Specialist · Montreal, QC
Seido Capital (anciennement Theodorus)
Early-stage life sciences, Belgian roots, Montreal base.
- Cheque
- $500k to $2.5M
- Role
- Can lead a round
- Pace
- Actively deploying
- Kind
- Specialist
- Based in
- Montreal, QC
- Vehicle size
- $45M
- Founded
- 2003
- Works in
- EN + FR
- Last deal seen
- February 2026
- Stages
- Pre-seed, Seed, Series A, Series B and later
Their thesis, in full
Seido Capital, formerly Belgium's Theodorus (founded 2003), rebranded and moved its HQ to Montreal, exiting European investing to focus on North American life sciences. It invests early stage (pre-seed to Series A) at the convergence of AI, software and biopharma, with first cheques of $0.5M to $2.5M. Fund V reached a first close of about $45M CAD in November 2024 toward a $70M target, with roughly 80% earmarked for Canadian companies and 20% for the US.
What they bring past the cheque
- Twenty-year life sciences track record
- Transatlantic Belgium and Canada network
- AI-biopharma convergence expertise
- Lead capacity at seed
- Clinical development guidance
Questions they usually ask
Have an answer ready for each one before the first call.
- What is the next clinical or regulatory milestone, and how much capital does it require?
- How does AI or software give your therapeutic or diagnostic a durable edge?
- Who are the natural Series A co-investors for your indication?
Follow-on
Seido Capital reserves a meaningful share of Fund V for follow-on into its life sciences winners and syndicates Series A rounds with Canadian and US specialist investors. Follow-on conviction tracks clinical and regulatory milestones.
Who to talk to
- Olivier BelengerManaging Partner
- Theo RisopoulosGeneral Partner
- Patricia EscoffierPrincipal
- Gabrielle GirouardInvestment Analyst
- Alexy L. OuelletteVP Finance and Operations
- Charles PearsonCapital Formation Analyst
Portfolio
Names they back, most notable first.
- Kainova TherapeuticsSeries B · 2026
- Reverb TherapeuticsSeed · 2025
- Innospera PharmaSeed · 2025
- Antegrade MedicalSeed · 2025
- SimmunomePre-seed · 2023
Often in the same rounds
Investors seen alongside them in past rounds.
- Investissement Quebec
- Fonds d'investissement Eureka
- Amplitude Ventures
- Sectoral Asset Management
- Genesys Capital
- Desjardins Capital
- Anges Quebec
- CTI Life Sciences
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