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 Banks4.32%-2.28 ppTransaction & Payment Processing Services2.77%+0.22 ppLife & Health Insurance0.53%-0.22 ppProperty & Casualty Insurance0.91%-0.21 ppConsumer Finance0.65%-0.20 ppAsset Management & Custody Banks0.64%-0.19 ppRegional Banks0.38%-0.18 ppMulti-line Insurance0.22%-0.13 ppInsurance Brokers0.54%-0.06 ppInvestment Banking & Brokerage1.11%-0.05 ppFinancial Exchanges & Data1.08%+0.02 ppReinsurance0.04%-0.02 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.54%
Industry change · 12M
-0.06 pp
Insurance Brokers · contribution
-0.062 pp
Company participation
67%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 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 | $46.8bn | 0.199% | +0.199 pp | -0.041 pp | +1.6% | Yes |
| Marsh McLennan → MRSH | United States | $58.1bn | 0.247% | +0.247 pp | -0.028 pp | +7.9% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $22.2bn | 0.094% | -99.802 pp | +0.007 pp | +25.9% | 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.