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
Biotechnology2.47%-0.61 ppPharmaceuticals5.81%+0.39 ppLife Sciences Tools & Services1.83%+0.29 ppHealth Care Services0.92%+0.27 ppHealth Care Equipment3.30%+0.23 ppHealth Care Distributors0.36%-0.07 ppManaged Health Care2.09%+0.03 ppHealth Care Supplies0.15%-0.02 ppHealth Care Facilities0.24%+0.02 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Equipment
Health Care Equipment · weight
3.30%
Industry change · 12M
+0.23 pp
Health Care Equipment · contribution
+0.231 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 | $134.3bn | 0.782% | -0.008 pp | +0.128 pp | +25.9% | Yes |
| Boston Scientific → BSX | United States | $53.4bn | 0.311% | -0.011 pp | +0.057 pp | +26.4% | Yes |
| Idexx Laboratories → IDXX | United States | $21.5bn | 0.125% | +0.020 pp | +0.015 pp | +20.0% | Yes |
| Medtronic → MDT | United States | $124.2bn | 0.723% | +0.019 pp | +0.013 pp | +9.1% | Yes |
| Baxter International → BAX | United States | $37.5bn | 0.218% | -0.004 pp | -0.012 pp | +4.5% | Yes |
| Edwards Lifesciences → EW | United States | $11.9bn | 0.069% | +0.001 pp | +0.011 pp | +24.3% | Yes |
| ResMed| → RMD | United States | $16.4bn | 0.095% | +0.010 pp | +0.006 pp | +12.6% | Yes |
| Revvity → RVTY | United States | $9.6bn | 0.056% | -0.005 pp | +0.006 pp | +16.5% | Yes |
| Becton Dickinson → BDX | United States | $48.3bn | 0.281% | -0.016 pp | +0.006 pp | +6.7% | Yes |
| Stryker Corporation → SYK | United States | $68.5bn | 0.399% | -0.008 pp | +0.004 pp | +6.5% | Yes |
| Zimmer Biomet → ZBH | United States | $22.7bn | 0.132% | -0.011 pp | -0.002 pp | +3.0% | Yes |
| Intuitive Surgical → ISRG | United States | $17.9bn | 0.104% | -0.017 pp | -0.001 pp | +1.1% | 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.