11. Sheryl Sandberg — $1.6 billion
Ranking on Forbes' list of world's wealthiest: 1,396
Age: 49
Country: United States
Source of wealth: Sandberg is the chief operating officer at Facebook, and previously served as Google's vice president of global online sales and operations.
10. Zeng Fangqin — $1.6 billion
Ranking on Forbes' list of world's wealthiest: 1,389
Age: 53
Country: China
Source of wealth: Zeng is the chairwoman for Lingyi Technology, which supplies electronic components for smartphones, tablets, and laptops for major companies such as Huawei and Apple.
9. Wang Laichun — $2.0 billion
Ranking on Forbes' list of world's wealthiest: 1,161
Age: 51
Country: China
Source of wealth: Wang serves as the chairwoman of Luxshare Precision, which manufacturers electronic connectors for companies like Apple. Wang has also previously worked for Foxconn.
8. Thai Lee — $2.3 billion
Ranking on Forbes' list of world's wealthiest: 1,028
Age: 60
Country: United States
Source of wealth: Lee is the CEO of SHI International, a New Jersey-based provider of information technology (IT) products and services. The company reportedly has more than 17,000 customers, which include AT&T and Boeing.
7. Lam Wai Ying — $2.3 billion
Ranking on Forbes' list of world's wealthiest: 1,021
Age: Unknown
Country: Hong Kong
Source of wealth: Lam is the chairwoman and co-owner of Biel Crystal Manufactory, which makes touchscreen glass for iPhones and other tech products, including smartwatches and tablets.
6. Ma Dongmin ("Melissa Ma") — $2.6 billion
Ranking on Forbes' list of world's wealthiest: 861
Age: 49
Country: China
Source of wealth: Ma is married to Robin Li, who is the cofounder and CEO of Chinese search engine Baidu. Ma left the company in 2007, but joined back on in 2017 to serve as special assistant to the chairman (her husband).
5. Zhou Qunfei — $3.1 billion
Ranking on Forbes' list of world's wealthiest: 726
Age: 49
Country: Hong Kong
Source of wealth: Zhou is the founder and CEO of Lens Technology, a Chinese tech company that manufactures protective glass for touchscreens for smartphone makers like Samsung, LG, and Microsoft. She's considered the world's richest woman whose fortune is self-made.
4. Meg Whitman — $3.3 billion
Ranking on Forbes' list of world's wealthiest: 661
Age: 62
Country: United States
Source of wealth: Whitman was CEO of eBay until 2008, a 10-year stint during which the e-commerce site's annual revenue grew from a few million to $8 billion. She's served as CEO of Hewlett Packard Enterprise, and was named the CEO of short-video startup Quibi in April 2018. Whitman also serves on the board for esports organization Immortals.
3. Judy Faulkner — $3.6 billion
Ranking on Forbes' list of world's wealthiest: 592
Age: 75
Country: United States
Source of wealth: Faulkner is the founder and CEO of Epic Systems, a software company for electronic medical records. The company, founded in 1979, stores the medical information of hundreds of millions of Americans in its software.
2. Dagmar Dolby — $4.1 billion
Ranking on Forbes' list of world's wealthiest: 479
Age: 77
Country: United States
Source of wealth: Dolby is the largest shareholder of Dolby Laboratories, a producer of surround-sound systems and noise reduction technologies. She owns about 38% of the company that her late husband founded in 1965.
1. Laurene Powell Jobs — $18.5 billion
Ranking on Forbes' list of world's wealthiest: 57
Age: 55
Country: United States
Source of wealth: Jobs has significant stakes in Apple and Disney that she inherited from her late husband, Apple cofounder Steve Jobs. She founded a social impact firm in the early 2000s called Emerson Collective, which now has a majority stake in The Atlantic.