Huntsman Corp. (NYSE: HUN) has agreed to acquire the titanium dioxide and color pigments businesses of Rockwood Holdings Inc. (NYSE: ROC), for approximately $1.1 billion. Rockwood also said that it would combine its own color pigments business with the Rockwood business, and eventually take the combined group public. www.huntsman.com
HighTail (f.k.a. YouSendIt), a Campbell, Calif.-based provider of cloud-based enterprise collaboration services, has acquired Adept Cloud, a Palo Alto, Calif.–based file-sharing startup. No financial terms were disclosed. HighTail has raised nearly $50 million in VC funding since 2005, from firms like Alloy Ventures, Cambrian Ventures, Adams Street Partners, Emergence Capital Partners, Sigma Partners and Sevin Rosen Funds. Adept Cloud had raised under $1 million in seed funding from The Entrepreneurs’ Fund. www.hightail.com
GEMS Education, a Dubai-based global K-12 schools operator, said that it is seeking to raise around $500 million via a sale of up to a 20% equity stake. www.gemseducation.com
Google (Nasdaq: GOOG) has acquired Bump Technologies, a Mountain View, Calif.-based developer of mobile apps that allow smartphones to identify each other and share information by being bumped together. No financial terms were disclosed, but various media reports suggest a price just north of $30 million. Bump had raised around $20 million in VC funding from Andreessen Horowitz, Sequoia Capital, Sherpalo Ventures and SV Angels. www.bu.mp
Sycamore Partners has acquired nearly an 8% stake in teen apparel retailer Aeropostale Inc.(NYSE: ARO), for approximately $54 million. www.aeropostale.com
Tencent Holdings (HK: 700) has acquired a 36.5% stake in the Sogou search unit of China-basedSohu.com (Nasdaq: SOHU) for $448 million. The deal also includes an option to increase the position to 40%. www.sohu.com
Essent Group Ltd., a Bermuda-based mortgage insurance company, has filed for a $287.5 million IPO. It plans to trade on the NYSE under ticker symbol ESNT, with Goldman Sachs, J.P. Morgan and Credit Suisse serving as lead underwriters.
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