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 Banks2.63%-1.07 ppTransaction & Payment Processing Services0.51%-0.73 ppAsset Management & Custody Banks0.90%-0.57 ppProperty & Casualty Insurance0.70%-0.54 ppFinancial Exchanges & Data0.63%-0.51 ppInsurance Brokers0.38%-0.49 ppInvestment Banking & Brokerage1.03%-0.22 ppLife & Health Insurance0.24%-0.20 ppConsumer Finance0.50%-0.16 ppMulti-line Insurance0.11%-0.09 ppRegional Banks0.25%-0.06 ppReinsurance0.02%-0.02 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.38%
Industry change · 12M
-0.49 pp
Insurance Brokers · contribution
-0.486 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 | $84.0bn | 0.122% | -0.056 pp | -0.162 pp | -27.7% | No |
| Arthur J. Gallagher & Co. → AJG | United States | $55.7bn | 0.081% | -0.049 pp | -0.128 pp | -36.6% | No |
| Aon plc → AON | United States | $69.2bn | 0.101% | -0.048 pp | -0.104 pp | -18.8% | No |
| Brown & Brown → BRO | United States | $22.2bn | 0.032% | -0.021 pp | -0.052 pp | -47.2% | No |
| Willis Towers Watson → WTW | United States | $27.5bn | 0.040% | -0.022 pp | -0.040 pp | -13.0% | 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.