NEW YORK, June 8, 2026 /PRNewswire/ — Sirius XM Holdings Inc. (NASD: SIRI) will replace Masimo Corp. (NASD: MASI) in the S&P MidCap 400 effective prior to the opening of trading on Thursday, June 11. S&P 500 & 100 constituent Danaher Corp. (NYSE: DHR) is acquiring Masimo in a deal expected to be completed soon pending final conditions.
Following is a summary of the changes that will take place prior to the open of trading on the effective date:
|
Effective |
Index |
Action |
Company Name |
Ticker |
GICS Sector |
|
|
June 11, 2026 |
S&P MidCap 400 |
Addition |
Sirius XM Holdings |
SIRI |
Communication Services |
|
|
June 11, 2026 |
S&P MidCap 400 |
Deletion |
Masimo |
MASI |
Health Care |
|
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