Over 10 years deploying capital in the insurance capital markets I’ve found that most coverage rarely goes beyond surface-level headlines, outcomes, and broad narratives. 

This newsletter takes a different approach - a perspective from inside the market - the pricing cycles, the capital flows, what’s moving markets, and what’s behind the headlines.

A friend who used to run an insurance company sent me a headline last week. “Blackstone wants into Lloyd's with $2 billion of premium.”¹

To regular readers this shouldn't come as too much of a surprise. The largest alternative asset managers have spent the last 10 years moving into life insurance - buying annuity writers and managing their assets (see Issue 2 and Issue 3). Now they're moving into property and casualty, and Lloyd's has become the front door.

Blackstone already backs three Lloyd's syndicates: two with AIG and one with Fidelis.² Oaktree backs one with Allianz. The trade press is tracking another 8-10 in the pipeline.³

The Aon deal would be Blackstone's fourth syndicate, and the most aggressive version to date - there would be no insurer sponsoring it and no underwriting team - it would simply take a slice of a broker's order flow.

This issue of Hard Market dives into that deal and gives my take on the two questions that will decide whether or not this works. They turn out to be the same two questions that decide whether any insurance investment works.

Aon, one of the two largest reinsurance brokers in the world, has been in talks with Blackstone to set up a Lloyd's syndicate that would take a small slice of the reinsurance treaties Aon places in the market.⁴ (A treaty is reinsurance of a whole book of an insurer's business, rather than a single risk.)

Reinsurance is placed by subscription. A “lead” reinsurer prices the program, negotiates the wording and agrees the claims. Other reinsurers then “follow” by taking a share on the lead's terms.

The Blackstone syndicate would be a pure follower. It would have no underwriters of its own; it would simply take 3% of the catastrophe treaties Aon places and 5% of most of the rest, behind an approved list of leads and on their terms.⁴ ⁵

To get its clients to say yes, Aon would offer its clients the Blackstone-based slice at 5% below the lead's price.⁴ ⁵

Blackstone would make money the way any reinsurer does: it keeps whatever's left of the premium after claims and costs are paid, plus the “float” (the return on premiums and reserves while they sit waiting for claims to be paid).

The capital backing the risk would come from Blackstone's private equity funds, targeting mid-teens returns.¹

Strip out the jargon and what you have is a broker packaging its order flow into an index and selling units to a private equity firm.

Unsurprisingly, it's caused a fuss.

To you and me, it's the passive vs. active investing argument from the equity markets, ten years later. Who remembers Bernstein's 2016 note, “Why Passive Investing Is Worse Than Marxism”?⁷

Swap analysts for underwriters and Blackstone is being accused, as Berkshire Hathaway was in 2013, of “piggy-backing off the expertise of Lloyd's”.⁸

Lloyd's hasn't yet ruled on whether the deal can go ahead. Aon is aiming to unveil it in mid-October.⁵

Let's get into it…

In an equity index fund, companies don't choose which fund buys their shares. In reinsurance, buyers choose where their risk is placed. Facilities like this run on client consent: each Aon client will have to decide whether the Blackstone syndicate goes on their program.

So the question becomes: which buyers say yes to Blackstone holding their risk?

A buyer with a well-priced, oversubscribed program and reinsurers it wants to look after has little reason to hand 5% of it to a vehicle with no underwriters and no track record, whatever the discount. (A 5% discount on a 5% slice is a quarter of a point off the whole program.) Good buyers aren't optimizing for price - they want stable counterparties they know will still be there to take their risk after a loss.

A price-driven buyer, or anyone with a program the market is lukewarm on, is much more likely to take the 5% discount.

So Aon's index will tilt toward the business nobody else wants... and it will tilt hardest in a soft market, when other follow capacity is also discounting and an extra 5% only matters on the programs nobody else wants.

That is what getting selected against looks like. The buyers pick the reinsurer, one program at a time, and the buyers with the best programs have the least reason to pick this one.

On the surface the Blackstone portfolio looks like an index of Aon's flow. What it actually indexes is the buyers who are optimizing for price.

Aon has tried to turn its broking flow into an investment product three times before. Each time an insurer's balance sheet took the risk and, where the terms were reported, the insurers paid Aon for the access.⁸ ⁹ ¹⁰

Why would an insurer pay a broker? Because a guaranteed slice of a broker's whole book is cheap to run: no sales force, no deal-by-deal negotiation, a spread across every class and region. A few points of extra commission looked cheaper than the underwriting operation it replaced.¹¹ Index-fund logic: accept the market's average result, and win on cost.

