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 Services0.81%-0.38 ppDiversified Banks3.93%+0.33 ppInvestment Banking & Brokerage1.48%+0.33 ppAsset Management & Custody Banks1.43%-0.18 ppConsumer Finance0.86%+0.17 ppInsurance Brokers0.57%-0.12 ppFinancial Exchanges & Data0.95%-0.10 ppProperty & Casualty Insurance0.98%-0.08 ppLife & Health Insurance0.35%-0.06 ppMulti-line Insurance0.16%-0.01 ppRegional Banks0.31%-0.01 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
-0.12 pp
Insurance Brokers · contribution
-0.120 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 | $90.9bn | 0.178% | -0.020 pp | -0.059 pp | -11.3% | No |
| Aon plc → AON | United States | $75.8bn | 0.149% | -0.005 pp | -0.028 pp | -1.2% | No |
| Brown & Brown → BRO | United States | $27.2bn | 0.053% | -0.009 pp | -0.013 pp | -21.4% | No |
| Arthur J. Gallagher & Co. → AJG | United States | $66.5bn | 0.130% | -0.029 pp | -0.011 pp | -8.0% | No |
| Willis Towers Watson → WTW | United States | $31.5bn | 0.062% | -0.006 pp | -0.010 pp | +6.1% | 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.