EXHIBIT 99.1

Jones Lang LaSalle Reports Fourth-Quarter and Full-Year 2009 Results

Fourth-quarter net income of $52 million, a 26 percent year-over-year increase

CHICAGO, February 2, 2010 – Jones Lang LaSalle Incorporated (NYSE: JLL), the leading integrated financial and professional services firm specializing in real estate, today reported net income of $52 million on a U.S. GAAP basis, or $1.19 per share, for the fourth quarter ended December 31, 2009, compared with $41 million, or $1.17 per share, for the fourth quarter ended December 31, 2008. Adjusting for Restructuring and certain non-cash co-investment charges in the quarter, fourth-quarter 2009 net income would have been $63 million, or $1.44 per share. Revenue for the fourth quarter of 2009 was $815 million, a 2 percent increase from $797 million in 2008 although down 3 percent in local currency. The firm’s adjusted earnings before interest, taxes, depreciation and amortization (“adjusted EBITDA”) in the fourth quarter of 2009 were $112 million.

The net loss for the year ended December 31, 2009, was $4 million, or $0.11 per share, compared with net income of $84 million, or $2.44 per share, for the year ended December 31, 2008. Adjusting for Restructuring and co-investment charges, full-year 2009 net income would have been $70 million, or $1.75 per share. Full-year revenue was $2.5 billion in 2009, an 8 percent decrease in U.S. dollars, 5 percent in local currency, compared with 2008. Adjusted EBITDA was $239 million for the year.

2009 Highlights:

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Jones Lang LaSalle Reports Fourth-Quarter and Full-Year 2009 Results – Page 2

Results for full-year 2009 included $47 million of Restructuring charges as well as $51 million of non-cash co-investment charges. Restructuring charges are primarily severance related and also include integration costs from the 2008 acquisitions of The Staubach Company and Kemper’s. Restructuring charges are excluded from segment operating results although they are included for consolidated reporting. The non-cash charges relate primarily to impairments of the firm’s investments in real estate ventures and are included in Equity losses at the consolidated and segment reporting levels. Results for the fourth quarter of 2009 included $11 million of Restructuring charges, taken principally in EMEA for additional staff reductions, and $4 million of non-cash co-investment charges.

“We are very pleased with our strong finish to a difficult year,” said Colin Dyer, Chief Executive Officer of Jones Lang LaSalle. “Although markets face a slow and uneven recovery, the actions we’ve taken to protect our businesses and win market share make us confident about our prospects for 2010.”

Business Line Revenue Comparison for the periods ending December 31, 2009 and 2008:

(in millions, “LC” = local currency)

The firm benefited from aggressive cost actions taken across all its businesses for staff reductions and discretionary expenses. Excluding Restructuring charges, operating expenses for the fourth quarter were $722 million, compared with $705 million for the fourth quarter of 2008, up 2 percent but down 2 percent in local currency.

For the full year, operating expenses, excluding Restructuring charges, were $2.3 billion in 2009, compared with $2.5 billion in 2008, down 8 percent for the year, 5 percent in local currency.

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Income tax expense exceeded pre-tax net income for full-year 2009, resulting in a net loss. The effective tax rate of 23 percent for the fourth quarter of 2009 is more representative of an annual effective tax rate the firm would expect over the long term.

Balance Sheet

At the end of 2009, the outstanding balance on the firm’s long-term credit facilities was $175 million. The firm reduced its net bank debt position by $334 million during the year driven by proceeds from its common stock offering in June 2009, strong cash generation and reduced acquisition and capital spending. During the fourth quarter, the firm reduced its net bank debt by $164 million compared to September 30, 2009. The firm was well within the covenant requirements under its bank agreements.

Business Segment Performance Highlights

Investor and Occupier Services

Fourth-quarter Leasing revenue increased 20 percent, to $176 million. Leasing revenue increased 34 percent in the year, to $500 million, up from $373 million in 2008. Property and Facility Management revenue increased 25 percent for the quarter, to $80 million, and 15 percent for the year, to $227 million. Though Project & Development Services revenue was down 24 percent in the fourth quarter, to $44 million, early actions were taken to right-size the business and ensure it maintained profit performance. Full-year Project & Development Services revenue was $159 million, down 21 percent from 2008.

Operating expenses were $302 million in the fourth quarter and $945 million for the year, increases of 9 percent in each period compared with 2008. The fourth-quarter increases were primarily the result of increased business activity over the prior-year period while the full-year increases were primarily the result of additional cost structure from the Staubach acquisition.

The region’s fourth-quarter EBITDA was $52 million compared with $56 million in the fourth quarter of 2008. Full-year EBITDA was $134 million compared with $115 million in 2008.

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Jones Lang LaSalle Reports Fourth-Quarter and Full-Year 2009 Results – Page 4

Capital Markets revenue was $39 million in the fourth quarter and $107 million for the full year of 2009, down 38 percent and 41 percent in local currency, respectively. Leasing revenue was $70 million for the fourth quarter and $173 million for full-year 2009, down 12 percent and 25 percent in local currency, respectively. EMEA results varied across the region, reflecting significant market declines in Russia, MENA and Germany and stable-to-improving markets in France and the United Kingdom. Property & Facility Management revenue was $44 million in the fourth quarter, an increase of 8 percent in local currency, and $136 million for the full year, up 7 percent in local currency, as the firm continued to drive annuity-like revenue growth.

