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
Health Care Equipment1.41%-1.27 ppPharmaceuticals3.06%-1.12 ppManaged Health Care0.51%-1.01 ppBiotechnology1.45%-0.69 ppLife Sciences Tools & Services0.65%-0.44 ppHealth Care Services0.31%-0.22 ppHealth Care Distributors0.33%-0.10 ppHealth Care Facilities0.15%-0.05 ppHealth Care Supplies0.06%-0.04 ppHealth Care Technology0.02%-0.01 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.31%
Industry change · 12M
-0.22 pp
Health Care Services · contribution
-0.223 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2026 · 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 | $70.3bn | 0.102% | -0.042 pp | -0.111 pp | -17.2% | No |
| CVS Health → CVS | United States | $91.4bn | 0.133% | -0.064 pp | -0.070 pp | +10.1% | No |
| Labcorp → LH | United States | $22.0bn | 0.032% | -0.009 pp | -0.014 pp | +15.9% | No |
| DaVita → DVA | United States | $10.3bn | 0.015% | -0.001 pp | -0.014 pp | +0.5% | No |
| Quest Diagnostics → DGX | United States | $21.5bn | 0.031% | -0.006 pp | -0.013 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.