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 Equipment1.52%-1.02 ppPharmaceuticals4.10%+0.62 ppBiotechnology1.85%+0.08 ppLife Sciences Tools & Services0.83%-0.07 ppHealth Care Distributors0.37%-0.06 ppHealth Care Facilities0.15%-0.05 ppHealth Care Technology0.07%+0.05 ppHealth Care Services0.46%-0.03 ppManaged Health Care0.94%+0.02 ppHealth Care Supplies0.09%-0.00 pp
3 · Sub-industry
Inside Health Care Distributors
Health Care Distributors · weight
0.37%
Industry change · 12M
-0.06 pp
Health Care Distributors · contribution
-0.061 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 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 |
|---|---|---|---|---|---|---|---|
| McKesson Corporation → MCK | United States | $90.8bn | 0.158% | +0.003 pp | -0.040 pp | +3.5% | No |
| Cencora → COR | United States | $55.1bn | 0.096% | +0.007 pp | -0.030 pp | -4.9% | No |
| Cardinal Health → CAH | United States | $55.9bn | 0.097% | +0.025 pp | +0.011 pp | +43.0% | Yes |
| Henry Schein → HSIC | United States | $9.5bn | 0.017% | +0.004 pp | -0.003 pp | +14.3% | 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.