About SightStream Biotherapeutics
SightStream Biotherapeutics is a private company based in Walpole, Massachusetts. It has reported $2,041,165 raised in two offerings on Form D since August 2023.
Funding Rounds (SEC Form D)
| First sale | Filed with SEC | Amount sold | Investors | Avg. check | Terms | Filing |
|---|---|---|---|---|---|---|
| Oct 2, 2025 | Oct 16, 2025 | $1,791,165fully sold | 9 | $199K | Equity, Securities on exercise, Simple Agreement for Future EquityRule 506(b) | Form D ↗ |
| Aug 11, 2023 | Aug 25, 2023 | $250,000of $1.2M target | 2 | $125K | Securities on exercise, Simple Agreement for Future EquityRule 506(b) | Form D ↗ |
| Total, two offerings | $2,041,165 | |||||
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 SightStream Biotherapeutics's Form D filed Oct 16, 2025.
SW
Samuel Wu
Director
WX
Wenkai Xiang
Director
DN
David Neafus
Executive officer
RD
Reza Dana
Director
JW
Jason Werner
President and director
Earlier filings also listed Jiagang Zhao (director, last listed Aug 2023).