Everest Launches $500M Casualty Sidecar with Stone Point Capital

Everest Group and private equity firm Stone Point Capital have launched Annapurna Re Ltd, a new Bermuda-domiciled reinsurance sidecar that will absorb roughly $500 million in third-party capital to back U.S. casualty lines—a structure that's been conspicuously absent from the reinsurance capital menu since the property catastrophe boom of the early 2020s.

The vehicle is structured as a multi-year quota share arrangement, meaning it'll take a fixed percentage of losses and premiums across Everest's U.S. casualty book rather than writing individual policies. Stone Point is serving as the anchor investor, though neither firm disclosed the exact size of its commitment or the identities of other limited partners backing the structure.

What makes this worth watching: casualty reinsurance—think general liability, professional indemnity, workers' comp—doesn't typically attract sidecar capital. That money has historically chased short-tail catastrophe risk, where losses crystallize fast and capital can rotate quickly. Casualty losses, by contrast, can take years to develop. That Stone Point is willing to lock up LP capital in a multi-year casualty vehicle suggests the firm sees attractive risk-adjusted returns in lines that most alternative capital has ignored.

"The casualty market has been hardening since 2019, and that's created some of the most compelling economics we've seen in reinsurance in a decade," said Juan C. Andrade, president and CEO of Everest Group. "Annapurna allows us to add capacity where we see opportunity without permanently loading our balance sheet."

Sidecars exploded after Hurricane Katrina in 2005, giving insurers a way to temporarily boost capacity by sharing catastrophe risk with hedge funds, pensions, and other institutional investors. The appeal was obvious: defined duration, event-driven payouts, no messy loss development. You knew within months whether a hurricane season cost you money.

Casualty reinsurance doesn't work that way. Claims from a 2026 accident might not settle until 2032. That's an eternity for institutional capital that wants quarterly marks and clean exits. As a result, casualty sidecars have been oddities—occasional experiments rather than a standard tool.

But the casualty market has shifted hard. U.S. commercial general liability rates are up more than 40% since 2019, according to Marsh's Global Insurance Market Index. Professional liability lines—especially for financial institutions and tech companies—have seen even steeper increases. Social inflation, nuclear verdicts, and expanded liability theories have pushed loss costs higher, and reinsurers have responded by pulling back capacity or repricing aggressively.

That's created a gap. Primary insurers need more reinsurance protection, but traditional reinsurers are capacity-constrained. Enter alternative capital—if the returns justify the illiquidity. Stone Point clearly thinks they do. The firm has backed reinsurance vehicles before (it's an LP in several ILS funds and has invested in MGAs), but Annapurna marks one of its largest direct casualty reinsurance commitments to date, according to sources familiar with the structure.

Annapurna Re operates as a quota share participant in Everest's U.S. casualty book. That means it takes a fixed percentage—likely in the 10-25% range, though the companies didn't disclose the exact quota—of both premiums and losses across the covered lines.

Everest retains the first dollar of risk and continues to handle underwriting, claims, and all day-to-day operations. Annapurna is purely capital—it's not writing policies, negotiating treaties, or adjusting claims. It's a passive risk absorber, compensated through a share of underwriting profit and investment income on the float.

The vehicle is structured for multiple years, not a single underwriting cycle. That's critical. It gives Everest stability (the capital won't evaporate after one bad quarter) and aligns incentives (Stone Point can't just grab easy profits in year one and bail before long-tail losses emerge). It also means Stone Point and its LPs are betting on Everest's underwriting discipline over time, not just market conditions right now.

The Bermuda domicile matters too. It's not just about taxes (though those help). Bermuda's regulatory framework allows for faster capitalization and more flexible structures than onshore U.S. entities, and it's a jurisdiction institutional investors are comfortable with—critical when you're asking LPs to lock up capital in an illiquid reinsurance vehicle.

Stone Point Capital manages over $45 billion across financial services strategies, with a heavy tilt toward insurance and reinsurance. The firm has been methodically building exposure to reinsurance capital structures for years—it backed Kinsale Capital's IPO, invested in managing general agents like Ryan Specialty and Acrisure, and has been an LP in multiple ILS funds.

