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 Banks4.01%-0.70 ppTransaction & Payment Processing Services1.36%-0.45 ppProperty & Casualty Insurance1.11%+0.28 ppInsurance Brokers0.80%+0.12 ppAsset Management & Custody Banks0.58%-0.11 ppLife & Health Insurance0.61%+0.10 ppConsumer Finance0.59%-0.09 ppRegional Banks0.46%+0.02 ppInvestment Banking & Brokerage1.42%+0.01 ppReinsurance0.04%+0.01 ppMulti-line Insurance0.23%+0.01 ppFinancial Exchanges & Data1.16%+0.00 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.80%
Industry change · 12M
+0.12 pp
Insurance Brokers · contribution
+0.123 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 2022 · 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 |
|---|---|---|---|---|---|---|---|
| Willis Towers Watson → WTW | United States | $26.6bn | 0.090% | +0.009 pp | +0.090 pp | +10.6% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $42.0bn | 0.142% | +0.006 pp | +0.028 pp | +23.7% | Yes |
| Marsh McLennan → MRSH | United States | $85.9bn | 0.292% | +0.003 pp | +0.012 pp | +7.1% | Yes |
| Brown & Brown → BRO | United States | $16.9bn | 0.057% | -0.006 pp | -0.004 pp | -6.9% | No |
| Aon plc → AON | United States | $63.8bn | 0.216% | +0.006 pp | -0.004 pp | +5.0% | Yes |
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.