Arcus Advisory ILS Market Monitor
Arcus Advisory
ARCUS ADVISORY
Investment Advisory & Consulting
Weekly briefing on insurance-linked securities
week ending 23 August 2026
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ILS Market Monitor

Cat Bond Issuance YTD 2026
$18.9bn
Per Artemis deal directory; unchanged since mid-July, no new pricings
Outstanding Market
$65.6bn
Up from $61.3bn at YE 2025
ILS Fund Return, H1 2026
+4.05%
ILS Advisers Fund Index; July reading not yet published
Wildfire Cat Bonds YTD
$5.18bn
Nears 2025's full-year record of $5.55bn
This Week's Key Developments — across all tabs, week ending 23 August 2026
BriefingWillis Re agreed to acquire BMS Group's US reinsurance broking division, its first major deal since relaunch; Munich Re and Lloyd's moved to the top of AM Best's global reinsurer rankings.
Deal TrackerNo new deals priced since mid-July; 92 deals remain YTD 2026, with State Farm's $1.5bn Merna Re Enterprise II still the year's largest single tranche.
NatCat RatesAM Best warned competitive pressure will keep rising into 2027, even as it expects underwriting discipline to keep returns attractive; Guy Carpenter's Global Property Cat RoL Index still down 16% YTD through July renewals.
EventsCatIQ raised its estimate for the late-June/early-July Ontario & Quebec severe thunderstorm event 17.5% to C$439m; Allstate's cumulative pre-tax cat losses reached $2.402bn through July.
Hurricane TrackerTropical Storm Cristobal became the season's third named storm; still no hurricanes, and NOAA's below-normal forecast (75% probability) is unchanged.
Private ILSArtex Capital Solutions partnered with Enstar on structured exit options for trapped capital in ILS vehicles; Artex Axcell Re's 2026 private cat bond issuance has now topped $383m.
Watch ListThe Spokane wildfire claims data call report is now due imminently — Washington's OIC has committed to a first claims report by end of August.

ILS Fund Returns Since 2020

Annual returns 2020–2025; monthly detail plus a YTD 2026 aggregate bar (ILS Advisers Index)

Outstanding Cat Bond Market Size

$bn outstanding, period-end

Annual New Cat Bond Issuance

$bn issued, 144A + private

Cat Bond Issuance by Month — 2026 YTD

$bn issued per month, FX-converted to USD; all deal-directory listings (cat & non-cat ILS)
Bottom line: The ILS market remains at record scale even as reinsurance pricing keeps softening — cat bond issuance holds at $18.9bn+ YTD with the outstanding market at $65.6bn, and ILS fund performance is having its best year since the hard-market peak (+4.05% through H1). This week's news was more structural than pricing-driven: Willis Re's acquisition of BMS Group's US reinsurance broking arm marks the first major consolidation move since its 2024 relaunch, and Munich Re and Lloyd's moved to the top of AM Best's global reinsurer rankings. On losses, Washington's insurance regulator remains on track to publish its first Spokane wildfire claims report by end of August, still the loss event most likely to move the needle before the next refresh.

Cat Bond Issuance & Pricing

Total cat bond issuance remains at $18.9bn+ YTD per Artemis' live deal directory, with wildfire-exposed issuance holding at $5.183bn — still closing in on 2025's full-year wildfire record of $5.55bn. No new 144A deals have settled since the batch of five that closed in mid-July (Matterhorn Re 2026-3, 3264 Re 2026-1, Harbor Crest Re 2026-1, Artex Axcell Re FE0004, Seaside Re 2026-61), consistent with the market's typical late-summer lull ahead of the autumn pipeline. On the private side, Artex Axcell Re continues to be active: its 2026 private cat bond programme has now issued more than $383m across four series, and Artex's Faries noted publicly this month that today's ILS market is "significantly broader, more resilient" than in past cycles, even as complexity continues to rise for structurers and investors alike.

