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 Banks3.28%-0.66 ppInvestment Banking & Brokerage1.03%-0.34 ppTransaction & Payment Processing Services1.24%-0.21 ppRegional Banks0.28%-0.19 ppAsset Management & Custody Banks0.69%+0.14 ppFinancial Exchanges & Data1.13%+0.10 ppLife & Health Insurance0.52%-0.09 ppProperty & Casualty Insurance1.14%+0.09 ppInsurance Brokers0.85%+0.08 ppConsumer Finance0.53%-0.06 ppReinsurance0.06%+0.01 ppMulti-line Insurance0.22%-0.00 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.85%
Industry change · 12M
+0.08 pp
Insurance Brokers · contribution
+0.078 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 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 |
|---|---|---|---|---|---|---|---|
| Marsh McLennan → MRSH | United States | $93.5bn | 0.318% | +0.115 pp | +0.034 pp | +19.1% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $50.8bn | 0.173% | +0.073 pp | +0.033 pp | +27.2% | Yes |
| Brown & Brown → BRO | United States | $19.8bn | 0.067% | +0.024 pp | +0.008 pp | +19.2% | Yes |
| Aon plc → AON | United States | $61.9bn | 0.211% | +0.070 pp | +0.004 pp | +10.7% | Yes |
| Willis Towers Watson → WTW | United States | $24.4bn | 0.083% | +0.035 pp | -0.001 pp | +9.7% | 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.