Aiiso Yufeng Li’s net worth has not been publicly verified in 2026. He does not appear on the Forbes or Bloomberg wealth rankings, and no company filing or reliable financial publication gives a figure. He is the founder and Chief Strategy Officer of CorDx, a privately held diagnostics company, and his family has given more than $29 million to the University of California San Diego (UCSD) since 2024. Those gifts show he is financially successful, but gifts and company activity are not the same as personal wealth. This guide sets out what is confirmed, what is not, and why one online claim of “$3.5 billion” should be ignored.
Quick answer
- Net worth: not publicly verified (no reliable figure exists)
- Billionaire? No evidence. He is not on Forbes or Bloomberg lists
- Role: Founder and Chief Strategy Officer, CorDx
- Documented giving to UCSD: about $29.1 million in four gifts (2024 to 2025)
- Be careful: a $3.5 billion figure online wrongly links him to ByteDance
What Is Aiiso Yufeng Li’s Net Worth in 2026?
There is no confirmed number. CorDx is a private company, so it does not publish its revenue, profit, valuation or who owns what share. Without those details, nobody can calculate his personal fortune honestly. Any exact figure you see online is a guess.
To work out a founder’s net worth you need four things: the size of their ownership stake, the value of the company, their other assets, and their debts. None of these is public for Li. If you want to see how that maths works for any founder, our guide on the financial side of starting and running a business explains how company value and personal wealth differ.
Is Aiiso Yufeng Li a Billionaire?
There is no evidence that he is. Forbes, Bloomberg and Hurun do not list him. Being a founder and making large donations does not prove billionaire status.
Why the $3.5 Billion Claim Is Wrong
One low-quality net worth website states a figure of $3.5 billion and says he co-founded ByteDance and worked at Microsoft and Google. This is an identity mix-up. “Yufeng Li” is a very common name, and the page appears to have confused him with someone else. UCSD, CorDx and press releases all describe him as the founder of a diagnostics company, not a ByteDance founder. The page also shows no method and no direct Forbes source.
Online claims vs what can be verified
| Claim found online | Verified? | What the evidence shows |
|---|---|---|
| Net worth of $3.5 billion | No | No Forbes, Bloomberg or Hurun listing; no method shown |
| Co-founded ByteDance / TikTok | No | No credible source supports this; he is the CorDx founder |
| Worked at Microsoft and Google | No | Not found in any university or company biography |
| Founder and Chief Strategy Officer of CorDx | Yes | UCSD Foundation trustee biography and company press releases |
| Major gifts to UC San Diego | Yes | UCSD announcements in 2024 and 2025 |
Who Is Aiiso Yufeng Li?
Aiiso Yufeng “Jeff” Li is an Asian American nanoengineer, entrepreneur and philanthropist based in San Diego, California. He is best known as the founder of CorDx, a company that makes medical diagnostic tests. He also serves as a trustee of the UC San Diego Foundation. He keeps his private life out of the press, so many personal details are not public.
| Detail | Information |
|---|---|
| Full name | Aiiso Yufeng “Jeff” Li |
| Profession | Entrepreneur, nanoengineer, philanthropist |
| Company | CorDx (parent company: AL21) |
| Position | Founder and Chief Strategy Officer |
| Based in | San Diego, California, USA |
| Public roles | UC San Diego Foundation trustee; adviser to the Jacobs School of Engineering |
| Date of birth / age | Not publicly confirmed |
| Education | Not confirmed by UCSD or CorDx official sources |
| Children | Not publicly confirmed |
| Net worth (2026) | No verified figure |
Some smaller websites say he studied biology at Hebei Normal University and graduated in 2003. Because UCSD and CorDx do not confirm this, we have left it out of the table.
What Is CorDx and How Is It Linked to Li?
CorDx is a global biotechnology company that researches, makes and sells in-vitro diagnostic tests, including rapid at-home tests. UCSD describes operations in San Diego and Atlanta, with manufacturing in the US and abroad. LinkedIn lists the company as starting in 2006, although this is self-reported.
- Products: rapid tests for COVID-19, flu and other conditions.
- Approval: CorDx received FDA Emergency Use Authorisation for a COVID-19 antigen test in 2022, and later for a combined Flu A/B and COVID-19 at-home test.
- AL21: UCSD names AL21 as CorDx’s parent company. “AL” stands for Aiiso and Li, and “21” is his lucky number. “Aiiso” is part of his personal and family name, not a separate operating company.
- Ownership: CorDx is privately held. His exact share of CorDx or AL21 is not public.
- Valuation: none has been published. Claims of user numbers or revenue from databases are unverified.
Note that Li’s confirmed title is Chief Strategy Officer, not CEO. He should also not be confused with the listed company Co-Diagnostics or with other businesspeople who share his name.
How At-Home Tests Are Regulated
In the United States, a test can reach the market through an Emergency Use Authorisation during a declared health emergency, or through full FDA clearance or approval. In the UK, tests are regulated by the Medicines and Healthcare products Regulatory Agency (MHRA) and must carry the correct conformity marking. Approval is slow and costly, which is one reason accuracy and patient safety matter so much in this sector.
The Diagnostics Business After Covid
The pandemic created a huge, sudden market for rapid tests, and many firms grew quickly. Demand fell sharply when the emergency ended, so companies such as CorDx have moved into flu, respiratory and other tests. CorDx now also talks about faster testing, artificial intelligence for business use in diagnostics, and more US manufacturing. That boom and slowdown is why any guess at a founder’s wealth from that period is unreliable.
