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 Distributors
Health Care Distributors · weight
0.44%
Industry change · 12M
+0.08 pp
Health Care Distributors · contribution
+0.079 pp
Company participation
100%
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 |
|---|---|---|---|---|---|---|---|
| Cardinal Health → CAH | United States | $51.1bn | 0.098% | +0.009 pp | +0.031 pp | +75.9% | Yes |
| McKesson Corporation → MCK | United States | $102.6bn | 0.196% | -0.001 pp | +0.028 pp | +40.3% | Yes |
| Cencora → COR | United States | $69.7bn | 0.133% | +0.005 pp | +0.024 pp | +42.4% | Yes |
| Henry Schein → HSIC | United States | $8.9bn | 0.017% | +0.002 pp | -0.005 pp | -5.7% | 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.