Commonwealth Biotechnologies

Ticker: CBTE

Friday's close: $5.46

Week's change: +20%

Commonwealth Biotechnologies posted big gains last week after it signed a distribution deal with scientific equipment seller Fisher Scientific. The Richmond firm, which provides biotechnology research and development services, disclosed the deal in a filing with the Securities and Exchange and said it would follow with details soon.

Spherix

Ticker: SPEX

Friday's close: $4.01

Week's change: -6%

Spherix lost its chief executive last week. Thomas W. Gantt resigned from the Beltsville biotechnology firm after less than a year on the job after its board of directors spurned his plan to focus the company on offering information services.

US Airways Group

Ticker: UAIR

Friday's close: $2.35

Week's change: +27%

The pilots union at US Airways Group continued labor negotiations last week and said it may reach a deal soon to help the beleaguered airline avoid filing for bankruptcy protection for the second time. The airline also named James P. Schear its vice president of restructuring.

Performance

Food Group

Ticker: PFGC

Friday's close: $21.90

Week's change: -9%

Management changes at Performance Food Group did not sit well with investors. Tom Lovelace stepped down as chairman of the company's fresh-cut produce division, which sells packaged salads. The unit represented 17 percent of Performance Food Group's revenue in 2003.