/Investor DB

Flagship Pioneering — 2026 Investments

2 investments dated 2026 · listed companies and verified rows first · show all

Harbinger Healthharbinger-health.comin𝕏Series A · Apr 2026 · $100M

Harbinger Health develops early cancer detection technology through its Harbinger HX platform, which embeds developmental biology into biomarker discovery, assay design, and model training to detect faint biological signals of early cancer in real-world samples.

AI & Machine LearningBiotechDigital HealthHealthtech

Co-investorsCatalyst

Serif Biomedicinesserifbiomedicines.cominApr 2026 · $50M

Serif Biomedicines develops DNA-based therapies and nucleic acid delivery technologies for genetic medicine.

BiotechDeep TechDigital HealthMedical DevicesCambridge, US

Jacob Rubens(Chief Executive Officer)in

Co-investorsModi Ventures

Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.