Bilfinger (DB: GBF) of Germany has agreed to acquire Johnson Screens, a New Brighton, Minn.-based maker of industrial filters and water well screens, from Weatherford International Ltd. (NYSE: WFT) for nearly €100 million. www.johnsonscreens.com

Lexmark International Inc. (NYSE: LXK) has acquired Acuo Technologies, a Bloomington, Minn.–based provider of software and services for clinical content management, data migration and vendor neutral archives. The deal was valued at approximately $45 million in cash. www.acuotech.com

Stryker Corp. (NYSE: SYK) has agreed to acquire Trauson Holdings Company Ltd. (HK) 0325), a Chinese maker of devices for spine trauma surgeries. The deal is valued at approximately US$764 million, or HK$7.50 per share. www.stryker.com

BAA has received three bids for Stansted Airport, Britain’s fourth-largest airport, according to multiple press reports. The deal could be worth more than £1 billion, with suitors including Macquarie Group, Malaysia Airports Holdings and Manchester Airports Group. TPG Capital also had expressed interest, but did not submit a bid. www.stanstedairport.com

ArcelorMittal SA and Brazil’s Cia. Siderúrgica Nacional SA are the frontrunners for steel mills being sold by Germany’s ThyssenKrupp AG, according to Reuters. ArcelorMittal is offering $1.5 billion for a plant in Alabama, while CSN is offering $3.8 billion for both the Alabama facility and a majority stake in a Brazilian mill. www.thyssenkrupp.com

Aurora Capital Group has hired Goldman Sachs to run an auction for NuCO2 Inc., a Stuart, Fla.-based provider of bulk CO2 products and services to the U.S. fountain beverage industry, according to Reuters. The deal could be worth more than $1 billion. Aurora took NoCO2 private in May 2008 for approximately $487 million. www.nuco2.com

Aviva PLC (LSE: AV) and CIMB have agreed to sell a 98% stake in their Malaysian insurance joint venture to Sun Life Financial (TSX: SLF) and Malaysian sovereign wealth fund Khazanah for approximately US$594 million. www.sunlife.com

AT&T (NYSE: T) is “considering buying a counterpart in Europe,” according to The Wall Street Journal. www.att.com

Goldman Sachs said during its earnings call that it will explore a sale of a majority stake in its reinsurance business, which generated just nearly $1.1 billion of revenue last year. www.goldmansachs.com

American Capital has sold Lifoam Holdings Inc., a Hunt Valley, Md.–based maker of EPS Foam shippers for various industries, to Jarden Corp. (NYSE: JAH). American Capital reports that it booked a $14 million gain on its original investment, after receiving $60 million in debt and equity proceeds. www.lifoam.com

Hewlett-Packard (NYSE: HPQ) recently received inbound interest in both its Autonomy and Electronic Data Systems units, according to multiple press reports. HP said in a recent filing that it would consider selling businesses that “that may no longer help us meet our objectives.” www.hp.com

Sign up for Dan’s daily email newsletter on deals and deal-makers: GetTermSheet.com