Goldman Sachs analyzed 4,481 IPOs over 25 years and concluded that these 5 attributes can make or break a newly public company

According to Goldman, the age of company isn't a "significant indicator" of three-year IPO outperformance, but younger firms typically see faster sales growth.

"The median firm founded 0-5 years before IPO reported sales growth of nearly 50% five quarters after the offering compared with 30% revenue growth for firms aged 5 to 15 years and 19% for firms older than 15 years," the firm said in a recent client note.

Tech companies over the last decade have waited historically-long to enter the public markets. Goldman said over the last two years the average tech, media, or telecommunications company has waited 13 years to go public.

For example, PagerDuty was founded in 2009 and went public earlier this year, more than a decade after it started.

Many investors have raised questions about the valuations of companies that have gone public this year.

"The most commonly raised concerns are that new firms are too expensive relative to their fundamentals and that demand for equity in new issues will diminish demand for the rest of the equity market," the firm said.

WeWork, one of the most anticipated listings of 2019, has seen its valuation come under scrutiny in recent months.

The company was last valued at $47 billion during a private fundraising round, but now the company is rumored to be seeking between a $20 billion and $30 billion valuation for its upcoming public offering.

According to Goldman, IPO's become more expensive compared the rest of the market shortly before a recession. At the height of the tech bubble in the early 2000's, IPO valuations soared past that of the median S&P 500 company.

A hallmark of this year's IPO market has been the concern about the profitability of the companies going public. High-growth, venture-backed companies like Uber and Lyft are burning through piles of cash to grow their businesses.

According to Goldman Sachs, IPO investors are intently-focused on when firms will achieve profitability.

"In the current IPO cycle, profitability in years two and three has indicated outperformance," Goldman said in the report.

The firm added: "Since 2010, IPOs with annualized sales growth above 40% from year 1 to year 3 and positive net income in year two have generated positive excess returns adn the highest likelihood of outperformance."

Sales growth has been the strongest determinant of IPO outperformance, according to Goldman Sachs.

"Since 2010, IPOs with annual sales growth greater than 20% have been more likely to outperform Russell 3000 over three years than a comparable, slower-growing IPO," the firm said.

Revenue growth usually declines quickly during the first five years after a company enters the public markets, according to Goldman. High-growth companies often sacrifice profitability to pursue growth and gain market. That growth often slows in an effort to achieve profitability.

Beyond Meat, a plant-based meat provider, has experienced massive sales growth this year and its share price has risen more than 500% in response.