Precision Oncology · mRNA · AI

Personalized
cancer vaccines
at software speed.

Elyra designs it, Provenance proves it.

Helixion Therapeutics builds personalized mRNA cancer vaccines that expand beyond conventional tumor-antigen discovery into tumor exclusive antigens most existing pipelines overlook. The field has largely converged on canonical, mutation-derived neoantigens: a narrow slice of what a tumor actually presents to the immune system. A substantial share of immune-visible epitopes arises from non-canonical, cryptic, and "dark matter" sources that standard neoantigen workflows are not built to find or routinely discard.

ELYRA: Helixion's proprietary AI platform ELYRA is designed to surface, score, and encode both conventional neo-epitopes and non-canonical cancer epitopes into patient-specific mRNA vaccine constructs. We believe this overlooked antigen space is where durable differentiation in personalized cancer vaccines will be won, and it is the core scientific wedge of the company.

PROVENANCE: Personalized therapeutics depend on an unbroken chain from patient sample to manufactured construct, and that chain is conventionally documented by paperwork and taken on faith. Helixion's proprietary chain of custody software PROVENANCE captures each design step and data handoff on a cryptographically verifiable chain of custody, making the underlying record independently auditable by third parties without taking the company's word for it. As personalized vaccines scale, we expect verifiable provenance to shift from a differentiator to a requirement.

Elyra Engine — Active

Cancer is personal.
Standard of care is not.

Tumors are genetically unique. Every cancer is a single disease. Personalized therapies have shown encouraging results but implementation remains limited by long personal development times and high cost.

01
The Gap
One-size-fits-all medicine fails most patients.
Standard-of-care response rates for advanced solid tumors range from roughly 30% to 80% depending on cancer type and line of therapy. The patients who don't respond run out of options fast.
02
The Signal
Personalized therapies work.
Personalized neoantigen vaccines and adoptive cell therapies have shown safety and encouraging clinical responses in published Phase 1/2 readouts across several solid tumor indications, including melanoma, glioblastoma, and pancreatic cancer.
03
The Bottleneck
Time, cost & flexibility.
Bespoke design and manufacturing takes 6 to 12 weeks per patient and runs over $100K per regimen. Established companies are set in their ways and bound to already generated clinical data.
AI allows for integration of prior clinical learnings into optimal epitope calling and vaccine design & enables rapid and cost-effective personalized vaccine design for every patient.

Meet Elyra.

DNA and RNA in. Vaccine blueprint out. In days. Cancer-agnostic by construction.

01

Built on twenty years of
clinical learnings.

Personalized cancer vaccines have been in human trials since the early 2000s. The field knows which features predict immunogenicity, which mutations get presented, and which cassette designs hold up in patients.

02

Expanded
epitope calling.

Elyra expands neoantigen calling well beyond conventional mutation-only pipelines, reaching into the dark epitope universe that current programs leave on the table. A wider target space means more candidates per patient and more shots at an immunogenic response.

03

Three founders,
expert depth where it matters.

AI does the work that used to need an 80-person department. Three founders steer. The result is a clinical-grade platform built and operated at software-team scale.

Why Now?

Three forces have converged to make this the right moment to build Helixion.

01
mRNA Is Proven
2B+
Doses delivered globally
COVID-19 validated mRNA at global scale. Regulatory frameworks exist. Manufacturing infrastructure is real. The platform works.
02
AI Has Crossed the Threshold
Days
Not months, to design
LLMs can now predict personal neoantigens with high accuracy. The design cost has collapsed. Elyra is possible today.
03
Clinical Signal Has Arrived
Early
First readouts in, the field is just opening
Personalized vaccines have moved from "interesting hypothesis" to "category with early clinical proof." The science is no longer in question. The race to get design right is wide open, and it is still day one.
The bottleneck is no longer science. It's execution — and that's what Helixion is built for.

This is already happening.

Built & Validated
Pipeline shipping
Built ✓
External benchmark validated
Validated ✓
Three USPTO provisionals filed
Filed ✓
In Flight
In silico head-to-head validation
In Progress
Wet-lab validation
In Progress
Seed close
Next

A clear path forward.

One integrated program. Platform built, validated, and taken into patients with discipline at every step.

Phase I
Now
Platform
  • Elyra validated end-to-end
  • Wet-lab proof-of-concept
Phase II
Next
Clinical
  • IND-enabling studies
  • First patient
Phase III
Then
Scale
  • Phase 1 study
  • Expanded indications
Built → Validated → Into Patients

A rapidly expanding,
underserved market.

Personalized Cancer Vaccine Market (USD Millions)
$350M
2025
$510M
2026
$740M
2027
$1.05B
2028
$1.4B
2029
$1.75B
2030
↑ 44–45% CAGR · 2025–2030
44–45%
CAGR · Fastest-growing biotech segment
$141B
mRNA Therapeutics market by 2030
Software
Economics · Pure computational design layer
98%
Of tumor antigens currently invisible to mutation-only programs

Proven operators.
Repeat founders.
Cross-border experts.

Sean Clark and Marc van der Chijs built Hut 8 together. Dr. Stefanie Mandl-Cashman, formerly CSO at PACT Pharma, brings the neoantigen science. Helixion Therapeutics is their next chapter.

