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
Managed Health Care1.83%-0.37 ppBiotechnology2.35%-0.34 ppLife Sciences Tools & Services1.64%-0.32 ppHealth Care Equipment2.96%-0.17 ppHealth Care Distributors0.43%+0.05 ppPharmaceuticals5.03%+0.03 ppHealth Care Services0.70%-0.02 ppHealth Care Supplies0.20%+0.01 ppHealth Care Facilities0.24%-0.00 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.70%
Industry change · 12M
-0.02 pp
Health Care Services · contribution
-0.025 pp
Company participation
40%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2024 · 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 | $100.4bn | 0.278% | -0.025 pp | -0.047 pp | +11.0% | No |
| Cigna → CI | United States | $106.2bn | 0.294% | +0.033 pp | +0.035 pp | +44.7% | Yes |
| Quest Diagnostics → DGX | United States | $14.7bn | 0.041% | -0.005 pp | -0.013 pp | -3.9% | No |
| DaVita → DVA | United States | $12.1bn | 0.034% | +0.005 pp | +0.009 pp | +70.2% | Yes |
| Labcorp → LH | United States | $18.4bn | 0.051% | -0.007 pp | -0.009 pp | +12.3% | 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.