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
Pharmaceuticals4.86%-0.69 ppBiotechnology2.29%-0.52 ppLife Sciences Tools & Services1.59%-0.39 ppManaged Health Care2.25%-0.32 ppHealth Care Services0.65%-0.29 ppHealth Care Equipment2.84%-0.04 ppHealth Care Facilities0.21%-0.02 ppHealth Care Supplies0.14%+0.02 ppHealth Care Distributors0.43%+0.02 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.65%
Industry change · 12M
-0.29 pp
Health Care Services · contribution
-0.292 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 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 | $87.4bn | 0.273% | +0.006 pp | -0.182 pp | -31.1% | Yes |
| Cigna → CI | United States | $76.9bn | 0.240% | -0.021 pp | -0.101 pp | -18.7% | No |
| Quest Diagnostics → DGX | United States | $15.4bn | 0.048% | +0.001 pp | -0.011 pp | -7.8% | Yes |
| DaVita → DVA | United States | $9.3bn | 0.029% | -0.001 pp | +0.006 pp | +37.6% | Yes |
| Labcorp → LH | United States | $18.4bn | 0.057% | -0.001 pp | -0.005 pp | +6.3% | 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.