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 Equipment1.61%-0.81 ppPharmaceuticals4.07%+0.65 ppBiotechnology1.99%+0.19 ppHealth Care Technology0.10%+0.08 ppHealth Care Facilities0.15%-0.04 ppHealth Care Services0.43%-0.04 ppLife Sciences Tools & Services0.93%-0.03 ppManaged Health Care0.85%+0.02 ppHealth Care Supplies0.08%-0.00 ppHealth Care Distributors0.38%-0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.43%
Industry change · 12M
-0.04 pp
Health Care Services · contribution
-0.040 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 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 | $73.0bn | 0.121% | -0.006 pp | -0.045 pp | -6.2% | Yes |
| CVS Health → CVS | United States | $120.1bn | 0.200% | -0.001 pp | +0.008 pp | +32.5% | Yes |
| Labcorp → LH | United States | $27.0bn | 0.045% | +0.008 pp | -0.003 pp | +20.9% | Yes |
| Quest Diagnostics → DGX | United States | $26.5bn | 0.044% | +0.007 pp | +0.002 pp | +34.6% | Yes |
| DaVita → DVA | United States | $11.2bn | 0.019% | -0.003 pp | -0.002 pp | +27.8% | 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.