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
Biotechnology2.47%-0.61 ppPharmaceuticals5.81%+0.39 ppLife Sciences Tools & Services1.83%+0.29 ppHealth Care Services0.92%+0.27 ppHealth Care Equipment3.30%+0.23 ppHealth Care Distributors0.36%-0.07 ppManaged Health Care2.09%+0.03 ppHealth Care Supplies0.15%-0.02 ppHealth Care Facilities0.24%+0.02 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.92%
Industry change · 12M
+0.27 pp
Health Care Services · contribution
+0.275 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 | $56.2bn | 0.327% | -0.057 pp | +0.327 pp | -12.6% | Yes |
| DaVita → DVA | United States | $7.2bn | 0.042% | -0.013 pp | -0.029 pp | -35.0% | No |
| Labcorp → LH | United States | $13.8bn | 0.080% | +0.007 pp | -0.016 pp | -10.0% | Yes |
| Quest Diagnostics → DGX | United States | $12.9bn | 0.075% | +0.008 pp | -0.013 pp | -8.0% | Yes |
| CVS Health → CVS | United States | $68.0bn | 0.396% | -0.039 pp | +0.005 pp | -14.7% | 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.