SCHEDULE 13G/A 0001420506-20-001005 0001599170 XXXXXXXX LIVE 5 Common Stock 09/30/2024 0000357173 Old Second Bancorp, Inc. (OSBC) 680277100 37 South River Street Aurora IL 60507 Rule 13d-1(c) FJ Capital Management LLC a DE 0 1870988 0 1750774 1870988 N 4.17 IA Relating to items 6 and 9 of this page: Consists of 1,576,562 shares of common stock of the Issuer held by Financial Opportunity Fund LLC and 54,518 shares of common stock of the Issuer held by Financial Opportunity Long/Short Fund LLC, of which FJ Capital Management LLC is the managing member, 47,017 shares of common stock of the Issuer held by Bridge Equities XI, LLC and 73,197 shares of common stock of the Issuer held by Bridge Equities XIV, LLC, of which FJ Capital Management LLC is the sub-investment advisor, and 119,694 shares of common stock of the Issuer held by managed accounts that FJ Capital Management LLC manages; as such, the Reporting Person may be deemed to be a beneficial owner of reported shares but as to which the Reporting Person disclaims beneficial ownership. Relating to item 8 of this page: Consists of 1,576,562 shares of common stock of the Issuer held by Financial Opportunity Fund LLC and 54,518 shares of common stock of the Issuer held by Financial Opportunity Long/Short Fund LLC, of which FJ Capital Management LLC is the managing member, and 119,694 shares of common stock of the Issuer held by managed accounts that FJ Capital Management LLC manages; as such, the Reporting Person may be deemed to be a beneficial owner of reported shares but as to which the Reporting Person disclaims beneficial ownership. Financial Opportunity Fund LLC a DE 0 1576562 0 1576562 1576562 N 3.52 OO Relating to items 6, 8 and 9 of this page: Consists of 1,576,562 shares of common stock of the Issuer held by Financial Opportunity Fund LLC. Financial Opportunity Long/Short Fund LLC a DE 0 54518 0 54518 54518 N 0.12 OO Relating to items 6, 8 and 9 of this page: Consists of 54,518 shares of common stock of the Issuer held by Financial Opportunity Long/Short Fund LLC. Martin Friedman a X1 0 1870988 0 1750774 1870988 N 4.17 IN Relating to items 6 and 9 of this page: Consists of 1,576,562 shares of common stock of the Issuer held by Financial Opportunity Fund LLC and 54,518 shares of common stock of the Issuer held by Financial Opportunity Long/Short Fund LLC, of which FJ Capital Management LLC is the managing member, 47,017 shares of common stock of the Issuer held by Bridge Equities XI, LLC and 73,197 shares of common stock of the Issuer held by Bridge Equities XIV, LLC, of which FJ Capital Management LLC is the sub-investment advisor, and 119,694 shares of common stock of the Issuer held by managed accounts that FJ Capital Management LLC manages. Martin Friedman is the Managing Member of FJ Capital Management LLC; as such, Mr. Friedman may be deemed to be a beneficial owner of reported shares but as to which Mr. Friedman disclaims beneficial ownership. Relating to item 8 of this page: Consists of 1,576,562 shares of common stock of the Issuer held by Financial Opportunity Fund LLC and 54,518 shares of common stock of the Issuer held by Financial Opportunity Long/Short Fund LLC, of which FJ Capital Management LLC is the managing member, and 119,694 shares of common stock of the Issuer held by managed accounts that FJ Capital Management LLC manages; as such, Mr. Friedman may be deemed to be a beneficial owner of reported shares but as to which Mr. Friedman disclaims beneficial ownership. Bridge Equities XI, LLC a DE 0 47017 0 47017 47017 N 0.10 OO Relating to items 6, 8 and 9 of this page: Consists of 47,017 shares of common stock of the Issuer held by Bridge Equities XI, LLC. Bridge Equities XIV, LLC a DE 0 73197 0 73197 73197 N 0.16 OO Relating to items 6, 8 and 9 of this page: Consists of 73,197 shares of common stock of the Issuer held by Bridge Equities XIV, LLC SunBridge Manager, LLC a DE 0 120214 0 120214 120214 N 0.27 OO Relating to items 6, 8 and 9 of this page: Consists of 47,017 shares of common stock of the Issuer held by Bridge Equities XI, LLC and 73,197 shares of common stock of the Issuer held by Bridge Equities XIV LLC, of which SunBridge Manager, LLC is the Managing Member; as such, the Reporting Person may be deemed to be a beneficial owner of reported shares. SunBridge Holdings, LLC a DE 0 120214 0 120214 120214 N 0.27 OO Relating to items 6, 8 and 9 of this page: Consists of 47,017 shares of common stock of the Issuer held by Bridge Equities XI, LLC and 73,197 shares of