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
Diversified Banks4.04%-0.73 ppTransaction & Payment Processing Services1.43%-0.50 ppProperty & Casualty Insurance1.14%+0.21 ppConsumer Finance0.66%-0.10 ppFinancial Exchanges & Data1.19%+0.09 ppInsurance Brokers0.81%+0.08 ppInvestment Banking & Brokerage1.41%-0.06 ppAsset Management & Custody Banks0.62%-0.06 ppLife & Health Insurance0.60%+0.03 ppRegional Banks0.46%-0.01 ppReinsurance0.05%+0.01 ppMulti-line Insurance0.23%-0.01 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.81%
Industry change · 12M
+0.08 pp
Insurance Brokers · contribution
+0.078 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2023 · 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 | $86.8bn | 0.297% | +0.013 pp | +0.036 pp | +15.5% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $41.3bn | 0.141% | +0.002 pp | +0.031 pp | +25.4% | Yes |
| Aon plc → AON | United States | $65.9bn | 0.226% | +0.019 pp | +0.021 pp | +16.1% | Yes |
| Brown & Brown → BRO | United States | $16.6bn | 0.057% | -0.002 pp | -0.006 pp | -11.0% | No |
| Willis Towers Watson → WTW | United States | $27.5bn | 0.094% | +0.010 pp | -0.004 pp | +10.3% | 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.