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:
Effective Date Index Name Action Company Name Ticker GICS Sector
November 18, 2026 S&P MidCap 400 Addition
Chime Financial CHYM Financials
November 18, 2026 S&P MidCap 400 Deletion NorthWestern Energy Group NWE Utilities
ABOUT S&P DOW JONES INDICES
S&P Dow Jones Indices is the largest global resource for essential index-based concepts, data and research, and home to iconic financial market indicators, such as the S&P 500® and the Dow Jones Industrial Average®. More assets are invested in products based on our indices than products based on indices from any other provider in the world. Since Charles Dow invented the first index in 1884, S&P DJI has been innovating and developing indices across the spectrum of asset classes helping to define the way investors measure and trade the markets.
S&P Dow Jones Indices is a division of S&P Global (NYSE: SPGI), which provides essential intelligence for individuals, companies, and governments to make decisions with confidence. For more information, visit www.spglobal.com/spdji/en/.
FOR MORE INFORMATION:
S&P Dow Jones Indices
index_services@spglobal.com
Media Inquiries
spdji.comms@spglobal.com
View original content:https://www.prnewswire.com/news-releases/chime-financial-set-to-join-sp-midcap-400-302939428.html
SOURCE S&P Dow Jones Indices
