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
Pharmaceuticals5.11%-0.44 ppLife Sciences Tools & Services1.52%-0.39 ppManaged Health Care2.39%-0.34 ppBiotechnology2.47%-0.26 ppHealth Care Services0.74%-0.19 ppHealth Care Equipment2.79%-0.11 ppHealth Care Distributors0.44%+0.02 ppHealth Care Facilities0.21%-0.02 ppHealth Care Supplies0.14%+0.01 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.74%
Industry change · 12M
-0.19 pp
Health Care Services · contribution
-0.190 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 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 | $88.6bn | 0.301% | +0.093 pp | -0.140 pp | -24.8% | Yes |
| Cigna → CI | United States | $91.5bn | 0.311% | +0.121 pp | -0.039 pp | -2.7% | Yes |
| Quest Diagnostics → DGX | United States | $14.6bn | 0.050% | +0.017 pp | -0.008 pp | -7.6% | Yes |
| Labcorp → LH | United States | $17.0bn | 0.058% | +0.016 pp | -0.003 pp | +6.1% | Yes |
| DaVita → DVA | United States | $7.1bn | 0.024% | +0.004 pp | +0.001 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.