Exhibit 99.1

Jones Lang LaSalle Reports First-Quarter 2011 Results

Revenue of $688 million, up 18 percent from the first quarter of 2010

CHICAGO, April 26, 2011 – Jones Lang LaSalle Incorporated (NYSE: JLL) today reported net income of $1.5 million on a U.S. GAAP basis, or $0.03 per share, for the quarter ended March 31, 2011, compared with net income of $0.2 million on a U.S. GAAP basis, or $0.01 per share, for the quarter ended March 31, 2010. Revenue for the first quarter of 2011 was $688 million, an increase of 18 percent in U.S. dollars, 16 percent in local currency, compared with the first quarter of 2010. The firm’s earnings before interest, taxes, depreciation and amortization (“EBITDA”) were $28 million for the first quarter of 2011 compared with EBITDA of $29 million for the same period in 2010.

First-Quarter 2011 Highlights:

“Positive year-over-year revenue performance continued in the first quarter with good momentum building in our businesses,” said Colin Dyer, President and Chief Executive Officer of Jones Lang LaSalle. “Our healthy new business pipelines across the globe make us optimistic about our revenue and profit prospects as we move into the seasonally stronger quarters of the year,” Dyer added.

Jones Lang LaSalle Reports First-Quarter 2011 Results – Page 2

Consolidated Business Line Revenue Comparison (in millions)

Operating expenses were $676 million for the first quarter, an increase of 20 percent, 18 percent in local currency, compared with operating expenses excluding Restructuring charges in 2010. The year-over-year increase was principally driven by variable costs to support revenue growth and by certain unusual expense items. These unusual items, while not classified as Restructuring charges, totaled more than $9 million and included accelerated compensation costs from acquisitions, reserves for third-party claims and a large contribution to Japanese disaster relief. Since the unusual items were incurred in the firm’s seasonally slowest quarter of the year, they impacted operating income and EBITDA margins more significantly than if they had been incurred in a later quarter.

Balance Sheet and Dividend

The firm’s net debt position, which includes deferred acquisition obligations, decreased by $184 million compared with March 31, 2010, to $512 million. Outstanding debt on the firm’s long-term credit facility decreased by $57 million compared with a year ago, to $278 million at quarter end.

The firm announced that its Board of Directors declared a semi-annual dividend of $0.15 per share, an increase from the $0.10 per share dividend payment made in December 2010. The dividend payment will be made on June 15, 2011, to holders of record at the close of business on May 16, 2011.

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Jones Lang LaSalle Reports First-Quarter 2011 Results – Page 3

Business Segment First-Quarter Performance Highlights

Americas Real Estate Services

First-quarter revenue in the Americas region was $288 million, an increase of $60 million, or 26 percent, over the prior year. Leasing revenue grew 35 percent, demonstrating the strength and scale of Americas’ leasing business. Capital Markets and Hotels also generated strong growth in the quarter, more than doubling to $20 million.

n/m – not meaningful

Operating expenses were $279 million in the first quarter, 27 percent higher than a year ago. The increase was largely due to higher incentive compensation expense and, to a lesser extent, the accounting treatment of approximately $3 million of accelerated compensation costs associated with acquisitions. Variable operating expenses such as Travel & Entertainment and Marketing also were higher as revenue-generating activities increased commensurate with stronger pipelines of future business. EBITDA increased to $19 million from $18 million in the first quarter of 2010.

EMEA Real Estate Services

EMEA’s revenue in the first quarter of 2011 was $168 million compared with $151 million in 2010, an increase of 11 percent, 10 percent in local currency. The most significant component of the revenue increase was in Project & Development Services (“PDS”), which includes the Tetris fit-out business where gross contracts include subcontractor costs. Market recoveries across the region continued to be mixed, resulting in varied performance from one country to the next. Performance in our three biggest countries, Germany, England and France, continued to be strong.

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Jones Lang LaSalle Reports First-Quarter 2011 Results – Page 4

n/m – not meaningful

Operating expenses were $181 million in the first quarter, an increase of 13 percent from the prior year, 11 percent in local currency. Subcontractor costs related to the PDS business line increased by more than $8 million compared to the prior year. Variable compensation, driven by higher revenue, and operating costs, driven by a greater level of revenue-generating activities, also contributed to the increase. EBITDA was a loss of $8 million, compared with a loss of $5 million in the first quarter of 2010.

Asia Pacific Real Estate Services

Revenue in Asia Pacific was $165 million for the first quarter of 2011, compared with $136 million for the same period in 2010, an increase of 22 percent, 15 percent in local currency. The year-over-year increase was largely driven by growth in India, Greater China and Australia.

n/m – not meaningful

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Jones Lang LaSalle Reports First-Quarter 2011 Results – Page 5

Operating expenses for the region were $160 million for the quarter, an increase of 23 percent, 15 percent in local currency on a year-over-year basis. The increase was principally due to staff and vendor costs that related to a higher volume of PDS work as well as other corporate client activities. Unusual expense items related to the region included the firm’s $1.3 million donation for disaster relief in Japan. EBITDA totaled $8 million, consistent with the first quarter of 2010.

