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 Banks4.45%-2.23 ppTransaction & Payment Processing Services2.77%+0.28 ppLife & Health Insurance0.52%-0.22 ppConsumer Finance0.66%-0.19 ppProperty & Casualty Insurance0.94%-0.18 ppAsset Management & Custody Banks0.65%-0.18 ppRegional Banks0.39%-0.17 ppMulti-line Insurance0.21%-0.12 ppInsurance Brokers0.53%-0.07 ppInvestment Banking & Brokerage1.18%+0.04 ppReinsurance0.04%-0.02 ppFinancial Exchanges & Data1.05%+0.01 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.53%
Industry change · 12M
-0.07 pp
Insurance Brokers · contribution
-0.070 pp
Company participation
67%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2020 · 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 |
|---|---|---|---|---|---|---|---|
| Aon plc → AON | United States | $48.3bn | 0.195% | +0.195 pp | -0.044 pp | +2.4% | Yes |
| Marsh McLennan → MRSH | United States | $59.3bn | 0.240% | +0.240 pp | -0.036 pp | +6.9% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $23.8bn | 0.096% | -99.803 pp | +0.009 pp | +32.1% | 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.