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NEW YORK, Nov. 21, 2024 /PRNewswire/ -- S&P MidCap 400 constituent Texas Pacific Land Corp. (NYSE: TPL) will replace Marathon Oil Corp. (NYSE: MRO) in the S&P 500, S&P SmallCap 600 constituent Mueller Industries Inc. (NYSE: MLI) will replace Texas Pacific Land in the S&P MidCap 400, and Atlas Energy Solutions Inc. (NYSE: AESI) will replace Mueller Industries in the S&P SmallCap 600 effective prior to the opening of trading on Tuesday, November 26. S&P 500 & 100 constituent ConocoPhillips (NYSE: COP) is acquiring Marathon Oil in a deal expected to close November 22, pending final closing conditions. Texas Pacific Land and Mueller Industries have company level market capitalizations that are more representative of the large-cap and mid-cap market space, respectively.
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 26, 2024 | S&P 500 | Addition | Texas Pacific Land | TPL | Energy |
| November 26, 2024 | S&P 500 | Deletion | Marathon Oil | MRO | Energy |
| November 26, 2024 | S&P MidCap 400 | Addition | Mueller Industries | MLI | Industrials |
| November 26, 2024 | S&P MidCap 400 | Deletion | Texas Pacific Land | TPL | Energy |
| November 26, 2024 | S&P SmallCap 600 | Addition | Atlas Energy Solutions | AESI | Energy |
| November 26, 2024 | S&P SmallCap 600 | Deletion | Mueller Industries | MLI | Industrials |
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SOURCE S&P Dow Jones Indices