At the closing bell, DCI is up about 1.2%, while XYL is up about 0.6% on the day Thursday.

FORBES: Donaldson Co. Moves Up In Market Cap Rank, Passing Xylem

At the closing bell, STZ is up about 1%, while XYL is up about 0.3% on the day Friday.

FORBES: Connect

Xylem Inc (XYL) reports its fourth quarter earnings on Thursday, February 7, 2013.

FORBES: Earnings Preview: Xylem Inc

According to the ETF Finder at ETF Channel, DCI and XYL collectively make up 4.66% of the Cleantech Portfolio ETF (PZD) which is higher by about 0.8% on the day Thursday.

FORBES: Donaldson Co. Moves Up In Market Cap Rank, Passing Xylem