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 Banks3.36%-0.42 ppInvestment Banking & Brokerage1.11%-0.26 ppTransaction & Payment Processing Services1.28%-0.22 ppAsset Management & Custody Banks0.74%+0.19 ppRegional Banks0.31%-0.17 ppFinancial Exchanges & Data1.14%+0.06 ppConsumer Finance0.53%-0.06 ppLife & Health Insurance0.52%-0.05 ppInsurance Brokers0.84%+0.03 ppProperty & Casualty Insurance1.04%+0.02 ppReinsurance0.05%+0.01 ppMulti-line Insurance0.22%-0.00 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.84%
Industry change · 12M
+0.03 pp
Insurance Brokers · contribution
+0.027 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 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 | $49.1bn | 0.164% | +0.055 pp | +0.023 pp | +34.5% | Yes |
| Marsh McLennan → MRSH | United States | $94.0bn | 0.314% | +0.099 pp | +0.021 pp | +29.3% | Yes |
| Willis Towers Watson → WTW | United States | $21.9bn | 0.073% | +0.015 pp | -0.014 pp | +5.5% | Yes |
| Aon plc → AON | United States | $65.8bn | 0.220% | +0.057 pp | -0.002 pp | +21.9% | Yes |
| Brown & Brown → BRO | United States | $19.8bn | 0.066% | +0.021 pp | -0.001 pp | +16.3% | 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.