Capacity for a new peril.
Castra Risk is open to treaty and facultative participation across the four lines. Our cat methodology treats correlated autonomy failure as a single peril and models concentration accordingly. We disclose loss data, the concentration ladder, and the cat methodology to treaty counterparties quarterly. The submission package for facultative is identical to the broker package, abridged where the underlying placement has already been reviewed.
This page sets out the live capacity table, the indicative book concentration, the facultative-versus-treaty choice, and the treaty-underwriter desk. A facultative inquiry returns indication inside three business days. A treaty memo is delivered on signing a confidentiality undertaking.
What we write, and how it stacks.
| Line | Per-risk limit | Single-event aggregate | Annual GWP target | Cession share |
|---|---|---|---|---|
| Autonomous Systems | to $25M | $120M | $45M | 35-50% |
| AI Agent E&O | to $15M | $90M | $55M | 30-45% |
| Model Performance Warranty | to $10M | $50M | $22M | 40-55% |
| Regulatory Defense | to $20M | $70M | $28M | 35-50% |
| Tower (all four) | to $50M | $240M | $150M | 35-50% |
Sector × geography, against a ceiling.
| Sector × Geography | Americas | EMEA | APAC | Other | Total |
|---|---|---|---|---|---|
| Industrial & Robotics | 7.2 | 5.4 | 3.8 | 1.8 | 18.2 |
| Financial Services | 6.5 | 4.0 | 3.2 | 1.1 | 14.8 |
| Healthcare & Life Sciences | 5.6 | 4.2 | 2.1 | 0.6 | 12.5 |
| Logistics & Mobility | 4.9 | 3.4 | 2.7 | 0.5 | 11.5 |
| Defense & Dual-Use | 5.9 | 3.1 | 1.6 | 0.4 | 11.0 |
| Public Sector | 4.3 | 3.0 | 1.5 | 0.3 | 9.1 |
| Enterprise SaaS | 3.7 | 2.6 | 2.0 | 0.6 | 8.9 |
| Legal & Compliance | 4.6 | 3.4 | 1.5 | 0.5 | 10.0 |
| Total | 42.7 | 29.1 | 18.4 | 5.8 | 100.0 |
Facultative or treaty.
Risk-by-risk, against a single placement.
Facultative participation is open across all four lines. We share the underlying broker submission, the action-audit sample, the eval set identifier, and the bind-ready terms. A facultative cession answers within three business days. Documentation is on the LMA 5396 or a Castra fac slip; counterparty's preferred form on request.
This is the right mode for a reinsurer evaluating a specific risk — a counter-UAS placement, a clinical decision agent, a structured-output warranty — or testing pricing against its own model before treaty participation.
- CyclePer-placement, ad hoc
- Indication SLA3 business days
- Cession share20-90%
- Brokerage2.5-5.0%
- ReportingAt cession + at notice
- FormLMA 5396 or Castra slip
- SettlementMonthly
Pro-rata or excess, against a programme.
Castra runs a single annual treaty cycle commencing 1 April. Pro-rata and excess of loss are both available. Treaty counterparties receive the full disclosure pack quarterly: loss runs, concentration analytics, the cat methodology and its inputs, large-loss bordereaux, and the underwriting authority limits delegated to each producing broker.
This is the right mode for a reinsurer building book-share against the line or absorbing volatility across an annual portfolio. Profit-share, sliding-scale, and aggregate-stop are all available structures. Quote on request.
- Cycle1 April annual
- DisclosureQuarterly pack
- Cession share5-40% per layer
- StructuresQS · Surplus · XL
- BrokerageAs negotiated
- ReportingMonthly bordereau + quarterly
- SettlementQuarterly