Sphère Capital builds and backs ventures at the intersection of capital markets, artificial intelligence, and structural transformation — where deep expertise creates asymmetric returns.
Alexia — Founder, Sphère Capital
20+
Years in capital markets
€4Bn
AuM structured
3
Active ventures
5K+
Counterparties managed
Founder
Alexia
Founder & Managing Partner
Former Global Head of Counterparty Credit Risk at a Tier 1 global investment bank. ECB liaison. Crisis manager across COVID, Russia/Ukraine, and commodities shocks. Ultra-endurance athlete. Law student. The kind of person who builds because standing still isn't an option.
Capital MarketsAI & RiskUltra RunningLawPhilosophy
Investment Thesis
We back what we understand deeply.
Sphère Capital focuses on ventures where regulatory complexity, data scarcity, and AI convergence create barriers that most investors cannot evaluate — and most operators cannot navigate. We can.
Our edge is pattern recognition built over two decades at the heart of global risk infrastructure.
20 years at the heart of global finance
A career built at the frontier
London · Early career
Equity Derivatives Trader
JP Morgan
Trading equity derivatives in one of the world's most demanding dealing rooms. Where conviction meets consequence.
Paris · Global mandate
Global Head of Prime Solutions
Tier 1 Investment Bank
€650M revenue business. Structured a landmark private debt partnership from zero to €4Bn AuM in 18 months.
Paris · 2016 – 2024
Global Head of CCR & Senior Advisor
CIB · McKinsey partnership
60-person global team. 5,000+ counterparties. Primary ECB liaison through COVID, Russia/Ukraine, and commodities crises. Led a €150M transformation programme.
Ventures & Portfolio
Three bets on the future of markets
Built from the inside. Each venture addresses a structural gap identified through two decades operating at the frontier of risk and regulation.
Risk Intelligence · Seed
Aspen FTM
AI agent platform for counterparty credit risk in capital markets. Built for practitioners, by practitioners.
AI Agentification · Early stage
NEXARA
Operating entity housing Dealium and SDLC Agent — two AI-native platforms for financial and tech markets.
M&A Marketplace · Pre-launch
Dealium
The missing infrastructure for SME transactions under €5M EBITDA — transparent, fast, trusted.
"The same discipline that carries you through 220 kilometres of desert applies when a €4Bn counterparty defaults at 2am. You train for both."
Portfolio · 2 ventures
Built from the inside out.
Each venture was born from a gap identified through two decades at the frontier of global risk, regulation, and technology. Not market research — lived experience. Every problem described below was encountered firsthand.
RAID is an AI-native intelligence layer that sits on top of existing bank systems — transforming counterparty credit risk and Prime Brokerage monitoring from periodic and reactive to continuous, predictive, and agent-augmented. No system replacement. Deployed via Agent Adaptors directly onto a bank's existing tech stack.
Archegos ($10B+), Nickel squeeze, UK LDI crisis, SVB — every event exposed the same blind spots: stale data, no aggregation, reactive processes.
03
Regulatory tsunami
ECB supervisory priority through 2026. BCBS CCR Guidelines (Dec 2024). SA-CCR mandatory globally. Regulators now expect continuous intraday monitoring.
04
The system gap
Banks still rely on 50–100 disconnected systems, overnight batch runs, manual credit reviews once a year. Risk officers spend more time fixing data than managing risk.
The transformation RAID delivers
Periodic
↓
Continuous
Reactive
↓
Predictive & proactive
Manual
↓
Agent-augmented
What RAID delivers
—Specialized AI agents monitor portfolio concentrations, exposures (MTM, PFE, SA-CCR EAD), limit breaches, margin calls, and external news signals simultaneously
—Universal Data Adapter ingests any system (Murex, Calypso, Numerix, data lakes) via AI schema discovery — no replacement, rapid onboarding
—On-prem or cloud, zero data egress, RBAC rights management, human-in-the-loop approvals
Stage & roadmap
Targeting first client implementation Summer 2026. Currently seeking implementation partner. AWS partnership in discussion.
Target clients
Tier 1 banks, CCR desks, prime brokerage operations, clearing houses, regulators, hedge funds with structured exposure.
Founding edge
Primary ECB liaison through three systemic crises. Global CCR mandate for 8 years. 50+ years combined expertise in CCR, prime brokerage, and AI engineering.
