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
Biotechnology2.84%-0.58 ppPharmaceuticals6.10%+0.56 ppHealth Care Equipment3.33%+0.45 ppHealth Care Services1.01%+0.35 ppLife Sciences Tools & Services1.82%+0.32 ppManaged Health Care2.16%+0.22 ppHealth Care Distributors0.39%-0.10 ppHealth Care Facilities0.28%+0.07 ppHealth Care Supplies0.14%-0.00 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
1.01%
Industry change · 12M
+0.35 pp
Health Care Services · contribution
+0.349 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 2019 · 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 | $66.3bn | 0.384% | +0.384 pp | +0.384 pp | -10.9% | Yes |
| DaVita → DVA | United States | $9.5bn | 0.055% | +0.018 pp | -0.024 pp | -21.0% | Yes |
| CVS Health → CVS | United States | $75.0bn | 0.435% | +0.163 pp | +0.023 pp | -12.0% | Yes |
| Labcorp → LH | United States | $12.6bn | 0.073% | +0.031 pp | -0.018 pp | -14.2% | Yes |
| Quest Diagnostics → DGX | United States | $11.6bn | 0.067% | +0.027 pp | -0.016 pp | -14.3% | 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.