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
Universe›Health Care›Biotechnology›Biotechnology

1 · Sector

Weight and 12M allocation change

Information Technology28.3%+2.98 ppConsumer Discretionary12.3%+1.34 ppIndustrials9.9%+0.26 ppEnergy3.7%+0.18 ppMaterials2.9%-0.09 ppCommunication Services2.9%-0.40 ppReal Estate2.8%-0.49 ppUtilities2.8%-0.68 ppConsumer Staples7.1%-0.72 ppFinancials11.1%-0.86 ppHealth Care16.2%-1.52 pp

2 · Industry

Inside Health Care

Managed Health Care2.23%-0.48 ppPharmaceuticals5.26%-0.36 ppLife Sciences Tools & Services1.70%-0.33 ppHealth Care Services0.72%-0.26 ppBiotechnology2.53%-0.12 ppHealth Care Supplies0.18%+0.04 ppHealth Care Equipment2.91%-0.03 ppHealth Care Facilities0.22%+0.02 ppHealth Care Distributors0.42%+0.01 ppHealth Care Technology0.00%+0.00 pp

3 · Sub-industry

Inside Biotechnology

Biotechnology2.53%-0.121 pp
Concentrated

Most of this industry's losses came from a few companies.

View all contributions →
Biotechnology · weight
2.53%
Industry change · 12M
-0.12 pp
Biotechnology · contribution
-0.121 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Sep 2023 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
AbbVie →
ABBV
United States$263.1bn0.879%+0.329 pp-0.054 pp+15.6%Yes
Moderna →
MRNA
United States$39.3bn0.131%+0.024 pp-0.051 pp-12.7%Yes
Biogen →
BIIB
United States$37.2bn0.124%+0.029 pp-0.028 pp-3.7%Yes
Incyte →
INCY
United States$12.9bn0.043%+0.011 pp-0.015 pp-13.3%Yes
Gilead Sciences →
GILD
United States$93.4bn0.312%+0.090 pp+0.008 pp+26.1%Yes
Vertex Pharmaceuticals →
VRTX
United States$89.7bn0.300%+0.090 pp+0.008 pp+20.1%Yes
Amgen →
AMGN
United States$143.8bn0.480%+0.206 pp+0.006 pp+23.3%Yes
Regeneron Pharmaceuticals →
REGN
United States$77.3bn0.258%+0.102 pp+0.004 pp+19.5%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.