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
Asset Management & Custody Banks1.67%+0.92 ppDiversified Banks3.87%+0.19 ppInvestment Banking & Brokerage1.26%+0.15 ppFinancial Exchanges & Data1.08%-0.14 ppConsumer Finance0.73%+0.09 ppProperty & Casualty Insurance1.05%-0.09 ppTransaction & Payment Processing Services1.23%-0.08 ppLife & Health Insurance0.43%-0.08 ppMulti-line Insurance0.17%-0.05 ppInsurance Brokers0.70%-0.05 ppReinsurance0.03%-0.02 ppRegional Banks0.33%+0.00 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.70%
Industry change · 12M
-0.05 pp
Insurance Brokers · contribution
-0.049 pp
Company participation
40%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 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 |
|---|---|---|---|---|---|---|---|
| Marsh McLennan → MRSH | United States | $106.5bn | 0.237% | -0.015 pp | -0.047 pp | +13.5% | No |
| Willis Towers Watson → WTW | United States | $33.2bn | 0.074% | +0.002 pp | -0.002 pp | +35.5% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $66.2bn | 0.147% | +0.002 pp | -0.002 pp | +31.2% | Yes |
| Brown & Brown → BRO | United States | $29.9bn | 0.067% | -0.004 pp | +0.001 pp | +35.7% | No |
| Aon plc → AON | United States | $80.2bn | 0.178% | -0.008 pp | +0.001 pp | +25.0% | 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.