ULS Technology PLC (LON:ULS) saw its shares slide 7.9% to 145p in lunchtime trading after its chief executive (CEO) was appointed managing director of Mortgage Advice Bureau PLC (LON:MAB1).
The AIM-listed media agency said following the departure of Ben Thompson as CEO, managing director Stephen Goodall would be taking over the position.
Thompson previously held senior positions at Legal & General Group PLC (LON:LGEN) where he ran their market-leading mortgage distribution business, as well as the banking division.
Shares in Mortgage Advice Bureau were down 1.2% at 610p.
Meanwhile, shares in WPP PLC (LON:WPP) fell 1.8% to 1,097p as it appointed an independent counsel to investigate a claim of personal misconduct against its chief executive Sir Martin Sorrell.
The advertiser confirmed allegations that were first reported by The Wall Street Journal on Tuesday.
Elsewhere, online clothing retailer Boohoo.com PLC (LON:BOO) shares dropped 2.3% to 144p after RBC has slashed its target price to 125p from 160p, saying it does not think current levels of growth are sustainable.
In a note to clients, the Canadian bank said: "We do not think Boohoo's customer proposition is competitive enough to sustain higher levels of growth, not least without significant investment."
Oilex Ltd (LON:OEX) shares edged higher on Wednesday after the company told investors that India's Ministry of Petroleum and Natural Gas approved a proposal to extend the Cambay and Bhandut production sharing contracts for ten years.
Image Scan Holdings Plc (LON:IGE) shares advanced, gaining 8.3% to 6.23p, told investors that it has agreed terms for a previously announced cancellation of an order for portable security x-rays and said it has arranged the resale of all the units.
It also updated on its sales performance in the first half of its financial year.
Shares in Internet of Things investor Tern PLC (LON:TERN) climbed 22% as its investee Device Authority has entered into a new partnership, with Gemalto, with a view to developing products and services for enterprise.
It is hard to look past India-based power firm Mytrah Energy Plc (LON:MYT) for the morning's stand-out market mover - as a buy-out move sent the share up 60% to trade at 43.9p.
Mytrah chairman Ravi Kailas, who already owns 57.9%, is set to take the Indian wind power group private with a cash bid of 45p per share.
Elsewhere, Topps Tiles Plc (LON:TPT) was down 9% changing hands at 73.26p after it reported a 2.2% drop in second quarter like-for-like sales, blaming a tough UK retail market. The tiles retailer said while it had a strong first quarter with like-for-like sales up 3.4%, trading slowed in the second quarter.
Collagen Solutions PLC (LON:COS), meanwhile, shed 17.23% to 2.69p following results that revealed delays in getting a contract with a new customer finalised have hit revenues at the implant and tissue supply group.
Mytrah Energy Limited's (LON:MEL) chairman Ravi Kailas is set to take the Indian wind power group private with a cash bid of 45p per share. Kailas' vehicle Raksha Energy already owns 57.9% of the shares and the offer, pitched at a 64% premium to the price yesterday, is being recommended by Mytrah's independent directors.
Caledonia Mining Corporation PLC (LON:CMCL) (TSX:CAL) has predicted a material boost to earnings this year due to changes in Zimbabwe's export credit rules. The Reserve Bank of Zimbabwe raised the Export Credit Incentive (ECI) paid to all gold miners to 10% from 2.5% from February.
AfriTin Mining Ltd (LON:ATM) has completed a detailed design for its flagship asset Uis Tin Mine in Namibia, targeting the V1 and V2 pegmatite bodies, previously identified as the priority to supply feed to its new intermediary processing plant.
Delays in getting a contract with a new customer finalised by the year-end have hit revenues at implant and tissue supply group Collagen Solutions PLC (LON:COS). Sales for the year to 31 March will be ?3.5mln (2017: ?3.9mln), with the lower revenues also meaning losses will be greater than expected.
IXICO Plc (LON:IXI) said it has signed an extension to an existing agreement with a top 15 global pharmaceutical company to provide advanced imagining clinical trial services. The AIM-listed brain disease researcher said the value of the contract had increased from US$1.2mln to US$1.95mln, with its duration extended from 2019 to early 2020.
MaxCyte Inc (LON:MXCT) reported strong growth in its cash and total assets in 2017 as revenues increased by 14% and gross margins remained stable. The AIM-listed global cell-based medicines and life sciences company said its revenue for the year to 31 December 2017 was US$14.0mln, up from US$12.3mln a year earlier, with gross margins unchanged at 90%.
Digital communications company Next Fifteen Communications Group Plc (LON:NFC) enjoyed another year of record revenues and earnings in 2017.
Bacanora Lithium PLC (LON:BCN) said the feasibility study for its 50%-owned Zinnwald lithium project in Germany continues on track for completion by June 2019.
Shares in Orosur Mining Inc (LON:OMI) (TSE:OMI) opened higher after the South America-focused gold producer reported new high-grade drill results from its Anz?? project.
Rose Petroleum PLC (LON:ROSE) has expanded its footprint in Utah's Paradox basin, acquiring a 75% working interest in an additional 3,320 gross acres. The package is being acquired via joint venture partner Rockies Standard Oil Company (RSOC) and, including the new acquisition, Rose noted that the partnership now addresses some 79,577 acres in the Paradox Basin.
Europa Oil & Gas Holdings PLC (LON:EOG) chief executive Hugh Mackay told investors that the explorer is looking at adding a third 'core' area, on top of its acreage offshore Ireland and its interests onshore UK. "Outside our existing portfolio, we are actively looking to add a third core area of interest and are evaluating several opportunities at various stages of development," Mackay said, in the company's interim results statement.
NQ Minerals PLC (NEX:NQMI) (OTCQB: NQMLF), the Australia-based exploration and mining company, announced that, further to the receipt of a required Queensland Environmental Authority, it has been granted a Mining Lease for its wholly-owned Sunbeam Silver Mine
United Oil & Gas Plc (LON:UOG) told investors that a seismic acquisition programme has now begun at the Tullow Oil plc (LON:TLW) operated Walton-Morant licence, offshore Jamaica. The company, in a statement, highlighted that the Polarcus Adira vessel began data acquisition work on April 3, and the acquisition programme is expected to take around 8 weeks to complete.
Taptica International Ltd (LON:TAP), the global end-to-end mobile advertising platform for advertising agencies and brands, announced that its chief executive officer, Hagai Tal, yesterday purchased 47,500 ordinary shares in the company at a price of 300p each. Following the transaction, Tal is now interested in 9,501,259 ordinary shares representing 14.1% of the total voting rights of the company.