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 Banks7.98%-0.46 ppFinancial Exchanges & Data0.98%+0.13 ppInsurance Brokers0.55%+0.03 ppTransaction & Payment Processing Services1.55%+0.03 ppAsset Management & Custody Banks1.19%-0.02 ppInvestment Banking & Brokerage1.64%+0.02 ppMulti-line Insurance0.44%-0.01 ppConsumer Finance0.95%-0.01 ppRegional Banks0.79%+0.01 ppLife & Health Insurance0.85%+0.01 ppReinsurance0.06%+0.00 ppProperty & Casualty Insurance1.22%+0.00 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.55%
Industry change · 12M
+0.03 pp
Insurance Brokers · contribution
+0.031 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2018 · 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 | $35.1bn | 0.216% | +0.013 pp | +0.013 pp | +0.5% | Yes |
| Marsh McLennan → MRSH | United States | $41.4bn | 0.254% | +0.011 pp | +0.011 pp | -2.0% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $12.7bn | 0.078% | +0.008 pp | +0.008 pp | +3.1% | 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.