Hewlett-Packard chief executive Meg Whitman is the technology sector's wealthiest woman with a $1.3 billion fortune, according to new rankings by Wealth-X.
Stock holdings from their respective companies make up the bulk of fortunes for most women on the list.
For 58-year old Whitman, it was the profits from the sale of her eBay shares back in 2007, Wealth-X notes. Whitman was CEO at the e-commerce firm from 1998 until 2008.
Meanwhile, Sandberg has been selling Facebook shares since 2012, generating more than $700 million in cash before taxes. She still holds around $430 million in Facebook stock, Wealth-X estimates. Facebook currently trades at $83.52 per share.
Alibaba's Lucy Peng, or Peng Lei, became a billionaire after the Chinese e-commerce giant was valued at $167 billion ahead of its historic initial public offering last year. Alibaba's market cap now stands around $210 billion following an 18 percent slide in shares year-to-date.
Taiwanese native Cher Wang, who assumed the title of CEO at HTC last month, is a regular name on global rich lists, but HTC's weak performance in recent years has significantly reduced her wealth. The net worth of Wang and her husband dropped $950 million in 2014 following a 50 percent drop in HTC's stock price, Forbes reported last year.
However, the net worth of these five women still lags far behind their male peers.
Microsoft founder Bill Gates was named tech's richest man by Forbes last month with a staggering net worth of $79.2 billion. Larry Ellison, former Oracle CEO and number two on the list, boasts $54.3 billion.
Despite years of progress in bridging the global gender gap, massive pay disparities still exist.
Only 5 percent of Fortune 500 chief executive officers are women and their salaries consistently rank lower than men, statistics show.
A March study from the Federal Reserve Bank of New York reveals that performance-based wages are skewed to benefit men: "The compensation of female executives is more exposed to declines in firm value and less exposed to increases in firm value than that of males."
For example, a $1 million increase in firm value generates a $17,150 increase in firm-specific wealth for male executives and a $1,670 increase for females, the study said.
The World Economic Forum estimates it will take about 81 years for gender parity in the workplace.