By Liyan Chen, Ryan Mac and Brian Solomon 
 
 After claiming the record for the largest US-listed initial public offering, Alibaba Group can now say its record-breaking IPO was the biggest in the world. 
 
 On Monday, the company announced that underwriters had exercised an option to purchase additional shares at the $68 IPO price, boosting the total amount raised by Chinese e-commerce giant and its selling shareholders from $21.8 billion to $25 billion. Bankers bought an additional 48 million American depositary shares, taking the total amount of shares sold in the offering to 368 million, or about 14.9% of the company. 
 
 In raising $25 billion, Alibaba's IPO surpassed the 2010 offering from the Agricultural Bank of China, which raised $22.1 billion in it debut on the Hong Kong Stock Exchange. Alibaba was able to sell more shares due to its over-allotment, or "greenshoe," option, which allows underwriters to placate investor demand for the stock by obtaining more shares from the company at the IPO price. 
 
 Existing shareholders Alibaba Chairman Jack Ma, Vice Chairman Joseph Tsai and Yahoo provided the extra shares sold in the over-allotment. Ma sold an additional 2.7 million shares, selling a total of about 15.5 million shares in the IPO, while Tsai sold 5.2 million shares, after offloading an additional 900,000 shares in the greenshoe. 
 
 By selling in the over-allotment, Yahoo became the largest seller in Alibaba's IPO, surpassing the 123 million shares offered directly from the Hangzhou-based company. Yahoo sold an additional 18.26 million shares, offloading a total of 140.3 million shares in the IPO for more than $9.5 billion in pre-tax cash. 
 
 Alibaba began trading on Friday on the New York Stock Exchange, with shares opening up at more than 35% above the $68 IPO price. On Monday, shares have fallen below the $90 mark, down more than 4% in intraday trading. 
 
 Credit Suisse, Deutsche Bank , Goldman Sachs, J.P. Morgan , Morgan Stanley and Citigroup acted as joint book runners for the offering. 
 
 Also follow Forbes reporters on Twitter – Liyan at @Chen_Liyan, Ryan at @RMac18, and Brian at @Brian_Solomon.
– Jack Ma feels your pain—that is, if you regularly experience the pain of being extremely, insanely rich and have to endure spending all your money all the time. The Alibaba founder spoke yesterday to CNBC from Alibaba headquarters in Hangzhou, China, telling David Faber that being China's richest man is a "great pain" and that he hasn't been especially happy over the past few weeks. "People say, 'Well, Jack, rich … is good.' Yeah, it is good, but …it's a great pain because when you're [the] richest person in the world, everybody [is] surrounding you for money," he lamented. "Today when I walk on the street, people look at [me] in a different—I want people to see this is [an] entrepreneur, this is a guy who is having fun of himself, and I want to be myself." Ma added that "this month I'm not very happy—I think too much pressure," hinting that his stress may be tied to Alibaba's recent IPO, said to be the biggest IPO ever, notes Forbes. "Maybe the stock goes so up, maybe people have high expectations on you, maybe I think too much about the future and have too many things to worry about," he said to Faber. "IPO is great because ... I'm happy with the results, but … when people think too highly of you, you have the responsibility to calm down and be yourself." One of the ways he hopes to relieve this unrelenting monetary ache is by delving more into philanthropy like Bill Gates does. "Spending money is much more difficult than making money," he said. "You made a lot of money, you gotta spend it. And you cannot ... buy 10 bags and 11 houses. … You want to spend money in a business way that can really help people." (In other tech news, "Guccifer," who hacked the Bush family and others, says what he did was "right.")