Palomar Labs · Brain-health venture studio

Rediscovering the medicines of the mind.

A venture builder that modernizes overlooked medicines with prior human use, secures new intellectual property, and builds a category-owning company around each — one brain-health category at a time.

Our model Contact
Negev Labs is now Palomar Labs. One team building across the categories of the aging brain. The model and the programs carry forward, with Ariadne Bio entering Phase 1b.
The thesis · The mindspan gap

Medicine extended lifespan. It did far less for the aging mind.

Modern medicine extended how long we live. It did far less for the aging mind. Late-life neuropsychiatric disease now defines how those decades are lived, across distinct categories, each underserved. That is why the right vehicle is a studio, not a single drug.

Starting from scratch in neuropsychiatry is slow and fails often. You cannot ask a mouse how it feels, which is why the drugs that can reach this generation are ones with histories of human use and a measurable clinical endpoint.

Lifespan Healthy mindspan THE GAP FUNCTION LATE LIFE
150,000 people turn 65 every day, worldwide.

More than 150,000 people cross into late life every day. Each carries decades that medicine has extended but not yet made worth living, across category after underserved category.

Derived from UN World Population Prospects (approximately 55 million people reach age 65 each year).

The model

Development left unfinished. Ours to complete.

We don't start from zero. We rediscover.

Palomar modernizes overlooked drugs with prior human exposure, secures new IP, and builds a category-owning company around each rediscovered asset, then does it again, behind the next drug.

Industry standard

Start from zero. Target biology first, human relevance years away, high capital committed before the first patient.

The Palomar model

Start from human evidence. Prior human safety data, an earlier clinical path, and new IP around a better indication, formulation, or analog.

Many were not failed drugs. They were stranded by prior-era endpoints, market timing, weak sponsorship, or a lack of category focus. Four gates before we build:

01Prior human exposureA documented history of human use, with a known safety profile.
02Protectable IPRoom to secure new composition, formulation, or method-of-use claims.
03Tractable biologyA mechanism we can act on, and measure.
04Measurable clinical endpointA defined, regulatable readout of benefit.

Underwriters, not advocates.

We kill the many quickly and carry the few to value inflection. The first experiment is the cheapest one that can kill the program.

The edge is not the archives. It is the combination: proprietary inputs, the partnership's judgment and bench, the IP wrapped around each asset, and the speed to execute.

The engine · NAXOS

NAXOS surfaces. The partnership decides.

NAXOS is disciplined sourcing and scoring, not the decision and not automation. The point is breadth, memory, and disciplined triage: proprietary sources others overlook, scoring against a known benchmark, and a partnership that makes every advance-or-kill call.

Inputs
Proprietary and native-language data sets, public and regulatory archives
Disciplined scoring
Against a known benchmark
Candidates surface
The partnership decides
What goes in
Proprietary archives Native-language data sets Public & regulatory archives
What comes out

A small set of top-tier assets. NAXOS surfaces them; the partnership makes every advance-or-kill call.

The portfolio

Programs at inflection.

Proof of the model, not ahead of it. Each program is a rediscovered asset carried toward its first clinical readout.

Class Motivant

There is no FDA-approved therapy for apathy in Parkinson’s disease. AB-300 is an investigational therapy for apathy in Parkinson’s disease and late-life depression.

Granted U.S. patent
Entering Phase 1b
Athena
Class Serenic

Non-sedating control of agitation and aggression, beginning at a defined lead indication with no approved therapy and extending by mechanism to broader behavioral disturbance associated with neurodegeneration.

Candidate selection
Program 03
Undisclosed

A rediscovered drug with extensive prior human exposure, in diligence for vitality and late-life function.

In diligence
How the model builds categories

Own by vacancy, then own by differentiation.

Each class begins at a beachhead with no approved therapy, then expands by mechanism into a platform across related conditions.

Class Motivant
BeachheadApathy in Parkinson’s diseaseOwn by vacancy
ExpansionLate-life depression
PlatformMotivational decline across neuropsychiatryOwn by differentiation
Class Serenic
BeachheadAgitation & aggression, a defined indication with no approved therapyOwn by vacancy
ExpansionBroader behavioral disturbance
PlatformNon-sedating behavioral control, by mechanismOwn by differentiation
The partners

The people behind the model.

The partnership combines biotech company formation, CNS drug development, serotonergic and CNS pharmacology, venture investing, and regulatory execution.

Capital-efficient serial founders and proven biotech operators who hold their own capital in the vehicle, alongside investors.

Ken Belotsky
Ken BelotskyFounding Partner

Serial founder and venture investor; 25+ CNS and neuroscience deals and 3 exits.

LinkedIn
Shlomi Raz
Shlomi RazManaging Partner

Founder and CEO, Eleusis; President, Beckley Psytech; Goldman Sachs MD.

LinkedIn
Kostia Adamsky, PhD
Kostia Adamsky, PhDPartner, COO

Former VP Ops and co-CEO of multiple biopharmas; PhD, Weizmann Institute.

LinkedIn
Dan Jeffries, PhD
Dan Jeffries, PhDPartner

Scientist-founder at the intersection of chemistry and venture; former Roivant; PhD Vanderbilt, postdoc Harvard.

LinkedIn

Prior exits and licensing reflect companies with which team members were affiliated, not attributable to Palomar Labs or its current portfolio.

Scientific leadership
C. Anthony Altar, PhD
C. Anthony Altar, PhDHead of Scientific Advisory Board

Veteran of CNS drug discovery; leadership roles at Genentech, Regeneron, and Otsuka.

LinkedIn

Backed by a standing bench of scientific, clinical, and regulatory advisors.

3Former FDA Division of Neurology directors
8Full professors at leading universities
20+Scientific, clinical & regulatory advisors
~650Combined years of CNS experience

Advisor and combined-years figures are approximate, derived from public professional histories and rounded.

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