Internet phone and messaging firm Skype has filed for an initial public offering in the US.

SureTrack Monitoring has switched from Plus-quoted to AIM.

An investment vehicle run by a team of influential bankers and politicians, NBNK, will begin building a banking empire when it floats on London's AIM later this month.

Masawara plans to raise $25m when it floats on AIM later this month to invest in "the recovery of Zimbabwe's economy."

Finnish ferro-chrome producer Ruukki Group has started trading on the main market of the London Stock Exchange.

DP Poland, a newly established company which has secured the master franchise for Domino's Pizza in Poland, will raise £6.5m through a placing of 13m new shares at 50p each with institutional and other investors.

Ocado has slashed the price at which shares grocery delivery group will be floated following widespread criticism of its initial flotation plans.

Digital marketing firm Fuse8 has joined AIM.

Data networks and data centre services provider MDNX plans to raise £33m as part of a flotation on AIM.

It was a lacklustre start for Agricultural Bank of China's shares on their first trading day in Shanghai.

Oil and gas explorer Fairfield Energy has postposed its planned $500 main market listing, citing difficult market conditions.

Vallar, financier Nat Rothschild's investment vehicle, beat its own target when it raised £707m in an initial public offering in London.

Online food distributor Ocado is to test the market's appetite for new issues with a float this month that could see the Waitrose partner valued at up to £1.1bn.

Scottish Resources Group, the largest surface coal mining group in the UK, plans to raise £25m when it lists on the main market of the London Stock Exchange.

DP World, one the World's largest ports group, has scrapped its plans to float in London this year.

Grocery delivery firm Ocado has confirmed that it intends to issue about £200m in shares when it presses ahead with its much anticipated flotation this year.

Vallar said it plans to raise £600m when it floats on the main market of the London Stock Exchange.