Renewable energy investment firm KleenAir Systems saw revenues fall in the last year but cut its losses as it got a handle on overheads.
Revenue for the year to the end of June fell to £26,446, from £35,047 in 2011.
Pre-tax losses were £134,949, pared back from £163,353 the previous year.
That equated to losses per share of 0.221p, an improvement on the 0.357p loss before.
"Since KleenAir's interim results, the board has been primarily focused on ensuring the business reduced its overheads and continued to implement its investing policy in order to generate returns to shareholders," it said.
Redhall Group, the specialist engineering support services firm, said that after a testing year the worst was behind it.
The Yorkshire-based company has been hit by a number of contract issues, including an expensive legal battle with Vivergo over a biofuels plant.
Underlying revenue for the year ended 30th September was down 5.6% to £119.5m was 5.6%, while pre-tax profits plunged 50.3% to £1.9m.
Diluted earnings per share stood were down 49% to 4.8p.
The firm posted exceptional items in the year of £5.9m, the majority of which related to costs on the Vivergo legal dispute of £2.5m and provisions on legacy contracts of £2.6m.
The company does not anticipate that any further provisions will be needed in future for these legacy contracts.
Chairman David Jackson said the prospects for the next 12 months looked encouraging, with strength in the oil and gas market and opportunities afforded by the Crossrail project in London where the firm is a specified supplier.
"The opportunities for our manufacturing business in particular look outstanding over the next three years," he added.
Sports nutrition company Provexis said it narrowed losses during the first half of its financial year and believes it is poised to make further progress.
Underlying operating losses narrowed to £0.51m for the six months ended September 30th 2012 compared to a loss of £1.03m a year earlier. Revenues for the period increased to £3.26m from £1.53m previously.
Provexis, which develops, licenses and markets scientifically-proven functional food and sports nutrition technologies, said cash balance at the end of September was £1.4m compared to £2.8m in 2011.
Stephen Moon, Chief Executive Officer commented: "We are very pleased with the progress made with our Science in Sport business, which has continued to grow despite some very tough trading conditions across the sector, including the effect of the extremely poor weather in June and July."
"With broadened distribution, margin improvements feeding into increased marketing and sales investment, and a healthy innovation pipeline, we are confident of continued progress in the second half," he added.
Meanwhile Fruitflow continues to make progress, with nine regional consumer products now on the market around the globe and more to follow in the second half of the year, the group explained.
"With a commercially viable tablet grade format now complete, we have reached a major milestone, as this gives us access to the dietary supplement sector. We continue to work very closely with DSM on developing further consumer understanding of Fruitflow and in regulatory matters," Moon said.
Provexis said it is now seeing significantly reduced operating losses after its restructuring programme and it continues to seek further cost savings and efficiency improvements.
"The economic climate remains very challenging, but with our continued commitment to focusing on the twin revenue streams of SiS and Fruitflow, while managing costs carefully, we believe the business is well placed to make further progress."