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
Latest available · not live
20182026
Universe›Health Care›Biotechnology›Biotechnology

1 · Sector

Weight and 12M allocation change

Information Technology43.1%+4.93 ppEnergy3.8%+1.55 ppHealth Care10.6%+0.26 ppMaterials1.9%-0.22 ppCommunication Services2.1%-0.27 ppReal Estate1.8%-0.35 ppIndustrials9.1%-0.58 ppUtilities2.1%-0.61 ppConsumer Staples5.4%-0.78 ppConsumer Discretionary10.3%-1.78 ppFinancials9.7%-2.16 pp

2 · Industry

Inside Health Care

Health Care Equipment1.52%-0.74 ppPharmaceuticals4.07%+0.69 ppBiotechnology2.04%+0.24 ppLife Sciences Tools & Services1.07%+0.17 ppHealth Care Technology0.10%+0.08 ppHealth Care Services0.41%-0.05 ppManaged Health Care0.82%-0.05 ppHealth Care Facilities0.16%-0.04 ppHealth Care Distributors0.37%-0.04 ppHealth Care Supplies0.08%-0.00 pp

3 · Sub-industry

Inside Biotechnology

Biotechnology2.04%+0.238 pp
Concentrated

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

View all contributions →
Biotechnology · weight
2.04%
Industry change · 12M
+0.24 pp
Biotechnology · contribution
+0.238 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Sep 2026 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Moderna →
MRNA
United States$76.9bn0.129%+0.081 pp+0.109 pp+645.5%Yes
Amgen →
AMGN
United States$227.9bn0.383%+0.043 pp+0.079 pp+53.5%Yes
AbbVie →
ABBV
United States$462.3bn0.777%+0.004 pp-0.042 pp+16.5%Yes
Gilead Sciences →
GILD
United States$184.8bn0.310%+0.038 pp+0.035 pp+37.6%Yes
Vertex Pharmaceuticals →
VRTX
United States$132.5bn0.223%+0.004 pp+0.022 pp+33.5%Yes
Biogen →
BIIB
United States$33.3bn0.056%+0.001 pp+0.015 pp+61.3%Yes
Regeneron Pharmaceuticals →
REGN
United States$71.2bn0.120%+0.018 pp+0.014 pp+35.6%Yes
Incyte →
INCY
United States$24.2bn0.041%+0.001 pp+0.008 pp+43.1%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.