US-based Tremor Media, which provides video advertising services, is buying peer Transpera, according to news provider TechCrunch.

BG Medicine plans to list 4.75 million shares for $7 each at its initial public offering (IPO), although investment bank Lazard can sell a further 712,500 shares if demand is strong enough. The previous price range was $13 to $15 per share.

KIT Digital makes three acquisitions including Kyte.

The Committee on Foreign Investment in the United States (CFIUS) is scrutinizing Huawei's deal for server technology firm 3Leaf, which the Chinese telecom gear maker completed in May, for US national security implications, according to newswire Reuters.

Fluidigm will offer 5.17 million common shares when it floats on the Nasdaq stock exchange at between $13.50 and $15.50 per share.

Silicon Laboratories, a Nasdaq-listed computer circuit parts maker, acquires SpectraLinear

Ligand will pay $31.2m of cash on top of the $800,000 of net cash in CyDex and a further $4.3m in 12 months time as well as undisclosed performance fees.

New York or Nasdaq could be flotation route for social network LinkedIn after it files for initial public offering

Amgen will pay $425m in cash and up to $575m in performance fees for Biovex, which is testing vaccines for cancer and genital herpes.

AcelRx will issue 6.6 million shares at up to $14 each to raise $92.9m, including 865,500 shares the investment bank Piper Jaffray can sell if demand is strong enough. After the initial public offering (IPO), AcelRx will have a market capitalisation of up to $230m based on 16.1 million shares in issuance.