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
Pharmaceuticals3.88%-1.03 ppBiotechnology1.85%-0.66 ppManaged Health Care1.46%-0.55 ppLife Sciences Tools & Services1.21%-0.43 ppHealth Care Equipment2.62%-0.39 ppHealth Care Services0.46%-0.22 ppHealth Care Distributors0.37%-0.08 ppHealth Care Facilities0.19%-0.06 ppHealth Care Technology0.03%+0.03 ppHealth Care Supplies0.13%-0.02 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.46%
Industry change · 12M
-0.22 pp
Health Care Services · contribution
-0.216 pp
Company participation
60%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 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 |
|---|---|---|---|---|---|---|---|
| CVS Health → CVS | United States | $71.1bn | 0.158% | -0.009 pp | -0.127 pp | -20.6% | No |
| Cigna → CI | United States | $81.8bn | 0.182% | -0.024 pp | -0.080 pp | -0.6% | No |
| Labcorp → LH | United States | $20.9bn | 0.046% | +0.002 pp | -0.010 pp | +13.8% | Yes |
| DaVita → DVA | United States | $14.4bn | 0.032% | +0.005 pp | +0.003 pp | +62.9% | Yes |
| Quest Diagnostics → DGX | United States | $18.2bn | 0.040% | -0.000 pp | -0.002 pp | +29.7% | 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.