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Kilroy Realty Set to Join the S&P MidCap 400; Atlas Air Worldwide to Join S&P SmallCap 600

Kilroy Realty Set to Join the S&P MidCap 400; Atlas Air Worldwide to Join S&P
                                 SmallCap 600

PR Newswire

NEW YORK, Feb. 21, 2013

NEW YORK, Feb. 21, 2013 /PRNewswire/ --S&P SmallCap 600 constituent Kilroy
Realty Corp. (NYSE: KRC) will replace Jefferies Group, Inc. (NYSE: JEF) in the
S&P MidCap 400, and Atlas Air Worldwide Holdings Inc. (NASD: AAWW) will
replace Kilroy Realty in the S&P SmallCap 600 after the close of trading on
Thursday, February 28. S&P 500 constituent Leucadia National Corp. (NYSE: LUK)
is acquiring Jefferies Group in a deal expected to be completed on or around
that date, pending final approvals.

Kilroy Realty is a real estate investment trust (REIT) that operates a
portfolio of commercial properties. Headquartered in Los Angeles, CA, the
company will be added to the S&P MidCap 400 GICS (Global Industry
Classification Standard) Office REITs Sub-Industry index.

Atlas Air Worldwide Holdings provides outsourced aircraft and aviation
operating services. Headquartered in Purchase, NY, the company will be added
to the S&P SmallCap 600 GICS Air Freight & Logistics Sub-Industry index.

Following is a summary of the changes:

S&P MIDCAP 400 INDEX – February 28, 2013
        COMPANY         GICS ECONOMIC SECTOR GICS SUB-INDUSTRY
ADDED   Kilroy Realty   Financials           Office REITs
DELETED Jefferies Group Financials           Investment Banking & Brokerage



S&P SMALLCAP 600 INDEX – February 28, 2013
        COMPANY                   GICS ECONOMIC SECTOR GICS SUB-INDUSTRY
ADDED   Atlas Air Worldwide       Industrials          Air Freight & Logistics
        Holdings
DELETED Kilroy Realty             Financials           Office REITs



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