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 Health Care
Managed Health Care0.84%-0.55 ppPharmaceuticals4.11%+0.28 ppHealth Care Equipment2.25%-0.18 ppLife Sciences Tools & Services1.03%-0.12 ppBiotechnology1.91%+0.12 ppHealth Care Distributors0.44%+0.09 ppHealth Care Supplies0.09%-0.04 ppHealth Care Facilities0.21%+0.04 ppHealth Care Services0.44%+0.02 ppHealth Care Technology0.03%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.44%
Industry change · 12M
+0.02 pp
Health Care Services · contribution
+0.024 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 |
|---|---|---|---|---|---|---|---|
| CVS Health → CVS | United States | $100.7bn | 0.197% | +0.006 pp | +0.069 pp | +84.3% | Yes |
| Cigna → CI | United States | $73.5bn | 0.144% | -0.010 pp | -0.030 pp | +1.7% | No |
| DaVita → DVA | United States | $8.0bn | 0.016% | -0.003 pp | -0.012 pp | -24.0% | No |
| Labcorp → LH | United States | $20.8bn | 0.041% | -0.007 pp | -0.003 pp | +10.6% | No |
| Quest Diagnostics → DGX | United States | $19.3bn | 0.038% | -0.005 pp | -0.000 pp | +17.2% | 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.