LaSalle Investment Management

LaSalle Investment Management’s first-quarter Advisory fees were $61 million, 5 percent higher compared with the first quarter of 2010, primarily related to favorable valuation increases in the securities business. The business also recognized $2 million of Transaction fees from asset purchases in the first quarter of 2011.

n/m – not meaningful

During the quarter, LaSalle Investment Management raised $1.5 billion of net equity, primarily in equity commitments from separate account clients and in the public securities business. Assets under management were $43.0 billion, compared with $41.3 billion at December 31, 2010. EBITDA was $10 million, an increase from $9 million in the first quarter of 2010.

Summary

The firm’s revenue growth momentum continued in the first quarter of 2011 and prospects for the remainder of 2011 are positive. The firm’s corporate clients are showing increased confidence to make decisions, pipelines are robust and LaSalle continues to perform well and raise capital. The balance sheet remains strong and the firm is well positioned to take advantage of a consolidating industry.

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Jones Lang LaSalle Reports First-Quarter 2011 Results – Page 6

About Jones Lang LaSalle

Jones Lang LaSalle (NYSE: JLL) is a financial and professional services firm specializing in real estate. The firm offers integrated services delivered by expert teams worldwide to clients seeking increased value by owning, occupying or investing in real estate. With 2010 global revenue of more than $2.9 billion, Jones Lang LaSalle serves clients in 60 countries from 1,000 locations worldwide, including 185 corporate offices. The firm is an industry leader in property and corporate facility management services, with a portfolio of approximately 1.8 billion square feet worldwide. LaSalle Investment Management, the company’s investment management business, is one of the world’s largest and most diverse in real estate with more than $43 billion of assets under management. For further information, please visit the company’s website, www.joneslanglasalle.com.

200 East Randolph Drive Chicago Illinois 60601

22 Hanover Square London W1A 2BN

9 Raffles Place #39–00 Republic Plaza Singapore 048619

Statements in this press release regarding, among other things, future financial results and performance, achievements, plans and objectives and dividend payments may be considered forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve known and unknown risks, uncertainties and other factors which may cause actual results, performance, achievements, plans and objectives of Jones Lang LaSalle to be materially different from those expressed or implied by such forward-looking statements. Factors that could cause actual results to differ materially include those discussed under “Business,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Quantitative and Qualitative Disclosures about Market Risk,” and elsewhere in Jones Lang LaSalle’s Annual Report on Form 10-K for the year ended December 31, 2010, and in other reports filed with the Securities and Exchange Commission. There can be no assurance that future dividends will be declared since the actual declaration of future dividends, and the establishment of record and payment dates, remains subject to final determination by the Company’s Board of Directors. Statements speak only as of the date of this release. Jones Lang LaSalle expressly disclaims any obligation or undertaking to update or revise any forward-looking statements contained herein to reflect any change in Jones Lang LaSalle’s expectations or results, or any change in events.

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Jones Lang LaSalle Reports First-Quarter 2011 Results – Page 7

Conference Call

The firm will conduct a conference call for shareholders, analysts and investment professionals on Wednesday, April 27 at 9:00 a.m. EDT.

To participate in the teleconference, please dial into one of the following phone numbers five to 10 minutes before the start time:

Webcast

Follow these steps to listen to the webcast:

1. You must have a minimum 14.4 Kbps Internet connection

2. Log on to http://www.videonewswire.com/event.asp?id=78464 and follow instructions

3. Download free Windows Media Player software: (link located under registration form)

4. If you experience problems listening, send an e-mail to prnwebcast@multivu.com

Supplemental Information

Supplemental information regarding the first quarter 2011 earnings call has been posted to the Investor Relations section of the company’s website: www.joneslanglasalle.com.

Conference Call Replay

Available: 12:00 p.m. EDT Wednesday, April 27 through 11:59 p.m. EDT May 4 at the following numbers:

Web Audio Replay

Audio replay will be available for download or stream. This information and link is also available on the company’s website: www.joneslanglasalle.com.

If you have any questions, call Yvonne Peterson of Jones Lang LaSalle’s Investor Relations department at +1 312 228 2919.

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JONES LANG LASALLE INCORPORATED

Consolidated Statements of Operations

For the Three Months Ended March 31, 2011 and 2010

(in thousands, except share data)

(Unaudited)

Please reference attached financial statement notes.

JONES LANG LASALLE INCORPORATED

Segment Operating Results

For the Three Months Ended March 31, 2011 and 2010

(in thousands)

(Unaudited)

Please reference attached financial statement notes.

JONES LANG LASALLE INCORPORATED

Consolidated Balance Sheets

March 31, 2011, December 31, 2010 and March 31, 2010

(in thousands)

Please reference attached financial statement notes.

JONES LANG LASALLE INCORPORATED

Summarized Consolidated Statements of Cash Flows

For the Three Months Ended March 31, 2011 and 2010

(in thousands)

(Unaudited)

JONES LANG LASALLE INCORPORATED

Financial Statement Notes

Below is a reconciliation of net income to EBITDA (in thousands):

Below is a reconciliation of net cash used in operating activities, the most comparable cash flow measure on the consolidated statements of cash flows, to EBITDA (in thousands):