Chiesi Farmaceutici SpA said that it will acquire the 42% stake it does not already hold in Cary, N.C.-based Cornerstone Therapeutics Inc. (Nasdaq: CRTX). The $9.50 per share deal is below the $9.74 per share where Cornerstone closed trading Friday, but is around a 78% premium to where Cornerstone was trading before Chiesi first expressed interest back in February. www.crtx.com

Kennametal Inc. (NYSE: KMT) has agreed to acquire the tungsten materials business of Allegheny Technologies Inc. (NYSE: ATI) for $605 million. www.kennametal.com

Lighting Science Group (OTC BB: LSCG), a Satellite Beach, Fla.–based LED lighting company, has sold $20 million in preferred stock to existing shareholders Pegasus Capital Advisors andRiverwood Capital Partners. www.lscg.com

Packaging Corp. of America (NYSE: PKG) has agreed to acquire Boise Inc. (NYSE: BZ) for nearly $2 billion in cash. The $12.55 per share deal represents a 26% premium to Friday’s closing price for Boise stock. www.packagingcorp.com

PKN Orlen, Poland’s largest oil refiner, has agreed to acquire Canada’s TriOil Resources (TSX: TOL) for approximately US$177 million. www.trioilresources.com

RingCentral, a San Mateo, Calif.-based provider of cloud business phone systems and services, has set its IPO terms to 7.5 million shares being offered at between $11 and $13 per share. It plans to trade on the NYSE under ticker symbol RNG, with Goldman Sachs, J.P. Morgan and BoA Merrill Lynch serving as lead underwriters. The company reports a $24 million net loss on $73 million in revenue for the first six months of 2013, compared to a $19 million net loss on $52 million in revenue for the year-earlier period. RingCentral has raised around $55 million in private funding from Sequoia Capital (17.2% pre-IPO stake), Khosla Ventures (16.7%), DAG Ventures (7.7%), Scale Venture Partners, Cisco and Silicon Valley Bank. www.ringcentral.com
Violin Memory, a Mountain View, Calif.-based flash storage company, has set its IPO terms to 18 million shares being offered at between $8 and $10 per share. It would have an initial market cap of approximately $736 million, were it to price in the middle of its range. The company plans to trade on the NYSE under ticker symbol VMEM, with J.P. Morgan, Deutsche Bank and BoA Merrill Lynch serving as lead underwriters. Violin reports a $59 million net loss on $51 million in revenue for the first half of 2013, compared to a $49 million net loss on $30 million in revenue for the year-earlier period. The company raised $50 million in VC funding this past March at a valuation north of $800 million. Backers include SAP Ventures, Highland Capital Partners, Toshiba and Juniper Networks. www.violin-memory.com

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