common stock of the Issuer held by Bridge Equities XIV LLC, of which SunBridge Manager, LLC is the Managing Member. SunBridge Holdings, LLC is the Managing Member of SunBridge Manager, LLC; as such, the Reporting Person may be deemed to be a beneficial owner of reported shares but as to which the Reporting Person disclaims beneficial ownership. White Oak Legacy, Inc a MD 0 120214 0 120214 120214 N 0.27 OO Relating to items 6, 8 and 9 of this page: Consists of 47,017 shares of common stock of the Issuer held by Bridge Equities XI, LLC and 73,197 shares of common stock of the Issuer held by Bridge Equities XIV LLC, of which SunBridge Manager, LLC is the Managing Member. SunBridge Holdings, LLC is the Managing Member of SunBridge Manager, LLC. White Oak Legacy, Inc. is the Manager of SunBridge Holdings, LLC; as such, the Reporting Person may be deemed to be a beneficial owner of reported shares but as to which the Reporting Person disclaims beneficial ownership. Old Second Bancorp, Inc. (OSBC) 37 South River Street, Aurora, IL 60507 FJ Capital Management LLC Financial Opportunity Fund LLC Financial Opportunity Long/Short Fund LLC Bridge Equities XI, LLC Bridge Equities XIV, LLC Martin Friedman SunBridge Manager, LLC SunBridge Holdings, LLC White Oak Legacy, Inc FJ Capital Management, LLC 7901 Jones Branch Drive, Suite 210 McLean, VA 22102 Financial Opportunity Fund LLC 7901 Jones Branch Drive, Suite 210 McLean, VA 22102 Financial Opportunity Long/Short Fund LLC 7901 Jones Branch Drive, Suite 210 McLean, VA 22102 Martin Friedman 7901 Jones Branch Drive, Suite 210 McLean, VA 22102 Bridge Equities XI, LLC 8171 Maple Lawn Blvd, Suite 375 Fulton, MD 20759 Bridge Equities XIV, LLC 8171 Maple Lawn Blvd, Suite 375 Fulton, MD 20759 SunBridge Manager, LLC 8171 Maple Lawn Blvd, Suite 375 Fulton, MD 20759 SunBridge Holdings, LLC 8171 Maple Lawn Blvd, Suite 375 Fulton, MD 20759 White Oak Legacy, Inc 8171 Maple Lawn Blvd, Suite 375 Fulton, MD 20759 Financial Opportunity Fund LLC, Financial Opportunity Long/Short Fund LLC, Bridge Equities XI, LLC, Bridge Equities XIV, LLC, and FJ Capital Management LLC, SunBridge Manager, LLC, SunBridge Holdings, LLC - Delaware limited liability companies Martin Friedman - United States citizen White Oak Legacy, Inc - Maryland corporation Y FJ Capital Management LLC - 1,870,988 shares Financial Opportunity Fund LLC - 1,576,562 shares Financial Opportunity Long/Short Fund LLC - 54,518 shares Martin Friedman - 1,870,988 shares Bridge Equities XI, LLC - 47,017 shares Bridge Equities XIV, LLC - 73,197 shares SunBridge Manager, LLC - 120,214 shares SunBridge Holdings, LLC - 120,214 shares White Oak Legacy, Inc - 120,214 shares FJ Capital Management LLC - 4.17% Financial Opportunity Fund LLC - 3.52% Financial Opportunity Long/Short Fund LLC - 0.12% Martin Friedman - 4.17% Bridge Equities XI, LLC - 0.10% Bridge Equities XIV, LLC - 0.16% SunBridge Manager, LLC - 0.27% SunBridge Holdings, LLC - 0.27% White Oak Legacy, Inc - 0.27% 0 FJ Capital Management LLC - 1,870,988 shares Financial Opportunity Fund LLC - 1,576,562 shares Financial Opportunity Long/Short Fund LLC - 54,518 shares Martin Friedman - 1,870,988 shares Bridge Equities XI, LLC - 47,017 shares Bridge Equities XIV, LLC - 73,197 shares SunBridge Manager, LLC - 120,214 shares SunBridge Holdings, LLC - 120,214 shares White Oak Legacy, Inc - 120,214 shares 0 FJ Capital Management LLC - 1,750,774 shares Financial Opportunity Fund LLC - 1,576,562 shares Financial Opportunity Long/Short Fund LLC - 54,518 shares Martin Friedman - 1,750,774 shares Bridge Equities XI, LLC - 47,017 shares Bridge Equities XIV, LLC - 73,197 shares SunBridge Manager, LLC - 120,214 shares SunBridge Holdings, LLC - 120,214 shares White Oak Legacy, Inc - 120,214 shares N Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. FJ Capital Management LLC Martin Friedman 10/23/2024 Financial Opportunity Fund LLC FJ Capital Management LLC 10/23/2024 Martin Friedman 10/23/2024 Financial Opportunity Long/Short Fund LLC FJ Capital Management LLC 10/23/2024 Martin Friedman 10/23/2024 Martin Friedman Martin Friedman 10/23/2024 Bridge Equities XI, LLC SunBridge Manager, LLC 11/07/2024 David J. Korotkin 11/07/2024 Bridge Equities XIV, LLC SunBridge Manager, LLC 11/07/2024 David J. Korotkin 11/07/2024 SunBridge Manager, LLC SunBridge Holdings, LLC 11/07/2024 David J. Korotkin 11/07/2024 SunBridge Holdings, LLC White Oak Legacy, Inc. 11/07/2024 David J. Korotkin 11/07/2024 White Oak Legacy, Inc David J. Korotkin 11/07/2024