FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * THERIAULT TIMOTHY J   2. Issuer Name and Ticker or Trading Symbol NORTHERN TRUST CORP [NTRS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) EVP & President C&IS (Last) (First) (Middle) 50 S. LA SALLE ST. 3. Date of Earliest Transaction (Month/Day/Year) 10/24/2008 (Street) CHICAGO, IL 60603 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock (1) 10/24/2008   F   589 D $ 48.82 43,207 D   Common Stock (1) 10/24/2008   F   1,973 D $ 48.82 37,514 (2) (3) D   Common Stock               56,054 (2) (3) I By Trust Common Stock               72 (4) I 401(k)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
THERIAULT TIMOTHY J 50 S. LA SALLE ST. CHICAGO, IL 60603			EVP & President C&IS

Signatures

Paul A. Bernacki Attorney-in-Fact for Timothy J. Theriault		10/28/2008
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Represents stock units payable automatically on a 1-for-1 basis in shares of the Corporation's common stock.
(2)	On October 24, 2008, 7,000 already reported and vested stock units, granted on February 18, 2003, were distributed to the reporting person, 693 stock units were distributed to the reporting person as shares of common stock (NTRS); and 589 stock units were withheld in payment of Federal, State and Medicare taxes, and 5,718 stock units were deferred.
(3)	On October 24, 2008, 5,000 already reported and vested stock units, granted February 15, 2005 were distributed to the reporting person. 3,027 stock units were distributed to the reporting person as shares of common stock (NTRS); and 1,973 stock units were withheld in payment of Federal, State, and Medicare taxes.
(4)	as of 09-30-08

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