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River Street Advisors LLC

Position in OSBC — Old Second Bancorp Inc

CIK 1964897 AURORA, IL

Position in OSBC

as of Jun 30, 2026 · filed Jul 21, 2026
Position Value
$18,166,466
+$3,113,801 QoQ
Shares Held
779,008
+4.3% QoQ
Ownership
1.53%
of shares outstanding
% of Portfolio
8.50%
of 13F equity value
Holder Rank
#16
of 185 holders
Holding Since
Dec 2024
6 quarters on record
Voting authority Sole 0% Shared 0% None 100%

Common Shares in OSBC Over Time

Shares Held

Position Value (USD)

Position in Banks - Regional

Financial Services · as of Jun 30, 2026

River Street Advisors LLC holds $18,166,466 across 1 Banks - Regional name. OSBC ranks #1 (100.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 OSBC
Old Second Bancorp Inc
This page
779,008 $18,166,466

All Filings in OSBC

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6 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $18,166,466 779,008
2026-03-31 $15,052,665 746,660
2025-12-31 $7,138,384 366,071
2025-09-30 $6,638,477 383,949
2025-03-31 $4,869,047 292,611
2024-12-31 $3,363,069 189,149