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 Care1.83%-0.37 ppBiotechnology2.35%-0.34 ppLife Sciences Tools & Services1.64%-0.32 ppHealth Care Equipment2.96%-0.17 ppHealth Care Distributors0.43%+0.05 ppPharmaceuticals5.03%+0.03 ppHealth Care Services0.70%-0.02 ppHealth Care Supplies0.20%+0.01 ppHealth Care Facilities0.24%-0.00 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Biotechnology
Biotechnology · weight
2.35%
Industry change · 12M
-0.34 pp
Biotechnology · contribution
-0.336 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2024 · 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 |
|---|---|---|---|---|---|---|---|
| Gilead Sciences → GILD | United States | $91.3bn | 0.253% | -0.048 pp | -0.100 pp | -8.2% | No |
| Moderna → MRNA | United States | $40.7bn | 0.113% | -0.000 pp | -0.090 pp | -30.6% | Yes |
| AbbVie → ABBV | United States | $321.7bn | 0.892% | +0.076 pp | -0.070 pp | +18.9% | Yes |
| Biogen → BIIB | United States | $31.3bn | 0.087% | -0.025 pp | -0.050 pp | -22.4% | No |
| Vertex Pharmaceuticals → VRTX | United States | $108.0bn | 0.299% | -0.013 pp | +0.023 pp | +32.7% | No |
| Incyte → INCY | United States | $12.8bn | 0.035% | -0.006 pp | -0.020 pp | -21.2% | No |
| Amgen → AMGN | United States | $152.4bn | 0.423% | -0.037 pp | -0.018 pp | +21.6% | No |
| Regeneron Pharmaceuticals → REGN | United States | $90.4bn | 0.251% | +0.005 pp | -0.013 pp | +17.1% | 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.