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 Care0.73%-0.73 ppHealth Care Equipment2.13%-0.49 ppLife Sciences Tools & Services0.99%-0.21 ppPharmaceuticals4.08%+0.20 ppHealth Care Distributors0.44%+0.08 ppBiotechnology1.93%+0.08 ppHealth Care Supplies0.08%-0.05 ppHealth Care Services0.42%-0.04 ppHealth Care Facilities0.21%+0.03 ppHealth Care Technology0.03%-0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.42%
Industry change · 12M
-0.04 pp
Health Care Services · contribution
-0.040 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2026 · 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 | $73.2bn | 0.140% | +0.012 pp | -0.042 pp | -4.9% | No |
| CVS Health → CVS | United States | $94.6bn | 0.181% | -0.013 pp | +0.023 pp | +37.0% | No |
| DaVita → DVA | United States | $7.7bn | 0.015% | -0.002 pp | -0.017 pp | -37.9% | No |
| Labcorp → LH | United States | $22.5bn | 0.043% | +0.002 pp | -0.003 pp | +9.9% | No |
| Quest Diagnostics → DGX | United States | $20.8bn | 0.040% | +0.001 pp | -0.001 pp | +16.8% | 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.