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- Organon & Co. (NYSE: OGN) will be added to the S&P 500 prior to the open of trading on Thursday, June 3 replacing HollyFrontier, which will be removed from the S&P 500 effective prior to the open of trading on Friday, June 4 .
HollyFrontier will replace Service Properties Trust (NASD:SVC) in the S&P MidCap 400, and Service Properties Trust will replace Lannett Co Inc. (NYSE:LCI) in the S&P SmallCap 600 also effective prior to the open on June 4 . S&P 500 and 100 constituent Merck & Co (NYSE: MRK) is spinning off Organon (NYSE: OGN) in a transaction expected to be completed post close on Wednesday, June 2 . Post spin-off, Merck will remain in the S&P 500 and 100 indices. HollyFrontier has a market capitalization more representative of the mid-cap market space. Lannett is no longer representative of the small-cap market space.
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 |
| June 3, 2021 | S&P 500 | Addition | Organon | OGN | Health Care |
| June 4, 2021 | S&P 500 | Deletion | HollyFrontier | HFC | Energy |
| | S&P MidCap 400 | Addition | HollyFrontier | HFC | Energy |
| | S&P MidCap 400 | Deletion | Service Properties Trust | SVC | Real Estate |
| | S&P SmallCap 600 | Addition | Service Properties Trust | SVC | Real Estate |
| | S&P SmallCap 600 | Deletion | Lannett Co | LCI | Health Care |
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View original content: https://www.prnewswire.com/news-releases/organon-set-to-join-sp-500-hollyfrontier-to-join-sp-midcap-400-service-properties-trust-to-join-sp-smallcap-600-301301349.html
SOURCE S&P Dow Jones Indices