Deployment
SaaS or on-prem/cloud. Docker/K8s. Zero data egress. Fully auditable. DORA compliant from day one.
02 / 02
NEXARA
AI Agentification for regulated industries
Early StageAI PlatformsFintechDev AccelerationM&A
Product 01 · M&A Marketplace
Dealium
The infrastructure the SME M&A market was never given.
Transactions under €5M EBITDA still rely on informal networks, asymmetric information, and manual processes. No structured intake. No transparency. No trusted infrastructure.
—Structured deal flow for buyers, sellers, and advisors
Delivery infrastructure has transformed. The upstream problem hasn't. Business intent still fails to translate into engineering-ready requirements — causing 40% of all delivery rework.
—Normalises any input (email, deck, notes, screenshots) into canonical requirements with full provenance
—Finance-aware PO questions surface every gap before engineering begins
—Human-in-the-loop at every gate — AI drafts, humans decide, every approval logged
—Full traceability: every story links back to a functional requirement
The SDLC translation wall — how it breaks
00
Unstructured input
Email, deck, notes, transcript, screenshot
01
Normalise
Canonical source with provenance
02
Interrogate
Finance-aware PO questions
03
Iterate
Human approves, AI re-generates
04
Auditable output
BRD · Epics · Stories · Traceability proof
—AI interrogates — it does not assume. Every gap, contradiction, and missing decision is surfaced as an explicit PO question before any BRD is generated
—No artifact is promoted without a named human approval. Every promotion event is logged, versioned, attributable
—Hallucination risk bounded by design. Traceability is not a feature — it is the foundation
Stage
Early stage. Active co-build discussions with strategic partners in financial services.
Target clients
Mid to large financial institutions, regulated tech companies, professional services firms with complex delivery programmes.
Why now
Engineering transformation has outpaced the upstream process that feeds it. The better the pipeline, the worse the waste when requirements fail.
"Interested in partnering, investing, or building together?"
Advisory & Board Mandates
Senior advisory for institutions that cannot afford to get it wrong.
Twenty years navigating the most complex intersections of capital markets, systemic risk, and regulatory architecture. Available for a select number of board and advisory mandates where depth of expertise, independence of judgment, and institutional credibility are non-negotiable.
Former Global Head of Counterparty Credit Risk — Tier 1 global investment bank
Primary ECB liaison through COVID, Russia/Ukraine, and commodities crises
€150M transformation programme — with McKinsey
Private debt structuring: €0 to €4Bn AuM in 18 months
L2, Paris 1 Panthéon-Sorbonne · DU Criminology, Paris 8
Core expertise — years of practice
Counterparty Credit Risk20+
ECB / Regulatory Affairs8
Prime Brokerage & Structured Products15+
AI & Technology Transformation5
Crisis Management20+
Capital Raising & Structuring10+
Available for a strictly limited number of concurrent mandates. Engagements are selected on the basis of strategic fit, institutional ambition, and genuine value-add potential.
Mandate type 01
Independent Board Member
NED / Board Director with deep risk, regulatory, and capital markets expertise. Brings an institutional perspective and regulatory credibility that most boards cannot access internally.
Mandate type 02
Strategic Advisor
Long-form strategic advisory on risk architecture, regulatory positioning, AI transformation, and capital markets strategy. Engaged as a thinking partner at the executive level.
Mandate type 03
Interim CRO
Senior interim risk leadership for institutions in transition — restructuring, regulatory remediation, crisis response, or pre-IPO governance buildout.
Mandate type 04
Risk & AI Committee
Board-level or executive committee membership for institutions building AI governance, model risk frameworks, or risk infrastructure at scale in regulated environments.
What I bring to the table
Three layers of value. Delivered as one.
Most senior advisors bring one thing: a network, a perspective, or a technical skill. The value here sits at the intersection of all three — and has been stress-tested at the highest institutional level.
01
Regulatory depth
ECB · EMIR · Basel · SA-CCR · FRTB · DORA
Eight years as primary ECB liaison. Direct experience navigating supervisory reviews, stress tests, and crisis-driven regulatory scrutiny at systemic scale.
—Regulatory examination preparation and management
Built and led a global CCR function across 5,000+ counterparties through three systemic crises simultaneously. Pattern recognition that only comes from operating at the frontier under real pressure.
