March 12, 2012, 6:02 PM UTC

Asahi Kasei Corp. (Tokyo: 3407) has agreed to acquire Zoll Medical Corp. (Nasdaq: ZOLL), a Chelmsford, Mass.–based maker of resuscitation and critical care devices and related software solutions, for approximately $2.21 billion. The $93 per share deal represents a 23.8% premium over Friday’s closing price. www.zoll.com

Glencore International has made a $5.5 billion takeover approach for Canadian grain handling companyViterra (TSX: VT), according to the Sunday Telegraph. Cargill also is considering a bid, according to the WSJ. www.viterra.com

Molycorp Inc. (NYSE: MCP) has agreed to acquire Canadian rare earth mining company Neo Material Technologies Inc. (TSX: NEM), for approximately C$1.3 billion in cash and stock. The C$11.30 per share price represents around a 42% premium to Thursday’s closing price. www.molycorp.com

Wal-Mart Stores (NYSE: WMT) has acquired Social Calendar, a Facebook app that provides birthday and holiday reminders, according to TechCrunch. No financial terms were disclosed. www.walmart.com

Youku Inc. (Nasdaq: YOKU) has agreed to merge with fellow Chinese video sharing company Tudou Holdings Ltd. (Nasdaq: TUDO), an an all-stick deal valued at over $1 billion.

TPG Capital has hired Bank of America to help it sell hospital operator Iasis Healthcare Corp., according to Bloomberg. The reported asking price is $2.4 billion.

Research in Motion has acquired Paratek Microwave Inc., a Columbia, Md.-based provider of adaptive RF front-end component solutions for mobile wireless applications. No financial terms were disclosed. Paratek had raised over $138 million in VC funding since 1999, from firms like RIM, Polaris Venture Partners, Novak Biddle Venture Partners, Morgenthaler, Investor AB, STMicroelectronics and ABS Ventures. www.rim.com

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