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Addition Therapeutics

South San Francisco, California 94080, US
https://additiontx.com/
Addition Therapeutics is a biotechnology company developing all-RNA, non-viral, lipid nanoparticle (LNP)-based PRINT™ (Precise RNA-Mediated Insertion of Transgenes) therapeutics designed for precise, durable, one-time treatments. The company focuses on creating PRINTed medicines to enable precise transgene insertion into genomic safe-harbor sites for chronic and rare disease indications and is advancing a pipeline of LNP-delivered RNA programs originating from UC Berkeley research.

Leadership & Board

Current Number of Employees69
Current LinkedIn Followers5,653

Latest Estimated Valuation

Estimated Valuation―
Estimated Valuation―
Total Amount Raised$100M
Total Amount Raised$100M
Total Funding Rounds1
Total Funding Rounds1
Latest Funding Amount$100M
Latest Funding Amount$100M
Latest Funding RoundInvestment
Latest Funding RoundInvestment
Post-Money Valuation―
Post-Money Valuation―

Employee Trend

Addition Therapeutics had 69 employees as of September 28, 2026. The number of employees increased by 1 (1.47%) week-over-week.
69Latest Employee Count
1(1.47%)Week-Over-Week Change
Employee Trend serves as a data-driven indicator of company growth and expansion. The measurement reflects how a company’s workforce size changes over time.

Social Trend

Addition Therapeutics had 5,653 followers as of September 28, 2026. The number of followers increased by 26 (0.46%) week-over-week.
5,653Latest Followers Count
26(0.46%)Week-Over-Week Change
LinkedIn Follower Trend serves as a data-driven indicator of market interest and company visibility. The measurement reflects how a company’s LinkedIn follower count changes over time.

Funding Round

Funding Date
Funding Round
Amount Raised
Post-Money Valuation
Dec 17, 2025
Investment
$100.00M
―

Investors

Investor Name
Funding Round
Investment
Investment
Investment

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