About Addition Therapeutics
Addition Therapeutics is a private company based in South San Francisco, California, incorporated in 2021 in Delaware. It has reported $28,000,000 raised in one offering on Form D since December 2025.
Funding Rounds (SEC Form D)
| First sale | Filed with SEC | Amount sold | Investors | Avg. check | Terms | Filing |
|---|---|---|---|---|---|---|
| Dec 11, 2025 | Dec 22, 2025 | $28,000,000fully sold | 9 | $3.1M | Debt, Options, Securities on exerciseRule 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 Addition Therapeutics's Form D filed Dec 22, 2025.
KC
Kathleen Collins
Director
JP
Jayson Punwani
Director
MP
Matthew Patterson
Director
PB
Peter Bisgaard
Director
LK
Lawrence Kong
Secretary
JL
Jennifer Lee
Director
LS
Laetitia Schwab
Director
RP
Ronald Park
Executive officer and director