Teardown

Insurance / Global Insurance Broker & Advisory · Deep dive

Willis Towers Watson (WTW)

The #3 global insurance broker — a 1828 London commodities-brokerage that merged its way into a 46,900-person, 140-country consultancy-and-broker hybrid, still trailing Marsh McLennan and Aon on organic growth, margin and M&A firepower five years after the DOJ blew up its Aon merger and cost it Willis Re.

at risk

The #3 seat between MMC and Aon is a structurally under-scaled position — WTW cannot match a $7.75B McGriff cash deal or a $13B NFP deal, has already lost Willis Re and TRANZACT out of the perimeter, has run a full 100+ bps organic-growth deficit to Aon in 2025, and is now betting a Yale-trained actuary CEO's remaining tenure on a $625M AI margin story to reach ~30% by 2028 while the stock trades down 22% YTD and buyback dwarfs strategic reinvestment.

My take

HQ
London, UK (Willis Building, 51 Lime Street) — US operational HQ Arlington, VA
Founded
1828 (Henry Willis, London commodities brokerage; insurance broking from 1841). Modern entity formed via Willis Group / Towers Watson merger 4 January 2016; rebranded from Willis Towers Watson to 'WTW' in 2021.
Ownership
Public — NASDAQ: WTW (previously WLTW). No controlling holder; Vanguard / BlackRock / State Street index complex dominates institutional float; activist history includes Starboard Value, Elliott Management and TCI (Chris Hohn) all reported building stakes in October 2021 after the Aon deal collapsed.
Funding
N/A. Traces to Henry Willis's 1828 London commodities brokerage and Reuben Watson's 1878 UK actuarial firm; the current entity was created by the $18B all-stock Willis Group Holdings + Towers Watson merger on 4 January 2016, in which Towers Watson holders received 2.6490 Willis ordinary shares per Towers Watson share. Self-funded since via operating cash flow, senior notes, and share repurchases.
Valuation
~$31.7B market cap (mid-August 2026, at roughly $280 per share on NASDAQ; verify against current quote — WTW is down ~22% year-to-date 2026 and ~17% over the trailing 52 weeks while the S&P 500 has rallied ~30%, per Yahoo Finance and stockanalysis.com data).
Revenue
$9.71B FY2025 (year ended 31 December 2025; down 2.2% GAAP, down 3% constant currency, up 5% organic — the GAAP drop is the disposal of TRANZACT). Segment split ~59% Health, Wealth & Career / ~41% Risk & Broking. Q4 2025: Risk & Broking $1.25B (+10% GAAP / +7% organic); HWC $1.65B (-11% GAAP / +6% organic ex-TRANZACT). Q2 2026 (30 July 2026 print): revenue $2.47B, adjusted diluted EPS $3.35 (+17% YoY), enterprise organic +5%, adjusted operating margin +100 bps YoY; Risk & Broking $1.16B (+11% GAAP / +7% organic) at a 22.2% segment operating margin; HWC +4% organic (Health +8%, Wealth up, Career flat). FY2016-FY2025 cumulative capital return to shareholders ~$13.8B.
Headcount
~46,900 as of 31 December 2025 (down ~2,000 / -4% year-on-year — a rare headcount contraction driven by the TRANZACT divestiture that closed on 31 December 2024 and by ongoing 'Transformation' cost actions). Serving clients in more than 140 countries and markets.
Screen
Public incumbent — market cap and enterprise value both above the $10B non-tech threshold; FY2025 revenue $9.71B (down 2.2% GAAP after the TRANZACT sale; +5% organic); consistently the #3 named diversified global broker behind Marsh McLennan (MMC, ~$27B FY2025 revenue) and Aon (~$16B FY2025 revenue).
Published
2026-08-21
Web
www.wtwco.com
Elsewhere
LinkedIn · Crunchbase

Founders and leadership

  • Henry Willis Founder of the Willis lineage (1828, London)

    Began selling imported goods on commission on the Baltic Exchange in London in 1828; from 1841 began broking insurance on the cargoes he was already trading. The business became Willis, Faber & Co. after the 1898 merger with Faber Brothers, then Willis, Faber & Dumas in 1928 after the merger with Dumas & Wylie, and entered the US retail market in 1990 by merging with Corroon & Black to form Willis Corroon. Every part of the 'Willis' half of the modern entity traces back to this line.

