UK small caps close up 0.8 percent, outperforming the mid-caps and the blue chips, which gain 0.6 and 0.7 percent, respectively.
Shares in Fusionex International rise 3.9 percent as the enterprise software firm reports an 18 percent increase in its gross profit for the six months to March.
"Fusionex delivers a better-than-expected set of maiden interim results," Panmure says in a note, raising its target for the group to 344 pence from 336 pence and keeping a "buy" stance on the stock.
Eco City Vehicles, the developer and supplier of the London licensed Mercedes Vito taxi, add 3.6 percent after it reports a strong performance by the Vito taxi and a sharp swing to ebitda profits.
Quixant, a provider of specialised computing platforms for gaming and slot machine applications, began trading on AIM on Tuesday.
"The business is profitable and cash generative and our projected 20 percent growth rate should prove conservative if it can persuade a number of the large manufacturers to outsource," Edison (Milan: EDNR.MI - news) said in a note.
Shares in Zytronic listed fall 1.9 percent on the FTSE Alternative Investment Market (AIM) index as the touch sensors manufacturer reports a 64 percent fall in pre-tax profit.
"Zytronic's interim results this morning have confirmed the slower trading that was detailed in the trading update of May 10," analysts at N+1 Singer say in a note. "As discussed at the time, visibility had not improved and mix has been unhelpful leading to a much more subdued outlook for the remainder of the year."
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