sirna
(7)
Alnylam Pharmaceuticals
Alnylam spent 16 years teaching a fragile strand of RNA to reach the right cells. Now its gene-silencing medicines are a multibillion-dollar business - and the next test is whether the same platform can move from rare diseases into the medical mainstream.
City Therapeutics
City Therapeutics is a Cambridge, Massachusetts biotechnology company engineering the next generation of RNA interference (RNAi) medicines. Founded by pioneers of the RNAi field, including former Alnylam CEO John Maraganore and Nobel-adjacent academic scientists, the company designs novel siRNA trigger molecules and targeting ligands intended to make RNAi drugs more potent, more specific, and able to reach tissues beyond the liver. Launched in October 2024 with a $135M Series A and backed by a further $99.5M Series B in 2026, City is advancing a pipeline led by CITY-FXI for thromboembolic disease and CITY-RBP4 for Stargardt disease, alongside research collaborations with Biogen and Bausch + Lomb.
Creyon Bio
Creyon Bio is a San Diego biotech reinventing how RNA-targeted medicines are designed. Founded in 2019 by former Ionis Pharmaceuticals scientists, the company pairs machine learning with quantum-level molecular modeling in its NucleIQ platform - an AI-Powered Oligo Engineering Engine - to predict the safety, efficacy, and delivery of oligonucleotide-based medicines before they ever reach a lab bench. The goal: replace slow, expensive trial-and-error with computational design rules that make precision therapeutics engineerable 'on demand,' for both rare and common diseases across neuromuscular, CNS, and immunologic areas.
Portal Biotechnologies
Portal Biotechnologies is a Watertown, Massachusetts cell-engineering platform company building tools that push complex cargo - mRNA, siRNA, CRISPR complexes, proteins - into living cells by squeezing them through microscopic holes in a silicon surface, rather than relying on viruses or chemistry. Founded in 2023 by Armon Sharei, the MIT-trained scientist behind SQZ Biotechnologies, Portal sells hardware and consumables to drug discovery and cell therapy labs instead of developing its own drugs. Its instruments are used across more than 100 customer sites, including many of the world's largest pharmaceutical companies, and the company has raised seed and follow-on funding plus a DARPA contract for portable, point-of-care cell manufacturing.
Christian Cobaugh
Christian Cobaugh is a molecular biologist turned biotech operator who has spent more than 15 years at the frontier of genetic medicines. In January 2026 he became CEO of Alloy Genetic Medicines, the nucleic-acid division of Alloy Therapeutics, where he leads work on the AntiClastic cyclic nucleic acid platform for ASOs, siRNA, and other RNA therapeutics. He is best known for founding Vernal Biosciences, an mRNA contract manufacturer he built in Colchester, Vermont, on the premise that everyone who needs mRNA should be able to get it. Before Vernal he was the first scientist in the Alexion-Moderna mRNA partnership and held discovery, development, and manufacturing roles at Arcturus Therapeutics, CRISPR Therapeutics, Translate Bio, and Omega Therapeutics.
Switch Therapeutics
Switch Therapeutics is a South San Francisco preclinical biotech building conditionally activated siRNA (CASi) therapies that only switch on inside the cell types where they're needed. The platform - born from research at Caltech, Harvard and City of Hope - aims to make RNA interference safe enough for the brain, with a lead program targeting APOE for Alzheimer's disease.
Elaine Cheung
Elaine Cheung is Chief Business Officer at Moonwalk Biosciences, a South San Francisco biotech backed by $57 million in funding and co-founded by CRISPR pioneer Feng Zhang and former Illumina CTO Alex Aravanis. With 20+ years navigating the inflection points of genomic medicine - from spinning GRAIL out of Illumina, helping architect its $900M+ Series B, and steering Lyell Immunopharma through its IPO - Cheung brings a rare combination of scientific literacy and deal-making precision. At Moonwalk, she is helping build the business infrastructure for a company that has pivoted from epigenetic editing to siRNA-based therapeutics targeting adipose biology and obesity.