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%-1.15 ppPharmaceuticals3.09%-1.07 ppManaged Health Care0.52%-0.79 ppBiotechnology1.47%-0.57 ppLife Sciences Tools & Services0.66%-0.42 ppHealth Care Services0.32%-0.17 ppHealth Care Supplies0.07%-0.04 ppHealth Care Distributors0.35%-0.03 ppHealth Care Technology0.02%-0.01 ppHealth Care Facilities0.16%-0.01 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.32%
Industry change · 12M
-0.17 pp
Health Care Services · contribution
-0.167 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 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 | $76.4bn | 0.105% | -0.041 pp | -0.084 pp | -4.2% | No |
| CVS Health → CVS | United States | $101.7bn | 0.140% | -0.061 pp | -0.046 pp | +26.2% | No |
| Labcorp → LH | United States | $23.8bn | 0.033% | -0.011 pp | -0.014 pp | +16.4% | No |
| DaVita → DVA | United States | $10.4bn | 0.014% | -0.002 pp | -0.012 pp | +5.7% | No |
| Quest Diagnostics → DGX | United States | $23.3bn | 0.032% | -0.009 pp | -0.011 pp | +24.8% | 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.