Sec Form 4 Filing - Sloan Rodney @ OLD SECOND BANCORP INC - 2010-09-30

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 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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1. Name and Address of Reporting Person Sloan Rodney 2. Issuer Name and Ticker or Trading Symbol OLD SECOND BANCORP INC [ OSBC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Risk Officer (Last) (First) (Middle) 37 S. RIVER ST. 3. Date of Earliest Transaction (MM/DD/YY) 09/30/2010 (Street) AURORA, IL60506 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 Old Second Bancorp Inc. Common Stock 09/21/2010 ( 1 ) A 10,000 ( 2 ) A 31,602 ( 3 ) D Old Second Bancorp Inc. Common Stock 06/30/2010 ( 1 ) A 31 A 5,481 ( 4 ) I 401(K) Old Second Bancorp Inc. Common Stock 06/30/2010 ( 1 ) A 7 A 1,331 ( 5 ) I Profit Sharing

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Employee Stock Option (Right to Buy $ 32.59 12/20/2005 12/21/2014 Common Stock 7,000 7,000 D Employee Stock Option (Right to Buy $ 25.08 12/20/2005 12/16/2013 Common Stock 7,000 ( 6 ) 7,000 ( 5 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Sloan Rodney 37 S. RIVER ST. AURORA, IL60506 Chief Risk Officer Signatures /s/ Rodney Sloan 09/30/2010 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Does not apply. ( 2 )Represents restricted stock units granted under the Old Second Bancorp Inc. Equity Incentive Plan. ( 3 )Included in this total are 3,405 shares held in Mr. Sloan's name alone; 1,946 shares of restricted stock; 26,141 shares of restricted stock units in Mr. Sloan's name and 110 shares in a brokerage account. ( 4 )Of this total, 31 shares were allocated during the second quarter pursuant to the Old Second Bancorp Inc. Salary Savings Plan. Information provided herein is based on information provided by the Plan Trustee as of 9-30-10. ( 5 )Of this total, 7 shares were allocated during the second quarter pursuant to the Old Second Employees Profit Sharing Plan & Trust. Information provided herein is based on information provided by the Plan Trustee as of 9-30-10. ( 6 )Shares restated for a 2 for 1 stock split effected in the form of a stock dividend payable 7-28-04.

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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