Chesapeake Energy Set to Join S&P MidCap 400

NEW YORK, Aug. 16, 2023 /PRNewswire/ -- Chesapeake Energy Corp. (NASD:CHK) will replace Mercury Systems Inc. (NASD: MRCY) in the S&P MidCap 400, and Mercury Systems will replace Arconic Corp. (NYSE: ARNC) in the S&P SmallCap 600 effective prior to the opening of trading on Monday, August 21. Apollo Global Management Inc. (NYSE:APO) is acquiring Arconic in a deal that is expected to close soon, pending final closing conditions. Mercury Systems is more representative of the small-cap market space.

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

August 21, 2023

S&P MidCap 400

Addition

Chesapeake Energy

CHK

Energy

August 21, 2023

S&P MidCap 400

Deletion

Mercury Systems

MRCY

Industrials

August 21, 2023

S&P SmallCap 600

Addition

Mercury Systems

MRCY

Industrials

August 21, 2023

S&P SmallCap 600

Deletion

Arconic

ARNC

Materials

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