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 Banks3.84%+0.53 ppAsset Management & Custody Banks1.45%+0.49 ppInvestment Banking & Brokerage1.41%+0.40 ppTransaction & Payment Processing Services0.90%-0.21 ppConsumer Finance0.79%+0.16 ppFinancial Exchanges & Data0.94%-0.16 ppProperty & Casualty Insurance1.00%-0.13 ppLife & Health Insurance0.36%-0.09 ppInsurance Brokers0.64%-0.07 ppMulti-line Insurance0.15%-0.02 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
0.64%
Industry change · 12M
-0.07 pp
Insurance Brokers · contribution
-0.072 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 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 | $99.1bn | 0.198% | -0.034 pp | -0.057 pp | -8.3% | No |
| Aon plc → AON | United States | $76.9bn | 0.154% | -0.012 pp | -0.021 pp | +3.9% | No |
| Arthur J. Gallagher & Co. → AJG | United States | $79.4bn | 0.159% | -0.018 pp | +0.015 pp | +11.0% | No |
| Brown & Brown → BRO | United States | $30.9bn | 0.062% | -0.007 pp | -0.007 pp | -8.9% | No |
| Willis Towers Watson → WTW | United States | $33.7bn | 0.067% | +0.002 pp | -0.002 pp | +18.6% | 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.