That a sophisticated private equity shop is willing to commit patient capital to casualty reinsurance tells you something about where the returns are. Casualty has been the sleeper story of the hardening market—overshadowed by property cat headlines but quietly delivering some of the best combined ratios in the industry.

Everest's own results bear this out. The company's casualty reinsurance segment delivered a combined ratio of 88.4% in 2025, down from 92.1% in 2023, according to its annual report. That improvement came even as the company grew gross written premiums in casualty lines by 18% year-over-year. Translation: pricing has improved faster than losses, and Everest is writing more of it.

But the casualty tailwind isn't infinite. Loss cost trends remain elevated—particularly in commercial auto and general liability—and there's debate about whether current pricing fully accounts for future social inflation and verdict inflation. Some actuaries argue that casualty reserves across the industry are still playing catch-up to the nuclear verdict environment that emerged in the late 2010s.

Annapurna's structure addresses some of that uncertainty. By taking a quota share across Everest's entire book rather than cherry-picking specific lines or geographies, the vehicle gets diversification. And by locking in a multi-year commitment, it avoids the adverse selection risk that comes when capital only shows up in good years and vanishes when losses materialize.

Still, the timing is aggressive. The casualty market has been hardening for seven years. That's a long run by historical standards. If loss costs flatten or pricing softens—say, if social inflation moderates or plaintiffs' attorneys hit a ceiling on verdict sizes—then returns could compress quickly. Stone Point is betting that won't happen, or that Everest's underwriting is good enough to navigate it if it does.

Annapurna isn't operating in a vacuum. Other reinsurers have been hunting for third-party capital to support casualty growth, though most have pursued different structures. RenaissanceRe launched a casualty-focused joint venture with DaVinci Re in 2024. Arch Capital has been building out casualty capacity through a mix of balance sheet growth and ILS issuance. And several MGAs have raised institutional capital to write casualty business on behalf of fronting carriers.

What's notable is that none of those structures look exactly like Annapurna. The sidecar format—simple, transparent, quota share-based—has been underused in casualty, despite its popularity in property cat. If Annapurna performs well, expect copycats. If it struggles, it'll confirm the skeptics' view that casualty reinsurance is too complex and slow-burning for alternative capital.

For Everest, Annapurna solves a specific problem: how to grow in attractive lines without permanently expanding the balance sheet or diluting existing shareholders. The company has been aggressively pivoting toward casualty and specialty lines since 2021, reducing its property cat exposure after years of losses.

That pivot has worked. Everest's return on equity hit 18.2% in 2025, up from 11.4% in 2022, driven largely by improved underwriting margins in casualty and specialty. But growing those lines requires capital, and raising equity or debt in today's environment would be expensive. A sidecar lets Everest add capacity without hitting the capital markets or absorbing 100% of the risk.

It's also a hedge against volatility. If casualty losses surprise to the upside—say, a wave of asbestos or PFAS claims hits the industry harder than expected—Annapurna absorbs its quota share of the pain. If losses come in better than expected, Everest still retains most of the upside while sharing some profit with its capital partners.

Other reinsurers are watching. If Everest can attract stable, long-term capital into casualty lines via a relatively simple structure, it changes the competitive calculus. Suddenly, the firms with the best third-party capital relationships have an advantage, not just the ones with the biggest balance sheets.

From Stone Point's perspective—and that of its limited partners—this is a bet on three things. First, that casualty pricing remains firm enough to generate mid-to-high teens returns even after accounting for loss development uncertainty. Second, that Everest's underwriting is disciplined enough to avoid the adverse selection and reserve blowups that have plagued casualty writers in past cycles. And third, that the illiquidity premium justifies locking up capital for multiple years in a structure with no secondary market.

