Angel investor · San Francisco, United States
Recorded investments.
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of dated first investments
were at Angel, Pre-Seed or Seed
One dot = one company at first recorded investment.
Written insights from the recorded portfolio, with the evidence linked below.
Sam Altman has dated investments in 57 companies. 24 first entries were at Angel, Pre-Seed or Seed (42.1%). An early-stage founder can use the sector and stage filters to find comparable companies before approaching the investor.
Explore the evidence ↗2 first company relationships appear in the latest 24 months, compared with 6 in the preceding window. The latest recorded investment is 2025-11-14. This describes observed activity through 2026-05-22; it does not establish current availability.
Explore the evidence ↗27 of 55 companies with a full 24-month observation window raised another equity round. This investor backed 5 of those companies again within that window. The difference is a reason to research the wider syndicate, rather than assume the same investor will fund the next round.
Explore the evidence ↗Artificial Intelligence is the largest displayed sector by company count, appearing in 10 portfolio companies; sector tags overlap. 12 first entries carry a recorded lead flag and the median first-round syndicate includes 7 other named backers. Shared rounds are evidence of co-investment, not evidence of an introduction route.
Explore the evidence ↗Start with observed behavior.
Every rate has a defined denominator.
25th–75th percentile across 56 disclosed first rounds. Total round size; the investor’s own cheque is undisclosed.
Size your round ↗22 May 2024–22 May 2026, versus 6 in the preceding 24 months.
See the rhythm ↗27 of 55 companies with a full observation window. The next round can include any investor.
Follow the path ↗5 of the same 55 companies. Build a financing plan around the wider investor market.
Explore co-investors ↗Choose your sector and stage to find
companies he first backed in that space.
A match means a recorded investment in this category. It does not establish current interest or availability.
All sectors · All entry stages. Round amounts are total financing, in USD.
Provider of genetic testing and research solutions for disease prevention and early detection
$30M total first roundDeveloper of automated valuation models for property valuation and analysis
$6.3M total first roundAI based security and risk management platform for businesses
$7.0M total first round| Sector | Angel | Seed | Series A | All stages |
|---|---|---|---|---|
| Artificial Intelligence | 10 | |||
| B2C E-Commerce | 8 | |||
| FinTech | 6 | |||
| Gig Employers | 6 | |||
| Life Sciences | 5 | |||
| Future of Work | 4 | |||
| AI as a Service | 4 |
Use stage-specific financing ranges
to frame the size of your syndicate.
Logarithmic scale. A dot marks the median; the band spans the 25th–75th percentiles. These are entire rounds, not individual cheques.
A subsequent round and repeat backing
answer different fundraising questions.
Includes first investments on or before 22 May 2024. 2 newer companies and 2 undated histories are excluded. Follow-up stops at the dataset’s latest round on 22 May 2026. These observations do not measure returns or predict a company’s outcome.
| First stage | Eligible companies | Next round ≤24 mo | Same investor again ≤24 mo |
|---|---|---|---|
| Angel | 1 | 1 / 1 | 0 / 1 |
| Seed | 21 | 12 / 21 | 2 / 21 |
| Series A | 16 | 9 / 16 | 1 / 16 |
| Series B | 12 | 4 / 12 | 1 / 12 |
| Series C | 4 | 1 / 4 | 1 / 4 |
| Series E+ | 1 | 0 / 1 | 0 / 1 |
Separate first investments from later
rounds in companies already backed.
*2026 is partial, through 22 May. Bar height counts first investments + repeat rounds; earlier years are complete calendar periods in this dataset.
Frequent shared rounds suggest a place
to investigate sector and stage alignment.
14 shared rounds · 13 companies
Latest shared round Oct 202310 shared rounds · 8 companies
Latest shared round Nov 20259 shared rounds · 9 companies
Latest shared round Aug 20248 shared rounds · 6 companies
Latest shared round May 2024Shared rounds establish recorded co-investment. They do not establish a personal connection, introduction route, or current willingness to invest.
First investment comes first.
Amounts refer to that entry round.
