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 Services0.79%-0.41 ppInvestment Banking & Brokerage1.41%+0.20 ppInsurance Brokers0.57%-0.17 ppFinancial Exchanges & Data0.92%-0.15 ppProperty & Casualty Insurance0.98%-0.15 ppConsumer Finance0.82%+0.13 ppAsset Management & Custody Banks1.33%-0.11 ppLife & Health Insurance0.34%-0.10 ppRegional Banks0.29%-0.06 ppDiversified Banks3.75%+0.03 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
0.57%
Industry change · 12M
-0.17 pp
Insurance Brokers · contribution
-0.169 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 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 | $89.9bn | 0.177% | -0.033 pp | -0.076 pp | -20.1% | No |
| Aon plc → AON | United States | $76.1bn | 0.149% | -0.015 pp | -0.037 pp | -9.1% | No |
| Arthur J. Gallagher & Co. → AJG | United States | $63.6bn | 0.125% | -0.036 pp | -0.026 pp | -20.1% | No |
| Brown & Brown → BRO | United States | $27.5bn | 0.054% | -0.012 pp | -0.017 pp | -28.4% | No |
| Willis Towers Watson → WTW | United States | $30.7bn | 0.060% | -0.006 pp | -0.011 pp | +0.8% | 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.