  • Reuben Watson Founder of the Watson lineage (1878, UK)

    Founded R. Watson & Sons with his son Henry Watson in 1878 in the UK — the firm that would become the world's oldest continuous actuarial consulting practice, later Watson Wyatt, later Towers Watson (via the 1 January 2010 Towers Perrin / Watson Wyatt merger), and finally the 'Towers Watson' half of the modern WTW after the 4 January 2016 combination with Willis Group.

  • John J. Haley Founding CEO of the combined WTW (2016 – 31 December 2021); ex-CEO of Towers Watson

    Actuary; ran Watson Wyatt for a decade before leading it into the 2010 Towers Perrin merger that formed Towers Watson, then negotiated and led the 2016 Willis Towers Watson combination. Haley was the CEO on watch when the 2020 Aon deal was signed and the 2021 Aon deal collapsed under DOJ challenge; he retired at year-end 2021 and handed the seat to Carl Hess on 1 January 2022. The transaction that made him — and the transaction that unmade the deal that would have consummated his tenure — both happened under him.

  • Carl A. Hess President & CEO (since 1 January 2022; President since 16 August 2021)

    Fellow of the Society of Actuaries; Chartered Enterprise Risk Analyst; BA (cum laude) in logic and language from Yale. Joined Watson Wyatt in 1989 and never left the family of firms — 33 years of continuous tenure across Watson Wyatt, Towers Watson and WTW. Ran the Investment business, then became Managing Director of the Americas at Towers Watson (2014), then Head of Investment, Risk & Reinsurance at WTW (October 2016). Took the CEO seat on 1 January 2022 immediately after the Aon deal died and the activist stakes appeared, and has run the company on the two-segment (HWC + R&B) model, the TRANZACT divestiture, capital return and now the 'Propel' AI plan announced 30 July 2026.

  • Andrew J. Krasner Chief Financial Officer (since March 2022)

    Joined from Liberty Mutual Group where he was Chief Financial Officer. Has been the CFO across the entire Carl Hess era — the TRANZACT sale and pre-tax loss, the buyback authorization expansion to $13.65B by mid-2026, and the $625M Propel investment thesis are his to defend.

  • Lucy Clarke President, Risk & Broking (since 22 July 2024)

    Recruited from Marsh McLennan, where she was President of Marsh Specialty and Global Placement — a direct hire out of the #1 competitor. Adam Garrard (previously R&B President) moved to Chair of R&B on the same day. The message from that appointment: the R&B segment, which is the growth engine relative to HWC, needed a Marsh operator.

  • Paul Reilly Non-Executive Chair (following the 2025 AGM)

    Independent director since October 2022; selected March 2025 to succeed Paul Thomas as Non-Executive Chair after Thomas announced retirement at the end of his term. The chair change was public and orderly rather than crisis-driven.

Snapshot

WTW is the #3 global diversified insurance broker and advisory firm, behind Marsh McLennan ($27B FY2025 revenue) and Aon ($16.5B), on $9.71B FY2025 revenue — down 2.2% GAAP after the year-end 2024 TRANZACT sale, +5% organic. Two segments: Health, Wealth & Career (~59%; the Towers Watson benefits/pensions inheritance) and Risk & Broking (~41%; the Willis specialty broking inheritance). ~46,900 employees in 140+ countries; ~$31.7B market cap in mid-August 2026 — roughly one-fifth of MMC and half of Aon. Q2 2026 beat estimates on 5% organic and +100 bps of margin, then announced ‘Propel’ — a $625M AI plan targeting ~30% adjusted operating margin by 2028.

Founding story

WTW is a stack of mergers, and the history reads as ownership genealogy. Henry Willis started as a Baltic Exchange commodities broker in London in 1828 and moved into insurance broking by 1841; Willis Faber (1898), Willis Faber & Dumas (1928), Willis Corroon (1990 US entry) and Willis Group Holdings (NYSE 2001) restate that line. Reuben Watson founded R. Watson & Sons in 1878; the firm became Watson Wyatt, then Towers Watson (merger with Towers Perrin 1 January 2010), then combined with Willis on 4 January 2016 in an $18B all-stock deal at 2.6490 Willis shares per Towers Watson share, with John Haley running the combined company.

