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 Care2.28%-0.26 ppPharmaceuticals5.22%-0.24 ppHealth Care Services0.71%-0.20 ppLife Sciences Tools & Services1.85%-0.19 ppHealth Care Equipment3.34%+0.18 ppBiotechnology2.61%+0.11 ppHealth Care Facilities0.27%+0.03 ppHealth Care Distributors0.39%+0.01 ppHealth Care Supplies0.19%+0.01 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.71%
Industry change · 12M
-0.20 pp
Health Care Services · contribution
-0.196 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2023 · 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 | $94.1bn | 0.318% | -0.079 pp | -0.138 pp | -21.7% | No |
| Cigna → CI | United States | $75.2bn | 0.254% | -0.077 pp | -0.032 pp | +4.3% | No |
| Labcorp → LH | United States | $17.2bn | 0.058% | -0.007 pp | -0.011 pp | -4.6% | No |
| DaVita → DVA | United States | $8.2bn | 0.028% | +0.002 pp | -0.010 pp | -16.6% | Yes |
| Quest Diagnostics → DGX | United States | $15.5bn | 0.053% | -0.005 pp | -0.004 pp | +5.8% | 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.