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 Banks3.40%-0.83 ppTransaction & Payment Processing Services1.34%-0.28 ppInvestment Banking & Brokerage1.18%-0.16 ppConsumer Finance0.59%-0.13 ppRegional Banks0.33%-0.11 ppLife & Health Insurance0.49%-0.09 ppAsset Management & Custody Banks0.54%-0.09 ppMulti-line Insurance0.19%-0.07 ppProperty & Casualty Insurance1.05%+0.06 ppFinancial Exchanges & Data1.14%+0.04 ppInsurance Brokers0.78%-0.03 ppReinsurance0.05%+0.01 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.78%
Industry change · 12M
-0.03 pp
Insurance Brokers · contribution
-0.027 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 |
|---|---|---|---|---|---|---|---|
| Arthur J. Gallagher & Co. → AJG | United States | $40.6bn | 0.138% | -0.005 pp | +0.016 pp | +10.8% | No |
| Aon plc → AON | United States | $64.7bn | 0.221% | -0.003 pp | -0.014 pp | -2.5% | Yes |
| Brown & Brown → BRO | United States | $16.3bn | 0.056% | -0.003 pp | -0.013 pp | -20.0% | No |
| Willis Towers Watson → WTW | United States | $24.8bn | 0.084% | -0.011 pp | -0.009 pp | -0.1% | No |
| Marsh McLennan → MRSH | United States | $82.4bn | 0.281% | -0.015 pp | -0.007 pp | -0.9% | 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.