NEW YORK, Oct. 7 /PRNewswire/ -- S&P will make the following changes to the S&P MidCap 400 and SmallCap 600 Indices:

• Rofin-Sinar Technologies Inc. (Nasdaq: RSTI) will replace Cogent Inc. (Nasdaq: COGT) in the S&P SmallCap 600 after the close of trading on Tuesday, October 12. Cogent is being acquired by S&P 100 & 500 constituent 3M Co. (NYSE: MMM) in a deal expected to be completed soon, pending final approvals and conditions.

• S&P SmallCap 600 constituent Dril-Quip Inc. (NYSE: DRQ) will replace Burger King Holdings Inc. (NYSE: BKC) in the S&P MidCap 400, and Atlantic Tele-Network Inc. (Nasdaq: ATNI) will replace Dril-Quip in the S&P SmallCap 600 after the close of trading on Thursday, October 14. 3G Capital is acquiring Burger King in a deal expected to be completed soon pending final approvals and conditions.

Standard & Poor's will monitor these transactions, and post any relevant updates on its website: www.standardandpoors.com.

Rofin-Sinar Technologies Inc. engages in the design, development, engineering, manufacture, and marketing of industrial lasers and supplies. Headquartered in Plymouth, MI, the company will be added to the S&P SmallCap 600 GICS (Global Industry Classification Standard) Electronic Equipment & Instruments Sub-Industry index.

Dril-Quip designs, manufactures, fabricates, inspects, assembles, tests, and markets engineered offshore drilling and production equipment. Headquartered in Houston, TX, the company will be added to the S&P MidCap 400 GICS Oil & Gas Equipment & Services Sub-Industry index.  

Atlantic Tele-Network provides telecommunications services. Headquartered in Beverly, MA, 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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SOURCE Standard & Poor's