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
Latest available · not live
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Health Care
Health Care Equipment1.52%-0.74 ppPharmaceuticals4.07%+0.69 ppBiotechnology2.04%+0.24 ppLife Sciences Tools & Services1.07%+0.17 ppHealth Care Technology0.10%+0.08 ppHealth Care Services0.41%-0.05 ppManaged Health Care0.82%-0.05 ppHealth Care Facilities0.16%-0.04 ppHealth Care Distributors0.37%-0.04 ppHealth Care Supplies0.08%-0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.41%
Industry change · 12M
-0.05 pp
Health Care Services · contribution
-0.046 pp
Company participation
40%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 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 | $71.8bn | 0.121% | -0.006 pp | -0.033 pp | -3.6% | No |
| CVS Health → CVS | United States | $109.6bn | 0.184% | -0.045 pp | -0.007 pp | +17.3% | No |
| Labcorp → LH | United States | $25.0bn | 0.042% | +0.002 pp | -0.006 pp | +8.4% | Yes |
| Quest Diagnostics → DGX | United States | $25.7bn | 0.043% | +0.002 pp | +0.001 pp | +24.4% | Yes |
| DaVita → DVA | United States | $11.2bn | 0.019% | -0.006 pp | -0.000 pp | +31.6% | 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.