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 Technology36.6%+3.08 ppIndustrials10.0%+0.39 ppCommunication Services2.7%+0.26 ppMaterials2.4%+0.12 ppEnergy2.5%+0.04 ppUtilities2.6%-0.06 ppReal Estate2.1%-0.26 ppConsumer Staples6.3%-0.46 ppConsumer Discretionary12.3%-0.81 ppFinancials11.4%-1.15 ppHealth Care11.0%-1.15 pp

2 · Industry

Inside Health Care

Managed Health Care0.73%-0.73 ppHealth Care Equipment2.13%-0.49 ppLife Sciences Tools & Services0.99%-0.21 ppPharmaceuticals4.08%+0.20 ppHealth Care Distributors0.44%+0.08 ppBiotechnology1.93%+0.08 ppHealth Care Supplies0.08%-0.05 ppHealth Care Services0.42%-0.04 ppHealth Care Facilities0.21%+0.03 ppHealth Care Technology0.03%-0.00 pp

3 · Sub-industry

Inside Biotechnology

Biotechnology1.93%+0.076 pp
Concentrated

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

View all contributions →
Biotechnology · weight
1.93%
Industry change · 12M
+0.08 pp
Biotechnology · contribution
+0.076 pp
Company participation
88%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Gilead Sciences →
GILD
United States$176.1bn0.337%+0.046 pp+0.068 pp+50.1%Yes
Vertex Pharmaceuticals →
VRTX
United States$119.2bn0.228%+0.014 pp-0.036 pp+1.8%Yes
AbbVie →
ABBV
United States$394.1bn0.754%-0.000 pp+0.032 pp+25.3%No
Amgen →
AMGN
United States$184.1bn0.352%+0.037 pp+0.011 pp+23.7%Yes
Regeneron Pharmaceuticals →
REGN
United States$69.7bn0.133%+0.013 pp-0.007 pp+10.8%Yes
Incyte →
INCY
United States$19.6bn0.038%+0.002 pp+0.006 pp+34.9%Yes
Biogen →
BIIB
United States$26.4bn0.050%+0.006 pp+0.004 pp+25.0%Yes
Moderna →
MRNA
United States$17.2bn0.033%+0.012 pp-0.001 pp+11.8%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.