Angel investor. 5 companies backed across 5 recorded rounds, Mar 2025 – Feb 2026.
Sectors of the companies in the portfolio, by company count.
Head-office city of the companies in the portfolio.
Rounds by stage.
Total size of the rounds they joined — an angel's own cheque is a share of this, and is not disclosed.
Every company David Singleton appears as an investor in, most recent round first.
| Company | City | Sectors | Latest round | Rounds | Round value |
|---|---|---|---|---|---|
| Mirai | San Francisco | AI InfrastructureArtificial IntelligenceAI as a Service | Seed Feb 2026 | 1 | $10M |
| Duvo | Dover | Business Process Management SoftwareArtificial IntelligenceFuture of Work | Seed Dec 2025 | 1 | $15M |
| Source | Dover | B2B E-CommerceArtificial IntelligenceNative AI in Retail | Seed Jul 2025 | 1 | $1.4M |
| Duna | Amsterdam | GRC SoftwareJustice Tech | Seed May 2025 | 1 | $12.1M |
| Fyxer | London | Enterprise CollaborationArtificial IntelligenceEnterprise Communication | Series A Mar 2025 | 1 | $10M |
Investors that appear in the same rounds. Two names in one round is what "invested together" means here — it is not a claim about a relationship off the cap table.
| Investor | Type | Based | Shared rounds | Shared companies |
|---|---|---|---|---|
| Index Ventures | Firm | London | 2 | 2 |
| Puzzle Ventures | Firm | Beijing | 2 | 2 |
| Adriaan Mol | Angel | Amsterdam | 1 | 1 |
| Christian Reber | Angel | Berlin | 1 | 1 |
| Akshay Kothari | Angel | San Francisco | 1 | 1 |
| Claire Hughes Johnson | Angel | 1 | 1 | |
| Marcelo Claure | Angel | New York City | 1 | 1 |
| Jeanne DeWitt Grosser | Angel | 1 | 1 | |
| Eléonore Crespo | Angel | 1 | 1 | |
| Credo Ventures | Firm | San Francisco | 1 | 1 |
| Ben Parr | Angel | 1 | 1 | |
| Gokul Rajaram | Angel | San Francisco | 1 | 1 |
| Kieran Flanagan | Angel | 1 | 1 | |
| Nico Rosberg | Angel | 1 | 1 | |
| Uncork Capital | Firm | Palo Alto | 1 | 1 |
| Marcin Żukowski | Angel | San Mateo | 1 | 1 |
| 20Growth | Firm | 1 | 1 | |
| Frank Slootman | Angel | 1 | 1 | |
| Roy R. | Angel | 1 | 1 | |
| Vijay Krishnan | Angel | 1 | 1 |