About Particle Horizon
Particle Horizon is a private company based in San Francisco, California, incorporated in 2026 in Delaware. It has reported $135,000 raised in one offering on Form D since October 2026. Its chief executive is Peter Lillian.
Funding Rounds (SEC Form D)
| First sale | Filed with SEC | Amount sold | Investors | Avg. check | Terms | Filing |
|---|---|---|---|---|---|---|
| Aug 6, 2026 | Oct 13, 2026 | $135,000fully sold | 7 | $19,286 | Equity, OptionsRule 506(b) | Form D ↗ |
First sale is the date the first investor in the offering committed to invest. Companies must file Form D within 15 days of that date, so filing dates run later.
Leadership Team
Executive officers and directors listed on Particle Horizon's Form D filed Oct 13, 2026.
PL
Peter Lillian
Chief Executive Officer and director