United States · Investor

Sam Altman

Last cheque observed Jun 2026; 82 cheques on record.

Email

Deploying nowAngel

SeedArtificial IntelligenceBiotechnology

Deploying now
25%of best year3cheques in 12 months, 82 on record
Since the last cheque152days00hrs00min00sec
Median round$15MRounds led0 of 82Sole investor5 roundsExits2 from the portfolioMostly inUnited States, 89%
Pitch Sam Altman

Sam Altman highlights

  1. 01

    3 cheques in the last 12 months

  2. 02

    Mostly Seed and Series A: 74% of its rounds

  3. 03

    Sole investor in 5 rounds, median $95M

  4. 04

    2 exits from the portfolio

What they do

The page is Sam Altman's personal blog post discussing AI and a recent incident, with no mention of investment activities.From their own website
Type
Angel (from a list, unverified)
Cheque size
Not stated
Stages
Seed
Sectors
Artificial IntelligenceBiotechnology
Based in
United States
Cold pitches
Not stated

The record

Every round we can evidence, newest first82 appearances

  1. 2026

    3 rounds

  2. Jun
    Longshot Space TechnologiesVenture · US$5.0MWith 3 others
  3. May
    Retro BiosciencesVenture · USUndisclosedSole investor
  4. Mar
    Red Queen BioSeed · US · Crunchbase News$15MWith 4 others
  5. 2025

    8 rounds

  6. Oct
    Arcadia MedicineSeed · US$9.3MSole investor
  7. Sept
    teachme.toSeed · US$3.0MWith 4 others
  8. Jun
    Coco RoboticsUS · TechCrunch$80MWith 3 others
  9. Jun
    Longshot Space TechnologiesVenture · USUndisclosedWith 2 others
  10. Jun
    cocoSeries B · MX$80MWith 2 others
  11. Jan
    Helion EnergySeries F · US · Crunchbase News$425MWith 10 others
  12. Jan
    Retro BiosciencesSeries A · US · TechCrunch$1.0BSole investor
  13. Jan
    Ashvattha TherapeuticsSeries B · US$50MWith 1 other
  14. 2024

    9 rounds

  15. Dec
    NOYACKSeed · US$3.0MWith 1 other
  16. Oct
    1910 GeneticsVenture · USUndisclosedWith 3 others
  17. Oct
    TerraformationGrant · US$4.2MWith 2 others
  18. Sept
    GALYSeries B · US$33MWith 3 others
  19. Aug
    KamiVenture · NZUndisclosedWith 2 others
  20. Aug
    Beacon AISeries A · US$15MWith 4 others
  21. Jun
    ValueBaseSeed · US$6.3MSole investor
  22. May
    ApexSeed · US$7.0MWith 2 others
  23. Apr
    MinicircleVenture · US$459KWith 4 others
  24. 2023

    7 rounds

  25. Nov
    Software Applications IncorporatedSeed · US$6.5MWith 3 others
  26. Oct
    Induced AISeed$2.3MWith 4 others
  27. Sept
    MentraSeed · US$3.5MWith 2 others
  28. Jun
    UncommonSeries A · GB$30MWith 4 others
  29. Apr
    Arkham IntelligenceSeries A · US$12MWith 3 others
  30. Jan
    Rewind AISeries A · US$18MWith 2 others
  31. Jan
    Queer SpacesVenture · USUndisclosedWith 2 others
  32. 2022

    4 rounds

  33. May
    TipTopSeries A · TR$23MWith 3 others
  34. Apr
    Locket LabsSeed · US$10MWith 1 other
  35. Apr
    ContextSeed · US$20MWith 3 others
  36. Apr
    Retro BiosciencesPre-seed · US$180MSole investor
  37. 2021

    3 rounds

  38. Nov
    ConceptionVenture · US$20MWith 2 others
  39. Aug
    MatrixSeed · US$5.0MWith 3 others
  40. Jul
    NeuralinkSeries C · US · Firms' own news pages$205MWith 11 others
  41. 2020

    2 rounds

  42. Dec
    Doorbell HealthSeed$2.5MWith 2 others
  43. Dec
    RealtimeSeed$4.0MWith 2 others
  44. 2019

    1 round

  45. Jun
    ZeroDownUS · FinSMEs$30MWith 1 other
  46. 2018

    3 rounds

  47. Feb
    CoalitionSeries A · US · FinSMEs$10MWith 4 others
  48. Feb
    Spring DiscoverySeed · US · FinSMEs$4.3MWith 5 others
  49. Jan
    AsanaSeries D · US · TechCrunch$75MWith 2 others

An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor.

The team

We hold 1 person at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them.

Exits from the portfolio

Companies it backed that were later bought or listed2 in all

ExecBought by HandyUndisclosedJan 2014
BufferBoxBought by Google$17MNov 2012

An exit counts when it came after the firm's first round in the company. From historical deal records.

Who they invest alongside

The investors most often in the same rounds as Sam Altman. A count of rooms they were both in, not a relationship either has claimed.

SV AngelVC firm20rounds togetherPaul BuchheitAngel19rounds togetherAlexis OhanianAngel17rounds togetherY CombinatorAccelerator16rounds togetherGarry TanAngel12rounds togetherAndreessen HorowitzVC firm9rounds togetherAshton KutcherVC firm8rounds togetherStart FundVC firm7rounds together500 GlobalAngel6rounds togetherCrunchFundVC firm6rounds togetherGoogle VenturesCorporate VC6rounds togetherJoshua SchachterVC firm6rounds together

Recently backed

The latest companies Sam Altman put money into.

Retro BiosciencesMay 2026Red Queen Bio$15M · Mar 2026Arcadia Medicine$9.3M · Oct 2025teachme.to$3.0M · Sept 2025coco$80M · Jun 2025Helion Energy$425M · Jan 2025

Books by the people here

One book written by people at Sam Altman: Sam Altman.

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On podcasts

6 episodes naming Sam Altman in the title, and 4 more that mention it.

Mentioned in

Quick answers about Sam Altman

What does Sam Altman invest in?

Sam Altman invests most often at Seed and Series A (74% of the rounds on record), in sectors such as Artificial Intelligence and Biotechnology.

How active is Sam Altman?

82 investments on record, 3 of them in the last 12 months. The most recent was in Jun 2026.

What has Sam Altman invested in recently?

Its most recent investments on record: Longshot Space Technologies (Venture, Jun 2026), Retro Biosciences (Venture, May 2026) and Red Queen Bio (Seed, Mar 2026).

How big are Sam Altman's cheques?

The median round it joins is $15M.

Does Sam Altman lead rounds?

Rarely, if at all: none of its 82 investments on record names it as the lead.

Where does Sam Altman invest?

Most of the companies it backs are in the United States (89%).

Is Sam Altman investing now?

Yes: it is actively investing, with 3 investments in the last 12 months.

Who does Sam Altman invest alongside?

Most often SV Angel (20 rounds together), Paul Buchheit (19 rounds together) and Alexis Ohanian (17 rounds together).

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Built from the rounds we watched, its filings and its own website, refreshed every night. How we count · Report a correction · Is this your firm? Claim it