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3
Mar
2026
T-cell Engagers for Autoimmune Disease: Ken Song on The Long Run
Ken Song is today’s guest on The Long Run.
First things first, this episode was recorded before news broke that Candid Therapeutics went public via a reverse merger with RallyBio. But I must say, that deal was no surprise.

Ken Song, CEO, Candid Therapeutics
Ken was on The Long Run five years ago, in November 2021. At that time, he was CEO of San Diego-based RayzeBio. That company was developed targeted radiopharmaceuticals for cancer. It ended up going public and then was quickly acquired by Bristol Myers Squibb for $4.1 billion in December 2023.
Ken struck me then as someone with good entrepreneurial instincts. He’s back in the arena again with another startup with potential.
This time, he’s CEO of San Diego-based Candid Therapeutics. It’s a startup developing bispecific T-cell engaging antibodies to treat autoimmune diseases. It has raised $370 million in venture capital. The company’s two lead drug candidates are in clinical trials.
Candid is hoping to be part of a wave of innovation in the treatment of autoimmune disease. We’ve seen remarkable results with CAR-T cell therapies in patients with autoimmune disease, who achieve “an immune reset.” That’s a tantalizing result, but one that’s unlikely to scale to the millions of people with autoimmune diseases. Ken and his team are wagering that T-cell engaging antibodies will achieve a similar biological effect, but in a more practical, scalable, and cost-effective shot that comes in a vial.
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Please enjoy this conversation with Ken Song on The Long Run.





















































