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 Banks3.68%-0.36 ppInvestment Banking & Brokerage1.11%-0.30 ppAsset Management & Custody Banks0.76%+0.14 ppRegional Banks0.33%-0.13 ppTransaction & Payment Processing Services1.31%-0.12 ppLife & Health Insurance0.50%-0.10 ppInsurance Brokers0.75%-0.06 ppFinancial Exchanges & Data1.22%+0.03 ppConsumer Finance0.64%-0.02 ppMulti-line Insurance0.22%-0.01 ppReinsurance0.05%+0.00 ppProperty & Casualty Insurance1.13%-0.00 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.75%
Industry change · 12M
-0.06 pp
Insurance Brokers · contribution
-0.063 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2024 · 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 | $59.8bn | 0.178% | -0.033 pp | -0.048 pp | -5.6% | No |
| Willis Towers Watson → WTW | United States | $25.4bn | 0.076% | -0.007 pp | -0.019 pp | -1.7% | No |
| Marsh McLennan → MRSH | United States | $95.6bn | 0.284% | -0.034 pp | -0.013 pp | +12.4% | No |
| Brown & Brown → BRO | United States | $22.1bn | 0.066% | -0.002 pp | +0.009 pp | +33.4% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $50.1bn | 0.149% | -0.024 pp | +0.008 pp | +19.8% | 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.