Reinsurance & Retrocession Market

The softening cycle that began at 1/1 (Guy Carpenter's Global Property Cat Rate-on-Line Index down 12% at Jan 1, Gallagher Re down 15%, Howden Re down 14.7%) has held through the July mid-year renewals at -16% YTD for Guy Carpenter's index — still the steepest annual decline since the late 1990s. There is no new renewal data this week (the next major reset point is 1 January), but AM Best used the quiet window to publish a forward look: it expects competitive pressure on reinsurers to keep rising into 2027 as record dedicated capital (~$660bn) and growing alternative capacity persist, though it believes underwriting discipline can keep returns attractive even as rates keep falling. Consistent with that theme, Willis Re's acquisition of BMS Group's US reinsurance broking division — its first major deal since relaunching as a WTW/Bain Capital joint venture in 2024 — adds a capital-markets capability the broker previously lacked, a sign that broker consolidation is accelerating alongside the reinsurer-side capital growth. Separately, Munich Re and Lloyd's moved to the top of AM Best's latest global reinsurer capital rankings.

Loss Events

The Spokane, Washington wildfires remain the loss event to track most closely — the three fires (together called the Complex Fire) have burned over 10,000 acres, destroyed more than 700 homes and forced roughly 65,000 evacuations, with AM Best and Gallagher Re both flagging a potential billion-dollar, possibly record, insured wildfire loss for the state. Washington's Office of the Insurance Commissioner has not yet published claims totals but remains on track for its first data-call report by end of August. Elsewhere, CatIQ raised its industry loss estimate for the late-June/early-July severe thunderstorm event across southern Ontario and Quebec by 17.5% to C$439m in its 45-day update, with the increase concentrated in commercial-lines claims growth. In the US, Allstate reported July catastrophe losses of $682m, lifting its cumulative pre-tax cat losses for the year to $2.402bn across 23 events, about 75% of which were wind and hail. On the broader hurricane outlook, NOAA's forecast is unchanged (below-normal season, 75% probability; 7–13 named storms, 2–6 hurricanes) with three named storms so far (Arthur, Bertha, Cristobal) and no hurricanes yet — see the Hurricane Tracker tab. See the Events tab for the full multi-year loss history.

ILS Fund Flows & Performance

H1 2026 ILS Advisers Fund Index performance holds at +4.05%, still a strong showing for the strategy class, though below 2023–2025's hard-market peak returns; July's monthly reading has not yet been published. Swiss Re Capital Markets' most recent secondary-market update (covering H1) showed TRACE trading activity of 806 transactions through June, up roughly 37.5% year-on-year, with May 2026 the most active secondary month since March 2020 — a sign investor engagement with the asset class remains elevated even as new-issue supply has paused for the summer.

Regulatory & Structural

Beazley partnered with Integral ILS to launch a new cyber ILS fund platform in Bermuda, another sign of capital-markets appetite extending beyond traditional property catastrophe risk. Artex Capital Solutions announced a partnership with legacy and run-off reinsurance specialist Enstar to introduce structured exit options embedded within Artex's ILS vehicles, aimed at solving trapped-capital issues that have historically frustrated investors in collateralized structures. And in broker M&A, Willis Re's purchase of BMS Re US (covering BMS Intermediaries Inc., BMS Capital Advisory LLC and BMS Re's US-focused London team, terms undisclosed and pending regulatory approval) is the most concrete sign yet that reinsurance broking consolidation is continuing alongside growth in capital-markets-adjacent capabilities.

2026 Loss Events to Date

Individually reported/estimated 2026 events. These do not sum to the ~$42bn H1 2026 global insured aggregate — the gap is unattributed attritional and international losses not broken out by event.

10 Largest Individual Loss Events Since 2020

Global, single-event insured losses (excludes full-year/half-year aggregates). Figures blend Swiss Re Institute, RMS, PERILS and CoreLogic estimates — sources vary in scope and timing, so treat as directional and verify before external distribution.

Loss Events Since 2020

Major natural catastrophe events and aggregate insured-loss figures, 2020 – August 2026, sourced primarily from Swiss Re Institute, RMS, PERILS, Munich Re, Aon, CatIQ and Gallagher Re sigma/cat reports. Aggregate full-year/half-year rows are shown alongside individual named events; sortable by date.

