NEW YORK, June 24, 2019 /PRNewswire/ -- S&P Dow Jones Indices will make the following changes to the S&P 500, S&P MidCap 400 and S&P SmallCap 600:  

• S&P MidCap 400 constituent MarketAxess Holdings Inc. (NASD: MKTX) will replace L3 Technologies Inc. (NYSE: LLL) in the S&P 500, S&P SmallCap 600 constituent Axon Enterprise Inc. (NASD: AAXN) will replace MarketAxess Holdings in the S&P MidCap 400, and Mesa Laboratories Inc. (NASD: MLAB) will replace Axon Enterprise in the S&P SmallCap 600 effective prior to the open of trading on Monday, July 1. S&P 500 constituent Harris Corp. (NYSE: HRS) is acquiring L3 Technologies in a deal expected to be completed on or about that date pending final approvals.
• USANA Health Sciences Inc. (NYSE: USNA) will replace Fidelity Southern Corp. (NASD: LION) in the S&P SmallCap 600 effective prior to the open of trading on Monday, July 1. S&P SmallCap 600 constituent Ameris Bancorp (NASD: ABCB) is acquiring Fidelity Southern in a deal expected to be completed on or about that date pending final conditions.
• Xencor Inc. (NASD: XNCR) will replace HFF Inc. (NYSE: HF) in the S&P SmallCap 600 effective prior to the open of trading on Tuesday, July 2. S&P MidCap 400 constituent Jones Lang LaSalle Inc. (NYSE: JLL) is acquiring HFF in a deal expected to be completed on or about that date pending final approvals.

MarketAxess Holdings operates an electronic trading platform that enables fixed-income market participants to trade corporate bonds and other types of fixed-income instruments. 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.

Axon Enterprise develops, manufactures, and sells conducted energy weapons. Headquartered in Scottsdale, AZ, the company will be added to the S&P MidCap 400 GICS Aerospace & Defense Sub-Industry index.

Mesa Laboratories designs, manufactures, and markets quality control instruments and disposable products. Headquartered in Lakewood, CO, the company will be added to the S&P SmallCap 600 GICS Health Care Equipment Sub-Industry index.

USANA Health Sciences develops, manufactures, and sells science-based nutritional and personal care products. Headquartered in Salt Lake City, UT, the company will be added to the S&P SmallCap 600 GICS Personal Products Sub-Industry index.

Xencor focuses on the discovery and development of engineered monoclonal antibody and other protein therapeutics. Headquartered in Monrovia, CA, the company will be added to the S&P SmallCap 600 GICS Biotechnology Sub-Industry index.

Following is a summary of the changes:

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