MPWR - Monolithic Power gains 2.6% on move into S&P 500; COLL rises IRDM falls in shuffle

Monolithic Power Systems (MPWR) is up 2.6% after hours following news that it's moving into the S&P 500. There the company will replace TechnipFMC (FTI), which is being removed from the 500 in anticipation of its announced spin-off of Technip Energies likely to wrap next week. Iridium Communications (IRDM) is moving from the SmallCap 600 index into the MidCap 400 to replace Monolithic; [[IRDM]] is down 4.4% after hours. And taking Iridium's place in the SmallCap 600 is Collegium Pharmaceutical (COLL), which has risen 9.5% on the news. All changes are effective prior to the open of trading this Friday, Feb. 12.

For further details see:

Monolithic Power gains 2.6% on move into S&P 500; COLL rises, IRDM falls in shuffle