NEW YORK, March 28, 2018 /PRNewswire/ -- S&P MidCap 400 constituent MSCI Inc. (NYSE: MSCI) will replace CSRA Inc. (NYSE: CSRA) in the S&P 500, S&P SmallCap 600 constituent Lumentum Holdings Inc. (NASD: LITE) will replace MSCI in the S&P MidCap 400 and C&J Energy Services Inc. (NYSE: CJ) will replace Lumentum Holdings in the S&P SmallCap 600 effective prior to the open on trading on Wednesday, April 4. S&P 500 constituent General Dynamics Corp. (NYSE: GD) is acquiring CSRA in a deal expected to close soon pending final conditions.

S&P Dow Jones Indices announces a clarification to the S&P U.S. Indices methodology regarding public offerings of existing shares by selling shareholders. Any concurrent share repurchase or share issuance by the affected company, even if less than 5%, will also be included in the share change as long as the selling shareholder's stake equals at least 5% of the total shares of the company. Please refer to the S&P U.S. Indices Methodology document on our website for further details.

MSCI provides investment decision support tools for clients to manage their investment processes. Headquartered in New York, NY, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Financial Exchanges & Data Sub-Industry index.

Lumentum Holdings manufactures and sells optical and photonic products. Headquartered in Milpitas, CA, the company will be added to the S&P MidCap 400 GICS Communications Equipment Sub-Industry index.

C&J Energy Services provides well construction, well completion, and other complementary oilfield services to oil and gas exploration and production companies. Headquartered in Houston, TX, the company will be added to the S&P SmallCap 600 GICS Oil & Gas Equipment & Services Sub-Industry index.

Following is a summary of the changes:

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