How much is Daniel Nadler Worth? Daniel Nadler Net Worth in 2026
Daniel Nadler’s net worth is estimated at $8.5 billion as of November 2026. He was OpenEvidence’s first seed investor, writing a check of about $10 million. The stake he holds in the medical AI company is now priced at roughly 840 times that.
| Net worth | $8.5 billion (our estimate) |
|---|---|
| Born | 1983, Toronto, Canada |
| Country | Canada (lives in Surfside, Florida) |
| Known for | Founder and CEO of OpenEvidence; co-founder of Kensho |
| Main income sources | OpenEvidence shares, Kensho sale |
How much is Daniel Nadler worth in 2026?
About $8.5 billion. Nadler owned roughly 60% of OpenEvidence in July 2025, Forbes Australia reported. Three rounds have been sold since then, each taking a slice. We worked out the dilution round by round and land at about 56%, valued at the $15 billion price from September 2026. The company is private and has not confirmed his stake, so treat this as an estimate.
How the $8.5 billion adds up
| Source | Our estimate | What it rests on |
|---|---|---|
| OpenEvidence, about 56% | $8.4 billion | Our calculation: 60% in July 2025, diluted by the $200 million round at $6.1 billion, the $250 million round at $12 billion and the $250 million round at $15 billion (each treated as post-money), leaves 55.9%. 55.9% of $15 billion is $8.38 billion. |
| Kensho sale, after tax | $70 million | He owned 20% of Kensho, which S&P Global bought for $550 million in 2018: $110 million. We assume about 25% tax, leaving $82.5 million, then subtract the roughly $10 million he put into OpenEvidence. That leaves $72.5 million, about $70 million. |
| Total | $8.5 billion | $8.45 billion before rounding. |
A poet with a credit derivatives PhD
Nadler studied mathematics, classics and poetry at Harvard, then wrote a PhD on pricing credit derivatives, finished in 2016. While still a student he co-founded Kensho, an AI company that analysed financial data, which S&P Global bought in 2018 for $550 million, according to his biography. In between he published a poetry collection with Farrar, Straus and Giroux and co-financed the Justin Timberlake film Palmer.
Kensho money was real but not huge. The headline price with retention bonuses was closer to $700 million, Forbes Australia said, and his 20% of the $550 million deal price comes to $110 million before tax. He then put about $10 million of his own money into OpenEvidence, which he started in 2021, before it took any venture funding.
Four price tags in 20 months
OpenEvidence answers clinical questions for doctors, free, and sells advertising to drug and device makers. The valuations have climbed in steep steps, according to Sacra’s funding history:
- February 2025: $75 million at $1 billion
- Mid-2025: $210 million at $3.5 billion
- October 2025: $200 million at $6.1 billion
- January 2026: $250 million at $12 billion, led by Thrive Capital and DST, HLTH reported
- September 2026: $250 million at $15 billion, AI Weekly reported, citing Business Insider
The revenue grew faster than the price. Sacra estimates $7.9 million at the end of 2024, $150 million at the end of 2025 and $300 million annualized by July 2026, with 90% gross margins.
The $10 million seed check
By our calculation, his roughly $10 million seed investment sits under a stake now priced at about $8.4 billion, around 840 times the money. That flatters the check a little, since founder shares are not bought with cash alone. Still, it explains why his stake stayed so large: he funded the early years himself and did not have to sell much of the company to outside investors before it was worth billions.
Another way to see the price: his 56% share of $300 million in annualized revenue is about $168 million a year. Investors valued the whole company at 50 times revenue in September.
Why other estimates disagree
Most public estimates were set after the January 2026 round at $12 billion and have not caught up with September’s $15 billion. Some also apply his 60% stake from 2025 without taking out the later dilution, which overstates him by about $600 million at today’s price.
What would move the figure
A sale. AI Weekly reported in September 2026 that the founders were hearing acquisition interest and might prefer selling to an IPO. A deal would turn the paper stake into cash and put a firm price on it, and tax would then take a slice. The next funding round, or a drop in pharmaceutical ad spending, would move it too.
Daniel Nadler net worth FAQ
What is Daniel Nadler’s net worth?
About $8.5 billion as of November 2026 by our estimate, mostly a 56% stake in OpenEvidence at its $15 billion valuation.
How much did Daniel Nadler make from selling Kensho?
About $110 million before tax by our math: 20% of the $550 million S&P Global paid in 2018.
How much of OpenEvidence does Daniel Nadler own?
About 60% in July 2025 according to a press report. After three later funding rounds we estimate about 56%.
How does OpenEvidence make money?
From advertising by pharmaceutical and medical device companies. Doctors use it free, and annualized revenue reached an estimated $300 million by July 2026.
How old is Daniel Nadler?
He was born in 1983 in Toronto, so he is 42 or 43. He lives in Surfside, Florida.
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How we estimate net worth
Our estimates are based on public reporting, company valuations, and deal and earnings figures all compiled in an internal valuation model. They are approximate, and figures change over time as new information emerges.
Last updated: November 2026.