The ‘Willis Towers Watson’ name lasted five years — the entity rebranded to ‘WTW’ in 2021, the same year the biggest strategic setback in its history landed. Carl Hess, an actuary and 33-year Watson Wyatt / Towers Watson / WTW lifer with a Yale degree in logic and language, took the CEO seat on 1 January 2022 immediately after the Aon deal collapsed. Mandate: prove a two-segment model can run at Aon-level margins without Aon-level M&A firepower.

How it works

WTW earns fees for placing insurance and for consulting. On R&B: a Fortune 500 risk manager tells the WTW broker of record it needs $500M of US property cover. WTW builds the placement — Zurich, AIG, Chubb, FM Global, Lloyd’s syndicates — negotiates terms, assembles the layered tower, and collects a commission (~10% of premium on London-market portions; less on direct US) or a negotiated fee. Producer economics dominate: a producer with a $3M book generates ~$3M of revenue at 60-70% gross margin; incremental accounts on the same desk are highly accretive.

On HWC: an HR director asks WTW to redesign a 40,000-employee health plan. WTW runs the actuarial analysis, benchmarks against a proprietary database, models plan design, and negotiates with carriers. Billing is fixed-fee project, per-participant retainer, or platform fees. Inside HWC sits Wealth — the largest independent DB pension consulting business in the world, inherited from Towers Perrin / Watson Wyatt.

The uncomfortable operational reality: R&B’s most valuable growth engine — the Willis Re treaty reinsurance franchise in the London market — was sold to Gallagher on 1 December 2021 for $3.25B plus a $750M earnout. The sale was forced by the Aon-WTW divestiture package and could not be reversed after the deal died six months earlier. Every quarter since 2022 permanently reflects the missing revenue and margin from what today would be a ~$1B+ reinsurance broker inside R&B.

Product and business overview

Risk & Broking ($4.0B+ FY2025; ~41% of revenue; Q2 2026 $1.16B at +7% organic, 22.2% margin). Commercial P&C broking, specialty (aerospace, energy, marine, cyber, construction, financial lines), captive management, and — post-Willis Re — a small facultative reinsurance foothold rather than a full treaty franchise. The London-market specialty franchise is the historical crown jewel.

Health, Wealth & Career (~59% of revenue; Q2 2026 +4% organic — Health +8%, Wealth up, Career flat). Health benefits consulting (~half), retirement/pension consulting (the DB legacy), and Career (executive comp, workforce transformation, communications). Career is flat and was explicitly held back in Q2 2026 by Middle East conflict-driven softness.

The pre-2022 four-segment model was consolidated after the Aon deal died. TRANZACT (direct-to-consumer Medicare distribution, acquired 2019) was sold 31 December 2024 for $632M against a $1.1B pre-tax loss and $1.0B goodwill impairment — a rare public admission that a $1.4B acquisition didn’t work.

Business model and pricing

Three revenue types: commission (percentage of premium placed — the traditional retail-broker model), fee-for-service (negotiated fixed or hourly on complex placements and consulting), and contingent / market-derived income (volume and profitability overrides from carriers — disclosed and periodically litigated across the industry). HWC consulting engagements are typically fixed-fee project or per-participant retainer; the largest DB clients pay six- and seven-figure annual retainers plus discretionary project work.

Pricing power comes from specialty leadership in London-market slot placements (aerospace, marine, complex construction), long-tenured relationships with the world’s largest employers and pension trustees, and scale in producer networks. Weak spots: middle-market P&C (where MMC’s MMA and Aon’s NFP are now much better resourced), health benefits (Mercer is bigger), and direct-to-consumer (exited via TRANZACT).

Traction over time

PeriodRevenueOrganicOp marginNote
FY2016$7.9Bn/a~19%First full year of Willis + Towers Watson
FY2020$9.35B~3%~19%Year Aon deal announced
FY2021$9.03B~5%~19%Willis Re sold; Aon deal terminated; $1B fee received
FY2022$8.86B~4%~19%Carl Hess Year 1; two-segment reorg
FY2023$9.48B~9%~21%Best organic year since merger
FY2024$9.93B~5%~22%TRANZACT sold at year end; $1.1B loss booked
FY2025$9.71B (-2%)+5%~22%Ex-TRANZACT compare; R&B 6% organic
Q1 2026~$2.2B+5%in lineR&B softer than expected on delayed Q1 activity
Q2 2026$2.47B+5%+100 bpsR&B $1.16B (+7% organic, 22.2%); HWC +4%; adj EPS $3.35 (+17%); Propel

Aon delivered 6% organic in 2025, MMC 4%; WTW’s 5% sits between — but reflects the TRANZACT removal, and R&B organic decelerated from 8% (FY2024) to 6% (FY2025) even as Aon held flat.

