Chime Financial Set to Join S&P MidCap 400

PR Newswire

NEW YORK, Nov. 13, 2026

NEW YORK , Nov. 13, 2026 /PRNewswire/ -- Chime Financial Inc. (NASD: CHYM) will replace NorthWestern Energy Group Inc. (NASD: NWE) in the S&P MidCap 400 effective prior to the opening of trading on Wednesday, November 18. S&P MidCap 400 constituent Black Hills Corp. (NYSE: BKH) is acquiring NorthWestern Energy Group in a deal expected to be completed today. Post-merger, the combined company will remain in the S&P MidCap 400 and will be renamed Bright Horizon Energy Corp. (NYSE: HZN).

Following is a summary of the changes that will take place prior to the open of trading on the effective date:

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