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 Banks3.62%-0.31 ppInvestment Banking & Brokerage1.17%-0.24 ppAsset Management & Custody Banks0.77%+0.19 ppProperty & Casualty Insurance1.03%-0.14 ppLife & Health Insurance0.49%-0.12 ppRegional Banks0.33%-0.11 ppTransaction & Payment Processing Services1.26%-0.11 ppInsurance Brokers0.73%-0.09 ppFinancial Exchanges & Data1.21%+0.06 ppMulti-line Insurance0.21%-0.03 ppConsumer Finance0.60%+0.02 ppReinsurance0.05%-0.00 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.73%
Industry change · 12M
-0.09 pp
Insurance Brokers · contribution
-0.086 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 |
|---|---|---|---|---|---|---|---|
| Aon plc → AON | United States | $58.3bn | 0.174% | -0.046 pp | -0.050 pp | -2.3% | No |
| Willis Towers Watson → WTW | United States | $24.9bn | 0.074% | +0.001 pp | -0.021 pp | +0.1% | Yes |
| Marsh McLennan → MRSH | United States | $93.4bn | 0.279% | -0.035 pp | -0.018 pp | +16.1% | No |
| Brown & Brown → BRO | United States | $20.2bn | 0.060% | -0.006 pp | +0.002 pp | +25.7% | No |
| Arthur J. Gallagher & Co. → AJG | United States | $48.6bn | 0.145% | -0.019 pp | +0.001 pp | +20.5% | 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.