Market analysis

Global insurance broking is a ~$100-140B fee-and-commission market growing mid-single digits, with the four large public brokers (MMC, Aon, WTW, Gallagher) plus Brown & Brown, private roll-ups (Hub, USI, Lockton, Alliant, Acrisure) and PE-backed platforms. The market is consolidating fast in the middle: MMC bought McGriff ($7.75B) in November 2024, Aon bought NFP ($13B) in April 2024, and PE-backed roll-ups keep buying tuck-ins at 12-16x EBITDA. WTW’s recent middle-market M&A has been dwarfed by both peers.

Propel is WTW’s answer to a market where the top two get larger via cash M&A while WTW buys back stock. It promises ~30% adjusted operating margin by 2028 vs ~22-23% at FY2025 exit — ~800 bps from automating high-volume admin, retiring legacy systems, and cutting third-party spend. Works: WTW re-rates as high-margin advisory. Fails: $625M spent without moving the needle.

Competitive intel

The named set is in the frontmatter. MMC is not just larger — it is more diversified (Marsh, Guy Carpenter, Mercer, Oliver Wyman each a category leader, MMA consolidating US middle-market retail behind McGriff). Aon has spent three years overhauling distribution — ‘Aon United’, ‘Aon Business Services’, and NFP all push more revenue per client and per producer. WTW’s tidy two-segment model hides the fact that WTW leads no segment: HWC smaller than Mercer, R&B smaller than Marsh, London specialty co-lead with both.

Willis Re at Gallagher is a permanent structural loss — a ~$1B+ franchise that would sit inside WTW today had the Aon deal never been signed. Brown & Brown’s 10%+ organic and 30%+ margin exposes the gap Propel targets. Hub, USI and Lockton — no quarterly pressure, ownership incentives at every producer — out-hire public brokers in exactly WTW’s middle-market segment.

History and evolution

What people say

The case for. Bulls point to 5-6% enterprise organic growth, ~100 bps of annual margin expansion, and a durable HWC franchise competitors struggle to replicate (Mercer excepted). Baird’s Mark Marcon and Mizuho’s Yaron Kinar both raised 2026 price targets (to $385 and $406) on Propel and Q2 execution, arguing WTW is finally delivering the margin story the Aon deal was supposed to force. Glassdoor sits at 3.8/5 with 77% recommending, with recurring positive themes around flexible work, deep benefits expertise, and collegiality inside specialty and consulting teams.

The complaints. Post-merger cultural drag shows up consistently: “power resides with US counterparts,” “lack of quality after merger of Willis and Towers Watson,” pay raises inadequate to retain staff. Most-cited: a rigid once-a-year (April) promotion cycle and an HR function multiple reviewers call “literally non-existent, completely broken.” Sell-side: Citi downgraded WTW to Neutral in 2026 on balanced risk/reward; a Seeking Alpha bear note argues AI optimism is now in the shares. The activist history (Starboard, Elliott, TCI reportedly at the register October 2021) is a permanent overhang. Underperformance is measurable: WTW down 17% over the trailing 52 weeks and 22% YTD 2026 vs the S&P 500 up ~30%.

Outlook: well positioned or at risk?

At risk. WTW is stuck in the #3 seat between an MMC that spent $7.75B on McGriff and an Aon that spent $13B on NFP, while WTW has shrunk the perimeter — Willis Re out ($3.25B, forced), TRANZACT out ($632M, elective, $1.1B loss) — and returned $13.8B via buyback over a decade rather than deploy comparable M&A firepower. The 2025 organic spread (Aon 6% / WTW 5% / MMC 4%) flatters WTW; R&B organic decelerated from 8% (2024) to 6% (2025). The $625M Propel bet on ~30% adjusted operating margin by 2028 is now the equity thesis. If it delivers, WTW re-rates as a smaller, higher-margin advisory business. If it doesn’t — if middle-market share keeps drifting to McGriff-in-MMA and NFP-in-Aon, if London specialty softens, if a rate-cycle downturn hits pricing — a decade of the same story continues: below-peer growth, below-peer margin, sub-scale M&A, above-peer buyback. That is the setup that drew Starboard, Elliott and TCI in 2021, and the fundamentals for another activist campaign are more visible in 2026 than they were then.