That third point is the quiet risk. Private equity LPs are increasingly sensitive to liquidity—or the lack of it. Funds that locked up capital in 2021-2022 are now dealing with extended hold periods and sluggish exit markets. Adding a multi-year reinsurance sidecar to the mix means even less flexibility. Stone Point presumably compensated for this by pricing the deal attractively, but the LP base willing to accept another illiquid commitment is narrower than it was three years ago.

The reinsurance brokerage community has taken note. Several brokers told clients in recent weeks that casualty capacity remains tight despite improved pricing, and that structures like Annapurna could help alleviate some of the pressure—though it's unclear how much capital will ultimately flow into similar vehicles.

If Annapurna becomes a template, it could reshape how casualty reinsurance is capitalized. Instead of relying solely on balance sheet reinsurers or retrocessionaires, primary insurers might start building relationships with private equity shops and institutional investors directly, using sidecar structures as the bridge. That would blur the line between traditional reinsurance capital and alternative capital in ways the industry hasn't seen outside of property cat.

The broader question is whether other institutional investors follow Stone Point's lead. Casualty reinsurance has been off-limits for most alternative capital because the returns haven't justified the complexity and illiquidity. If Annapurna generates strong returns, that calculus changes. If it struggles with loss development or market volatility, it reinforces why casualty has stayed a balance-sheet game.

Either way, the structure itself is a signal: the wall between traditional reinsurance and alternative capital is eroding, and casualty lines are the next frontier.

One scenario worth gaming out: what if casualty losses come in materially better than expected over the next three years? Say social inflation moderates, nuclear verdicts plateau, and loss cost trends flatten. Pricing stays firm because capacity remains tight, and underwriting margins expand further.

In that world, Annapurna's investors make strong returns, and Stone Point looks prescient. Other PE shops launch copycat vehicles, and casualty sidecars become a standard capital structure within 18 months. Everest benefits from the additional capacity without giving up much economic upside, and the company doubles down by launching additional sidecars for other lines.

Now flip it: what if casualty losses surprise to the upside? Maybe PFAS litigation metastasizes faster than expected, or a series of mega-verdicts in commercial auto push loss ratios higher. Or—more insidiously—reserves from prior years prove inadequate, and adverse development eats into current-year margins.

In that scenario, Annapurna absorbs its quota share of the pain, which is exactly what it was designed to do. But the optics matter. If losses materialize quickly, Stone Point's LPs might question the wisdom of locking up capital in a structure with no exit. If losses develop slowly over years, the vehicle just becomes a drag on returns—not catastrophic, but not compelling either.

There's a quieter risk embedded in any quota share structure: what if the ceding company subtly shifts its mix toward riskier business once the sidecar is in place? Everest has every incentive to maintain underwriting discipline—its reputation and long-term profitability depend on it. But the temptation exists: if you're sharing losses with a third party, why not take a few more swings at marginally attractive risks?

Stone Point presumably negotiated controls to prevent this—annual underwriting audits, caps on certain line-of-business concentrations, veto rights on major underwriting changes. But those protections are only as good as the information flow and the contractual language. If Everest's casualty mix drifts in ways that aren't immediately visible in quarterly data, Annapurna could end up with a worse book than its investors expected.

Strip away the specifics, and Annapurna is a test case for whether institutional capital can stomach long-tail risk in exchange for illiquidity premiums and diversification. That has implications far beyond reinsurance.

If the answer is yes—if pension funds, sovereign wealth funds, and private equity shops can earn attractive returns in casualty reinsurance without the daily mark-to-market volatility of public equities or the concentration risk of direct private equity—then you're looking at a structural shift in how long-tail insurance risk gets capitalized.

If the answer is no—if the complexity, loss development uncertainty, and illiquidity aren't worth the returns—then casualty reinsurance stays a balance-sheet business, and structures like Annapurna remain niche experiments rather than a scalable model.

The next 18 months will tell the story. By mid-2027, Annapurna will have at least one full underwriting year of data, and the market will have a clearer sense of whether casualty pricing is holding or softening. If the vehicle is performing well and Stone Point is raising a successor fund, expect the floodgates to open. If it's quietly being wound down, expect the skeptics to say they knew it all along.