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›Communication Services›Advertising›Advertising

1 · Sector

Weight and 12M allocation change

Information Technology43.1%+4.93 pp Energy3.8%+1.55 pp Health Care10.6%+0.26 pp Materials1.9%-0.22 pp Communication Services2.1%-0.27 pp Real Estate1.8%-0.35 pp Industrials9.1%-0.58 pp Utilities2.1%-0.61 pp Consumer Staples5.4%-0.78 pp Consumer Discretionary10.3%-1.78 pp Financials9.7%-2.16 pp

2 · Industry

Inside Communication Services

Movies & Entertainment0.88%+0.29 pp Wireless Telecommunication Services0.29%-0.25 pp Integrated Telecommunication Services0.60%-0.17 pp Cable & Satellite0.13%-0.14 pp Broadcasting0.13%+0.03 pp Interactive Home Entertainment0.07%-0.03 pp Advertising0.04%+0.00 pp

3 · Sub-industry

Inside Advertising

Advertising0.04%+0.004 pp

Concentrated

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

View all contributions →

Advertising · weight

0.04%

Industry change · 12M

+0.00 pp

Advertising · contribution

+0.004 pp

Company participation

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Sep 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
Omnicom Group → OMC	United States	$21.0bn	0.035%	-0.001 pp	+0.004 pp	-5.9%	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.