Observatory · observe first
Follow the allocation change
Matched S&P 500 members → sector → industry → sub-industry → company. Each step uses the same percentage points.
Historical time machine
Historical observation
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Financials
Transaction & Payment Processing Services0.63%-0.46 ppFinancial Exchanges & Data0.69%-0.40 ppDiversified Banks3.53%-0.31 ppAsset Management & Custody Banks1.17%-0.31 ppInsurance Brokers0.45%-0.26 ppProperty & Casualty Insurance0.90%-0.20 ppLife & Health Insurance0.33%-0.05 ppConsumer Finance0.66%-0.05 ppInvestment Banking & Brokerage1.43%+0.05 ppRegional Banks0.35%+0.04 ppMulti-line Insurance0.13%-0.04 ppReinsurance0.02%-0.01 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.45%
Industry change · 12M
-0.26 pp
Insurance Brokers · contribution
-0.263 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 2026 · sorted by absolute contribution to 12-month change
| Company | Country | Market cap | Universe weight | 3M contribution | 12M contribution | 12M price return | Above 6M weight average |
|---|---|---|---|---|---|---|---|
| Marsh McLennan → MRSH | United States | $80.3bn | 0.140% | +0.017 pp | -0.093 pp | -22.3% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $59.0bn | 0.102% | +0.021 pp | -0.074 pp | -27.5% | Yes |
| Aon plc → AON | United States | $70.8bn | 0.123% | +0.022 pp | -0.043 pp | -6.6% | Yes |
| Brown & Brown → BRO | United States | $21.7bn | 0.038% | +0.005 pp | -0.031 pp | -41.6% | Yes |
| Willis Towers Watson → WTW | United States | $24.7bn | 0.043% | +0.003 pp | -0.023 pp | -13.7% | Yes |
Company contributions use weights among matched S&P 500 members and add through each level without rescaling. Companies without matched shares and prices are omitted. These observations do not establish official index weights or actual fund flows.