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Investor profile

Sam Altman

Angel · Mountain View, United States

Pioneering the movement toward artificial general intelligence

121 portfolio companies Angel · $6.6B invested · 146 investments · Investor rank #437 · Last investment 1/2026
Portfolio companies 121 ↑ 82% 5y
Decacorns 4 ↑ 50% 5y
Thoroughbreds 18 ↑ 13% 5y
Power Law #139Investor Ranking · Global · 2026 · Top 1%
Featured in
News Musk loses OpenAI lawsuit as jury says he waited too long to sue May 19, 2026
Estimated holdings

Sam Altman’s biggest current holdings.

An estimate of Sam Altman’s largest live positions — disclosed shareholding × Dealroom’s latest valuation — across 2 companies where Sam Altman is a named shareholder, worth about $870M in estimated equity value.

#CompanyEst. stakeValuationEst. value
  1. 1 Helion EnergyEnergy · Unicorn 14.2% $5.4B $770M
  2. 2 MeterTelecom · Unicorn 10% $1.0B $100M

Estimated value = Sam Altman’s disclosed ownership % × Dealroom’s latest company valuation; direct named stakes only, exited positions excluded. Figures are indicative, not reported marks. Sam Altman also appears inside investor groups in Boom Supersonic, Coalition, Neuralink, OpenAI, Quora, World, where a standalone stake isn’t disclosed. See the underlying cap tables on Dealroom →

Exits

Sam Altman’s biggest exits.

Portfolio companies that IPO’d or were acquired at $1B+, with the valuation recorded at exit and — for those still public — their value today. Exit events come from each company’s funding-round history; entry stage from Sam Altman’s transaction record.

Reddit
$6.4B IPO · 2024
Entered Series B+Now $32BMedia
Oklo
$850M IPO · 2023
Entered SeedNow $4.9BEnergy
Opendoor
$4.8B IPO · 2020
Entered Series ANow $4.0BReal Estate
Asana
$4.4B IPO · 2020
Entered Series B+Now $1.7BEnterprise Software
Cruise
$1.0B acquisition · 2016
Entered Series ARobotics
Portfolio analysis

Where Sam Altman’s portfolio is concentrated.

Distribution of portfolio companies by headquarters country, sector, entry stage and current growth stage. Across all 121 portfolio companies. "Stage entered" is the first priced round the investor joined, derived from the investor’s transaction history.

By countryCount
  1. USA110
  2. Canada2
  3. Israel2
  4. Ghana1
  5. India1
  6. Mexico1
  7. New Zealand1
  8. Pakistan1
  9. Senegal1
  10. UK1
By sectorCount
  1. Enterprise Software25
  2. Health17
  3. Fintech16
  4. Media13
  5. Education12
  6. Transportation11
  7. Jobs Recruitment8
  8. Marketing6
  9. Energy5
  10. Real Estate5
  11. Robotics5
  12. Fashion4
By stage enteredCount
  1. Seed70
  2. Series A30
  3. Series B+18
By growth stageCount
  1. Breakout Stage49
  2. Late Growth42
  3. Early Growth29
Portfolio market map

Inside Sam Altman’s portfolio.

The 60 highest-funded portfolio companies, of 121 tracked.

