Monday After-Hours Movers: Five9, Stifel Trending Up

Five9 Inc FIVN +8% - Released Q4 EPS, FY15 EPS outlook.

SunPower Corporation SPWR +13% - Announced Joint Venture plans with First Solar.

Chegg Inc CHGG +4% - Reported Q4 EPS, FY15 sales guidance.

First Solar, Inc. FSLR +11% - Announced  potential JV with SunPower.

Stifel Financial Corp SF +1.7% - Announced Q4 EPS, acquisition of Sterne Agee for ~$150 million.

Depomed Inc DEPO +5% - Released Q4 EPS.

PDL BioPharma Inc PDLI -6% - Reported Q4 EPS.

DealerTrack Technologies Inc TRAK -5% - Reported Q4 EPS, FY15 EPS guidance.

AXT Inc AXTI -4.5% - Announced Q4 EPS, investigation of Davis Zhang, President of China operations.

Xencor Inc XNCR -4% - Announced 5.5 million share public offering.