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
Pharmaceuticals3.66%-1.84 ppBiotechnology1.77%-1.61 ppHealth Care Equipment1.89%-0.94 ppManaged Health Care1.28%-0.67 ppLife Sciences Tools & Services0.97%-0.54 ppHealth Care Services0.35%-0.36 ppHealth Care Distributors0.21%-0.29 ppHealth Care Supplies0.07%-0.07 ppHealth Care Facilities0.15%-0.05 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Equipment
Health Care Equipment · weight
1.89%
Industry change · 12M
-0.94 pp
Health Care Equipment · contribution
-0.937 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 |
|---|---|---|---|---|---|---|---|
| Medtronic → MDT | United States | $122.2bn | 0.437% | +0.013 pp | -0.226 pp | +7.7% | No |
| Abbott Laboratories → ABT | United States | $127.0bn | 0.454% | +0.044 pp | -0.163 pp | +17.9% | No |
| Stryker Corporation → SYK | United States | $58.7bn | 0.210% | -0.002 pp | -0.141 pp | -3.5% | No |
| Baxter International → BAX | United States | $35.0bn | 0.125% | -0.006 pp | -0.099 pp | -7.7% | No |
| Becton Dickinson → BDX | United States | $46.4bn | 0.166% | -0.005 pp | -0.077 pp | -6.1% | No |
| Zimmer Biomet → ZBH | United States | $20.5bn | 0.073% | -0.009 pp | -0.069 pp | -17.7% | No |
| Boston Scientific → BSX | United States | $48.9bn | 0.175% | +0.005 pp | -0.044 pp | +26.4% | No |
| Idexx Laboratories → IDXX | United States | $16.0bn | 0.057% | -0.012 pp | -0.036 pp | -0.5% | No |
| Intuitive Surgical → ISRG | United States | $18.2bn | 0.065% | -0.004 pp | -0.027 pp | +10.9% | No |
| ResMed| → RMD | United States | $16.2bn | 0.058% | +0.006 pp | -0.024 pp | +14.6% | No |
| Revvity → RVTY | United States | $8.7bn | 0.031% | -0.003 pp | -0.019 pp | -1.8% | No |
| Edwards Lifesciences → EW | United States | $10.7bn | 0.038% | -0.001 pp | -0.013 pp | +21.0% | No |
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.