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 Banks4.12%-4.32 ppInvestment Banking & Brokerage0.77%-0.85 ppAsset Management & Custody Banks0.57%-0.65 ppProperty & Casualty Insurance0.65%-0.58 ppTransaction & Payment Processing Services0.99%-0.53 ppConsumer Finance0.51%-0.45 ppRegional Banks0.38%-0.41 ppLife & Health Insurance0.48%-0.36 ppFinancial Exchanges & Data0.52%-0.32 ppMulti-line Insurance0.22%-0.23 ppInsurance Brokers0.30%-0.22 ppReinsurance0.03%-0.02 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.30%
Industry change · 12M
-0.22 pp
Insurance Brokers · contribution
-0.221 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2018 · 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 | $41.8bn | 0.133% | -0.119 pp | -0.110 pp | -0.0% | No |
| Aon plc → AON | United States | $37.3bn | 0.119% | -0.085 pp | -0.084 pp | +9.1% | No |
| Arthur J. Gallagher & Co. → AJG | United States | $13.6bn | 0.043% | -0.029 pp | -0.027 pp | +10.9% | No |
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.