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
Pharmaceuticals4.48%-1.87 ppBiotechnology2.08%-1.01 ppManaged Health Care2.04%-0.41 ppHealth Care Equipment3.24%-0.35 ppHealth Care Services0.87%-0.20 ppHealth Care Supplies0.28%+0.16 ppLife Sciences Tools & Services1.94%-0.07 ppHealth Care Distributors0.30%-0.07 ppHealth Care Facilities0.24%+0.03 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Supplies
Health Care Supplies · weight
0.28%
Industry change · 12M
+0.16 pp
Health Care Supplies · contribution
+0.161 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2021 · 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 |
|---|---|---|---|---|---|---|---|
| West Pharmaceutical Services → WST | United States | $24.3bn | 0.088% | +0.035 pp | +0.088 pp | +74.0% | Yes |
| Align Technology → ALGN | United States | $47.1bn | 0.171% | +0.072 pp | +0.076 pp | +177.2% | Yes |
| Cooper Companies (The) → COO | United States | $5.0bn | 0.018% | +0.008 pp | -0.003 pp | +43.3% | 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.