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 Services0.73%-0.50 ppAsset Management & Custody Banks1.38%-0.30 ppInvestment Banking & Brokerage1.51%+0.26 ppInsurance Brokers0.55%-0.15 ppDiversified Banks3.74%-0.14 ppProperty & Casualty Insurance0.92%-0.12 ppFinancial Exchanges & Data0.96%-0.12 ppLife & Health Insurance0.35%-0.08 ppConsumer Finance0.78%+0.05 ppMulti-line Insurance0.14%-0.03 ppRegional Banks0.32%-0.01 ppReinsurance0.03%-0.01 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.55%
Industry change · 12M
-0.15 pp
Insurance Brokers · contribution
-0.155 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 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 | $92.2bn | 0.176% | +0.005 pp | -0.060 pp | -11.7% | No |
| Aon plc → AON | United States | $75.2bn | 0.144% | +0.000 pp | -0.035 pp | -5.1% | No |
| Arthur J. Gallagher & Co. → AJG | United States | $64.0bn | 0.123% | -0.003 pp | -0.025 pp | -16.7% | No |
| Brown & Brown → BRO | United States | $24.6bn | 0.047% | -0.006 pp | -0.019 pp | -30.7% | No |
| Willis Towers Watson → WTW | United States | $30.4bn | 0.058% | -0.001 pp | -0.016 pp | -2.6% | 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.