Facebook is preparing for one of the biggest ever US stock flotations on Friday, when it will sell off hundreds of millions of shares to the public.
The mammoth social networking site is expected to launch its initial public offering (IPO) on the Nasdaq Stock Market on Friday, and is projected to raise more than $16bn (£10bn).
With the anticipated price of the stock raised to a range of $34-$38 dollars a share (£21-£23), it is set to be the third largest US IPO in history, ahead of General Motors in 2010, according to Renaissance Capital.
It is also the most eagerly awaited IPO in years and would value Facebook overall at more than $100bn (£62.6bn).
Trading is set to begin under the ticker symbol "FB" two days after massive interest in the sale prompted the company to boost the number of shares it plans to sell.
Facebook board members Peter Thiel and James Breyer are among those selling more shares, but founder Mark Zuckerberg is not increasing the number he is selling.
Eight years after the concept of Facebook was dreamed up in a Harvard University bedroom, Zuckerberg has become one of the richest people in the US, with 55.8% voting control in the company.
Facebook said current shareholders are now offering approximately 241 million shares, up from about 157 million shares previously.
Investors such as U2 frontman Bono stand to make huge sums, with music magazine NME predicting the singer will become the richest rock star on the planet when the company floats.
However, a recent Bloomberg survey of 1,250 global investors, analysts and traders, 79% said Facebook's valuation was not justified, with only 7% deeming the valuation fair.
The site's revenue last year was $3.7bn, up from $153m in 2007, with the majority earned through advertising.
Facebook has more than 900 million users who log in at least once a month, but it makes only a few dollars per year from each one, chiefly through advertising.
Queen Elizabeth II and Prince Philip, Duke of Edinburgh take a ride on the Yellow Duck and amphibious vehicle during a visit to Merseyside Maritime Museum on May 17, 2012 in Liverpool, England. (Photo by Jeff J Mitchell/Getty Images)
A boy looks through a gap in a security fence surrounding a seating area being built near Buckingham Palace for the Diamond Jubilee weekend on May 17, 2012 in London, England. (Photo by Peter Macdiarmid/Getty Images
Activists wrangle with riot police as they take part in the Blockupy protests on May 17, 2012 in Frankfurt, Germany. (Photo by Carsten Koall/Getty Images)
Sri Lankan military officers march during military parade rehearsals in preparation for the celebration of the third anniversary of the end of the civil war and the defeat of the separatist Tamil Tiger rebels on May 17, 2012 in Colombo, Sri Lanka. (Photo by Buddhika Weerasinghe/Getty Images)
A woman stands next to an art installation displayed at the Hong Kong International Art Fair in Hong Kong. AFP PHOTO / Philippe Lopez/AFP/Getty Images
Malang, a one month old female Javan langur is cradled by it's mother Untala, as she makes her public debut at Howletts Wild Animal Park, near Canterbury, Kent. Photo credit: Gareth Fuller/PA
A mixed-media piece by Cuban artist Eddy Garaicoa of the Mona Lisa wearing a black beret, holding Cuba's national flag and a cigar, is on display at the Center for the Development of Visual Arts, as part of the 11th Havana Biennial group exhibition "The Hunt for Success" in Havana, Cuba, Wednesday, May 16, 2012. (AP Photo/Franklin Reyes)
Novak Djokovic of Serbia smashes his racquet in frustration after losing the first set against Juan Monaco of Argentina during day six of the Internazionali BNL d'Italia 2012 Tennis on May 17, 2012 in Rome, Italy. (Photo by Julian Finney/Getty Images)
Boy George arrives at the 57TH Ivor Novello Awards at Grosvenor house. Photo: WENN
Jury member Bruce Willis attends the Opening Ceremony during the 65th Annual Cannes Film Festival at Palais des Festivals on May 16, 2012 in Cannes, France. (Photo by Pascal Le Segretain/Getty Images)
Nicole Scherzinger attends the premiere for Men In Black 3 at Odeon Leicester Square on May 16, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)
Student activists protest near the US embassy in Manila on May 17, 2012. A US navy attack submarine the USS North Carolina has docked in a Philippine port close to the disputed Scarborough shoal where Philippine and Chinese ships are locked in a standoff, a spokesman for Manila's navy said on May 15, 2012. The protesters are calling on the US to keep away from the disputed shoal and to stop meddling in Philippine affairs. AFP PHOTO / Jay DIRECTO (Photo credit should read JAY DIRECTO/AFP/GettyImages)
A Magellanic penguin swims in the June Keyes Penguin Habitat exhibit at The Aquarium of the Pacific in Long Beach, Calif., Wednesday, May 16, 2012. (AP Photo/The Orange County Register, Mark Rightmire) MAGS OUT; LOS ANGELES TIMES OUT
James Anderson of England unsuccessfully appeals for the wicket of Adrian Barath of West Indies during the day one of the first Test match between England and West Indies at Lord's Cricket Ground on May 17, 2012 in London, England. (Photo by Gareth Copley/Getty Images)
An sculpture cast from the body of British artist Antony Gormley can be seen atop a building in downtown Sao Paulo, Brazil, on May 16, 2012. The public exhibition titled "Event Horizon' uses 31 rooftops as a part of Gormley's exhibition at Centro Cultural Banco do Brasil. According to the organizers, when the exhibition began, many people confused the sculptures with potential suicides and reported them to authorities. TOPSHOTS AFP PHOTO/YASUYOSHI CHIBAYASUYOSHI CHIBA/AFP/GettyImages
A group of youths play a game of four square to pass the time while camping overnite for the grand opening of a Chick-fil-A in Knoxville, Tenn. on Wednesday, May 16, 2012. More than 180 people arrived early this morning in hope of being one of the first 100 customers who will win a year of combo meals from the popular fast food eatery. (AP Photo/The Knoxville News Sentinel, Saul Young)
Thailand Daily Life -White a 3-year-old poodle, looks at visitors touring a pet fair in Bangkok (AP Photo/Sakchai Lalit)
A woman views Lightness of Being by Chris Levine 2007 during the press preview of The Queen: Art and Image at the National Portrait Gallery, The exhibition includes formal painted portraits, press images and works by contemporary artists exploring the evolution of the Queen's image throughout her 60 year reign (Anthony Devlin/PA Wire)