The Dun & Bradstreet Corporation
DUN & BRADSTREET CORP/NW (Form: 4, Received: 11/18/2009 17:02:54)
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
Washington, D.C. 20549

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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(f) of the Investment Company Act of 1940

1. Name and Address of Reporting Person *

2. Issuer Name and Ticker or Trading Symbol

5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
PAO & Corporate Controller
(Last)          (First)          (Middle)

3. Date of Earliest Transaction (MM/DD/YYYY)


(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   11/16/2009     M    950   A $14.4083   3553   D    
Common Stock   11/16/2009     S    950   D $81.29   (1) 2603   D    
Common Stock                  1099.762   (2) I   Held in 401(k)  
Common Stock                  564.435   (3) I   Held in ESPP  

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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
Non-Qualified Stock Option - right to buy   $14.4083   11/16/2009     M         950    12/21/2002   (4) 12/21/2009   Common Stock   950   $0   0   D    

Explanation of Responses:
( 1)  Represents the weighted average sales price. Actual prices ranged from $81.29 to $81.30. Upon request from the SEC or a stockholder of the issuer, the reporting person will provide information on the number of shares sold at each separate price.
( 2)  Held in the issuer's 401(k) plan as of 11/13/09.
( 3)  Held in the issuer's Employee Stock Purchase Plan (ESPP) as of 11/10/09.
( 4)  One-third of the option vested each year beginning on the date indicated.

Reporting Owners
Reporting Owner Name / Address
Director 10% Owner Officer Other

PAO & Corporate Controller

/s/ Christine Cappuccia for Anthony Pietrontone Jr. 11/18/2009
** Signature of Reporting Person Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
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        Know all by these presents, that the undersigned hereby constitutes and
appoints each of Jeffrey S. Hurwitz (General Counsel and Corporate Secretary),
Richard S. Mattessich (Assistant Corporate Secretary), Kristin R. Kaldor (Senior
Attorney) and Christine Cappuccia (Corporate Secretary Specialist) signing
singly, as his or her true and lawful attorney-in-fact to:

(1)     execute for and on behalf of the undersigned Forms 3, 4 and 5, as a result
of the undersigned's ownership of or transactions in securities of The Dun &
Bradstreet Corporation, in accordance with Section 16(a) of the Securities
Exchange Act of 1934 and the rules thereunder; and

(2)     do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete, execute and file any such Form 3, 4
or 5 with the United States Securities and Exchange Commission and any other

        The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform all and every act and thing whatsoever requisite,
necessary and proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or his or her
substitute or substitutes, shall lawfully do or cause to be done by virtue of
this Power of Attorney and the rights and powers herein granted.  The authority
under this Power of Attorney shall continue until the undersigned is no longer
required to file Forms 3, 4 and 5 with regard to the undersigned's ownership of
or transactions in securities of The Dun & Bradstreet Corporation, unless
earlier revoked in writing.  The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming any of the undersigned's responsibilities to
comply with Section 16 of the Securities Exchange Act of 1934.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 11th day of November, 2009.

/s/ Anthony Pietrontone, Jr.

Anthony Pietrontone, Jr.
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