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 Banks2.64%-1.01 ppTransaction & Payment Processing Services0.50%-0.68 ppProperty & Casualty Insurance0.66%-0.56 ppFinancial Exchanges & Data0.60%-0.52 ppAsset Management & Custody Banks0.94%-0.50 ppInsurance Brokers0.33%-0.46 ppInvestment Banking & Brokerage1.05%-0.23 ppLife & Health Insurance0.24%-0.18 ppConsumer Finance0.50%-0.17 ppMulti-line Insurance0.10%-0.08 ppRegional Banks0.26%-0.04 ppReinsurance0.02%-0.02 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.33%
Industry change · 12M
-0.46 pp
Insurance Brokers · contribution
-0.464 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2026 · 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 | $80.8bn | 0.110% | -0.067 pp | -0.157 pp | -24.2% | No |
| Arthur J. Gallagher & Co. → AJG | United States | $53.1bn | 0.072% | -0.051 pp | -0.124 pp | -35.0% | No |
| Aon plc → AON | United States | $66.8bn | 0.091% | -0.053 pp | -0.093 pp | -11.8% | No |
| Brown & Brown → BRO | United States | $20.4bn | 0.028% | -0.019 pp | -0.048 pp | -45.2% | No |
| Willis Towers Watson → WTW | United States | $24.2bn | 0.033% | -0.025 pp | -0.040 pp | -15.8% | 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.