March 5, 2012, 8:16 PM UTC

Duke Street has sold Deloro Stellite Group, a maker of alloy-based critical wear solutions for extreme environments, to Kennametal Inc. (NYSE: KMT). No financial terms were disclosed. www.stellite.com

Emerging Capital Partners has sold its 1.5% stake in copper extractor Anvil Mining (TSX: AVM) to MMG Malachite Ltd., a Hong Kong-based subsidiary of Minmetals Resources Ltd. No financial terms were disclosed. www.epcinvestments.com

GTCR has completed its previously-announced sale of APS Healthcare Inc., a White Plains, N.Y.–based provider of specialty healthcare solutions to Medicaid agencies, to Universal American Corp. (NYSE: UAM) for $227.5 million. The deal included up to $50 million in performance-based earnouts and $147.5 million in cash to retire APS Healthcare’s outstanding debt. www.gtcr.com

Nautic Partners is looking to sell portfolio company Agilex Flavors & Fragrances, an Upper Saddle River, N.J.-based maker of fragrances, according to Buyouts newsletter.

American International Group (NYSE: AIG) has sold its entire $500 million stake in The Blackstone Group, according to multiple press reports. AIG acquired a 7% stake in Blackstone in 1998, long before the insurance company hit turbulence or Blackstone had gone public. AIG also is seeking to sell part of its AIA Group position for around $6 billion, in an effort to repay its TARP bailout. www.aig.com

Singapore Telecommunications has agreed to acquire Amobee, a Redwood City, Calif.-based provider of mobile advertising solutions, for around $321 million. Amobee has raised around $50 million in VC funding, from firms like Accel Partners, Sequoia Capital, Globespan Capital Partners, Cisco, Vodafone and Telefonica. www.amobee.com

Cloud Sherpas, an Atlanta, GA-based Google apps consultant and reseller, has merged with GlobalOne Group LLC, a New York-based provider of cloud solutions, according to VentureWire. No financial terms were disclosed. Both companies share Columbia Capital as an investor, while Cloud sherpas also has raised funding from Syncarpha Capital, Vento Security Holdings and Hallett Capital. www.cloudsherpas.com

Pioneer Natural Resources Inc. (NYSE: PXD) has agreed to acquire Carmeuse Industrial Sands, the U.S. industrial sands unit of Belgium-based Carmeuse Holding, for around $297 million. www.pioneernrc.com

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