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%-0.51 ppInvestment Banking & Brokerage1.11%-0.23 ppTransaction & Payment Processing Services1.29%-0.23 ppRegional Banks0.31%-0.16 ppConsumer Finance0.54%-0.07 ppAsset Management & Custody Banks0.49%-0.07 ppLife & Health Insurance0.50%-0.05 ppFinancial Exchanges & Data1.15%+0.05 ppInsurance Brokers0.82%+0.04 ppMulti-line Insurance0.20%-0.02 ppReinsurance0.05%+0.01 ppProperty & Casualty Insurance0.97%+0.00 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.82%
Industry change · 12M
+0.04 pp
Insurance Brokers · contribution
+0.036 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 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 | $49.7bn | 0.158% | +0.052 pp | +0.022 pp | +28.7% | Yes |
| Marsh McLennan → MRSH | United States | $96.3bn | 0.307% | +0.095 pp | +0.019 pp | +22.6% | Yes |
| Willis Towers Watson → WTW | United States | $21.7bn | 0.069% | +0.012 pp | -0.012 pp | +1.4% | Yes |
| Aon plc → AON | United States | $67.6bn | 0.216% | +0.060 pp | +0.005 pp | +20.3% | Yes |
| Brown & Brown → BRO | United States | $21.0bn | 0.067% | +0.023 pp | +0.003 pp | +18.4% | 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.