—Counterparty credit risk framework design and review
—Wrong-way risk, concentration risk, and tail risk governance
—Crisis management protocols and escalation architecture
—Prime brokerage risk and margin framework advisory
—Model risk governance and internal validation oversight
03
AI & transformation
Agentic AI · Risk Tech · SDLC · Regulatory AI
Founder of two AI-native platforms for regulated industries. Led a €150M technology transformation. Bridges the gap between AI capability and institutional risk reality.
—AI governance and model risk committee advisory
—Risk technology transformation and vendor selection
—Agentic AI deployment strategy for regulated environments
—Technology investment due diligence — risk & compliance lens
—Regulatory AI compliance (DORA, MiCA, EU AI Act)
Sectors & institutions
Where this expertise creates the most impact
Banks & capital markets
Tier 1 and Tier 2 banks, investment banks, prime brokers, and clearing houses navigating regulatory pressure, technology transformation, or risk infrastructure redesign.
—CCR and market risk governance
—ECB / FRB supervisory preparedness
—Basel IV & SA-CCR implementation
—Risk technology modernisation
Fintech & digital assets
Scale-ups and platforms entering regulated territory — building risk frameworks, preparing for regulatory dialogue, or seeking board-level credibility with institutional investors and regulators.
—MiCA compliance and regulatory strategy
—Risk framework design from first principles
—Board-level regulatory credibility
—Pre-IPO governance and risk committee setup
Asset management & funds
Alternative asset managers, hedge funds, and private debt platforms requiring counterparty risk expertise, prime brokerage advisory, or institutional-grade risk infrastructure.
—Prime brokerage and counterparty selection
—Counterparty risk governance for LPs
—Private debt structuring and partnership architecture
—Risk reporting and investor transparency
AI & regulated technology
Technology companies building in regulated environments who need a board member or advisor with both operational credibility in financial services and direct experience deploying AI at institutional scale.
—AI governance and model risk oversight
—Regulatory AI compliance (DORA, EU AI Act)
—Enterprise go-to-market in financial services
—Technical due diligence — risk & compliance lens
How an engagement works
Rigorous from the first conversation
01
Initial conversation
A direct conversation about the institution, the challenge, and whether genuine value-add is possible. No generic pitch. No retainer before alignment.
02
Scope & fit assessment
Clear definition of mandate scope, governance structure, and expected contribution. Engagements not taken where impact would be marginal.
03
Structured onboarding
Rapid institutional onboarding — risk framework review, regulatory context, team dynamics, strategic priorities. Contribution begins from day one.
04
Active mandate
Board attendance, committee participation, strategic advisory, regulatory preparation, or crisis support — depending on mandate type and institutional need.
"The institutions that get risk right treat it as a strategic capability — not a compliance function."
Two decades at the heart of global risk infrastructure produce something that cannot be replicated by curriculum or consultancy alone: the ability to see structural failure before it manifests, and the authority to act on it at board level. Every mandate draws on the same practice — built through three systemic crises, a €4Bn capital partnership, and the daily discipline of managing risk at the frontier of global markets.
Get in touch
Let's discuss.
Mandates are selected on the basis of genuine fit — for both sides. If the challenge is real and the ambition is there, the conversation is worth having.
Mandate types
Independent Board Director · Strategic Advisory · Interim CRO · Risk & AI Committee
Sectors
Capital Markets · Fintech · Asset Management · Regulated AI & Technology
Contact
alexia@sphere-capital.com
Contact
Every serious conversation starts simply.
Whether you are exploring a partnership, an advisory mandate, an investment conversation, or a co-build opportunity — write directly. Responses are personal and considered. There is no assistant, no CRM pipeline, no auto-reply.
Your message goes directly to Alexia. No intermediary. Responses within 48 hours on business days.
Direct contact
Prefer to write directly?
Email
alexia@sphere-capital.com
For all enquiries — advisory, ventures, investment
Location
Paris, France
Available internationally for board mandates and strategic engagements
LinkedIn
Alexia Weiller
For professional network and public announcements
What to expect
Advisory & board mandate enquiries — screened for fit before any further discussion
Venture partnerships (FTM, NEXARA, Dealium) — reviewed with founding team within 5 business days
Investment enquiries — handled confidentially, initial response by email
All other enquiries — acknowledged and responded to personally
"The right conversation, with the right person, at the right moment — that is how things actually get built."