Chime Financial Joins S&P MidCap 400 Index

Chime Financial Inc. will join the S&P MidCap 400 index effective before the start of trading on Wednesday, November 18, 2026. The fintech company replaces NorthWestern Energy Group Inc., which is being removed from the index due to its acquisition by Black Hills Corp.

The acquisition of NorthWestern Energy Group is expected to close on November 13. Following the merger, the combined entity will be renamed Bright Horizon Energy Corp. and will maintain its existing position within the S&P MidCap 400 index.