2026 Atlantic Hurricane Season Tracker

Open NOAA NHC Live Tracker ↗
Named Storms So Far
3
Arthur, Bertha, Cristobal
Hurricanes So Far
0
None yet this season
NOAA Full-Season Forecast
7–13
Named storms; 2–6 hurricanes, 0–2 major (Aug 6 update, unchanged)
Below-Normal Probability
75%
NOAA, driven by emerging El Niño

NOAA Seasonal Activity Probability

August 2026 update
Below-normal
75%
Near-normal
20%
Above-normal
5%

2026 Storms to Date

As named by NOAA / NHC
StormPeak ClassLandfall
ArthurTropical StormTexas coast
BerthaTropical StormSt. Bernard Parish, LA
CristobalTropical StormNo landfall — northern subtropical Atlantic, tracked toward Europe

The season's third named storm, Cristobal, formed over the northern subtropical Atlantic in mid-August with peak sustained winds of around 45 mph, tracking away from land toward the Azores and western Europe without a US or Caribbean landfall. A fourth system — provisionally watched for the name Dolly — was tracked off the coast of Africa in mid-August but lost organization amid strong wind shear linked to the strengthening El Niño and had not formed as of this update. NOAA's August 6 forecast update remains the most current outlook: 7–13 named storms, 2–6 hurricanes, and up to 2 major hurricanes for the full season, with a 75% probability of a below-normal season driven by El Niño conditions suppressing tropical cyclone formation and intensification across the basin. Despite the quiet storm count and zero hurricanes to date, Swiss Re's Monica Ningen has cautioned that an "on-trend" year can still produce roughly $148bn in industry insured losses, with a modeled 10% chance of a $320bn peak-loss year — a reminder that named-storm counts are a weak predictor of tail-risk outcomes for a reinsurance or ILS book.

Cat Bond Deal Tracker

Full year-to-date 2026 issuance list (January–July), per Artemis' cat bond deal directory — 92 deals priced across the period, unchanged since mid-July with no new pricings this week. Sizes are issued/target tranche size in original currency; "Undisclosed" cedents reflect deals where the sponsor was not named in the public record. Treat as directional — verify exact pricing dates before external distribution.

10 Largest Cat Bond Deals by Sponsor — 2026 YTD

Issued tranche size, $m equivalent (FX-converted where applicable); labelled by sponsor / cedent

Underlying NatCat Market Rates

Reinsurance rate-on-line indices, cat bond spread trends and broker/rating-agency commentary on where property catastrophe pricing sits in the cycle.

GC Global Prop Cat RoL, Jan 1 2026
-12%
Guy Carpenter, year-on-year
GC Global Prop Cat RoL, 2026 YTD
-16%
Through July renewals — steepest since late 1990s; unchanged this week
Swiss Re Cat Bond Index, H1 2026
+4.12%
SRGLTRR total return; spreads tightening
Gallagher Re Global Prop Cat RoL
-15%
Jan 1 2026 renewal

Guy Carpenter Global Property Cat RoL Index Since 2020

% change year-on-year at Jan 1 renewal 2020–2025; 2026 shown renewal-by-renewal (Jan 1 / Apr / mid-year)

Broker RoL Indices — Jan 1 2026 Renewal

Global property catastrophe, % change year-on-year
SourceMetricReadingPeriod
Guy CarpenterGlobal Property Cat RoL Index-12%Jan 1 2026 renewal
Guy CarpenterGlobal Property Cat RoL Index-16%2026 YTD, through July renewals
Gallagher ReGlobal Property Cat RoL Index-15%Jan 1 2026 renewal
Howden ReGlobal Property Cat RoL Index-14.7%Jan 1 2026 renewal
AM BestCompetitive pressure outlookRising into 2027Published Aug 2026
Swiss Re InstituteGlobal Cat Bond Performance Index (SRGLTRR)+11.40%Full year 2025
Swiss Re InstituteGlobal Cat Bond Performance Index (SRGLTRR)+4.12%H1 2026

