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
Asset Management & Custody Banks1.44%+0.72 ppDiversified Banks3.65%-0.24 ppTransaction & Payment Processing Services1.18%-0.11 ppInvestment Banking & Brokerage1.28%+0.10 ppLife & Health Insurance0.42%-0.06 ppInsurance Brokers0.80%+0.04 ppMulti-line Insurance0.18%-0.04 ppRegional Banks0.30%-0.04 ppConsumer Finance0.66%-0.04 ppProperty & Casualty Insurance1.22%+0.03 ppReinsurance0.04%-0.01 ppFinancial Exchanges & Data1.12%+0.01 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.80%
Industry change · 12M
+0.04 pp
Insurance Brokers · contribution
+0.045 pp
Company participation
60%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 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 |
|---|---|---|---|---|---|---|---|
| Arthur J. Gallagher & Co. → AJG | United States | $81.7bn | 0.196% | +0.049 pp | +0.049 pp | +37.8% | Yes |
| Marsh McLennan → MRSH | United States | $111.1bn | 0.267% | +0.030 pp | -0.018 pp | +14.7% | Yes |
| Brown & Brown → BRO | United States | $31.7bn | 0.076% | +0.010 pp | +0.009 pp | +36.4% | Yes |
| Aon plc → AON | United States | $76.6bn | 0.184% | +0.006 pp | +0.006 pp | +26.5% | No |
| Willis Towers Watson → WTW | United States | $30.5bn | 0.073% | -0.001 pp | -0.001 pp | +24.0% | 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.