Angel investor ·
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.
Ben Sigelman has dated investments in 9 companies. 6 first entries were at Angel, Pre-Seed or Seed (66.7%). An early-stage founder can use the sector and stage filters to find comparable companies before approaching the investor.
Explore the evidence ↗7 first company relationships appear in the latest 24 months, compared with 2 in the preceding window. The latest recorded investment is 2026-03-18. This describes observed activity through 2026-05-22; it does not establish current availability.
Explore the evidence ↗0 of 2 companies with a full 24-month observation window raised another equity round. This investor backed 0 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 ↗AI Infrastructure is the largest displayed sector by company count, appearing in 3 portfolio companies; sector tags overlap. 0 first entries carry a recorded lead flag and the median first-round syndicate includes 4 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 9 disclosed first rounds. Total round size; the investor’s own cheque is undisclosed.
Size your round ↗22 May 2024–22 May 2026, versus 2 in the preceding 24 months.
See the rhythm ↗0 of 2 companies with a full observation window. The next round can include any investor.
Follow the path ↗0 of the same 2 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.
Open-source platform for Large Language Model products
$3.0M total first roundDeveloper of open-source platform for tracing, evaluating, and analyzing AI agents
$3.0M total first roundProvider of cloud-based open-source tools
$13M total first round| Sector | Seed | Series A | Series B | All stages |
|---|---|---|---|---|
| AI Infrastructure | 3 | |||
| Artificial Intelligence | 3 | |||
| DevOps | 3 | |||
| Open Source | 2 | |||
| ML Model Monitoring | 1 | |||
| AI as a Service | 1 | |||
| Continuous Delivery | 1 |
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. 7 newer companies and 0 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 |
|---|---|---|---|
| Seed | 1 | 0 / 1 | 0 / 1 |
| Series A | 0 | 0 / 0 | 0 / 0 |
| Series B | 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.
2 shared rounds · 2 companies
Latest shared round Mar 20262 shared rounds · 2 companies
Latest shared round Mar 20262 shared rounds · 2 companies
Latest shared round Sep 2025Shared 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? |
|---|---|---|---|---|
Laminar ↗San Francisco | Mar 2026 | Seed | $3.0M | No later round recorded |
Laminar ↗San Francisco | Mar 2026 | Seed | $3.0M | No later round recorded |
MetalBear ↗Tel Aviv | Sep 2025 | Seed | $13M | No later round recorded |
MetalBear ↗San Francisco | Sep 2025 | Seed | $13M | No later round recorded |
Player Zero ↗Atlanta | Jul 2025 | Seed | $5.0M | No later round recorded |
Odigos ↗Tel Aviv | Sep 2024 | Series A | $13M | No later round recorded |
Gentrace ↗San Francisco | Aug 2024 | Series A | $8.2M | No later round recorded |
WarpStream ↗Chicago Heights | Mar 2024 | Series B | $20M | No later round recorded |
Continua AI, Inc. ↗New York City | Apr 2023 | Seed | $8.0M | No later round recorded |
No companies match these filters. Try a broader sector or stage.
Kept in the 9-company portfolio; excluded from entry-timing calculations.
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