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 Banks3.71%+1.04 ppAsset Management & Custody Banks1.44%+0.94 ppInvestment Banking & Brokerage1.31%+0.50 ppProperty & Casualty Insurance1.20%+0.38 ppFinancial Exchanges & Data1.11%+0.35 ppTransaction & Payment Processing Services1.13%+0.30 ppInsurance Brokers0.79%+0.27 ppConsumer Finance0.68%+0.22 ppRegional Banks0.30%+0.07 ppLife & Health Insurance0.39%+0.06 ppMulti-line Insurance0.18%+0.03 ppReinsurance0.03%+0.00 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.79%
Industry change · 12M
+0.27 pp
Insurance Brokers · contribution
+0.272 pp
Company participation
40%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 2025 · 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 | $89.0bn | 0.202% | +0.009 pp | +0.096 pp | +38.3% | Yes |
| Marsh McLennan → MRSH | United States | $115.1bn | 0.261% | -0.000 pp | +0.065 pp | +14.2% | Yes |
| Aon plc → AON | United States | $80.3bn | 0.182% | -0.016 pp | +0.065 pp | +33.1% | No |
| Brown & Brown → BRO | United States | $32.4bn | 0.073% | -0.002 pp | +0.025 pp | +26.8% | No |
| Willis Towers Watson → WTW | United States | $31.4bn | 0.071% | -0.005 pp | +0.021 pp | +25.5% | 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.