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
Biotechnology2.40%-0.71 ppLife Sciences Tools & Services1.90%+0.35 ppHealth Care Services0.91%+0.25 ppHealth Care Equipment3.33%+0.23 ppManaged Health Care1.95%-0.16 ppPharmaceuticals5.61%+0.11 ppHealth Care Distributors0.37%-0.06 ppHealth Care Supplies0.14%-0.04 ppHealth Care Facilities0.25%+0.03 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Equipment
Health Care Equipment · weight
3.33%
Industry change · 12M
+0.23 pp
Health Care Equipment · contribution
+0.227 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 2019 · 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 |
|---|---|---|---|---|---|---|---|
| Abbott Laboratories → ABT | United States | $148.4bn | 0.800% | -0.007 pp | +0.151 pp | +40.3% | Yes |
| Boston Scientific → BSX | United States | $59.8bn | 0.322% | +0.017 pp | +0.048 pp | +31.4% | Yes |
| Stryker Corporation → SYK | United States | $76.8bn | 0.414% | -0.009 pp | +0.031 pp | +23.1% | Yes |
| Becton Dickinson → BDX | United States | $52.1bn | 0.281% | -0.015 pp | -0.017 pp | +6.5% | Yes |
| Baxter International → BAX | United States | $41.8bn | 0.225% | -0.014 pp | -0.015 pp | +12.1% | Yes |
| Idexx Laboratories → IDXX | United States | $23.7bn | 0.128% | +0.017 pp | +0.013 pp | +26.3% | Yes |
| Revvity → RVTY | United States | $10.7bn | 0.058% | -0.004 pp | +0.008 pp | +32.0% | Yes |
| Zimmer Biomet → ZBH | United States | $23.4bn | 0.126% | -0.019 pp | -0.007 pp | +6.5% | Yes |
| Edwards Lifesciences → EW | United States | $12.8bn | 0.069% | -0.007 pp | +0.007 pp | +26.9% | Yes |
| ResMed| → RMD | United States | $17.5bn | 0.094% | +0.009 pp | +0.005 pp | +19.5% | Yes |
| Medtronic → MDT | United States | $130.6bn | 0.704% | +0.002 pp | +0.002 pp | +15.7% | Yes |
| Intuitive Surgical → ISRG | United States | $20.2bn | 0.109% | -0.016 pp | -0.001 pp | +9.6% | 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.