Two things are new this time:

Either Aon will fund the discount out of its own brokerage, to make its broking cheaper than its rivals', or Blackstone will fund it, to buy the flow. We don't know which... yet. But on much of the book Aon's brokerage is only a point or two of premium. A 5% discount is bigger than Aon's whole fee on that business, so on that business it's hard to see anyone but Blackstone paying.

If Blackstone is paying, the arithmetic is simple: if claims eat 60 cents of every premium dollar, charging 5% less turns that into 63 cents - about three points of margin gone before any other cost, in exchange for not having to run an underwriting operation. Easy to run in a hard market, harder in a soft one…

…and we know how these facilities behave through a cycle. When the market softened last time and Lloyd's ran at a loss, the carriers on Aon's 2016 facility cut the fees they were paying Aon, and some walked away.¹² When the market hardened again, the facility grew several times over and new capital providers queued up to get in.¹³ ¹⁴

Follow capacity shrinks when the market softens and floods back when it hardens. The Blackstone vehicle is launching as pricing falls.

On the surface, this looks like an innovative, capital-efficient way for Blackstone to access a diversified book of risk. What it actually is: an old structure with new money, built to get capital into the market fast when pricing is good, launching just as pricing worsens.

Insurance Insider reports 8-10 more of these vehicles in the pipeline, exactly as pricing is falling.³ Those are sponsored by insurers reinsuring their own books. If Lloyd's lets a broker sponsor a syndicate that follows the broker's own placements at a discount and employs no underwriters, every other broker will want one…and every alternative asset manager suddenly has a template for reaching insurance risk without buying an insurer.⁴

Insurance risk doesn't trade on an exchange. It's placed by an intermediary who knows the client, priced by a lead who knows the risk, and consented to by a buyer who knows its own book better than either.

Every beta product in the insurance capital market, from a cat bond fund to a quota share to a follow syndicate, is an index that somebody assembled, and that somebody always knows more about the risk than the capital does.

Which brings me back to the two questions…every insurance investment comes down to who is being selected against, and what happens to the return when the cycle turns.

This deal is pretty clear on both.

The Blackstone vehicle is expected to be unveiled in mid-October. Here's what I'll be looking out for:

The standing invitation holds. If you've been sitting on a question - about a product, a structure, an idea - send it over.

Until then.

Charlie Evans, CAIA
Chief Investment Officer, Zephyros Investments

¹ Financial Times, September 2026, via Nexus - up to $2bn of premium a year, capital from Blackstone's private equity strategies, mid-teens target return. https://www.connectwithnexus.co.uk/blog/why-blackstones-latest-plans-at-lloyds-of-london-have-sparked-a-firestorm

² Blackstone's three existing Lloyd's syndicates: AIG's 2478 (Reinsurance News, December 2024), AIG-Amwins 2479 (Artemis, December 2025) and The Fidelis Partnership's 2126 (Artemis, October 2025). https://www.reinsurancene.ws/aig-leads-launch-of-new-reinsurance-syndicate-at-lloyds/ · https://www.artemis.bm/news/aig-sets-up-another-sidecar-style-syndicate-at-lloyds-with-blackstone-amwins-ai-in-the-mix/ · https://www.artemis.bm/news/blackstone-to-fund-new-fidelis-partnership-syndicate-2126-at-lloyds-via-london-bridge-2/

³ Insurance Insider, 8 September 2026 - 8-10 further vehicles in the pipeline; cat pricing down by up to 25% at the mid-year renewals. https://www.portal.insuranceinsider.com/article/2gv92j3c9mv3ytt4opog0/events/monte-carlo-hub-2026/reinsurance-start-ups-the-bermuda-desert-and-the-lloyds-hothouse

⁴ Insurance Insider, 6 and 8 September 2026 - the proposed syndicate; 3% and 5% lines behind approved leads; three-year capacity at a 5% discount to lead terms; Andy Marcell's remarks. Aon and Blackstone declined to comment. https://www.portal.insuranceinsider.com/article/2guz03f4haqnqbay8jegx/events/monte-carlo-hub-2026/aon-and-blackstone-working-on-reinsurance-syndicate · https://www.portal.insuranceinsider.com/article/2gvaetvghfa1f85evlds1/events/monte-carlo-hub-2026/aon-blackstone-the-lightning-rod-for-the-private-credit-question

⁵ The Insurer, 11 September 2026 - roughly $500m of capital at full take-up; Lloyd's executive review not yet begun; mid-October unveiling targeted. https://www.theinsurer.com/ti/news/lloyds-yet-to-begin-executive-review-of-aons-500-million-cortina-vehicle-2026-09-11/

