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
Asset Management & Custody Banks1.47%+0.71 ppDiversified Banks3.71%-0.15 ppInvestment Banking & Brokerage1.26%+0.12 ppInsurance Brokers0.86%+0.10 ppProperty & Casualty Insurance1.24%+0.07 ppTransaction & Payment Processing Services1.24%-0.06 ppLife & Health Insurance0.44%-0.05 ppMulti-line Insurance0.19%-0.03 ppRegional Banks0.31%-0.02 ppReinsurance0.04%-0.01 ppConsumer Finance0.66%-0.00 ppFinancial Exchanges & Data1.14%+0.00 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.86%
Industry change · 12M
+0.10 pp
Insurance Brokers · contribution
+0.100 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2025 · 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 |
|---|---|---|---|---|---|---|---|
| Arthur J. Gallagher & Co. → AJG | United States | $87.9bn | 0.209% | +0.068 pp | +0.058 pp | +39.2% | Yes |
| Aon plc → AON | United States | $86.2bn | 0.205% | +0.029 pp | +0.021 pp | +20.6% | Yes |
| Brown & Brown → BRO | United States | $35.6bn | 0.084% | +0.018 pp | +0.015 pp | +42.9% | Yes |
| Marsh McLennan → MRSH | United States | $119.9bn | 0.285% | +0.048 pp | +0.004 pp | +20.2% | Yes |
| Willis Towers Watson → WTW | United States | $33.7bn | 0.080% | +0.008 pp | +0.002 pp | +24.4% | 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.