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
Pharmaceuticals2.77%-1.46 ppHealth Care Equipment1.24%-1.46 ppBiotechnology1.31%-0.76 ppManaged Health Care0.64%-0.64 ppLife Sciences Tools & Services0.59%-0.41 ppHealth Care Services0.32%-0.23 ppHealth Care Distributors0.29%-0.16 ppHealth Care Facilities0.13%-0.08 ppHealth Care Supplies0.06%-0.04 ppHealth Care Technology0.02%-0.01 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.32%
Industry change · 12M
-0.23 pp
Health Care Services · contribution
-0.229 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 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 | $76.9bn | 0.104% | -0.036 pp | -0.119 pp | -12.7% | No |
| CVS Health → CVS | United States | $106.0bn | 0.144% | -0.037 pp | -0.058 pp | +29.4% | No |
| Labcorp → LH | United States | $21.2bn | 0.029% | -0.014 pp | -0.020 pp | +7.7% | No |
| Quest Diagnostics → DGX | United States | $21.5bn | 0.029% | -0.011 pp | -0.019 pp | +10.9% | No |
| DaVita → DVA | United States | $10.4bn | 0.014% | -0.001 pp | -0.013 pp | +9.6% | 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.