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
Biotechnology3.08%-0.30 ppHealth Care Equipment2.98%+0.15 ppManaged Health Care2.08%+0.13 ppPharmaceuticals5.60%+0.10 ppLife Sciences Tools & Services1.54%+0.03 ppHealth Care Services0.68%-0.02 ppHealth Care Distributors0.50%-0.01 ppHealth Care Supplies0.14%+0.00 ppHealth Care Facilities0.21%+0.00 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.68%
Industry change · 12M
-0.02 pp
Health Care Services · contribution
-0.024 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2018 · 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 |
|---|---|---|---|---|---|---|---|
| CVS Health → CVS | United States | $70.8bn | 0.435% | -0.019 pp | -0.019 pp | -10.6% | Yes |
| DaVita → DVA | United States | $11.4bn | 0.070% | -0.011 pp | -0.011 pp | -19.5% | No |
| Labcorp → LH | United States | $14.9bn | 0.092% | +0.005 pp | +0.005 pp | -2.1% | Yes |
| Quest Diagnostics → DGX | United States | $13.7bn | 0.084% | +0.002 pp | +0.002 pp | -3.9% | 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.