NEW YORK, Nov. 28, 2017 /PRNewswire/ -- Delphi Technologies plc (NYSE: DLPH- new) will replace Frontier Communications Corp. (NASD: FTR) in the S&P MidCap 400, and Frontier Communications will replace Contango Oil & Gas Co. (NYSE American: MCF) in the S&P SmallCap 600 effective prior to the open of trading on Wednesday, December 6. S&P 500 constituent Delphi Automotive plc (NYSE: DLPH), to be renamed Aptiv plc and trade under new symbol APTV, is spinning off Delphi Technologies in a transaction expected to be completed post close on Monday, December 4, pending final conditions. The renamed Aptiv plc will remain in the S&P 500 following the spin-off transaction.  Frontier Communications is ranked near the bottom of the S&P MidCap 400 and is no longer representative of the mid-cap market space. With a market capitalization below $100 million, Contango is ranked at the bottom of the S&P SmallCap 600 and is no longer representative of the small-cap market space.

Delphi Technologies manufactures power train vehicle propulsion systems.  Headquartered in Gillingham, United Kingdom, the company will be added to the S&P MidCap 400 GICS Auto Parts & Equipment Sub-Industry index.

Frontier Communications provides communications services to residential, business and wholesale customers. Headquartered in Norwalk, CT, the company will be added to the S&P SmallCap 600 GICS Integrated Telecommunication Services Sub-Industry index.

Following is a summary of the changes:

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