BREAKING Retro Biosciences valued at $1.8 BILLION (2026) Lead drug RTR242 dosing humans in Adelaide Goal: add 10 healthy years to human lifespan Seed round: $180M from Sam Altman, single investor BREAKING Retro Biosciences valued at $1.8 BILLION (2026) Lead drug RTR242 dosing humans in Adelaide Goal: add 10 healthy years to human lifespan Seed round: $180M from Sam Altman, single investor
Company · Longevity Biotech · Redwood City, CA

Retro Biosciences wants to sell you a decade.

Not a supplement. Not a wellness subscription. A clinical-stage attempt to add ten healthy years to the human lifespan - and a Phase 1 trial that is already underway.

Retro Biosciences logo with the tagline Adding 10 Years to Healthy Human Lifespan

The company mission, printed plainly enough to fit on a business card. Retro Biosciences - where the marketing copy is also the entire scientific to-do list.

10
healthy years, the goal
$1.8B
2026 valuation
$180M
seed, one investor
~93
employees
Dispatch from Redwood City

Right now, somewhere in Adelaide, a healthy volunteer is swallowing the most ambitious pill in biotech.

The pill is called RTR242. It is small, unglamorous, and designed to do something deceptively mundane: help aging cells take out their own garbage. In a clinical unit half a world away from Retro Biosciences' Redwood City labs, a randomized, double-blind, placebo-controlled trial is quietly testing whether a drug can restore one of the body's oldest housekeeping systems. The CEO's summary of how it is going: "super good." No dose-limiting toxicities. Data expected in August 2026.

This is what a longevity company looks like once it stops talking about living forever and starts filling out trial paperwork. Retro Biosciences spent its first years in relative quiet. In 2025 it crossed the line that separates ideas from medicine - it dosed a human. In 2026 a new fundraise pinned a number to the ambition: $1.8 billion.

"We're adding 10 years to healthy human lifespan." Retro Biosciences, on its own homepage
The Problem They Saw

Medicine treats the diseases of aging one at a time. Retro thinks that's the wrong list.

Cancer, Alzheimer's, heart failure, frailty - modern medicine has a department for each. Retro's founding observation is uncomfortably simple: most of these are downstream of the same upstream process. Cells accumulate damage. Their repair and recycling systems slow down. Tissues lose the younger, fitter cells that kept them running. Call it aging, and roughly 90% of US healthcare spending traces back to it.

So the company refuses to chase symptoms. Instead it targets the cellular drivers of aging itself - on the theory that if you fix the engine, you stop replacing the parts one breakdown at a time. It is a tidy argument. It is also, conveniently, the hardest problem in biology.

If aging is the root cause, then every disease ward is just a different symptom of the same overdue repair bill. The Retro thesis, paraphrased
The Founders' Bet

A man who once built the world's smallest computer decided the next thing worth shrinking was the gap between lab and clinic.

Retro Biosciences was co-founded in 2018 by Joe Betts-LaCroix, Sheng Ding, and Matt Buckley, and launched publicly in 2021. Betts-LaCroix, the CEO, is better known in tech circles for helping invent one of the world's smallest personal computers - hardware that helped pave the way for tablets and laptops. He had been knocking around biomedicine since at least 2010. The bet he and his co-founders made was less about a single molecule than about speed: that a vertically integrated, in-house research engine could discover and develop a drug faster than the industry believed possible. The stated timeline - ship a drug "in the 2020s" - is the kind of thing biotech veterans politely call optimistic.

J
Joe Betts-LaCroix
Co-Founder & CEO
Inventor turned longevity founder. Helped build one of the world's smallest PCs before moving into biotech automation and, eventually, the business of buying people extra decades.
S
Sheng Ding
Co-Founder · Scientific
Professor of pharmaceutical chemistry at UCSF and a distinguished investigator at the Gladstone Institutes. A small-molecule and stem-cell reprogramming specialist who has co-founded six biotech companies.
M
Matt Buckley
Co-Founder
PhD in Genetics from Stanford, bioengineering from UC Berkeley. Former systems-integration engineer at Illumina and scientist at Bayer Healthcare's global biologics group.
The Product

Three bets on aging, run at the same time, because the company can't afford to wait and see which one works.