Sean Clark
Sean Clark
Chief Executive Officer & Co-founder
Serial Founder · Public Markets Veteran. CEO of Hut 8 — raised $100M, led TSX public listing. CEO & Founder, First Block Capital — first regulated crypto firm in Canada. Founder, Shoes.com — pioneering Canadian e-commerce. Deep expertise in cross-border capital markets and technology commercialization.
Hut 8 CEOTSX ListingFirst Block CapitalShoes.com
Marc van der Chijs
Marc van der Chijs
Chief Operating Officer & Co-founder
Serial Entrepreneur · Asia & Crypto Pioneer. Co-founder Tudou.com — China's leading video platform, listed NASDAQ, sold to Alibaba. Co-founder Hut 8 Mining — largest Bitcoin miner in North America. 13 years of operational experience across Asia with deep international networks.
Tudou → AlibabaHut 8 Co-founderFirst Block Capital13 Yrs Asia
Dr. Stefanie Mandl-Cashman
Dr. Stefanie Mandl-Cashman
Chief Scientific Officer & Co-founder
Seasoned Biotech Executive · Cancer Immunotherapy. Former CSO at PACT Pharma (first-in-human personalized neoTCR-T cell therapy), CSO at Indapta Therapeutics (adoptive NK cell therapy), and Head of Research at Bavarian Nordic (poxvirus-based cancer vaccines). Co-senior author on two 2023 Nature publications defining the neoantigen-specific TCR-T cell field. PhD thesis on RNA virus-based cancer vaccines.
PACT CSO2× Nature25+ Yrs Cancer VaccinesIND Experience

Why we are
building this.

A founder's letter from Marc van der Chijs, Co-founder & Chief Operating Officer.

I've been thinking about longevity since at least 2017. Back then I wrote about it as an investor thesis, the idea that extending human healthspan would become one of the defining technological challenges of our generation. It was somewhat abstract at the time.

Then I lost two friends to cancer. That changed a lot for me, because something abstract suddenly became personal very fast.

When someone close to you dies from cancer, at some point, if you're the kind of person who builds things, you stop asking "why did this happen" and start asking "what is actually being done" and "where are the gaps." I started reading papers about cancer immunotherapy, personalized medicine, and neoantigen vaccines. And I found a gap that shouldn't be there.

The work

Personalized cancer vaccines have been in human trials for almost two decades. The clinical signal is real. Patients respond. The bottleneck is not the modality. The bottleneck is the design layer, and the field has been working around it rather than through it.

Sean Clark and I co-founded Helixion Therapeutics in Vancouver to attack that problem head-on. Sean has been my business partner for almost a decade. He's the co-founder of Nasdaq-listed Hut 8 and a TSX-listed ETF. He is a builder. Not a career academic, but someone with deep technical ability who can take a complex problem and ship a working solution. We complement each other well.

The defining moment came when Dr. Stefanie Mandl-Cashman joined us as CSO. Stefanie has spent more than 25 years in cancer immunotherapy and led research at three biotechs that took personalized therapies into patients. With her on the team, the scope of what we are building expanded. The personalized cancer vaccine field has been targeting a narrow slice of what the tumor actually presents to the immune system. Helixion is going after the rest of it. That is the design ceiling we are working to break.

The vision

A personalized cancer vaccine designed from the broadest target universe available, manufactured to the highest provenance standard, delivered at software speed. Every step cryptographically attested. The window is open. We are moving.

If any of this resonates, get in touch.

"Your immune system is designed to find and kill cancer cells. The question is: which mutations do you pick? I realised this is a computational problem — and that the current tools are not solving it well."

"The clinical signal for personalized cancer vaccines is real. Patients respond. The bottleneck is not the modality. It's the design layer."

"Mutation-derived neoantigens are about 2% of what the tumor actually presents. The other 98% is what we are building Elyra to reach."

Work with us

We are looking for computational biologists, immunologists, and bioinformatics engineers who want to work on a problem that matters.

See Open Roles

Build the AI that
defeats cancer.

We are assembling the team to take it into patients. If you have spent your career on neoantigen biology, HLA prediction, or clinical genomics pipelines, this is where that work matters most.

Mission
Patients with cancer are running out of time. So are we.
Day 1
Real science. No PowerPoint-stage startup.
Small team
Your name on the science, not buried in a department
Equity
Meaningful founder-level equity for early team members
Full-Time or Contract · Remote
Computational Immunologist

Push the scientific frontier of how the platform identifies and ranks tumor antigens. You will work directly on the models that decide what becomes a vaccine.

PhD or MSc in computational biology, bioinformatics, or immunoinformatics
Deep familiarity with neoantigen biology and HLA presentation
Strong Python and ML fluency
Experience taking research models to clinical-grade software a strong plus
Express Interest
Full-Time or Contract · Remote
Bioinformatics Engineer

Harden the production platform. You will take a validated pipeline from prototype to enterprise-grade, with the rigor and reliability that clinical genomics demands.

Strong Python and bash
Workflow orchestration experience
Linux and cloud compute fluency
Genomics or clinical-pipeline background preferred
Express Interest

We move fast, and we don't waste time. If none of these roles fit but you work in this space, reach out anyway.

sean@helixiontx.com

We are building the
intelligence layer
for cancer therapy.

Talk to us.
Investors · Partners · Scientific collaborators

Helixion is operating with discipline and moving with purpose. We work with partners who understand cancer drug development, value scientific rigor, and want to back a platform built for the long arc.

Investors
Healthcare-focused funds, family offices, and strategic investors at the intersection of AI, oncology, and personalized medicine.
Scientific collaborators
Researchers, clinicians, and institutions whose work overlaps with neoantigen biology and cancer immunotherapy.
Clinical partners
Clinical centers, KOLs, and translational programs interested in advancing personalized mRNA cancer vaccines.
Press & media
Journalists and analysts covering precision oncology, mRNA therapeutics, and AI in drug discovery.

Get in touch

Send us a note and we will respond directly.

Founder & CEO
Sean Clark
Location
Vancouver, BC · Canada