Operating expenses were $210 million in the fourth quarter, a decrease of 5 percent, 12 percent in local currency. Operating expenses were $653 million for the year, a decrease of 23 percent, 15 percent in local currency. Cost reductions were the result of the aggressive, targeted cost management actions taken across the region.

The region’s fourth-quarter EBITDA was $22 million compared with $28 million in the prior year. Full-year EBITDA was $11 million compared with $50 million in 2008.

Fourth-quarter Property & Facility Management revenue in the region increased to $74 million, or 31 percent, 16 percent in local currency. Property & Facility Management revenue was $266 million for the year, a 28 percent increase from 2008, 30 percent in local currency. Capital Markets revenue was $28 million for the fourth quarter, up 6 percent in local currency compared with the same period in 2008, and $58 million for the year, down 4 percent in local currency. Leasing revenue was $42 million in the fourth quarter, up 1 percent in local currency, and $109 million for the year, down 18 percent in local currency.

The firm leveraged its large China presence to capitalize on the government’s economic stimulus package, which drove 20 percent year-over-year revenue growth across its business in the country. The firm’s Australia business reported the highest U.S. dollar revenue improvement in the region resulting from its strong Property & Facility Management business, favorable foreign currency exchange rates and generally better economic conditions relative to the rest of the region.

Fourth-quarter operating expenses were $153 million, compared with $137 million in 2008, a decrease of 1 percent in local currency. Operating expenses for the region were $507 million for the year, a decrease of 5 percent, 3 percent in local currency.

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The region’s fourth-quarter EBITDA was $29 million compared with $11 million in the prior year. Full-year EBITDA was $44 million compared with $18 million in 2008.

LaSalle Investment Management

The business recognized $1 million of Incentive fees in the fourth quarter of 2009, $13 million for the full year. Asset purchases, a key driver of Transaction fees, continued to be limited by the group’s cautious view of the market.

Despite the difficult global real estate environment, LaSalle Investment Management raised over $4.0 billion of net equity in 2009 for separate accounts, funds and public securities. Assets under management were $39.9 billion.

Summary

In the midst of a very challenging environment, the firm continued to perform for clients while protecting its businesses, market positions and top talent. Aggressive but targeted cost actions taken throughout the year contributed to strong fourth-quarter performance. The common stock offering and the firm’s ability to generate cash resulted in a strong balance sheet at year end. With the pace of recovery differing across global markets, the firm will capture emerging opportunities by leveraging its leading market positions and maintaining its focus on containing costs.

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Jones Lang LaSalle Reports Fourth Quarter and Full Year 2009 Results – Page 6

Statements in this press release regarding, among other things, future financial results and performance, achievement, and plans and objectives 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, 2008, and in the Quarterly Reports on Form 10-Q for the quarters ended March 31, 2009, June 30, 2009, and September 30, 2009, and in other reports filed with the Securities and Exchange Commission. 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.

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 2009 global revenue of $2.5 billion, Jones Lang LaSalle serves clients in 60 countries from 750 locations worldwide, including 180 corporate offices. The firm is an industry leader in property and corporate facility management services, with a portfolio of approximately 1.4 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 nearly $40 billion of assets under management. For further information, please visit our Web site, 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

Jones Lang LaSalle Reports Fourth-Quarter and Full-Year 2009 Results – Page 7

Conference Call

The firm will conduct a conference call for shareholders, analysts and investment professionals on Wednesday, February 3 at 9:00 a.m. EST.

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=65416 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 fourth quarter 2009 earnings call has been posted to the Investor Relations section of the company’s Web site: www.joneslanglasalle.com.

Conference Call Replay

Available: 12:00 p.m. EST Wednesday, February 3 through 11:59 p.m. EST Wednesday, February 10 at the following numbers:

Web Audio Replay

Audio replay will be available for download or stream within 24 hours of the conference call. This information and link is also available on the company’s Web site: 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 and Twelve Months Ended December 31, 2009 and 2008

(in thousands, except share data)

(Unaudited)

JONES LANG LASALLE INCORPORATED

Segment Operating Results

For the Three and Twelve Months Ended December 31, 2009 and 2008

(in thousands)

(Unaudited)

JONES LANG LASALLE INCORPORATED

Consolidated Balance Sheets

December 31, 2009 and 2008

(in thousands)

(Unaudited)

Please reference attached financial statement notes.

JONES LANG LASALLE INCORPORATED

Summarized Consolidated Statements of Cash Flows

For the Twelve Months Ended December 31, 2009 and 2008

(in thousands)

(Unaudited)

Please reference attached financial statement notes.

JONES LANG LASALLE INCORPORATED

Financial Statement Notes

Below are reconciliations of GAAP net income (loss) to adjusted net income and calculations of earnings (loss) per share (“EPS”), for each net income (loss) total (in millions after tax, except per share):

An effective tax rate of 24.9 percent is assumed in calculating Restructuring, net of tax, and Non-cash co-investment charges, net of tax, as 24.9 percent was the effective tax rate for the year ended 2008 and is a reasonable estimate of an annual effective tax rate the firm would expect over the long term.

Basic shares outstanding are used in the calculation of full-year 2009 GAAP EPS as the use of dilutive shares outstanding would cause that EPS calculation to be anti-dilutive.

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

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