Capital Architecture Institute
Capital is abundant.
Structure is scarce.
The Capital Architecture Institute develops the methodology, tools, and practitioner network for designing layered capital structures across blended finance, private credit, special situations, and deep-tech mandates.
Why Capital Architecture
The binding constraint on capital deployment is not the supply of capital. It is the absence of replicable, standardised architecture.
Over USD 13 trillion sits in global private markets. Development finance mandates remain chronically underspent. Energy transition pipelines stall. Defense tech scale-ups fall between public grants and institutional debt markets. Deep tech companies outgrow venture capital before they reach bankable revenue.
In each case, the capital exists. The market failure is architectural — there is no systematic methodology that converts a financing need into a bankable, replicable capital structure. The Capital Architecture Framework is the response to that gap.
The architecture gap is not an emerging market problem. It is a structural problem that exists wherever conventional finance stops — and that is precisely where the most significant capital deployment opportunities are.
The Methodology
Seven stages. One lifecycle. From mandate diagnosis to institutional governance.
The Capital Architecture Framework organises capital architecture into a seven-stage lifecycle. Every stage produces a documented output that conditions the next. No stage may be skipped. The result is a bankable, replicable capital structure built on explicit design decisions — not precedent and intuition.
| Stage | Name | Governing Question |
|---|---|---|
| PRE | Mandate Readiness Assessment | Is this mandate architecturally viable before design resources are committed? |
| 1 | Mandate Cartography | What is the precise topology of the financing need — by type, risk, investor universe, and replication potential? |
| 2 | Tranche Architecture | What is the optimal capital stack — and how are creditor rights, enforcement, and distribution structured? |
| 3 | Risk Allocation Engineering | Which risk belongs in which tranche — and what quantitative outputs must the risk model produce? |
| 4 | Return Engineering | Can each capital class achieve its threshold return simultaneously, across the full lifecycle? |
| 5 | Replication Testing | Can this structure be templated — and does it survive late-cycle and regulatory stress? |
| POST | Lifecycle Governance | How does the architecture adapt over time — meeting institutional LP governance standards throughout deployment? |
What the CAI Does
Rigorous methodology. Practitioner network. Working tools.
Research
Working Paper 001 publishes the complete framework — seven stages, quantitative governance requirements, and a full regulatory mapping. All research is published under CC BY-NC 4.0. Free to read, cite, and apply.
Practitioner Network
A working group of practitioners, DFI officers, and institutional allocators across 14 countries. Quarterly roundtables. Biannual research workshops. Not a mailing list.
Academy
The Certificate in Capital Architecture — 12 weeks, six modules, full CAF methodology. For practitioners already in the room when structures are designed.
Next cohort: Q3 2026.
The Framework in Use
Applied across energy transition, defense technology, social infrastructure, and emerging market blended finance.
Energy Transition
German industrial decarbonisation. EUR 200m portfolio. KfW subordinated tranche as catalytic first-loss. Mobilisation multiplier 4.7x.
Defense & Dual-Use
European dual-use venture debt fund. EUR 100m. EDF and BMBF grants as synthetic first-loss. AIFMD II LO-AIF compliant.
Social Infrastructure
UK affordable housing portfolio. GBP 150m. Homes England viability gap funding. Pension senior tranche at 4–5.5% on 20-year tenor.
EM Blended Finance
Sub-Saharan renewable energy infrastructure. USD 120m. DFI first-loss. Luxembourg RAIF-SICAV vehicle. Mobilisation multiplier 3–5x.
All mandate descriptions are illustrative. Specific transactions are subject to confidentiality.
Origin and Independence
The CAF was extracted from practice and formalised. The CAI carries it forward.
Tobias Temmen is Managing Director of wait, what., a capital architecture platform based in Zurich, and the founding practitioner of the Capital Architecture Institute. He has spent over 20 years deploying capital across investment management, venture capital, private equity, and strategy consulting — deploying over EUR 1.5 billion across fund structures and capital markets mandates.
The CAI was established to take that methodology beyond the boundaries of a single firm — publishing it under CC BY-NC 4.0, subjecting it to academic scrutiny, and building the practitioner community that will extend and stress-test it.
In engagement with: OECD DAC · Convergence · IFC / World Bank · ILPA · Bank of England · European Defence Fund · KfW
The methodology is published.
The institution is open.
Download Working Paper 001
The complete framework — seven stages, five formal propositions, quantitative governance requirements. Free under CC BY-NC 4.0.
Download →Apply for the CCA
Certificate in Capital Architecture — 12 weeks, six modules. Next cohort Q3 2026.
Apply →Join the Network
Roundtables, research workshops, and working groups for practitioners at the frontier.
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