Fundraising Fox

Addition Therapeutics

South San Francisco, US · Founded 2021 · 69 employees on LinkedIn · 7 known investors

Addition Therapeutics is a biotechnology company developing therapeutics, led by a scientific and clinical team. Its work centers on drug discovery and portfolio development in the life sciences.

BiotechHealthtech

Founders & leadership

Addition Therapeutics was founded in 2021 by Kathleen Collins.

KCKathleen Collins
Kathleen CollinsinFounder
LKLawrence Kong
Lawrence KonginExecutive Director, IP & Legal; Corporate Secretary
RPRon Park
Ron ParkinPresident & CEO
FGFrancine Gregoire
Francine GregoireinChief Scientific Officer
PPPriya Parameswaran
Priya ParameswaraninChief Business Officer

Board

JP
Jayson PunwaniBoard director
PB
Peter BisgaardBoard director
JL
Jennifer LeeBoard director
LS
Laetitia SchwabBoard director
MP
Matthew PattersonBoard director

Investors · 7

SR One Capital ManagementRedwood City
AbingworthreportedLondon · $15M – $30M
Osage University PartnersreportedBala Cynwyd
Pivotal Life SciencesreportedSan Francisco

Also in the syndicate · 3

BEVCGates FoundationSR One

Funding

SEC filings, press & company announcements

$128M disclosed across 2 rounds · 2025

▶$28MraisedDec 2025 · 9 investors · Biotechnology
Rule 506(b)
Officers, directors & promoters on the filing
  • Kathleen CollinsDirector
  • Jayson PunwaniDirector
  • Matthew PattersonDirector
  • Peter BisgaardDirector
  • Lawrence KongExecutive Officer
  • Jennifer LeeDirector
  • Laetitia SchwabDirector
  • Ronald ParkExecutive Officer, Director
Offering amount
$28M
Amount sold
$28M
First sale
Dec 2025
Incorporated
Corporation, Delaware, 2021
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

In the news

Addition Therapeutics: $100 Million Funding Raised To Advance All-RNA PRINT Platform For One-Time Genomic Medicinespulse2.com · Dec 2025Addition Therapeutics Emerges from Stealth with $100 Million to Advance All-RNA Gene Insertion Technology | PackGene Biotechpackgene.com · Dec 2025Addition Therapeutics Announces $100 Million in Funding and Significant Progress Advancing Mission to Fulfill Promise of Genomic Medicine for Chronic and Rare Diseasesfinance.yahoo.com · Dec 2025Addition Therapeutics raises $106.5M for all RNA ‘jumping gene’ therapiesendpoints.news · Dec 2025Addition Therapeutics raises $100 million with Ron Park as CEO - San Francisco Business Timesbizjournals.com · Dec 2025Addition Therapeutics Raises $100M in Fundingfinsmes.com · Dec 2025

Frequently asked questions

What does Addition Therapeutics do?
Addition Therapeutics is a biotechnology company developing therapeutics, led by a scientific and clinical team. Its work centers on drug discovery and portfolio development in the life sciences.
Who founded Addition Therapeutics?
Addition Therapeutics was founded by Kathleen Collins in 2021.
Who are Addition Therapeutics's investors?
Addition Therapeutics's investors include SR One Capital Management, Abingworth, Osage University Partners, Pivotal Life Sciences.
How much funding has Addition Therapeutics raised?
Addition Therapeutics has disclosed $128M raised across 2 rounds.
Where is Addition Therapeutics headquartered?
Addition Therapeutics is headquartered in South San Francisco, US.