Diversified manufacturer Tyco International Ltd. will be added to Standard & Poor's 500 index next week.

Standard & Poor's said Tyco, a Swiss company, will be listed on the S&P 500 after the close of trading on Aug. 26. Its shares will replace those of oilfield services firm Smith International Inc., which is being taken off the list because it is being acquired by rival Schlumberger Ltd.

In premarket trading, Tyco shares rose $1.77, or 4.8 percent, to $38.51 from $36.74.

The firm also said health care information technology company Allscripts-Misys Healthcare Solutions Inc. will replace genetic testing technology company Affymetrix Inc. on the S&P MidCap 400 index. Affymetrix will replace Eclipsys Corp. on the S&P SmallCap 600. Eclipsys is being taken off that list because it is being acquired by Allscripts-Misys.

The date for those index changes has yet to be been determined.