Aiiso Yufeng Li’s Donations to UC San Diego
His philanthropy is the best-documented part of his public profile. UCSD has announced four gifts linked to Li, his family and CorDx, worth about $29.1 million in total.
| Date | Amount | Purpose | Given by |
|---|---|---|---|
| February 2024 | $3 million | Sustainable Power and Energy Center (Jacobs School) | Through CorDx, with Doreen Guo |
| February 2024 | $2.1 million | Department of NanoEngineering | The Aiiso Yufeng Li Family |
| May 2024 | $21 million | Chemical and nano engineering; department renamed the Aiiso Yufeng Li Family Department of Chemical and Nano Engineering | Li family, with support from members of the CorDx family |
| January 2025 | $3 million | Entrepreneurship efforts at the Jacobs School | Announced by UCSD; AL21 named as CorDx parent |
Chart: Share of the $29.1 million given to UCSD
- $21m chemical and nano engineering gift (72%)
- $3m sustainable energy gift (10%)
- $2.1m nanoengineering gift (7%)
- $3m entrepreneurship gift, 2025 (10%)
Source: UC San Diego announcements (2024 to 2025). Percentages are rounded.
Chart: Size of each gift ($ million)
What Do the Donations Say About His Net Worth?
Very little, in numbers. The gifts came from different sources: Li’s family, CorDx and other members of the CorDx family. The $21 million gift, for example, should not be described as one personal cheque. Gifts also tell us nothing about his debts, ownership or other assets. They show capacity to give, not a net worth. The same caution applies when you read the startup capital and valuation claims made for any private firm.
Career Timeline
| Date | Milestone |
|---|---|
| 2006 | CorDx’s reported start (LinkedIn, self-reported) |
| 2022 | FDA Emergency Use Authorisation for a CorDx COVID-19 antigen test |
| February 2024 | $3 million and $2.1 million gifts announced by UCSD |
| May 2024 | $21 million gift; department named after the Li family |
| October 2024 | CorDx announces MasterControl software for global quality and manufacturing; Li quoted as founder and Chief Strategy Officer |
| November 2024 | UCSD names him as a UC San Diego Foundation trustee |
| January 2025 | Further $3 million gift announced |
| April 2025 | UCSD celebrates the department naming |
| 2026 | Listed as a speaker at a New York Academy of Sciences cancer therapeutics event |
Personal Life and Family
Li was married to Dongdong “Doreen” Li, also known as Doreen Guo, who appeared with him in several UCSD gift announcements. In a public LinkedIn post, Li said she died in San Diego on 13 May 2026. We offer our condolences. His date of birth, age and the number of his children, if any, are not public, and we have not guessed them.
Assets, Investments and Finances: What Is Known
| Item | Public status |
|---|---|
| Share of CorDx / AL21 | Not confirmed |
| CorDx valuation | None published |
| Company revenue and profit | Not audited or published |
| Property and vehicles | Not confirmed |
| Personal investments | Not confirmed |
| Debts and legal judgements | None reported |
Without ownership, asset and debt data, an accurate calculation is not possible. Before starting a firm of your own, it is worth reading how much money you really need to start a business, as most founders hold wealth in company shares that are hard to value.
Reading Founder Wealth Figures
Private founders rarely disclose their wealth, and private company valuations are not published. Donations and press releases can signal success, but they are a poor guide to net worth. For another business profile, see our page on Rami Bitar.
Is Aiiso Yufeng Li Connected to TikTok or ByteDance?
No. No credible source shows that he founded, co-founded or leads ByteDance or TikTok. The claim comes from a name mix-up on one net worth website. He is the CorDx founder and should be kept separate from other business people called Yufeng Li or Li Yufeng.
Read Also: Kevin Doyle Actor Net Worth: Age, Career, Wife & Updates
Final Thoughts
Aiiso Yufeng Li’s net worth is not publicly verified, and no credible source supports a billionaire label. What is confirmed is that he founded CorDx, serves as its Chief Strategy Officer, and has been linked to about $29.1 million of gifts to UC San Diego, given through his family and company. Treat any exact net worth figure as unproven until a reliable wealth index or company filing says otherwise.
FAQs
What is Aiiso Yufeng Li’s net worth in 2026?
It is not publicly verified. He does not appear on Forbes or Bloomberg wealth lists, and no reliable figure exists.
Is Aiiso Yufeng Li a billionaire?
There is no evidence that he is. Some blogs claim it, but trusted sources do not confirm it.
Who is Aiiso Yufeng Li?
He is a biotechnology entrepreneur and the founder and Chief Strategy Officer of CorDx, based in San Diego.
Is he the CEO of CorDx?
The strongest sources, including UCSD, call him founder and Chief Strategy Officer, not CEO.
What is CorDx worth?
No verified valuation exists. CorDx is private and does not publish its financial results.
How much has he given to UC San Diego?
UCSD announced four gifts totalling about $29.1 million between 2024 and 2025, made by his family, CorDx and others.
Who was his wife?
Dongdong “Doreen” Li, also known as Doreen Guo. Li announced publicly that she died in May 2026.
Is he the founder of ByteDance?
No. That claim is a name mix-up and is not supported by credible sources.
How old is he?
His date of birth and age are not publicly confirmed.
Sources: UC San Diego Foundation trustee biography; UC San Diego Today gift announcements (February 2024, May 2024, January 2025); Business Wire (May 2024 and April 2025); PR Newswire (October 2024); New York Academy of Sciences speaker page; Li’s public LinkedIn profile.