About Castellan
Castellan is a private company based in San Francisco, California, incorporated in 2026 in Delaware. It has reported $415,000 raised in one offering on Form D since August 2026. Its chief executive is Stephen Fong.
Funding Rounds (SEC Form D)
| First sale | Filed with SEC | Amount sold | Investors | Avg. check | Terms | Filing |
|---|---|---|---|---|---|---|
| Jul 23, 2026 | Aug 10, 2026 | $415,000target not set | 14 | $29,643 | Simple Agreement for Future Equity (SAFE)Rule 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 Castellan's Form D filed Aug 10, 2026.
SF
MA
Mustafa Akdere
President and director