Company lists · Data refreshed September 2026

Top 25 Office building owners based in Chicago, United States

Name: Office building owners based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 78 companies tracked

RevenueBase identified 78 office building owners headquartered in Chicago, United States as of September 2026 and tracks 3,870 professional contacts across them, including 1,126 with verified work emails. New York is the largest hub.

This list covers office building owners headquartered in Chicago, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

78Companies

3,870Contacts tracked

1,126Verified emails

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The 25 largest office building owners based in Chicago, United States

Ranked by team size

Top 25 of 78 office building owners based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to office building owners: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Revantage, A Blackstone Portfolio Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	501-1,000	621 contacts →
	Indirect evidence “A global corporate services leader proudly serving Blackstone Real Estate portfolio companies and investments.” Source: RevenueBase Database · checked Sep 17, 2026
2	East Lake	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	501-1,000	175 contacts →
	Partial evidence “East Lake is a leader in providing quality real estate services, including property, facilities & construction management, development, owner's representation, and program…” Source: RevenueBase Database · checked Sep 17, 2026
3	Sterling BAY	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	149 contacts →
	Indirect evidence “We are a national real estate company managing a portfolio that exceeds $5 billion in assets.” Source: RevenueBase Database · checked Sep 17, 2026
4	MB Real Estate	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	201-500	140 contacts →
	Indirect evidence “Working with MB Real Estate is about an independent mindset, and you are the focus.” Source: RevenueBase Database · checked Sep 17, 2026
5	Marc Realty	Strong evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	201-500	138 contacts →
	Strong evidence “Marc Realty is a full-service commercial real estate company that prides itself on owning, managing and leasing the best-located office buildings in the Chicago metropolitan area.” Source: RevenueBase Database · checked Sep 17, 2026
6	Expansive	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	134 contacts →
	Indirect evidence “Expansive creates exceptional workspaces where people and companies thrive.” Source: RevenueBase Database · checked Sep 17, 2026
7	Bradford Allen	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	129 contacts →
	Indirect evidence “Bradford Allen is a national commercial real estate firm headquartered in downtown Chicago.” Source: RevenueBase Database · checked Sep 17, 2026
8	Realty & Mortgage CO	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	11-50	88 contacts →
	Indirect evidence “Founded in 1906, Realty & Mortgage Co.” Source: RevenueBase Database · checked Sep 17, 2026
9	33 Realty	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	87 contacts →
	Indirect evidence “33 Realty is a fully integrated real estate services company with Leasing, Property Management, Distressed Real Estate Services and Investment and Sales Brokerage operations that…” Source: RevenueBase Database · checked Sep 17, 2026
10	EQ Office NOW Perform Properties	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	85 contacts →
	Partial evidence “While other real estate owners talk about square footage and floor plans, we focus on the experience.” Source: RevenueBase Database · checked Sep 17, 2026
11	Vanderbilt Office Properties	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	85 contacts →
	Partial evidence “Founded in 2014, Vanderbilt Office Properties, LLC is a privately held, vertically integrated real estate investment manager.” Source: RevenueBase Database · checked Sep 17, 2026
12	Urban Innovations	Indirect evidence	Chicago, United StatesHQ checked Sep 17, 2026	51-200	70 contacts →
	Indirect evidence “welcome to urban innovations Urban Innovations, Ltd.” Source: RevenueBase Database · checked Sep 17, 2026
13	The John Buck Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	70 contacts →
	Indirect evidence “Since 1981, The John Buck Company has reshaped the way real estate business is done.” Source: RevenueBase Database · checked Sep 17, 2026
14	Mccaffery	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	58 contacts →
	Partial evidence “McCaffery is a privately owned, full-service commercial real estate company that has been in the business of investing, developing, leasing and managing real estate for more than…” Source: RevenueBase Database · checked Sep 17, 2026
15	Glenstar	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	48 contacts →
	Partial evidence “Glenstar is a Chicago-based commercial real estate company specializing in industrial development, reimagined office and multi-family properties.” Source: RevenueBase Database · checked Sep 17, 2026
16	HSA Commercial Real Estate	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	43 contacts →
	Indirect evidence “Chicago-based HSA Commercial Real Estate is a diversified, national full-service commercial real estate firm that provides development, management, leasing and client services in…” Source: RevenueBase Database · checked Sep 17, 2026
17	Baum Realty Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	11-50	38 contacts →
	Indirect evidence “Chicago-based Baum Realty Group, LLC is a nationally regarded industry leader with more than 30 years of experience in commercial real estate brokerage.” Source: RevenueBase Database · checked Sep 17, 2026
18	Hansen Realty, INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	30 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
19	Fairbourne Properties	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	11-50	26 contacts →
	Partial evidence “Fairbourne Properties, LLC is a full service real estate investment and property management company focusing on acquiring, managing and asset managing office, retail, and…” Source: RevenueBase Database · checked Sep 17, 2026
20	HEARN	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	21 contacts →
	Partial evidence “HEARN has owned and operated institutional quality commercial real estate throughout the United States for over 40 years.” Source: RevenueBase Database · checked Sep 17, 2026
21	Equity Commonwealth	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	11-50	21 contacts →
	Partial evidence “Equity Commonwealth (NYSE: EQC) is a Chicago based, internally managed and self-advised real estate investment trust (REIT) with commercial office properties in the United States.” Source: RevenueBase Database · checked Sep 17, 2026
22	Inter Continental Real Estate & Development	Indirect evidence	Chicago, United StatesHQ checked Sep 17, 2026	11-50	19 contacts →
	Indirect evidence “Inter Continental Real Estate & Development Corporation (ICD) is a full-service real estate and development company, which has been in operation for over 35 years.” Source: RevenueBase Database · checked Sep 17, 2026
23	Rentlife LLC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	11-50	18 contacts →
	Indirect evidence “We are a passionate team of problem solvers.” Source: RevenueBase Database · checked Sep 17, 2026
24	Urban Investment Research Corporation Uirc	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	17 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
25	Telos Group, LLC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	11-50	16 contacts →
	Indirect evidence “The Telos Group provides leasing, marketing and consulting services in Chicago and consulting services for real estate businesses nationwide.” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: office building owners. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names office building owners.
Partial evidence: Its own public description names part of office building owners, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name office building owners. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 78 office building owners based in Chicago, United States

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Office building owners based in Chicago, United States at a glance

As of Sep 17, 2026

29.1%Verified-email coverage

49.6Average contacts per company

11-50Median size (employees)

223.1%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 78 companies.

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 office building owners, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Chicago, United States whose own description of what they do matches “office building owners”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names office building owners), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among office building owners, and records with no verified work email. Companies headquartered outside Chicago 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 its RevenueBase Smart Search 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, 1,126 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 17, 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.

Office building owners by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names office building owners, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many office building owners are there based in Chicago, United States?

RevenueBase identified 78 office building owners headquartered in Chicago, 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?

Revantage, A Blackstone Portfolio Company, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most office building owners?

New York leads with 174 headquartered companies, followed by Houston (89) and Los Angeles (83).

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 1,126 verified decision-maker contacts tracked across these 78 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 17, 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 Smart Search, 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.