Achmea Reinsurance priced its fifth catastrophe bond in June 2026 and got a number few sponsors of non-peak perils see: a 3.75% spread on the upsized €100 million Windmill III Re 2026-1 notes, below the 4.25% floor of initial guidance, against a 2.58% expected loss (Artemis, June 2026).
The resulting 1.45x multiple undercut even what debut sponsors paid this spring.
Key Takeaways
- The book upsized by a third and cleared guidance cuts twice, from a €75 million target with 4.25% to 5.00% guidance, to €100 million priced at the bottom of a revised 3.75% to 4.25% range.
- The multiple fell 39% in two years on the same layer. Windmill III Re 2024-1 priced at 5.25% over a 2.19% expected loss for 2.40x; the 2026 notes cleared at 1.45x.
- Expected loss rose 18% between the two vintages, so investors are accepting more modelled risk for proportionally far less premium.
- 1.45x sits below the Q2 2026 market average of 2.53x and below the 2.13x a debut sponsor paid five weeks earlier on Woody Re 2026-1.
- Achmea has used an indemnity, ultimate-net-loss trigger on all five issuances, taking collateral extension risk onto the investor rather than accepting index basis risk on a book concentrated in one country.
What Priced, and How the Book Moved
Achmea Reinsurance Company N.V., the group reinsurer for the Dutch mutual, opened bookbuilding on Windmill III Re DAC (2026-1) with a €75 million target and guidance of 4.25% to 5.00% over a 2.58% expected loss. Gallagher Securities, sole structuring agent and bookrunner, cut guidance to 3.75% to 4.25% as the book filled, and the deal upsized by a third to €100 million while pricing at the bottom of the reduced range (Artemis, June 2026).
The Class A notes, issued through the Ireland-domiciled Windmill III Re DAC under Rule 144A, cede European windstorm and severe convective storm losses, including hail and tornado, on behalf of Achmea Schadeverzekeringen N.V. and N.V. Hagelunie (Reinsurance News, June 2026). Coverage runs from July 1, 2026 to June 30, 2030, attaching at €500 million and exhausting at €650 million, with RMS modelling the layer.
This is not a replacement. Windmill III Re 2024-1, also €100 million after its own upsize from a €75 million target, runs to June 2028, so Achmea now carries €200 million of capital-markets windstorm capacity concurrently for the first time (Artemis Deal Directory). Four years of loss experience and reporting discipline is what investors underwrite against here, rather than a blind debut.
The Multiple, and the Trigger That Earns It
Spread and expected loss in isolation understate the move. The ratio between them is the risk-adjusted price, and it compressed harder than either figure alone.
Windmill III Re 2024-1 priced at 5.25% over a 2.19% expected loss, a 2.40x multiple. The 2026 notes priced at 3.75% over 2.58%, a 1.45x multiple, a 39% drop on the identical €500 million to €650 million layer. The expected loss itself rose 18% between vintages, almost certainly on updated RMS exposure and inflation adjustments to insured values. More modelled risk, proportionally less premium.
| Metric | Windmill III Re 2024-1 | Windmill III Re 2026-1 | Woody Re 2026-1 (debut) | Q2 2026 Market Average |
|---|---|---|---|---|
| Size | €100M | €100M | N/A | N/A |
| Expected loss | 2.19% | 2.58% | 3.88% | N/A |
| Spread | 5.25% | 3.75% | 8.25% | 3.74% avg. over EL |
| Multiple | 2.40x | 1.45x | 2.13x | 2.53x |
That 1.45x also sits below the market. The Q2 2026 market-wide multiple fell to 2.53x, the first reading under 3.0x since 2021's 2.23x, on an average spread over expected loss of 3.74%, the lowest quarterly figure since the first quarter of 2023 and the first sub-4% quarter in twenty (Artemis Q2 2026 report). Woody Re 2026-1, a debut on Gallagher Re's Arthur Re platform five weeks earlier, cleared at 8.25% over a 3.88% expected loss for 2.13x. Gallagher Securities separately put overall cat bond pricing down more than 20% year over year as of March 2026, at a 2.29x market multiple (Artemis, March 2026).