Market Commentary

Property catastrophe reinsurance pricing has now fallen for two consecutive renewal cycles after the 2023 hard-market peak, and 2026 remains the sharpest correction in decades: Guy Carpenter's Global Property Cat RoL Index is holding at -16% year-to-date through the July mid-year renewals — the steepest annual decline since the late 1990s — with no new renewal data this week since the next major reset point is 1 January. Gallagher Re and Howden Re's competing indices told the same story at January 1 (-15% and -14.7% respectively). The driver across all broker commentary remains consistent: record dedicated reinsurance capital (~$660bn) plus growing ILS/alternative capacity has pushed negotiating leverage decisively toward cedents on the back of a largely benign loss environment through most of the year prior to the Spokane wildfire.

AM Best used this quieter renewal window to publish a forward-looking view: it expects competitive pressure on reinsurers to keep building into 2027 as capital keeps growing faster than demand, but believes underwriting discipline — rather than a repeat of the pre-2023 soft-market excesses — can keep sector returns attractive even as headline rates continue to fall. That view is broadly consistent with Munich Re and Lloyd's moving to the top of AM Best's latest global reinsurer capital rankings this week, underscoring that scale and balance-sheet strength remain the differentiators cedents are rewarding in a softening market.

Cat bond spreads continue to reflect the same dynamic. Swiss Re's cat bond indices showed weighted average spreads tightening steadily through H1 2026, and secondary-market activity remained unusually strong — Swiss Re Capital Markets recorded 806 TRACE-reported trades through June, up roughly 37.5% year-on-year, with May 2026 the busiest secondary month since March 2020. Absolute pricing levels remain well above trough even so: Guy Carpenter notes its Global Property Cat RoL Index still sits roughly 32% above where it bottomed during the 2017 soft-market low. Whether the market continues to soften into 2027 will hinge largely on how the remainder of the 2026 Atlantic hurricane season plays out and whether the Spokane wildfire loss proves large enough to change reinsurer risk appetite at the margin.

Private ILS & Collateralized Reinsurance

Coverage of the non-public half of the ILS market — collateralized reinsurance, quota shares and sidecars — which has no Artemis-style deal directory and is tracked here at the aggregate/manager level rather than deal-by-deal, unlike the Deal Tracker tab.

Total Alternative Capital
$141bn
Q1 2026, Aon — up 4% from YE 2025; Q2 figure not yet published
Private / Collateralized (ex-cat bonds)
~$75bn
Est: total alternative capital less $65.6bn outstanding cat bonds
Sidecar Capital
$19.6bn
Property $17.9bn + casualty $1.7bn, as of Sep 2025
Private ILS Fund Return, 2025
+12.47%
ILS Advisers Index, private ILS sub-strategy vs. +10.1% for cat bond funds

Alternative Capital Composition

$bn, Q1 2026 — cat bonds (public/traded) vs. private/collateralized structures

Sidecar Capital by Segment

$bn, as of Sep 2025 — AM Best estimates the sidecar segment overall has grown ~183% since 2023
ManagerStrategyAUMAs Of
Stone Ridge Asset ManagementMutual (40 Act) cat bond & ILS funds~$6.5bnMar 2026
Elementum AdvisorsCollateralized nat cat reinsurance$3.8bnStart of 2026
Integral ILSNat cat insurance & reinsurance; now also cyber ILS (with Beazley)$3.5bnJan 2026
SCOR Investment PartnersILS platform (cat bonds & private)>$5bn2026
Artex Axcell RePrivate cat bond issuance platform$383m issued YTD (4 series)Aug 2026

Not a comprehensive ranking — private ILS managers (Nephila, Fermat Capital, Twelve Securis, LGT ILS Partners, Schroders Capital and others) don't uniformly disclose AUM; figures above are the ones with recent public disclosure.

