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 Equipment3.07%+0.24 ppManaged Health Care2.06%+0.10 ppPharmaceuticals5.41%-0.09 ppHealth Care Distributors0.43%-0.08 ppHealth Care Services0.65%-0.06 ppHealth Care Supplies0.18%+0.04 ppLife Sciences Tools & Services1.54%+0.03 ppHealth Care Facilities0.22%+0.01 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.65%
Industry change · 12M
-0.06 pp
Health Care Services · contribution
-0.060 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 | $64.4bn | 0.391% | -0.021 pp | -0.064 pp | -18.8% | No |
| DaVita → DVA | United States | $11.7bn | 0.071% | -0.008 pp | -0.011 pp | -14.4% | No |
| Labcorp → LH | United States | $15.9bn | 0.096% | +0.006 pp | +0.009 pp | +3.5% | Yes |
| Quest Diagnostics → DGX | United States | $14.5bn | 0.088% | +0.004 pp | +0.006 pp | +1.2% | 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.