Schedule 13G ownership disclosure

Old Second Bancorp Inc

Common Stock · CUSIP: 680277100

Event date: 2026-09-30

Filing-level shares
2,562,549
Percent of class
5.03%
  • Vanguard Capital Management

    Shares: 2,562,549 · Class: 5.03%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.

Source: SEC EDGAR filing

Filing metadata

Accession number
0002100119-26-001679
Form type
SCHEDULE 13G
Filer
VANGUARD CAPITAL MANAGEMENT LLC
CIK
CIK 2100119
Filed
Oct 30, 2026
Reporting period
Sep 30, 2026
Description
Schedule 13G beneficial ownership

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