Shares in education firm Malvern International PLC (LON:MLVN) leapt up 14.9% to 3.8p in late-afternoon trading after it said it expected to become profitable in 2018 after losses narrowed on higher revenue.
In its result for 2017, the group saw pretax losses narrow to ?706,712 from ?1.3mln the year prior on revenues of ?4.08mln, up from ?4.04mln the year before.
Profit performance was helped by a fall in the cost of sales to ?1.9mln from ?2.2mln the year prior.
In other news, Paddy Power Betfair plc (LON:PPB) shares rose 1.2% to 7,090p as city broker Numis upgraded the FTSE-100 listed bookmaker to 'add' from 'hold'.
In a note to clients, Numis analysts said the UK online gambling market remains attractive for global online players but international diversification and scale remains equally important.
Therefore, the analysts turned more positive on Paddy Power Betfair following the company's recent share price weakness.
Marketing and PR group Porta Communications PLC (LON:PTCM) shares jumped 44% to 3.25p as it said it had restructured around its Redleaf and Newgate Australia businesses.
Emma Kane will become chief executive of Redleaf Communications, which will be combined with the UK arm of Newgate.
Brian Tyson, managing partner of Newgate Australia, will run the international network that includes offices in Europe, Australia, China, Singapore, Hong Kong and the Middle East.
Air Partner PLC (LON:AIR) saw its shares fall 5.6% to 100p in late-morning trading as it appointed an interim chief financial officer (CFO) while continuing to search for a permanent replacement.
The situation is a continuation of the fallout following the resignation of former CFO Neil Morris in mid-April after the aircraft charter company discovered an accounting error following internal investigations related to customer receivable collection since between 2011 and January.
His interim replacement, Chris Mann, previously worked in a number of senior level finance positions at firms including Kone Corp and Gatwick Airport Ltd.
Elsewhere, Brewin Dolphin Holdings PLC (LON:BRW) shares dropped 1.7% to 357p as it announced the surprise departure of its finance director Andrew Westenberger, who will leave the asset manager by mutual agreement next month.
In a statement, the FTSE 250-listed firm said Westenberger will leave on May 16, when the firm will also publish its half-year results.
Meanwhile, oiler Faroe Petroleum plc (LON:FPM) shares rose 2.8% to 132p after it revealed an uplift in production as a result of the Tambar field, where two new infill wells have been added.
At the same time, the company highlighted that a sidetrack well is now being drilled at the Fogelberg project ahead of a planned Drill Stem Test (DST) to test reservoir productivity.
Scientific Digital Imaging PLC (LON:SDI) saw its shares rise 7% to 38p in early trading after it expected full-year pre-tax profits to be "moderately ahead" of previous expectations.
The AIM-listed scientific product maker said it also expected to report significant revenue growth against the previous year, with its gross margins also expected to be ahead of 2017 figures.
Meanwhile, shares in Sunrise Resources Plc (LON:SRES) surged 50% to 0.2p after it said it had signed a non-binding memorandum of understanding (MOU) that will pave the way for the first sales of perlite from its CS Pozzolan-Perlite project in Nevada, USA.
The AIM-listed miner said that under the terms of the MOU the parties would negotiate a purchase and sales agreement to sell/buy a minimum quantity of raw perlite over a specified period.
In the FTSE 250, IT infrastructure provider Computacenter PLC (LON:CCC) shares were up 2.2% at 1,254p as it said its first quarter performance had been "better than expected", driven by strong growth in supply chain revenues.
The group said in a trading update that revenue in constant currency for the first quarter increased 21%, while its supply chain revenue grew 31%.
The firm said its revenue performance was boosted by a ?34.1mln one-off software license sale in the UK which whilst profitable had also diluted its margins.
In the fallers, energy company Flowgroup PLC (LON:FLOW) shares dropped 20.4% to 0.02p after on of its largest shareholder said it would vote against the sale of its subsidiary to Co-Operative Energy Limited.
Palm Global Small Cap Master Fund, which holds a 16.68% stake in Flowgroup, said it would vote against the sale of Flow Energy Limited to the Co-op Energy group, instead throwing its support behind a sale to OVO Energy Ltd.
Sunrise Resources Plc (LON:SRES) said it has signed a non-binding memorandum of understanding (MOU) that will pave the way for the first sales of perlite from its CS Pozzolan-Perlite project in Nevada, USA.
Feedback plc (LON:FDBK) has announced that its subsidiary company, Feedback Medical Limited, has signed a two-year agreement with Royal Papworth Hospital NHS Foundation Trust to support and maintain its Cadran picture archiving communication system (PACS), which provides decision support for scan analysis..
Highlands Natural Resources Plc (LON:HNR) told investors that drilling has restarted for the East Denver shale project, with the spudding of the third well. Last week, the company agreed a funding deal with True Oil which sees the costs of at least six new wells being covered by Highland's partner.
A strong performance in the UK lifted tech recruitment specialist Harvey Nash PLC's (LON:HVN) revenues to record levels. Albert Ellis, chief executive, described the performance in the UK as outstanding in view of the uncertainty sparked by Brexit.
Bushveld Minerals Limited (LON:BMN) has said it is pleased with the 'strong performance' at its Vametco vanadium operation during the first quarter of 2018, as the first phase of the expansion project was completed. Big Pic in November.
SDX Energy Inc (LON:SDX) has told investors that it has begun drilling the LMS-1 exploration well on the Lalla Mimouna permit, onshore Morocco. It is the final well in the group's current campaign in Morocco, and the well is expected to take 15 to 20 days to drill.