Siro is a private origination firm for M&A, finance, ESG, and select energy, infrastructure, and industrial markets. We source the counterparties a mandate requires: founders and owner-operators, acquisition teams, capital partners, feedstock suppliers, and offtakers, before those opportunities are broadly marketed.
Modern data, mapping, and engagement infrastructure built to open senior decision-makers with the precision of a warm referral.
A deliberately small book of mandates each quarter, senior attention on every thesis and every introduction, and fees aligned to outcomes.
Work begins from a defined thesis and ends at a commercial outcome. If we don't believe a mandate can convert, we say so before it begins.
For specialist firms selling into markets where the decision-makers are senior, guarded, and rarely reached cold. We map who actually holds the pen, earn the first conversation, and turn an unfamiliar market into a working set of relationships.
For private equity firms, M&A advisors, family offices, and acquisition teams. Proprietary conversations with founder-led, privately held businesses inside a defined target box, delivered as dossier-backed owner introductions rather than marketed processes.
For operators and developers across the energy value chain, from waste-based feedstock companies to fuel producers and infrastructure projects. We originate the commercial relationships that move the business: collection and supply agreements, offtake counterparties, strategic partners, and investor readiness on the path to final investment decision. Projects rarely stall on technology; they stall on the commercial pieces.
Every mandate begins by solidifying the thesis: the target box, the counterparty group, the qualification bar, and what a successful outcome looks like, defined in writing before any work begins.
Mandate and universe mapping across the defined market: who matters, who decides, and the credible paths to each, scored so effort concentrates where quality lives.
Direct, discreet engagement with the mapped counterparties. Each conversation is handled with care from first contact through reply.
Every engaged counterparty is assessed against the mandate: context gathered, fit mapped, and quality graded before anything reaches your desk.
Introductions arrive warm and dossier-backed. Every outcome feeds back into the mandate, compounding the map, sharpening the thesis, and revealing where the next opportunity sits.
The firm suits teams pursuing consequential commercial relationships, and it is honest about who it doesn't.
A first conversation is thirty minutes: your thesis, our read on whether we can source against it, and an honest no if we can't.
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