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
Pharmaceuticals4.84%-0.57 ppBiotechnology2.27%-0.29 ppLife Sciences Tools & Services1.98%+0.19 ppHealth Care Services0.85%-0.18 ppHealth Care Supplies0.27%+0.15 ppManaged Health Care2.03%-0.08 ppHealth Care Distributors0.30%-0.03 ppHealth Care Facilities0.23%-0.02 ppHealth Care Equipment3.34%-0.01 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.85%
Industry change · 12M
-0.18 pp
Health Care Services · contribution
-0.183 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2020 · 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 | $89.4bn | 0.362% | +0.361 pp | -0.112 pp | -5.1% | Yes |
| Cigna → CI | United States | $75.2bn | 0.304% | +0.304 pp | -0.070 pp | +1.8% | Yes |
| Quest Diagnostics → DGX | United States | $16.1bn | 0.065% | +0.065 pp | -0.006 pp | +14.1% | Yes |
| DaVita → DVA | United States | $13.1bn | 0.053% | +0.053 pp | +0.005 pp | +56.5% | Yes |
| Labcorp → LH | United States | $17.0bn | 0.069% | +0.069 pp | -0.000 pp | +20.3% | 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.