NiSource spinoff Columbia Pipeline Group (CPGX) is taking Allegeheny Technologies' (NYSE:ATI) spot in the S&P 500. Allegheny will join the S&P MidCap 400.
Also joining the S&P 400: Casey's General Stores (NASDAQ:CASY), Graham Holdings spinoff Cable One, DuPont spinoff Chemours, and the post-spinoff Energizer (NYSE:ENR).
Getting dropped to the S&P SmallCap 600 from the 400: Unit Corp. (NYSE:UNT), Harsco (NYSE:HSC), and Semtech (NASDAQ:SMTC).
Also joining the S&P 600: Nektar (NASDAQ:NKTR), Masco spinoff TopBuild, and the new/post-spinoff Gannett (NYSE:GCI). Gannett's broadcast/digital spinoff Tegna (Pending:TGNA) will have old Gannett's spot in the S&P 500.
Getting dropped from the S&P 600, and not moving up: Aeropostale (NYSE:ARO), Paragon Offshore (NYSE:PGN), PetroQuest (NYSE:PQ), Quiksilver (NYSE:ZQK), and FXCM.
Leaving the S&P 400, and not moving elsewhere: Peabody (NYSE:BTU) and AOL (acquired by Verizon).
Elizabeth Dolan has resigned from Quicksilver's (NYSE:ZQK) board, writing "Your lack of trust in me has been made clear" and saying she had been excluded from key discussions and votes. "On my end, this can't be rebuilt."
Dolan is chief marketing officer for Fox International Channels, and previously worked as CMO for OWN: The Oprah Winfrey Network.
Quicksilver tumbled amid turmoil earlier this spring when its CEO and CFO were pushed out of the company.
Shares were up 5.1% today after setting a 52-week low of $1.18 yesterday. Before today's move, the stock was down more than 46% YTD.