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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