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 Banks6.21%+2.29 ppTransaction & Payment Processing Services2.63%+1.59 ppFinancial Exchanges & Data1.14%+0.60 ppProperty & Casualty Insurance1.15%+0.51 ppInvestment Banking & Brokerage1.16%+0.45 ppConsumer Finance0.86%+0.37 ppInsurance Brokers0.63%+0.31 ppAsset Management & Custody Banks0.80%+0.27 ppLife & Health Insurance0.72%+0.25 ppRegional Banks0.52%+0.18 ppMulti-line Insurance0.33%+0.13 ppReinsurance0.06%+0.03 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.63%
Industry change · 12M
+0.31 pp
Insurance Brokers · contribution
+0.311 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2020 · 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 | $56.5bn | 0.278% | +0.006 pp | +0.132 pp | +29.1% | Yes |
| Aon plc → AON | United States | $51.6bn | 0.254% | +0.019 pp | +0.130 pp | +42.3% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $19.1bn | 0.094% | +0.006 pp | +0.049 pp | +40.0% | 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.