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%+2.63 ppTransaction & Payment Processing Services1.35%+1.34 ppInvestment Banking & Brokerage0.68%+0.68 ppFinancial Exchanges & Data0.52%+0.52 ppProperty & Casualty Insurance0.48%+0.48 ppConsumer Finance0.38%+0.38 ppAsset Management & Custody Banks0.36%+0.36 ppLife & Health Insurance0.30%+0.30 ppInsurance Brokers0.27%+0.27 ppRegional Banks0.23%+0.23 ppMulti-line Insurance0.12%+0.12 ppReinsurance0.02%+0.02 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.27%
Industry change · 12M
+0.27 pp
Insurance Brokers · contribution
+0.270 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2021 · 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 | $61.9bn | 0.121% | -0.119 pp | +0.121 pp | +43.4% | No |
| Aon plc → AON | United States | $52.0bn | 0.102% | -0.094 pp | +0.101 pp | +40.7% | No |
| Arthur J. Gallagher & Co. → AJG | United States | $24.2bn | 0.047% | -0.049 pp | +0.047 pp | +55.6% | 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.