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
Health Care Equipment1.52%-1.02 ppPharmaceuticals4.10%+0.62 ppBiotechnology1.85%+0.08 ppLife Sciences Tools & Services0.83%-0.07 ppHealth Care Distributors0.37%-0.06 ppHealth Care Facilities0.15%-0.05 ppHealth Care Technology0.07%+0.05 ppHealth Care Services0.46%-0.03 ppManaged Health Care0.94%+0.02 ppHealth Care Supplies0.09%-0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.46%
Industry change · 12M
-0.03 pp
Health Care Services · contribution
-0.031 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 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 |
|---|---|---|---|---|---|---|---|
| Cigna → CI | United States | $72.9bn | 0.127% | +0.024 pp | -0.064 pp | -14.8% | Yes |
| CVS Health → CVS | United States | $132.0bn | 0.229% | +0.096 pp | +0.041 pp | +55.5% | Yes |
| Labcorp → LH | United States | $23.0bn | 0.040% | +0.008 pp | -0.007 pp | +7.8% | Yes |
| Quest Diagnostics → DGX | United States | $23.5bn | 0.041% | +0.009 pp | -0.002 pp | +20.1% | Yes |
| DaVita → DVA | United States | $14.3bn | 0.025% | +0.010 pp | +0.002 pp | +56.2% | 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.