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
Transaction & Payment Processing Services0.80%-0.38 ppAsset Management & Custody Banks1.31%+0.28 ppInvestment Banking & Brokerage1.38%+0.27 ppDiversified Banks3.74%+0.23 ppProperty & Casualty Insurance0.90%-0.22 ppFinancial Exchanges & Data0.89%-0.18 ppInsurance Brokers0.55%-0.17 ppConsumer Finance0.81%+0.17 ppLife & Health Insurance0.34%-0.09 ppRegional Banks0.28%-0.06 ppMulti-line Insurance0.15%-0.03 ppReinsurance0.03%-0.01 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.55%
Industry change · 12M
-0.17 pp
Insurance Brokers · contribution
-0.173 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 2025 · 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 | $87.3bn | 0.171% | -0.036 pp | -0.081 pp | -17.1% | No |
| Aon plc → AON | United States | $73.2bn | 0.143% | -0.018 pp | -0.043 pp | -6.4% | No |
| Arthur J. Gallagher & Co. → AJG | United States | $64.0bn | 0.125% | -0.030 pp | -0.020 pp | -10.6% | No |
| Brown & Brown → BRO | United States | $27.2bn | 0.053% | -0.010 pp | -0.017 pp | -23.4% | No |
| Willis Towers Watson → WTW | United States | $30.0bn | 0.059% | -0.007 pp | -0.013 pp | +4.8% | 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.