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 Banks3.82%+1.21 ppAsset Management & Custody Banks1.55%+0.85 ppInvestment Banking & Brokerage1.40%+0.61 ppConsumer Finance0.78%+0.32 ppFinancial Exchanges & Data1.09%+0.29 ppProperty & Casualty Insurance1.00%+0.23 ppTransaction & Payment Processing Services0.99%+0.19 ppInsurance Brokers0.65%+0.12 ppRegional Banks0.31%+0.06 ppLife & Health Insurance0.36%+0.03 ppMulti-line Insurance0.15%+0.01 ppReinsurance0.03%-0.00 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.65%
Industry change · 12M
+0.12 pp
Insurance Brokers · contribution
+0.115 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jul 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 | $73.6bn | 0.155% | -0.041 pp | +0.044 pp | +2.1% | No |
| Aon plc → AON | United States | $76.7bn | 0.162% | -0.022 pp | +0.034 pp | +9.1% | No |
| Willis Towers Watson → WTW | United States | $31.3bn | 0.066% | -0.007 pp | +0.015 pp | +13.2% | No |
| Brown & Brown → BRO | United States | $30.1bn | 0.064% | -0.013 pp | +0.013 pp | -7.6% | No |
| Marsh McLennan → MRSH | United States | $97.9bn | 0.207% | -0.060 pp | +0.010 pp | -9.1% | 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.