How a challenger would attack it

Poach the producers, then productize the actuaries. WTW’s revenue is producer books — a $3M book is $3M of revenue at 60-70% gross margin — and its own Glassdoor record describes the retention machinery failing: a rigid once-a-year April promotion cycle, pay raises “inadequate to retain staff,” and an HR function reviewers call “completely broken.” Lockton already runs this play against public brokers; a challenger does it systematically, offering equity-like producer economics WTW’s buyback-first capital allocation (~$13.8B returned FY2016-FY2025) structurally cannot match, targeting the London specialty desks that are the R&B crown jewel and the middle-market accounts where McGriff-in-MMA and NFP-in-Aon are already squeezing. The second vector is HWC’s consulting model itself: health-plan design, pension analytics and benchmarking against proprietary databases is exactly the fixed-fee, data-heavy work that AI-native tooling unbundles — WTW’s own Propel plan concedes the point by promising to automate “high-volume admin,” but a challenger without 46,900 employees and legacy systems ships the automated version as software at a fraction of six-figure retainers, forcing WTW to cannibalize consulting revenue to defend it. Third, timing: Propel’s $625M spend runs 2026-2028 with the majority back-loaded, the stock is down 22% YTD, and the activist precedent (Starboard, Elliott, TCI in 2021) means any execution stumble invites a distraction campaign — the window to hire away talent is precisely while the transformation churn is highest.

Same playbook, new buyer

The two-segment model — risk broking fused with human-capital consulting — is genuinely differentiated; the opportunity is running it for buyers the big three ignore. The clearest shift is downmarket: the McGriff and NFP deals show the giants consolidating US middle-market distribution, but the actual mid-market employer (500-5,000 employees) still buys benefits consulting and P&C broking from separate, subscale providers — a tech-forward integrated advisor at that tier gets Hub-style economics with WTW-style cross-sell, and WTW can’t chase it because its cost structure and producer model are calibrated to Fortune 500 retainers. Second, geography: WTW’s DB pension franchise is a declining-asset business in the US/UK, but pension and social-insurance reform across the Gulf, Southeast Asia and Latin America is creating new DC-and-benefits consulting demand where none of the incumbents has committed local density — an emerging-markets benefits specialist rides the demographic curve WTW’s legacy book is on the wrong side of. Third, the buyer inside the account: selling risk analytics and placement tooling directly to corporate risk managers and captives as software-plus-marketplace — disintermediating the commission model entirely — is the move a broker earning ~10% of premium can never make against itself.

Sources and further reading

Capital history

DateRoundAmountValuationLead(s)
1828 Founding — Henry Willis, London n/a n/a Henry Willis; commodities broking on the Baltic Exchange
1878 Founding — R. Watson & Sons n/a n/a Reuben Watson; UK actuarial consultancy
1990 Willis Corroon formed Undisclosed n/a Willis Faber merges with Corroon & Black; US retail broking entry
2010-01-01 Formation of Towers Watson All-stock merger of equals n/a Towers Perrin + Watson Wyatt; John Haley CEO
2016-01-04 Willis + Towers Watson merger; NASDAQ listing under WLTW $18B all-stock; 2.6490 Willis shares per Towers Watson share $18B combined equity value at close; target synergies of $100-125M annual cost + $75M tax + $375-675M incremental revenue Willis Group and Towers Watson boards; John Haley (CEO), Dominic Casserley (President)
2020-03-09 Announced acquisition by Aon plc All-stock; implied ~$30B combined-equity value ('$80B combined') 1.08 Aon shares per WTW share Aon (Greg Case, CEO); WTW (John Haley, CEO)
2021-06-16 DOJ files civil antitrust suit to block Aon-WTW merger n/a n/a US Department of Justice (Antitrust Division)
2021-07-26 Aon-WTW merger terminated by mutual agreement $1.0B termination fee paid by Aon to WTW n/a Aon and WTW boards; cited 'impasse' with DOJ
2021-12-01 Divestiture — Willis Re to Arthur J. Gallagher $3.25B initial cash consideration + up to $750M earnout at year 3 Combined Gallagher Re annualised revenue ~$1B — instant #3 reinsurance broker Arthur J. Gallagher & Co.
2022-01-01 CEO transition — John Haley to Carl Hess n/a n/a WTW board
2021-Q4 to 2026-Q2 Cumulative equity buyback authorization $13.65B authorization by August 2026; ~$450M of Q2 2026 repurchases; ~$13.8B total capital returned FY2016-FY2025 n/a WTW board
2024-12-31 Divestiture — TRANZACT to GTCR and Recognize $632M cash consideration; $1.1B pre-tax loss on disposal; $1.0B pre-tax goodwill impairment n/a — direct-to-consumer Medicare distribution exit GTCR (PE); Recognize (digital services)
2026-07-30 'Propel' AI acceleration plan announced with Q2 2026 earnings ~$625M cash investment 2026-2028 (majority in 2027-2028) plus ~$25M non-cash charges Target ~$400M run-rate savings / ~$350M net after reinvestment by end of 2028; adj operating margin target ~30% 2028 Carl Hess, CEO; Andrew Krasner, CFO

