About TestBox
TestBox is a private company based in Boulder, Colorado, incorporated in 2020 in Delaware. It has reported $11,447,000 raised in one offering on Form D since October 2025. Its chief executive is Samuel Senior.
Funding Rounds (SEC Form D)
| First sale | Filed with SEC | Amount sold | Investors | Avg. check | Terms | Filing |
|---|---|---|---|---|---|---|
| Jul 25, 2025 | Oct 28, 2025 | $11,447,000fully sold | 5 | $2.2M | EquityRule 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 TestBox's Form D filed Oct 28, 2025.
EZ
Elaine Zelby
Director
EM
Elicia McDonald
Director
PH
Peter Holland
Director
SS
Samuel Senior
Chief Executive Officer and director