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
Financial Exchanges & Data0.78%-0.31 ppTransaction & Payment Processing Services0.70%-0.29 ppAsset Management & Custody Banks1.28%-0.27 ppInsurance Brokers0.50%-0.15 ppConsumer Finance0.66%-0.12 ppDiversified Banks3.72%-0.10 ppInvestment Banking & Brokerage1.49%+0.09 ppProperty & Casualty Insurance0.93%-0.07 ppRegional Banks0.35%+0.05 ppMulti-line Insurance0.14%-0.02 ppReinsurance0.03%-0.00 ppLife & Health Insurance0.36%+0.00 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.50%
Industry change · 12M
-0.15 pp
Insurance Brokers · contribution
-0.154 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jul 2026 · 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 | $90.5bn | 0.158% | +0.048 pp | -0.049 pp | -2.8% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $64.1bn | 0.112% | +0.040 pp | -0.043 pp | -12.2% | Yes |
| Aon plc → AON | United States | $76.5bn | 0.134% | +0.043 pp | -0.028 pp | +1.8% | Yes |
| Brown & Brown → BRO | United States | $23.6bn | 0.041% | +0.013 pp | -0.022 pp | -22.3% | Yes |
| Willis Towers Watson → WTW | United States | $31.2bn | 0.054% | +0.022 pp | -0.012 pp | +7.7% | Yes |
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.