NEW YORK, Dec. 12, 2025 /PRNewswire/ -- Corebridge Financial Inc. (NYSE:CRBG) will replace Allete Inc. (NYSE:ALE) in the S&P MidCap 400 effective prior to the open of trading on Wednesday, December 17. Canada Pension Plan Investment Board and Global Infrastructure Partners are acquiring Allete in a deal expected to close soon, pending final closing conditions.

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

Effective Date	Index Name	Action	Company Name	Ticker	GICS Sector
Dec 17, 2025	S&P MidCap 400	Addition	Corebridge Financial	CRBG	Financials
Dec 17, 2025	S&P MidCap 400	Deletion	Allete	ALE	Utilities

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SOURCE S&P Dow Jones Indices

Corebridge Financial Set to Join S&P MidCap 400