Exhibit 99.1

      JONES LANG LASALLE AND SPAULDING & SLYE COMPLETE TRANSACTION TO MERGE
                                   OPERATIONS

    CHICAGO, Jan. 3 /PRNewswire-FirstCall/ -- Jones Lang LaSalle Incorporated
(NYSE: JLL), the world's leading real estate services and money management firm,
announced today that the transaction to merge operations with Spaulding & Slye,
a privately held real estate services and investment company with offices in
Boston and Washington, DC, has been completed.

    Terms for the transaction, which was financed with Jones Lang LaSalle's
existing revolving credit facility, were $150 million cash paid at closing with
provisions for additional consideration and an earn-out that are subject to
certain contract provisions and performance.

    While the combined firm will continue to be known as Jones Lang LaSalle, the
Spaulding & Slye name will be retained in specific instances. In the New England
area, where Jones Lang LaSalle is significantly expanding its presence as a
result of the merger, Spaulding & Slye will initially retain its identity and be
known as Spaulding & Slye, a member of the Jones Lang LaSalle group. Spaulding &
Slye's integrated principal-investing practice will operate as Spaulding & Slye
Investments, and the construction business will operate as Spaulding & Slye
Construction. Both will be members of the Jones Lang LaSalle group, which also
includes global businesses Jones Lang LaSalle Hotels and LaSalle Investment
Management.

    Substantially all of Spaulding & Slye's 500 employees are integrating into
the Jones Lang LaSalle organization with the executive management team taking on
significant leadership roles. David McGarry, former Spaulding & Slye President,
will be responsible for senior regional oversight in the Washington, DC and New
England regions, as well as for Spaulding & Slye Construction. Jim Karman,
former Spaulding & Slye Chairman, will have senior- level responsibility for
client relationship management, strategy and corporate development. Marshall
Durston, former Spaulding & Slye Chief Investment Officer, and Peter Bailey,
former Spaulding & Slye Chief Financial Officer, will oversee Spaulding & Slye
Investments. Kyle Warwick, former Spaulding & Slye New England Regional
Director, will continue to have direct management responsibility for the New
England region. William Magner, former Spaulding & Slye Director of
Transactional Services, will continue to have senior-level responsibility in
this area.

    "Since announcing the definitive agreement in November, the positive
response from our clients and employees has only reinforced our conviction that
the decision to join forces with Spaulding & Slye makes sense for Jones Lang
LaSalle strategically, competitively and culturally," said Peter Roberts, CEO of
Jones Lang LaSalle Americas. "The desire we share to be the best real estate
firm in the world will drive us to offer our clients unparalleled service and
results. This is a great marriage of two like-minded firms."

    About Jones Lang LaSalle
    Jones Lang LaSalle is the world's leading real estate services and money
management firm, operating across more than 100 markets around the globe. The
company provides comprehensive integrated expertise, including management
services, implementation services and investment management services on a local,
regional and global level to owners, occupiers and investors. Jones Lang LaSalle
is also the industry leader in property and corporate facility management
services, with a portfolio of 915 million square feet under management
worldwide. LaSalle Investment Management, the company's investment management
business, is one of the world's largest and most diverse real estate money
management firms, with approximately $29 billion of assets under management. Its
web site can be found at http://www.joneslanglasalle.com .



    Statements in this press release regarding, among other things, future
financial results and performance, achievements, plans, targets, projections 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 and Jones Lang LaSalle makes no representations or
guarantees thereof. 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, 2004, in Jones Lang
LaSalle's Quarterly Report on Form 10-Q for the quarters ended March 31, June 30
and September 30, 2005 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. In
addition, nothing herein may be construed or is intended as an offering of any
security.

SOURCE  Jones Lang LaSalle Incorporated
    -0-                             01/03/2006
    /CONTACT:  Gayle Kantro of Jones Lang LaSalle, +1-312-228-2795,
gayle.kantro@am.jll.com , or Steve Steinberg of Spaulding & Slye,
+1-617-531-4122, ssteinberg@spauldslye.com /
    /Web site:  http://www.joneslanglasalle.com /
    (JLL)