
If Groupon goes public with a valuation of $25 billion in 2011, it will be the largest IPO by a venture-backed company, according to Dow Jones VentureSource.
Chicago-based Groupon, which offers daily discounted deals at local restaurants and retail outlets, reportedly saw sales of $760 million in 2010, a big rise from the $33 million in revenue from 2009.
Whether Groupon's IPO will break records or not is yet to be seen, but some companies have.
Here is a look at top 16 non-venture-backed IPOs that have broken all records, according to Business Insider.
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Proceeds: $9.576 billion
Issue Year: 1994
Market: Japan
Company's profile: Japan Tobacco is the world's third-largest tobacco company, with a global market share of 11 per cent and market capitalisation of about $32 billion.
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Proceeds: $9.914 billion
Issue Year: 1993
Market: Japan
Company's profile: East Japan Railway is the largest passenger railway company in the world and one of the seven Japan Railways Group companies.
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Proceeds: $10.189 billion
Issue Year: 1997
Market: Australia
Company's profile: Telstra is an Australian telecommunications and information services company that provides fixed line and mobile services in addition to 3G services.
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Proceeds: $10.620 billion
Issue Year: 2000
Market: United States
Company's profile: AT&T Wireless is America's second-largest wireless telecommunications company that provides mobile and Wi-Fi services.
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Proceeds: $10.656 billion
Issue Year: 2006
Market: Russia
Company's profile: Rosneft is a petroleum company partially owned by the Russian government that is engaged in exploration and production in Russia, the Far East, Kazakhstan and Algeria.
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Proceeds: $11.159 billion
Issue Year: 2010
Market: Japan
Company's profile: Daiichi is one of Japan's top insurance companies that provides individual and group life insurance, annuities and medical coverage.
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Proceeds: $11.186 billion
Issue Year: 2006
Market: China
Company's profile: The Bank of China is one of the largest partially state-owned banks in China that offers a range of financial services to customers across the Chinese mainland, Hong Kong, Macau and 29 other countries.
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Proceeds: $12.487 billion
Issue Year: 1996
Market: Germany
Company's profile: Deutsche Telekom is a telecommunications and information technology service company with more than 200 million customers in about 50 countries.
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Proceeds: $13.745 billion
Issue Year: 1986
Market: Japan
Company's profile: NTT is a telecommunications provider in Japan that offers fixed and mobile voice and other telecommunications related services.
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Proceeds: $16.588 billion
Issue Year: 1999
Market: Italy
Company's profile: Enel is Italy's largest power company that produces, distributes and sells electricity and gas to more than 61 million customers in 40 countries.
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Proceeds: $18.051 billion
Issue Year: 1998
Market: Japan
Company's profile: In April 2000, NTT Mobile Communications Network changed its name to NTT Docomo. The company provides wireless telecommunication services to more than 56 million subscribers in Japan.
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Proceeds: $19.650 billion
Issue Year: 2008
Market: United States
Company's profile: Visa is the operator of the largest consumer payment system in the world. The company counts about 1.7 billion payment cards, credit and otherwise, in circulation.
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Proceeds: $20.500 billion
Issue Year: 2010
Market: Hong Kong
Company's profile: American International Assurance is an insurance company based in Hong Kong with offices in the Asia-Pacific region.
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Proceeds: $20.1 billion
Issue Year: 2010
Market: NYSE
Company's profile: General Motors is an American multinational auto-maker based in Detroit, Michigan, and world's second-largest automaker after Toyota.
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Proceeds: $21.969 billion
Issue Year: 2006
Market: China
Company's profile: The Industrial and Commercial Bank of China provides financial products and services to 3.61 million corporate and 216 million individual clients.
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Proceeds: $22.121 billion
Issue Year: 2010
Market: China
Company's profile: The Agricultural Bank of China is one of China's largest banks with more than 24,000 branches and about 441,000 employees.