VehicleSponsor / CedentSegmentSizeLaunched
West Grove ReTalcott (with Goldman Sachs)Life & annuity sidecar$1bn2026
Annapurna Re Ltd.Everest GroupCasualty sidecar (first for Everest)$600m targetJun 2026
George Street ReQBE ReCasualty quota share sidecar (first for QBE)$550m+Early 2026
Unnamed sidecarHamilton Insurance GroupCasualty sidecar (first for Hamilton)~$300m ceded2026
Voussoir ReArch Capital GroupProperty sidecar (Series 2026-9 preferred shares)10,760 shares issuedAug 2026
Outrigger ReArkProperty sidecar (renewal, smaller)$70m2026 renewal

Market Commentary

Private ILS — collateralized reinsurance, quota shares and sidecars — makes up the larger, less visible half of the alternative capital market. Aon puts total third-party/alternative reinsurance capital at $141bn as of Q1 2026 (Q2 figure not yet published), against an outstanding cat bond market of $65.6bn — meaning privately placed structures account for roughly $75bn, more than the public cat bond market itself. Unlike cat bonds, these deals are bilaterally negotiated between cedent and investor/fund, rarely disclosed publicly, and have no equivalent to Artemis' cat bond deal directory — which is why this tab is built from aggregate market-sizing and manager-level disclosures rather than a deal-by-deal table.

This week brought a notable structural development for the segment: Artex Capital Solutions partnered with legacy and run-off specialist Enstar to embed structured exit options within Artex's ILS vehicles, directly targeting the "trapped capital" problem that has historically discouraged some investors from collateralized reinsurance structures — capital held back after a loss year while claims develop can now, in principle, be more efficiently released or transferred. On the private cat bond side, Artex Axcell Re remains the most visible active issuer, having priced four series in 2026 totalling more than $383m, most recently a $60m Series FE0004 transaction. Separately, Arch Capital's Voussoir Re sidecar issued a new tranche (Series 2026-9, 10,760 preferred shares) this week, continuing the steady drip of sidecar capital renewals that don't always come with disclosed dollar sizes.

The broader structural story for 2026 continues to be the rise of casualty sidecars: still roughly 10% of total sidecar capacity but growing from a low base, with first-time casualty sidecar launches this year from QBE Re (George Street Re), Everest Group (Annapurna Re) and Hamilton Insurance Group. AM Best estimates the overall sidecar segment has grown roughly 183% since 2023. Looking ahead, most commentary (HSCM, Insurance Insider ILS, Aon Securities) continues to point to $10–20bn of further ILS market growth in 2026, with private credit increasingly cited as the next major capital source. For an advisory practice, the opacity of this segment remains the opportunity: manager selection, structure comparison and terms benchmarking — including newer features like Artex/Enstar-style exit mechanisms — are harder to do from public data alone, which is precisely where independent due diligence adds the most value relative to the cat bond market.

What to Watch

Weekly Development History

Each week's front-page developments and briefing bottom line, preserved after the dashboard refreshes. Most recent first — click a week to expand.