| Company | First backed | Entry stage | Total entry round | Same investor again? |
|---|---|---|---|---|
Preventive ↗San Francisco | Nov 2025 | Angel | $30M | No later round recorded |
ValueBase ↗Durham | Jun 2024 | Seed | $6.3M | No later round recorded |
Apex ↗Tel Aviv | May 2024 | Seed | $7.0M | No later round recorded |
Exowatt ↗Miami | Apr 2024 | Seed | $20M | Yes · Nov 2025 |
Induced ↗Palo Alto | Oct 2023 | Seed | $2.3M | No later round recorded |
Teach Me To ↗San Francisco | Sep 2023 | Seed | $2.0M | No later round recorded |
Motion ↗Mountain View | Sep 2022 | Series A | $13M | No later round recorded |
Meter ↗San Francisco | May 2022 | Series B | $38M | Yes · Feb 2024 |
TipTop ↗New York City | May 2022 | Series A | $23M | No later round recorded |
TipTop ↗Anaheim | May 2022 | Series A | $23M | No later round recorded |
Locket Labs ↗Los Angeles | Apr 2022 | Seed | $10M | No later round recorded |
Hermeus ↗Atlanta | Mar 2022 | Series B | $120M | No later round recorded |
Helion ↗Everett | Nov 2021 | Series E+ | $500M | No later round recorded |
BRINC Drones ↗Las Vegas | Oct 2021 | Series A | $25M | No later round recorded |
Roboflow ↗Des Moines | Sep 2021 | Series A | $21M | Yes · Aug 2024 |
Journey Colab ↗San Francisco | Sep 2021 | Series A | $12M | No later round recorded |
| Sep 2021 | Series A | $248M | No later round recorded | |
Airlift Express ↗Frankfurt Am Main | Aug 2021 | Series B | $85M | No later round recorded |
Airlift Tech ↗Lahore | Aug 2021 | Series B | $85M | No later round recorded |
Neuralink ↗Fremont | Jul 2021 | Series C | $205M | No later round recorded |
Coco Delivery ↗Sacramento | May 2021 | Series A | $57M | No later round recorded |
Routable ↗San Francisco | Apr 2021 | Series B | $30M | No later round recorded |
Realtime ↗Santa Cruz | Dec 2020 | Seed | $4.0M | No later round recorded |
Humane ↗San Francisco | Sep 2020 | Series A | $30M | Yes · Sep 2021 |
Atmos ↗San Francisco | Jul 2020 | Seed | $2.0M | No later round recorded |
TrueNorth ↗San Francisco | Apr 2020 | Seed | $3.0M | Yes · Dec 2021 |
Aspen Neuroscience ↗San Diego | Apr 2020 | Series A | $70M | No later round recorded |
ZeroDown ↗San Francisco | May 2019 | Series A | $30M | No later round recorded |
Boom Supersonic ↗Denver | Jan 2019 | Series B | $100M | No later round recorded |
Titan ↗New York City | Oct 2018 | Seed | $2.5M | No later round recorded |
Rescale ↗San Francisco | Jul 2018 | Series B | $32M | Yes · Nov 2021 |
Coalition ↗San Francisco | Feb 2018 | Series A | $10M | No later round recorded |
Spring ↗San Carlos | Feb 2018 | Seed | $4.3M | No later round recorded |
Asana ↗San Francisco | Mar 2016 | Series C | $50M | Yes · Feb 2018 |
Triplebyte ↗San Francisco | Sep 2015 | Seed | $3.0M | No later round recorded |
Cruise ↗San Francisco | Jun 2015 | Series A | $17M | No later round recorded |
FarmLogs ↗Ann Arbor | Dec 2014 | Series B | $10M | Yes · Jan 2017 |
Change ↗India | Dec 2014 | Series C | $25M | No later round recorded |
Reddit ↗San Francisco | Oct 2014 | Series B | $50M | Yes · Jul 2017 |
Reddit ↗San Francisco | Sep 2014 | Series B | $50M | No later round recorded |
Presto ↗San Carlos | Sep 2014 | Series C | $35M | No later round recorded |
Instacart ↗San Francisco | Jun 2014 | Series B | $44M | No later round recorded |
Patreon ↗San Francisco | Jun 2014 | Series A | $15M | No later round recorded |
Nervana Systems ↗San Diego | Apr 2014 | Seed | $600K | No later round recorded |
Vicarious ↗San Francisco | Mar 2014 | Series B | $40M | No later round recorded |
Lob ↗San Francisco | Nov 2013 | Seed | $2.4M | No later round recorded |
Heap ↗San Francisco | Aug 2013 | Seed | $2.0M | No later round recorded |
Swiftype ↗San Francisco | Aug 2013 | Seed | $1.7M | No later round recorded |
| Apr 2013 | Series A | $12M | No later round recorded | |
Virool ↗San Francisco | Feb 2013 | Seed | $6.6M | No later round recorded |
Clever ↗San Francisco | Oct 2012 | Seed | $3.0M | No later round recorded |
Exec ↗San Francisco | May 2012 | Seed | $3.3M | No later round recorded |
Custora ↗New York City | Jan 2012 | Seed | $850K | No later round recorded |
Codecademy ↗New York City | Oct 2011 | Series A | $2.5M | No later round recorded |
SingleStore ↗San Francisco | Jun 2011 | Seed | $2.1M | No later round recorded |
Optimizely ↗San Francisco | Nov 2010 | Angel | $1.2M | No later round recorded |
Stripe ↗San Francisco | Jan 2010 | Seed | Undisclosed | No later round recorded |
No companies match these filters. Try a broader sector or stage.
Kept in the 58-company portfolio; excluded from entry-timing calculations.
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