The trigger is where the cedant pays for that price in something other than spread. All five Windmill issuances trigger on indemnity, ultimate net loss to Achmea Reinsurance on a per-occurrence basis, rather than on a PERILS-style industry index. Indemnity eliminates basis risk: whatever the book actually loses inside the layer is what recovers.
The cost lands on collateral mechanics. Ultimate net loss develops as claims are adjusted, so the notes carry extension provisions that can hold collateral past nominal maturity while a loss finalizes, and investors underwrite Achmea's claims administration rather than a published number. An index trigger reverses that trade, paying quickly off a fixed timetable while leaving a Netherlands-concentrated book exposed whenever its own loss ratio diverges from a pan-European average.
What a Four-Year Spread Locks In
A cat bond priced at 1.45x is cheap against the traditional alternative only if the comparison holds for four years, and the traditional market moved in the same direction this cycle.
Global property catastrophe rate-on-line fell 16% at the July 1, 2026 renewal on Guy Carpenter's benchmark index, the steepest annual decline since 2014 (Reinsurance News, July 2026). Non-loss-impacted US property retro fell 5% to 15% in the same cycle, and North American property catastrophe softened 20% to 25%. Retro got cheaper too.
The two channels differ in what they commit. Traditional retro reprices annually and carries counterparty credit risk against the panel writing the layer, but it can be walked down or restructured if the exposure profile shifts. The bond fixes the 3.75% spread and the €500 million to €650 million attachment for four years, fully collateralized with no reinsurer credit exposure, and forfeits any mid-term renegotiation if Achmea's loss experience or capital position changes.
Running €200 million concurrently doubles that commitment rather than rolling it. The position is a defensible bet that dedicated reinsurance capital stays at current levels and this channel stays the cheaper source of this specific layer through 2028, when the 2024 vintage matures. It is still a bet, made at the point in the cycle where the price of being wrong is lowest and the odds of being wrong are highest.
Further Reading
- Europe's Record EUR 2.19 Billion Hail Mark from PERILS
- First-Time Cat Bond Sponsors Price Near a 2x Multiple on Arthur Re
- Leadenhall's Tranquil Re and the Retro Cat Bond Multiple Compression Trade
- Zurich Ends a 13-Year Cat Bond Hiatus With Turicum Re
- Cat Bonds Hit $18B in H1 2026: What the Records Actually Mean
- Record $790 Billion Reinsurance Capital Rewrites Cedant Program Math
- Property Cat ROL Falls 16%: The Net Cost of Reinsurance in 2027 Primary Rates
Sources
- Artemis, “Achmea Secures One-Third Upsized €100m Windmill III Re 2026-1 Catastrophe Bond,” Artemis.bm, June 2026
- Artemis, “Achmea Raises Windmill III Re 2026-1 Cat Bond Target to €100m, Price Guidance Lowered,” Artemis.bm, June 2026
- Reinsurance News, “Achmea Reinsurance Secures €100m of European Windstorm & Severe Thunderstorm Retro With Latest Cat Bond,” Reinsurancene.ws, June 2026
- Artemis Deal Directory, “Windmill III Re DAC (2026-1),” Artemis.bm
- Artemis Deal Directory, “Windmill III Re DAC (2024-1),” Artemis.bm
- Artemis, Q2 2026 Catastrophe Bond & ILS Market Report, Artemis.bm, July 2026
- Reinsurance News, “Catastrophe Bond Issuance Exceeds $11.3bn in Record Second Quarter: Artemis,” Reinsurancene.ws, July 2026
- Reinsurance News, “Global Property Cat Rates Down 16% as Softening Extends into July Renewals: Guy Carpenter,” Reinsurancene.ws, July 2026
- Artemis, “Cat Bond Prices Drop 20%+ YoY, Investors Willing to Support Riskier Tranches: Gallagher Securities,” Artemis.bm, March 2026