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
Pharmaceuticals4.24%-0.80 ppLife Sciences Tools & Services1.01%-0.64 ppManaged Health Care1.28%-0.59 ppHealth Care Equipment2.70%-0.22 ppBiotechnology2.07%-0.21 ppHealth Care Services0.55%-0.13 ppHealth Care Supplies0.11%-0.08 ppHealth Care Facilities0.21%-0.03 ppHealth Care Technology0.03%+0.03 ppHealth Care Distributors0.45%+0.01 pp
3 · Sub-industry
Inside Health Care Distributors
Health Care Distributors · weight
0.45%
Industry change · 12M
+0.01 pp
Health Care Distributors · contribution
+0.011 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2025 · 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 | $89.3bn | 0.215% | +0.047 pp | +0.010 pp | +33.3% | Yes |
| Cardinal Health → CAH | United States | $34.1bn | 0.082% | +0.016 pp | +0.009 pp | +39.6% | Yes |
| Henry Schein → HSIC | United States | $8.1bn | 0.019% | -0.003 pp | -0.006 pp | -6.2% | No |
| Cencora → COR | United States | $56.8bn | 0.136% | +0.027 pp | -0.002 pp | +23.5% | 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.