Angel investor based in United States. 8 companies backed across 8 recorded rounds, Jan 2012 – Jan 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 Rosenblatt appears as an investor in, most recent round first.
| Company | City | Sectors | Latest round | Rounds | Round value |
|---|---|---|---|---|---|
| Marketecture | New York City | Marketing Services | Seed Jan 2026 | 1 | $1M |
| Firsthand | New York City | AdTechArtificial IntelligenceNative AI in Advertising | Series A Mar 2025 | 1 | $26M |
| Coder | Austin | Application Development ToolsOpen SourcePaaS | Seed Oct 2018 | 1 | $6.9M |
| Great Jones | New York City | Property Management TechProperty Management Suite | Series A Apr 2018 | 1 | $8M |
| Artbinder | New York City | Art and Museum TechTravel and Hospitality SaaS | Series A Jul 2014 | 1 | $3.2M |
| Fundera | New York City | Alternative LendingFinTechOnline Loan Comparison Platforms | Series A Feb 2014 | 1 | $3.4M |
| Retrofit | Chicago | Fitness & Wellness TechHealthcare ITFitness and Diet Apps | Seed Feb 2012 | 1 | $2.6M |
| Artspace | New York City | Art E-CommerceB2C E-Commerce | Series A Jan 2012 | 1 | $2.5M |
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 |
|---|---|---|---|---|
| AperiamVentures | Firm | New York City | 2 | 2 |
| Dave Eisenberg | Angel | New York City | 1 | 1 |
| Adam Freed | Angel | Brooklyn | 1 | 1 |
| Matt Dickinson | Angel | Sydney | 1 | 1 |
| Blue Equity | Firm | Louisville | 1 | 1 |
| Michael Yavonditte | Angel | Greenwich | 1 | 1 |
| Matt Ocko | Angel | San Francisco | 1 | 1 |
| Founders Fund | Firm | San Francisco | 1 | 1 |
| Jim Payne | Angel | 1 | 1 | |
| Grant Gregory | Angel | New York City | 1 | 1 |
| Social Leverage | Firm | Scottsdale | 1 | 1 |
| Felicis Ventures | Firm | Menlo Park | 1 | 1 |
| Howard Lindzon | Angel | San Diego | 1 | 1 |
| Lerer Hippeau | Firm | New York City | 1 | 1 |
| Pritzker Group | Firm | Chicago | 1 | 1 |
| Alec Guettel | Angel | 1 | 1 | |
| Rob Wiesenthal | Angel | 1 | 1 | |
| Zigg Capital | Firm | New York City | 1 | 1 |
| Index Ventures | Firm | London | 1 | 1 |
| AlleyCorp | Firm | New York City | 1 | 1 |