Investors / owners: The Vanguard Group — largest institutional holder, BlackRock, State Street, Starboard Value — took stake October 2021 per Wall Street Journal reporting, Elliott Management — took stake October 2021 per Wall Street Journal reporting, TCI Fund Management (Chris Hohn) — reported building a stake October 2021

Competitive set

  • Marsh McLennan (MMC) — NYSE: MMC. FY2025 revenue ~$27.0B (+10% GAAP / +4% organic), operating across Marsh (retail P&C broking), Guy Carpenter (reinsurance), Mercer (health / wealth / career) and Oliver Wyman (management consulting). The #1 broker globally by a wide margin. Completed the $7.75B all-cash acquisition of McGriff Insurance Services on 15 November 2024 — a Charlotte-based middle-market broker with $1.3B TTM revenue and 3,500 colleagues, folded into Marsh McLennan Agency (MMA). MMC's four-pillar structure and its willingness to spend nearly $8B in cash on middle-market roll-up is the direct competitive counter to WTW's two-segment model and $13.65B buyback.
  • Aon plc — NYSE: AON. FY2025 revenue ~$16.5B at +6% organic (level with 2024) — two full percentage points above WTW's 5% organic and two above MMC's 4%. Completed the $13.0B enterprise-value acquisition of NFP Corp on 25 April 2024 ($7.0B cash + $6.0B equity in 19.0M Aon shares; 7,700 NFP colleagues) — a middle-market P&C / benefits / wealth roll-up designed to build a distinct 'Aon Client Leader' distribution layer. Aon's willingness to eat the WTW breakup fee it paid in 2021 and then still spend $13B to reposition mid-market is what makes WTW's flat middle-market posture look most exposed.
  • Arthur J. Gallagher & Co. — NYSE: AJG. Global broker and reinsurance broker; ~$12B revenue TTM 2025. Bought Willis Re from WTW on 1 December 2021 for $3.25B + $750M earnout — an asset WTW had been forced to sell because the Aon-WTW merger required it, then had to keep as a divestiture even after the deal died. The Willis Re carve-out sits inside Gallagher Re, an annualised ~$1B+ reinsurance broker sitting behind Guy Carpenter and Aon Reinsurance. Every WTW quarter permanently reflects the absence of a business that would be paying revenue and margin now had the Aon deal never been signed.
  • Brown & Brown — NYSE: BRO. ~$5B revenue TTM 2025. Middle-market and retail P&C broker; consistently prints 10%+ organic growth and 30%+ margins — a US retail-broker growth benchmark that reveals what a focused middle-market broker looks like next to WTW's mid-single-digit organic and low-20s R&B margin.
  • Hub International — Private; PE-owned (Hellman & Friedman-led consortium since 2013, with Altas Partners and Alberta Investment Management joining subsequent recaps). ~$5B revenue estimated 2025. Roll-up middle-market P&C and benefits broker in North America; has completed hundreds of tuck-ins. The archetype of what MMC and Aon are now trying to replicate at scale through McGriff and NFP — and the specific competitor for WTW's middle-market accounts.
  • Lockton Companies — Private; ~$3.6B fiscal-year revenue 2025 (April year-end). Largest privately owned insurance broker in the world; deliberately private to avoid the quarterly-earnings machine WTW has to run. Notorious in the industry for hiring away producers from public brokers, WTW included.
  • USI Insurance Services — Private; majority-owned by KKR and Caisse de dépôt (CDPQ). ~$3B revenue estimated 2025. US middle-market P&C and benefits broker; one of the largest private roll-ups still trading. Competes directly with the middle-market end of WTW's Risk & Broking book.