“I don’t think you will find any Twitter IPO parties in San Francisco,” says one investor. “It’s just not that kind of culture.”

On Wednesday, Twitter raised $1.82 billion, pricing 70 million shares at $26 each. At that price, the company has a market capitalization of nearly $14.2 billion — up from the $13.9 billion estimated earlier this week after the company increased its share-price range based on strong demand.

But the social network, now headquartered on Market St. in San Francisco’s Tenderloin district, won’t be completely devoid of celebration. According to a source close to Twitter, the company opened its doors at 5 a.m. so employees who wanted to watch the opening bell from the offices could do so. The business day will continue until 5 p.m., when Twitter plans to host an extended happy hour, dubbed “Tea Time.” And while there won’t be an official big bash, former Twitter Director of Platform Ryan Sarver, now a Redpoint Ventures partner, is also expected to open his bar Tradition that evening for festive employees.

Indeed, the understated approach seems to follow the philosophy of co-founder Jack Dorsey, who is said by some former employees to follow a “back-to-work” approach regardless of company milestones. It could also serve Twitter well if the company’s Wall Street debut proves a rocky one. And the company is currently unprofitable, reporting a $133 million net loss on $422 million in revenues through the first nine months of 2013.

In other words? There’s clearly much more work to be done.