OpenAI
Enterprise Software · Centicorn
$852B
Cruise
Robotics
$850M
Stripe
Fintech · Centicorn
$159B
Opendoor
Real Estate · Unicorn
$4.0B
Helion Energy
Energy · Decacorn
$16B
Neuralink
Health · Unicorn
$9.7B
Reddit
Media · Decacorn
$32B
Retro Biosciences
Health · Unicorn
$5.0B
Coalition
Security · Unicorn
$5.0B
Boom Supersonic
Transportation · Unicorn
$1.2B
Gusto
Fintech
$9K
Formation Bio
Health · Unicorn
$1.5B
Hermeus
Transportation · Unicorn
$1.0B
Asana
Enterprise Software · Unicorn
$1.7B
SingleStore
Enterprise Software · Unicorn
$1.3B
Quora
Media · Unicorn
$2.0B
Patreon
Music · Unicorn
$4.0B
Aspen Neuroscience
Health
$738M
Lattice
Jobs Recruitment · Unicorn
$3.0B
Rescale
Enterprise Software
$460M
BRINC
Security
$500M
LE TOTE
Fashion
$140M
Meter
Telecom · Unicorn
$1.0B
Humane Ai
Legal
$400M
Humane
Consumer Electronics
$400M
Wave Mobile Money
Fintech · Unicorn
$1.7B
Heap
Marketing
$960M
Optimizely
Marketing
$200M
Titan
Fintech
$400M
Speak
Education · Unicorn
$1.0B
Ashvattha Therapeutics
Health
$345M
Meanwhile
Fintech
$328M
Coco
Food
$320M
Airlift Technologies
Transportation
Alt Platform
Fintech
$325M
Campus
Education
$184M
Panorama Education
Education
$300M
Slope
Fintech
$130M
Science Exchange
Health
$80M
Codecademy
Education
$160M
Lob
Enterprise Software
$200M
Atrium
Legal
Warp
Enterprise Software
$200M
Change.org
Legal
$120M
PlanGrid
Real Estate
$875M
Galy
Fashion
$132M
Motion
Media
$550M
Roboflow
Robotics
$160M
TrueNorth
Transportation
$200M
Exowatt
Energy
$140M
TripleByte
Telecom
$140M
Vital Bio
Health
$192M
Verifiable
Enterprise Software
$108M
Nautilus Labs
Transportation
$136M
Routable
Fintech
$120M
Rain
Semiconductors
$125M
Uncommon
Food
$120M
Magrathea
Energy
$96M
Terraformation
Energy
$150M
Superside
Jobs Recruitment
$120M
Portfolio founders

Where Sam Altman’s portfolio founders come from.

151 founders across the 100 highest-funded portfolio companies — by current location, university attended, and the companies they worked at before founding. Sourced from the founder records the API links to each portfolio company.

LocationCount
  1. United States122
  2. United Kingdom6
  3. Canada3
  4. Norway3
  5. Argentina1
  6. Israel1
  7. Mexico1
  8. Niger1
  9. Poland1
  10. Senegal1
UniversityCount
  1. Stanford University12
  2. Massachusetts Institute of Technology7
  3. Harvard University6
  4. Stanford University Graduate School of Business5
  5. Carnegie Mellon University4
  6. London School of Economics and Political Science4
  7. Harvard Business School3
  8. New York University3
  9. University of California, Berkeley3
  10. University of California, Los Angeles3
Previous companyCount
  1. Alphabet | Google7
  2. Amazon5
  3. McKinsey & Company5
  4. Meta5
  5. Microsoft5
  6. Apple4
  7. Generation Orbit4
  8. NASA4
  9. Stanford University4
  10. The Thiel Foundation4
How Sam Altman stacks up

Similar investors.

Peers the API surfaces as most similar by portfolio shape, with Dealroom investor rank and portfolio scale.

Y Combinator
Accelerator · San Francisco
#64 rank 7,094 companies $1.9T portfolio
Andreessen Horowitz
Venture Capital · Menlo Park
#2 rank 1,187 companies $4.5T portfolio
Founders Fund
Venture Capital · San Francisco
#49 rank 611 companies $6.6T portfolio
Sequoia
Venture Capital · Menlo Park
#3 rank 1,919 companies $22T portfolio
Tiger Global
Private Equity · New York City
#18 rank 811 companies $3.9T portfolio
500 Global
Venture Capital · Palo Alto
#430 rank 2,321 companies $289B portfolio
SV Angel
Venture Capital · San Francisco
#108 rank 985 companies $3.7T portfolio
Kleiner Perkins
Private Equity · Menlo Park
#51 rank 776 companies $8.1T portfolio
Figures on this page are sourced live from the Dealroom next-gen API, joined with Dealroom’s cap-table dataset (estimated holdings) and the Power Law Investor Ranking. News in “Featured in” is drawn from Dealroom’s own coverage — the stories that name this investor, not only those it is the subject of. Market sentiment is omitted until the API exposes it.