Bottom line: The ILS market remains at record scale even as reinsurance pricing keeps softening — cat bond issuance holds at $18.9bn+ YTD with the outstanding market at $65.6bn, and ILS fund performance is having its best year since the hard-market peak (+4.05% through H1). This week's news was more structural than pricing-driven: Willis Re's acquisition of BMS Group's US reinsurance broking arm marks the first major consolidation move since its 2024 relaunch, and Munich Re and Lloyd's moved to the top of AM Best's global reinsurer rankings. On losses, Washington's insurance regulator remains on track to publish its first Spokane wildfire claims report by end of August, still the loss event most likely to move the needle before the next refresh.
BriefingWillis Re agreed to acquire BMS Group's US reinsurance broking division, its first major deal since relaunch; Munich Re and Lloyd's moved to the top of AM Best's global reinsurer rankings.
Deal TrackerNo new deals priced since mid-July; 92 deals remain YTD 2026, with State Farm's $1.5bn Merna Re Enterprise II still the year's largest single tranche.
NatCat RatesAM Best warned competitive pressure will keep rising into 2027, even as it expects underwriting discipline to keep returns attractive; Guy Carpenter's Global Property Cat RoL Index still down 16% YTD through July renewals.
EventsCatIQ raised its estimate for the late-June/early-July Ontario & Quebec severe thunderstorm event 17.5% to C$439m; Allstate's cumulative pre-tax cat losses reached $2.402bn through July.
Hurricane TrackerTropical Storm Cristobal became the season's third named storm; still no hurricanes, and NOAA's below-normal forecast (75% probability) is unchanged.
Private ILSArtex Capital Solutions partnered with Enstar on structured exit options for trapped capital in ILS vehicles; Artex Axcell Re's 2026 private cat bond issuance has now topped $383m.
Watch ListThe Spokane wildfire claims data call report is now due imminently — Washington's OIC has committed to a first claims report by end of August.
Bottom line: The ILS market continues to run at record scale even as reinsurance pricing keeps softening — cat bond issuance is at $18.9bn+ YTD with the outstanding market now $65.6bn, and ILS fund performance is having its best year since the hard-market peak (+4.05% through H1). Washington's insurance regulator has now issued a formal data call to insurers on the Spokane wildfires, with a first claims report expected by end of August — still the loss event worth watching most closely, with AM Best and Gallagher Re both flagging it as a potential billion-dollar, possibly record, insured wildfire loss for the state.
BriefingWashington's insurance regulator issued a data call on the Spokane wildfires, with a first claims report expected by end of August; the Bermuda Stock Exchange's cat bond/ILS listings crossed $70.5bn.
Deal TrackerNo new deals priced since the last update; 92 deals remain YTD 2026, with State Farm's $1.5bn Merna Re Enterprise II still the year's largest single tranche.
NatCat RatesHannover Re said it still sees growth in property cat even as it expects the pace of price reductions to decelerate; Guy Carpenter's Global Property Cat RoL Index remains down 16% YTD through July renewals.
EventsNo change to the H1 2026 ~$42bn global insured loss aggregate this week; the Jan 2025 LA wildfires remain the costliest wildfire event on record at ~$40bn.
Hurricane TrackerStill only two named storms this season (Arthur, Bertha) and no hurricanes; NOAA's below-normal forecast (75% probability) is unchanged.
Private ILSTotal alternative capital remains at $141bn (Q1 2026, Aon, most recent published figure); casualty sidecars continue as the standout 2026 growth story.
Watch ListThe Spokane wildfire claims data call is the item most likely to produce a hard loss figure by the next refresh, expected end of August.
Bottom line: The ILS market continues to run at record scale even as reinsurance pricing keeps softening — cat bond issuance is at $18.9bn+ YTD with the outstanding market now $65.6bn, and ILS fund performance is having its best year since the hard-market peak (+4.05% through H1). The one loss event worth watching closely is the ongoing Spokane, Washington wildfire, flagged by AM Best and Gallagher Re as a potential billion-dollar insured event and possibly the costliest wildfire loss in the state's history.
BriefingCat bond issuance passes $18.9bn YTD as reinsurance pricing keeps softening; the Spokane, WA wildfire is flagged as a potential billion-dollar insured loss.
Deal Tracker92 deals priced YTD 2026; State Farm's $1.5bn Merna Re Enterprise II remains the year's largest single tranche.
NatCat RatesGuy Carpenter's Global Property Cat RoL Index is down 16% YTD through July renewals — the steepest annual decline since the late 1990s.
EventsH1 2026 global insured losses are running ~$42bn; the Jan 2025 LA wildfires remain the costliest wildfire event on record at ~$40bn.
Hurricane TrackerOnly two named storms so far this season (Arthur, Bertha); NOAA holds a 75% below-normal seasonal forecast.
Private ILSTotal alternative capital reached $141bn in Q1 2026 (Aon); casualty sidecars are the standout 2026 growth story, with Everest, QBE and Hamilton all launching first-time vehicles.
Watch ListThe Spokane wildfire loss estimate is the single figure most likely to move by next week's refresh.