to negative.

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