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 Supplies
Health Care Supplies · weight
0.08%
Industry change · 12M
-0.05 pp
Health Care Supplies · contribution
-0.050 pp
Company participation
67%
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 |
|---|---|---|---|---|---|---|---|
| West Pharmaceutical Services → WST | United States | $16.6bn | 0.032% | -0.008 pp | -0.023 pp | -32.0% | No |
| Align Technology → ALGN | United States | $11.7bn | 0.022% | +0.003 pp | -0.014 pp | -25.6% | Yes |
| Cooper Companies (The) → COO | United States | $15.9bn | 0.031% | +0.003 pp | -0.012 pp | -15.7% | 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.