By Dan Primack
May 16, 2013

American Capital has agreed to sell Global Conference Partners, a Glendale, Calif.–based provider of teleconferencing services, to Toronto-based Iotum. No financial terms were disclosed.www.calliflower.com

Mellanox Technologies Ltd. (Nasdaq: MLNX) has agreed to acquire Kotura Inc., a Monterey Park, Calif.-based silicon photonics company, for approximately $90 million. Kotura was advised by Mooreland Partners, and has raised around $27 million in VC funding from GF Private Equity, ComVentures, ARCH Venture Partners, Viterbi group and Rockley Ventures. www.kotura.com

Snap-on Inc. (NYSE: SNA) has acquired Challenger Lifts Inc., a Louisville, Ky.–based provider of vehicle lifts and lift accessories, from a private equity fund managed by Gen Cap America Inc. No financial terms were disclosed. Challenger Lifts was advised by Brookwood Associates.www.challengerlifts.com

Jana Partners reported that it now holds a 3.3% stake in Groupon (Nasdaq: GRPN) and a 4.3% stake in Zynga (Nasdaq: ZNGA). This makes Jana a top-six shareholder in both companies.www.janapartners.com

Roche Holding (SWX: ROG) is considering a sale of its blood glucose monitors business, according to Reuters. Bayer AG last year tried to sell a similar business for around $1.5 billion, but pulled the deal after finding insufficient interest. www.roche.com

Tesla Motors
 (Nasdaq: TSLA) announced plans to offer around $830 million worth of new shares and convertible senior notes (5-year coupon), with company founder and CEO Elon Musk to purchase $100 million of the new shares (at the offering price). www.tesla.com

Ambit Biosciences, a San Diego-based kinase drug discovery and development company, raised $65 million in its IPO. The company priced 8.1 million shares at $8 per share, compared to original plans to price 4.65 million shares at between $13 and $15 per share. It will trade on the Nasdaq under ticker symbol AMBI, while Citigroup and Leerink Swann served as co-lead underwriters. The company had raised more than $80 million in VC funding, from firms like OrbiMed Advisors (21.5% pre-IPO stake), AIsling Capital (20.6%), Apposite Healthcare (18.2%), Forward Ventures (12.9%), GIMV (9.5%), GrowthWorks (9.8%), MedImmune Ventures (13.4%) and Roche Ventures (15%).  www.ambitbio.com

Sinopec Engineering
, a Beijing-based engineering services group being spun out of China Petrochemical Corp., raised $1.8 billion in a Hong Kong IPO. It is the year’s largest Hong Kong IPO to date. www.sinopecengineering.com

The New Zealand government plans to offer upwards of 49% of state-owned power utility Meridian Energy Ltd. via a public flotation in the second half of 2013. www.meridianenergy.co.nz

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