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
Pharmaceuticals2.77%-1.46 ppHealth Care Equipment1.24%-1.46 ppBiotechnology1.31%-0.76 ppManaged Health Care0.64%-0.64 ppLife Sciences Tools & Services0.59%-0.41 ppHealth Care Services0.32%-0.23 ppHealth Care Distributors0.29%-0.16 ppHealth Care Facilities0.13%-0.08 ppHealth Care Supplies0.06%-0.04 ppHealth Care Technology0.02%-0.01 pp
3 · Sub-industry
Inside Health Care Equipment
Health Care Equipment · weight
1.24%
Industry change · 12M
-1.46 pp
Health Care Equipment · contribution
-1.457 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 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 |
|---|---|---|---|---|---|---|---|
| Abbott Laboratories → ABT | United States | $158.1bn | 0.215% | -0.149 pp | -0.332 pp | -29.1% | No |
| Boston Scientific → BSX | United States | $85.5bn | 0.116% | -0.149 pp | -0.249 pp | -44.0% | No |
| Intuitive Surgical → ISRG | United States | $162.1bn | 0.220% | -0.122 pp | -0.224 pp | -11.3% | No |
| Stryker Corporation → SYK | United States | $120.6bn | 0.164% | -0.107 pp | -0.179 pp | -14.9% | No |
| Medtronic → MDT | United States | $104.0bn | 0.141% | -0.111 pp | -0.120 pp | -1.4% | No |
| Becton Dickinson → BDX | United States | $42.4bn | 0.058% | -0.030 pp | -0.055 pp | -6.3% | No |
| ResMed| → RMD | United States | $31.1bn | 0.042% | -0.030 pp | -0.041 pp | -8.8% | No |
| Edwards Lifesciences → EW | United States | $48.5bn | 0.066% | -0.025 pp | -0.041 pp | +10.6% | No |
| GE HealthCare → GEHC | United States | $27.7bn | 0.038% | -0.031 pp | -0.040 pp | -13.3% | No |
| Dexcom → DXCM | United States | $23.0bn | 0.031% | -0.023 pp | -0.036 pp | -16.6% | No |
| Zimmer Biomet → ZBH | United States | $16.1bn | 0.022% | -0.011 pp | -0.027 pp | -19.2% | No |
| Insulet Corporation → PODD | United States | $12.1bn | 0.016% | -0.018 pp | -0.026 pp | -31.8% | No |
| Baxter International → BAX | United States | $9.1bn | 0.012% | -0.007 pp | -0.026 pp | -42.8% | No |
| Steris → STE | United States | $21.3bn | 0.029% | -0.020 pp | -0.024 pp | -2.8% | No |
| Idexx Laboratories → IDXX | United States | $44.7bn | 0.061% | -0.042 pp | -0.024 pp | +29.6% | No |
| Revvity → RVTY | United States | $9.7bn | 0.013% | -0.010 pp | -0.014 pp | -7.0% | 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.