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
Pharmaceuticals4.16%-0.96 ppLife Sciences Tools & Services1.08%-0.59 ppManaged Health Care1.31%-0.57 ppBiotechnology2.04%-0.33 ppHealth Care Equipment2.67%-0.31 ppHealth Care Services0.49%-0.18 ppHealth Care Facilities0.17%-0.07 ppHealth Care Distributors0.38%-0.06 ppHealth Care Supplies0.11%-0.04 ppHealth Care Technology0.03%+0.03 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.49%
Industry change · 12M
-0.18 pp
Health Care Services · contribution
-0.183 pp
Company participation
60%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 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 |
|---|---|---|---|---|---|---|---|
| Cigna → CI | United States | $84.5bn | 0.189% | -0.018 pp | -0.093 pp | -6.6% | No |
| CVS Health → CVS | United States | $82.9bn | 0.185% | +0.019 pp | -0.083 pp | -7.6% | Yes |
| DaVita → DVA | United States | $11.8bn | 0.026% | -0.004 pp | -0.005 pp | +16.5% | No |
| Labcorp → LH | United States | $21.0bn | 0.047% | +0.002 pp | -0.005 pp | +17.8% | Yes |
| Quest Diagnostics → DGX | United States | $19.2bn | 0.043% | +0.003 pp | +0.003 pp | +41.4% | 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.