Trinity Mirror (TNI) whips up a storm after 21.5%-owned Press Association sells its weather forecasting business, MeteoGroup for €190 million. PA will report a £125 million profit on disposal. Trinity will book an exceptional gain once the transaction completes. An unspecified portion of the proceeds will be given to shareholders as a special dividend. Trinity rises 7.1% to 188.75p.

After two profit warnings in 2012, investors this year lost faith in emergency power provider Aggreko (AGK). Today it surprises the market by saying that 2013 results are likely to be slightly ahead of expectations as we discuss in this news analysis article. Its share price rises 3.8% to £15.74.

Insurance broker Brightside (BRT:AIM) loses more than a fifth of its value after issuing its second profit warning since July. We look at the situation in more detail here.

Rigid plastic packaging firm RPC (RPC) pleases the market with the £103.5 million acquisitionof Maynard & Harris which boosts its footprint in the US. In response the stock advances 3.6% to 549p. We grilled the RPC management on several elements of the forward strategy - including acquisitions - in last week's magazine.

Video games translation group Keywords Studios (KWS:AIM) rises 7% to 107.5p after reassuring investors that 2013 revenue and profit will hit expectation that were downwardly-revised in September. It suffered project delays to Microsoft initially rolling out its new Xbox One console in fewer countries than previously planned, which had a knock-on effect for translation services in games for the new hardware. Read our 'Griller' interview with the management explaining this situation and its growth plans.

Sportech (SPO) makes an interesting move in California. It has got permissionto open sports bars where it can take horseracing bets. This is likely to be the first in several steps to replicate an existing sports betting venue business model that it already operates in Connecticut, as we discussed in a recent 'Griller' interview with Sportech. The shares are unmoved at 85.25p.

A double dose of digital radio good news sparks a 4.5% rally to 177.7p for embattled chip designer Imagination Technologies (IMG), thanks to deals withST Microelectronics and Frontier Silicon. The group rebounds from last week's disappointing half-year results, as Shares explained.

Driver fatigue software supplier Seeing Machines (SEE:AIM) leaps 6% to 8.75p after sealingits first distribution deal for Caterpillar vehicles with US supplier Wagner.

Argentinian shale play Andes Energia (AEN:AIM) shoots up 27% to 40p on strong volumes after featuring in the Sunday Times at the weekend. We looked at the story in more depth here.

Specialist drilling contractor Greka Drilling (GDL:AIM) gains 9.8% to 14p on news of a $65 million 100-well contractin India. We examined the group's prospects here.

Minnow defence firm Cohort (CHRT:AIM) slumps 10.7% to 187.6p as interim adjusted operating profits fall 45% year-on-year to £1.8 million. Though a weaker first half had been flagged, investors appear shocked by the scale of the softening. More positively the dividend is hiked 17% to 1.4p and the order book builds to £98.2 million.

Viral healthcare specialist Retroscreen Virology (RVG:AIM) rises 16.8% to 301.5p after postingconsensus-beating revenues for the year while hinting at improved profits in a trading update. Its £27 million turnover is being driven by rising client numbers.

Cancer specialist Scancell (SCLP:AIM) improves 4.9% to 37p on newsthat Nottingham Trent University has used its immunobody technology to unlock a protein that could create new prostate cancer vaccinations.

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Issue Date: 16 Dec 2013