⁶ The Insurer, 18 September 2026, and Insurance Insider's Monte Carlo wrap-up, 9 September 2026 - the objections from reinsurers and rival brokers. https://www.theinsurer.com/ti/news/aon-backed-cortina-faces-market-criticism-2026-09-18/ · https://www.portal.insuranceinsider.com/article/2gvgrlksxsjub9k3ld5vl/events/monte-carlo-hub-2026/monte-carlo-wrap-up-essential-news-dispatches-from-the-rendez-vous

⁷ Bernstein Research, August 2016, “The Silent Road to Serfdom: Why Passive Investing Is Worse Than Marxism”, via CNBC. https://www.cnbc.com/2016/08/24/passive-investing-is-worse-than-marxism-bernstein-strategist-claims.html

⁸ Business Insurance, March 2013 - the Aon-Berkshire Hathaway sidecar, a 7.5% follow line on Aon's Lloyd's placements; Insurance Insider, 16 November 2015 - Lloyd's opposition and Luke Savage's “piggy-backing” remark. https://www.businessinsurance.com/article/20130324/NEWS04/303249978 · https://www.portal.insuranceinsider.com/article/2876fnf4db62x2q8tlsn2/lloyds-reverses-course-on-major-facilities

⁹ Aon Client Treaty at launch - a 20% pre-placed line led by XL Catlin from 1 January 2016 (Business Insurance, November 2015), marketed to carriers with 7.5 points of enhanced commission (Insurance Insider, September 2019). https://www.businessinsurance.com/article/20151111/NEWS06/151119952/Aon-launches-new-initiative-with-Lloyds-of-London-syndicates-including-XL-Catli · https://www.portal.insuranceinsider.com/article/2876fhy9ajjsuvp8xglav/act-carriers-push-for-commission-cuts-as-pressure-grows-on-facilities

¹⁰ Insurance Insider, 19 November 2020 - Marilla: Swiss Re and PartnerRe taking 4% of Aon's cat excess-of-loss placements for 2.5 points of extra commission; Artemis, January 2021, on Marilla Re. https://www.portal.insuranceinsider.com/article/2876fnf4db62x2qzmncbf/aons-new-facility-is-a-bear-signal-on-the-post-covid-cat-reinsurance-market · https://www.artemis.bm/news/aon-marilla-re-collateralized-bermuda-catastrophe-reinsurance/

¹¹ Insurance Insider, 16 November 2015 - 5-6 points of enhanced commission “comfortably offset” by the lower cost of underwriting at portfolio level; the “zero cost” indexing insurer. https://www.portal.insuranceinsider.com/article/2876fnf4db62x2q8tlsn5/aons-epoch-making-initiatives

¹² Insurance Insider, 20 September 2019, 29 November 2019 and 5 March 2020 - Aon Client Treaty at circa $300m; carriers pushing for fee cuts as Lloyd's ran combined ratios of 114% (2017) and 104.5% (2018); Argo, CV Starr and Axis out; commission cut from 7.5 to around 6.25 points for 2020; Axa XL giving notice on its lead line. https://www.portal.insuranceinsider.com/article/2876fhy9ajjsuvp8xglav/act-carriers-push-for-commission-cuts-as-pressure-grows-on-facilities · https://www.portal.insuranceinsider.com/article/2876fhy9ajjsuvp5ki4zt/aon-client-treaty-renews-with-reduced-fees-and-line-sizes · https://www.portal.insuranceinsider.com/article/2876fhy9ajjsuvp26rl4y/axa-xl-set-to-end-aon-client-treaty-lead-participation

¹³ Insurance Insider, 21 July 2026 - Aon Client Treaty at a 28.5% line across roughly $5bn placed through Aon's London broking centre, about $1.4-1.5bn of premium, ten carriers. https://www.portal.insuranceinsider.com/article/2gnp6cprtdnckgmnzkwe9/all-topics/portfolio-underwriting/dozen-syndicates-behind-trio-of-cross-class-facilities-as-qbe-leads

¹⁴ The Insurer, January 2024 - line raised to 22.5% for 2024, Allied World and Canopius joining; Aon, 2 December 2024 - 28.5% for 2025, every carrier on a three-year letter of intent. https://www.theinsurer.com/ti/news/aon-client-treaty-adds-allied-world-canopius-for-24-and-boosts-line-size-to-22-5/ · https://aon.mediaroom.com/2024-12-02-Aon-Client-Treaty-Renews-with-Record-Setting-Support-for-2025