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
Pharmaceuticals4.64%-0.39 ppBiotechnology2.35%-0.08 ppHealth Care Facilities0.27%+0.07 ppLife Sciences Tools & Services2.30%+0.06 ppHealth Care Equipment3.44%-0.04 ppHealth Care Distributors0.27%-0.04 ppManaged Health Care2.14%+0.03 ppHealth Care Services0.81%-0.03 ppHealth Care Supplies0.29%+0.01 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.81%
Industry change · 12M
-0.03 pp
Health Care Services · contribution
-0.030 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 2021 · 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 | $72.7bn | 0.243% | -0.027 pp | -0.048 pp | +29.6% | No |
| CVS Health → CVS | United States | $117.8bn | 0.394% | +0.022 pp | +0.046 pp | +63.2% | Yes |
| Quest Diagnostics → DGX | United States | $18.0bn | 0.060% | +0.001 pp | -0.018 pp | +22.4% | No |
| DaVita → DVA | United States | $10.5bn | 0.035% | -0.009 pp | -0.011 pp | +19.7% | No |
| Labcorp → LH | United States | $23.8bn | 0.079% | -0.006 pp | +0.000 pp | +43.7% | No |
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.