Company lists · Data refreshed September 2026

Top 25 Media agencies and representatives based in the United States

Name: Media agencies and representatives based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 2,939 companies tracked

RevenueBase identified 2,939 media agencies and representatives headquartered in the United States as of September 2026 and tracks 120,526 professional contacts across them, including 40,702 with verified work emails and 41,402 with mobile numbers. New York is the largest hub.

This list covers media agencies and representatives headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

2,939Companies

120,526Contacts tracked

40,702Verified emails

41,402Mobile numbers

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The 25 largest media agencies and representatives based in the United States

Ranked by team size

Top 25 of 2,939 media agencies and representatives based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names media agencies and representatives: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	QUADIndirect evidence	Sussex, WI, United StatesHQ checked Sep 5, 2026	10001+	9,567
	“Quad (NYSE: QUAD) is a global marketing experience company that helps brands make direct consumer connections, from household to in-store to online.” Source: company website · checked Sep 5, 2026
2	GroupmIndirect evidence	NY, United StatesHQ checked Sep 5, 2026	10001+	8,120
	“We’ve rebranded!” Source: company website · checked Sep 5, 2026
3	StarcomPartial evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	5,001-10,000	5,520
	“With a history that dates back over 80 years, Starcom is a global communications planning and media leader.” Source: company website · checked Sep 5, 2026
4	IPG MediabrandsPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	10001+	4,963
	“IPG Mediabrands is the media and marketing solutions division of Interpublic Group (NYSE: IPG).” Source: company website · checked Sep 5, 2026
5	The Trade DeskIndirect evidence	Ventura, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	4,307
	“It's more than just clicks.” Source: company website · checked Sep 5, 2026
6	Omnicom Media GroupPartial evidence	New York, United StatesHQ checked Sep 5, 2026	10001+	3,989
	“Omnicom Media Group (OMG), the media services division of Omnicom Group Inc, delivers transformational experiences for consumers, clients, and talent.” Source: company website · checked Sep 5, 2026
7	InitiativeIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	5,001-10,000	2,980
	“Initiative unlocks business growth for the world’s most ambitious brands.” Source: company website · checked Sep 5, 2026
8	Spark FoundryPartial evidence	NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,822
	“As one of the fastest-growing global media agency networks, Spark Foundry is not beholden to legacy.” Source: company website · checked Sep 5, 2026
9	OMDPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	10001+	2,639
	“OMD is the world’s largest media network, with more than people working across more than 100 countries.” Source: company website · checked Sep 5, 2026
10	Horizon MediaPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,368
	“Horizon Media is a leader in driving business-based outcomes for marketers.” Source: company website · checked Sep 5, 2026
11	UM WorldwideIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,981
	“Our Stand Against Bland approach creates limitless possibilities, making everything we do intelligently driven, diversely courageous, business- and brand-obsessed, and dedicated…” Source: company website · checked Sep 5, 2026
12	VaynermediaPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,395
	“VaynerMedia is a contemporary global creative and media agency with an expertise in driving relevance for clients and delivering impactful business results.” Source: company website · checked Sep 5, 2026
13	Hearts & SciencePartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,359
	“Hearts & Science, an Omnicom Media Group agency, transforms data signals into meaningful connections between brands and consumers that drive exponential growth.” Source: company website · checked Sep 5, 2026
14	FreewheelIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,273
	“FreeWheel’s TV and video advertising technology is built for today’s ever-evolving multiscreen ecosystem.” Source: company website · checked Sep 5, 2026
15	TBCIndirect evidence	Baltimore, MD, United StatesHQ checked Sep 5, 2026	n/a	1,255
	“TBC is an independently owned, full-service branding, advertising and strategic communications agency with headquarters in Baltimore, Maryland, USA.” Source: company website · checked Sep 5, 2026
16	CMI Media GroupPartial evidence	Philadelphia, PA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,236
	“CMI Media Group, a WPP company, is a global, full-service media agency focused solely on health, wellness, life sciences and pharmaceutical marketing.” Source: company website · checked Sep 5, 2026
17	TinuitiPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,173
	“Tinuiti is a media agency that not only builds brands, but architects business outcomes.” Source: company website · checked Sep 5, 2026
18	MediaoceanIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,050
	“Mediaocean is powering the future of the advertising ecosystem with technology that empowers brands and agencies to deliver impactful omnichannel marketing experiences.” Source: company website · checked Sep 5, 2026
19	BrainlabsPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,010
	“Brainlabs is an independent, AI-native media agency built to grow client revenue and prove the impact of every dollar spent on media.” Source: company website · checked Sep 5, 2026
20	XR Extreme ReachIndirect evidence	Hudson Yards, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	940
	“XR Extreme Reach is the leading platform for managing advertising operations.” Source: company website · checked Sep 5, 2026
21	COX MediaPartial evidence	Atlanta, GA, United StatesHQ checked Sep 5, 2026	501-1,000	857
	“Cox Media is your partner for marketing success, offering advanced cable and digital advertising products in 22 markets across the United States.” Source: company website · checked Sep 5, 2026
22	EssenceIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	782
	“Formerly Essence, we are now EssenceMediacom.” Source: company website · checked Sep 5, 2026
23	KeplerIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	738
	“We’re on a mission to clarify the digital universe.” Source: company website · checked Sep 5, 2026
24	Mediahub WorldwidePartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	706
	“Mediahub is an award-winning global media agency and part of Omnicom Media.” Source: company website · checked Sep 5, 2026
25	InnovidIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	640
	“Innovid is the leading independent ad tech platform, empowering marketers to create, deliver, measure, and optimize ad-supported experiences that people love.” Source: company website · checked Sep 5, 2026

Showing 25 of 2,939 media agencies and representatives based in the United States

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Media agencies and representatives based in the United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 319 HQs

41,402Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

1,617

11-50

935

51-200

251

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

37,987

31–60

2,402

61–90

90–180

180+

282

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among media agencies and representatives, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “media agencies and representatives”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among media agencies and representatives, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 40,702 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Media agencies and representatives by metro

Frequently asked

How many media agencies and representatives are there based in the United States?

RevenueBase identified 2,939 media agencies and representatives headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

QUAD, headquartered in Sussex, tops this list with the largest team on record.

Which city has the most media agencies and representatives?

New York leads with 319 headquartered companies, followed by Los Angeles (156) and Chicago (73).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 40,702 verified decision-maker contacts tracked across these 2,939 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.