Most startups pick a lane. Retro built three. The logic is portfolio-style: aging has multiple cellular drivers, so attack several in parallel and let the clinic sort out the winners.

Lead · Clinical-stage

Autophagy & RTR242

A small molecule that re-acidifies the lysosome - the cell's recycling plant - so it can clear the toxic protein junk that builds up in aging and Alzheimer's. First-in-human Phase 1 began in 2025.

Platform

Cellular Reprogramming

Using Nobel-winning Yamanaka-factor biology to nudge aged cells toward a younger state - in the body and in the lab. Includes T-cell, blood stem cell, and microglia "micro replacement."

Platform

Plasma-Inspired Therapeutics

Borrowing from the rejuvenating signals found in blood plasma to design therapies that counter age-related decline - the plasmapheresis idea, engineered into a drug.

Underneath all three: single-cell multi-omics, pooled perturbations, and targeted delivery systems - the unglamorous instrumentation that turns a hypothesis into a candidate.

In a younger cell, the lysosome is acidic and the garbage gets cleared. Age it, and the disposal jams. RTR242 is, essentially, a plumber. How the lead drug works, minus the jargon
Milestones

From stealth to a syringe in seven years.

2018
Retro Biosciences founded by Joe Betts-LaCroix, Sheng Ding, and Matt Buckley.
2021
Launches publicly with a $180M seed - the entire round from Sam Altman.
2023
Altman's $180M investment becomes public; Retro emerges as a marquee longevity bet.
Jan 2025
Reported to be raising a ~$1 billion Series A; financier Sandro Salsano joins the board.
2025
Becomes a clinical-stage company - doses the first human with RTR242.
Dec 2025
Reported to be chasing a roughly $5 billion valuation as programs scale.
May 2026
New raise values Retro at $1.8 billion; Phase 1 reports no dose-limiting toxicities, data expected August 2026.
The Proof

The skeptic's question is fair: where are the numbers?

Longevity biotech is allergic to hard data, which is exactly why Retro's milestones matter. A first-in-human trial is not a cure. But it is the difference between a pitch deck and a regulated medicine. Here is the case so far, in figures.

Retro's climb, by the dollars and the decades
Seed (2021)
$180M
Series A (2025)
~$1.0B raised
Valuation '26
$1.8B
Target val.
~$5B (reported)

Bars scaled to the reported ~$5B target. Funding figures are reported/approximate; valuation reflects the 2026 disclosure.

Proof point

0

Dose-limiting toxicities reported in the Phase 1 trial so far.

Proof point

3

Distinct aging-driver programs advancing in parallel.

Proof point

~90%

Share of US healthcare spending Retro ties to age-related disease.

The Mission

Ten years. Healthy ones. That is the whole pitch, and it refuses to get smaller.

Retro calls itself a "generational pharma" - a company built to outlast the usual venture clock. The mission has not been softened into something safer: not "promote wellness," not "support healthy aging." The number is ten, the years must be healthy, and the target is the biology of aging itself. Everything else - the platforms, the trial, the billion-dollar rounds - is logistics in service of that sentence.

A biotech that measures success in decades has to behave like the clock is running. Retro's culture runs on exactly that contradiction. On a company built to move fast and live long

Who's in the arena. Retro is not alone. Altos Labs, Calico, NewLimit, Unity Biotechnology, BioAge, and Turn Biotechnologies are all circling the same question. The difference Retro presses is sequencing: it got a drug into a human first, and treats that as the whole point.

Why It Matters Tomorrow

Back to Adelaide.

The volunteer who swallowed RTR242 will not live to 200 because of it. That is not the experiment. The experiment is narrower and far more consequential: can a drug measurably restore a single, failing cellular system - and can that restoration translate into a healthier brain? If the August data holds, Retro will have done the one thing the longevity field has mostly avoided. It will have shown its work.

And if it doesn't hold, the company has two more bets running and a balance sheet built to absorb the answer. That is the quiet design behind the loud mission. The pill in Adelaide is small. The question it is asking - whether aging is a treatable condition rather than an inevitable one - is the largest one a company can pick up. Retro Biosciences picked it up, wrote the goal on the homepage, and started dosing.