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
Pharmaceuticals4.24%-0.80 ppLife Sciences Tools & Services1.01%-0.64 ppManaged Health Care1.28%-0.59 ppHealth Care Equipment2.70%-0.22 ppBiotechnology2.07%-0.21 ppHealth Care Services0.55%-0.13 ppHealth Care Supplies0.11%-0.08 ppHealth Care Facilities0.21%-0.03 ppHealth Care Technology0.03%+0.03 ppHealth Care Distributors0.45%+0.01 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.55%
Industry change · 12M
-0.13 pp
Health Care Services · contribution
-0.129 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 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 |
|---|---|---|---|---|---|---|---|
| Cigna → CI | United States | $93.1bn | 0.223% | +0.042 pp | -0.079 pp | -3.1% | Yes |
| CVS Health → CVS | United States | $84.1bn | 0.202% | +0.044 pp | -0.045 pp | +3.1% | Yes |
| DaVita → DVA | United States | $11.3bn | 0.027% | -0.005 pp | -0.008 pp | +1.8% | No |
| Quest Diagnostics → DGX | United States | $19.9bn | 0.048% | +0.007 pp | +0.003 pp | +31.6% | Yes |
| Labcorp → LH | United States | $20.2bn | 0.048% | +0.002 pp | -0.001 pp | +21.2% | 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.