Sun Life Financial and Wilton Re have announced a definitive agreement to establish Windsor Life Re, a new reinsurer domiciled in both the United States and Bermuda, designed to support the acquisition of in-force life and annuity blocks at a scale neither party could easily reach independently.
The structure has three components. Wilton Re will establish and manage Windsor Life Re, drawing on its 22-year track record of sourcing and executing in-force block acquisitions. SLC Management, Sun Life's global institutional alternatives asset manager with $316 billion (all figures in US dollars) in assets under management as of June 30, will serve as lead investment manager for Windsor Life Re's portfolio. The partnership is capitalised at approximately $900 million, with Sun Life and Wilton Re each contributing approximately one-third of the total equity - leaving a third from an undisclosed third-party capital source.
Windsor Life Re will initially reinsure from Wilton Re an in-force block of approximately $1.7 billion. Future business will be ceded on a quota share basis. At scale, Windsor Life Re is expected to hold approximately $10 billion in assets. The partnership is expected to launch in the first half of 2027, subject to regulatory approvals.
Jefferies acted as financial advisor and Sidley Austin as legal advisor to Sun Life. Ardea Partners and Wells Fargo served as financial advisors and Debevoise & Plimpton as legal advisor to Wilton Re.
The structure arrives at a moment when the supply of acquirable blocks and the demand for capital-efficient liability transfer are both elevated.
US retail annuity sales reached $464.1 billion in 2025, the fourth consecutive record year, according to LIMRA's US Individual Annuity Sales Survey. That volume of new business creates a corresponding pool of in-force blocks that carriers may seek to transfer as their capital management pressures accumulate over time. The US life and annuity reinsurance leverage ratio reached 328% at the end of 2024, up from approximately 200% a decade earlier, with ceded reserves doubling between 2016 and 2024, according to AM Best - evidence of how much of this liability is already moving through exactly the kind of structure Windsor Life Re is designed to provide.
Wilton Re is a well-positioned acquirer in this market. The company has completed 26 in-force life and annuity block transactions since its founding in 2004 and converted 28 legacy administration systems to its business process outsourcing platform over that period. Its block sourcing capability and specialised underwriting infrastructure are the liability-side assets Sun Life is accessing through the partnership.
SLC Management is the investment-side asset. Managing a combined portfolio of traditional and alternative fixed income alongside real estate and private credit across institutional mandates, it brings to Windsor Life Re the investment platform that determines how effectively a block reinsurer can generate spread on the liabilities it assumes. The asset-liability matching capability is what makes the economics of block acquisition work at scale - and it is what distinguishes an asset manager-backed reinsurer from a conventional one.
Windsor Life Re's Bermuda domicile places it within the jurisdiction that has absorbed the largest share of US ceded block volume and within a regulatory framework that has been evolving continuously since 2023.
The Bermuda Monetary Authority introduced the prior-approval requirement for new long-term block reinsurance transactions in January 2023, applying to all Class C, D and E life reinsurers. The BMA updated and clarified the scope of that requirement in April 2025, adding detail on asset modelling, documentation standards and reconciliation between ceding companies' total asset requirements and Bermuda's Economic Balance Sheet framework. A separate enhanced public disclosure regime took effect in January 2026. A 15% corporate tax, aligning Bermuda with the OECD's global minimum, also came into force this year.
The effect of those regulatory additions was visible in formation volumes: Bermuda saw 13 new commercial long-term reinsurer formations in 2024 and approximately 10 in 2025 - a decline from the pace of prior years that S&P Global Market Intelligence attributed directly to tightening regulatory requirements raising the compliance threshold for new entrants. Windsor Life Re is entering a jurisdiction that is more demanding to establish in than it was three years ago, and where the prior-approval process for the block transactions the vehicle is designed to execute requires detailed documentation of strategic rationale, solvency assessments and governance approvals on a transaction-by-transaction basis.
Tom Murphy, president of Sun Life Asset Management, said unlocking opportunities at the intersection of insurance and asset management is a key strategic goal for Sun Life, and that the partnership enhances scale and presence in insurance asset management while providing strategic access to permanent capital to accelerate SLC Management's growth as a global alternatives asset manager.
Dmitri Ponomarev, CEO of Wilton Re, said Windsor Life Re would support Wilton Re's strategic growth by broadening capital resources and enhancing capabilities in the in-force life insurance and annuity market.
The Windsor Life Re structure follows an established pattern that has reshaped the US life and annuity market over the past decade: an asset manager provides permanent capital to a reinsurer, which acquires blocks of in-force policies from carriers seeking balance sheet relief, with the asset manager earning investment management fees on the associated portfolio. Prismic Life Reinsurance, formed by Prudential and Warburg Pincus in late 2023, and Fortitude Re's $28 billion agreement with Lincoln National in November 2023 are recent examples of the model at work. Windsor Life Re's $10 billion asset target places it in the same tier as those vehicles - large enough to compete for meaningful block transactions but structured around a specific combination of origination capability and asset management depth rather than pure capital scale.
For life insurance advisers and brokers whose clients hold annuity contracts, the Windsor Life Re structure is a reminder that the carrier who issued a contract and the entity that ultimately holds the liability can diverge over the life of a long-duration product. Block transactions are disclosed, but the practical implications for policyholders - including who administers the contract, who responds to service requests, and under what regulatory framework the obligations are held - are rarely top of mind at the point of sale. That transparency question is worth raising with clients who ask about the long-term security of annuity guarantees, regardless of which carrier or reinsurer currently holds their contract.
