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
Health Care Equipment1.51%-1.12 ppPharmaceuticals3.80%+0.22 ppBiotechnology1.68%-0.18 ppLife Sciences Tools & Services0.80%-0.12 ppHealth Care Distributors0.34%-0.09 ppManaged Health Care0.86%-0.08 ppHealth Care Services0.42%-0.07 ppHealth Care Facilities0.15%-0.06 ppHealth Care Technology0.07%+0.04 ppHealth Care Supplies0.08%-0.01 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.42%
Industry change · 12M
-0.07 pp
Health Care Services · contribution
-0.065 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 | $73.4bn | 0.127% | +0.022 pp | -0.064 pp | -10.5% | Yes |
| CVS Health → CVS | United States | $116.1bn | 0.201% | +0.062 pp | +0.018 pp | +47.3% | Yes |
| Labcorp → LH | United States | $21.3bn | 0.037% | +0.004 pp | -0.010 pp | +5.6% | Yes |
| Quest Diagnostics → DGX | United States | $21.6bn | 0.037% | +0.005 pp | -0.006 pp | +14.5% | Yes |
| DaVita → DVA | United States | $12.5bn | 0.022% | +0.007 pp | -0.002 pp | +42.6% | 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.