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
Biotechnology3.08%-0.30 ppHealth Care Equipment2.98%+0.15 ppManaged Health Care2.08%+0.13 ppPharmaceuticals5.60%+0.10 ppLife Sciences Tools & Services1.54%+0.03 ppHealth Care Services0.68%-0.02 ppHealth Care Distributors0.50%-0.01 ppHealth Care Supplies0.14%+0.00 ppHealth Care Facilities0.21%+0.00 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Distributors
Health Care Distributors · weight
0.50%
Industry change · 12M
-0.01 pp
Health Care Distributors · contribution
-0.008 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2018 · 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 | $20.2bn | 0.124% | -0.007 pp | -0.007 pp | -9.9% | No |
| Henry Schein → HSIC | United States | $9.2bn | 0.056% | +0.003 pp | +0.003 pp | +0.4% | Yes |
| McKesson Corporation → MCK | United States | $32.2bn | 0.198% | -0.003 pp | -0.003 pp | -7.3% | Yes |
| Cencora → COR | United States | $19.9bn | 0.122% | -0.002 pp | -0.002 pp | -8.8% | 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.