RESTON, Va. ( TheStreet) -- The small-cap Russell 2000 Index has climbed 4.1% in the past three months, and the S&P 500 Index of the biggest stocks has risen 5.8%. In the same period, TheStreet.com has recommended several investments that have bested those returns in our "Under the Radar" series. Here are the top-five performing recommendations of the past three months. 1. Carbo Ceramics: ( CRR) After its recommendation on Oct. 23, Carbo Ceramics has gained 33%. 2. Atheros Communications: ( ATHR) After its recommendation on Nov. 24, Atheros has gained 27%. 3. AsiaInfo Holdings: ( ASIA) Since being recommended on Nov. 6, AsiaInfo has gained 24%. 4. China Automotive Systems: ( CAAS) After its recommendation on Dec. 29, China Automotive has jumped 19%. (That's an annualized gain of 5,283%.) 5. National Presto: ( NPK) After its recommendation on Dec. 9, National Presto has risen 18%.