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
Pharmaceuticals4.18%-0.85 ppLife Sciences Tools & Services1.10%-0.54 ppManaged Health Care1.52%-0.31 ppHealth Care Equipment2.69%-0.28 ppBiotechnology2.15%-0.21 ppHealth Care Services0.54%-0.16 ppHealth Care Supplies0.11%-0.10 ppHealth Care Facilities0.20%-0.04 ppHealth Care Technology0.03%+0.03 ppHealth Care Distributors0.43%-0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.54%
Industry change · 12M
-0.16 pp
Health Care Services · contribution
-0.162 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 | $90.0bn | 0.214% | +0.040 pp | -0.081 pp | -7.9% | Yes |
| CVS Health → CVS | United States | $85.4bn | 0.203% | +0.075 pp | -0.076 pp | -11.2% | Yes |
| Labcorp → LH | United States | $19.5bn | 0.046% | +0.003 pp | -0.005 pp | +7.9% | Yes |
| DaVita → DVA | United States | $12.2bn | 0.029% | +0.001 pp | -0.005 pp | +10.8% | Yes |
| Quest Diagnostics → DGX | United States | $18.8bn | 0.045% | +0.006 pp | +0.004 pp | +29.8% | Yes |
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.