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
Pharmaceuticals3.42%-1.35 ppManaged Health Care0.84%-1.00 ppLife Sciences Tools & Services0.96%-0.47 ppBiotechnology1.80%-0.46 ppHealth Care Equipment2.41%-0.19 ppHealth Care Services0.47%-0.07 ppHealth Care Supplies0.09%-0.06 ppHealth Care Facilities0.20%-0.05 ppHealth Care Distributors0.39%+0.01 ppHealth Care Technology0.03%-0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.47%
Industry change · 12M
-0.07 pp
Health Care Services · contribution
-0.069 pp
Company participation
40%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 2025 · 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 | $80.3bn | 0.166% | -0.025 pp | -0.078 pp | -15.4% | No |
| CVS Health → CVS | United States | $92.8bn | 0.192% | +0.009 pp | +0.018 pp | +33.7% | Yes |
| DaVita → DVA | United States | $9.8bn | 0.020% | -0.003 pp | -0.010 pp | -8.7% | No |
| Labcorp → LH | United States | $23.1bn | 0.048% | +0.001 pp | +0.001 pp | +22.3% | Yes |
| Quest Diagnostics → DGX | United States | $20.3bn | 0.042% | -0.002 pp | -0.000 pp | +18.0% | 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.