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 Banks4.23%+1.60 ppInvestment Banking & Brokerage1.34%+0.66 ppFinancial Exchanges & Data1.10%+0.58 ppInsurance Brokers0.81%+0.54 ppProperty & Casualty Insurance0.99%+0.51 ppConsumer Finance0.72%+0.34 ppLife & Health Insurance0.58%+0.29 ppTransaction & Payment Processing Services1.62%+0.28 ppAsset Management & Custody Banks0.63%+0.27 ppRegional Banks0.45%+0.21 ppMulti-line Insurance0.26%+0.14 ppReinsurance0.04%+0.02 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.81%
Industry change · 12M
+0.54 pp
Insurance Brokers · contribution
+0.538 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 |
|---|---|---|---|---|---|---|---|
| Marsh McLennan → MRSH | United States | $85.7bn | 0.288% | +0.007 pp | +0.167 pp | +41.9% | Yes |
| Aon plc → AON | United States | $69.7bn | 0.234% | +0.022 pp | +0.133 pp | +42.6% | Yes |
| Willis Towers Watson → WTW | United States | $27.8bn | 0.094% | +0.094 pp | +0.094 pp | +4.6% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $36.4bn | 0.123% | +0.010 pp | +0.075 pp | +41.7% | Yes |
| Brown & Brown → BRO | United States | $20.4bn | 0.069% | +0.005 pp | +0.069 pp | +59.2% | 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.