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Equibles

BLAIR WILLIAM & CO/IL

Position in OSBC — Old Second Bancorp Inc

CIK 902367 CHICAGO, IL
Back to OSBC Full portfolio

Position in OSBC

as of Jun 30, 2026 · filed Aug 11, 2026
Position Value
$3,806,476
+$522,755 QoQ
Shares Held
163,228
+0.2% QoQ
Ownership
0.321%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#41
of 185 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 97% Shared 0% None 3%

Common Shares in OSBC Over Time

Shares Held

Position Value (USD)

Position in Banks - Regional

Financial Services · as of Jun 30, 2026

BLAIR WILLIAM & CO/IL holds $136,148,420 across 60 Banks - Regional names. OSBC ranks #9 (2.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 BOKF
Bok Financial Corp
 194,747 $27,046,463
2 PNC
Pnc Financial Services Group, Inc.
 55,938 $13,773,054
3 FITB
Fifth Third Bancorp
 198,705 $11,201,000
4 HBAN
Huntington Bancshares Inc /Md/
 578,787 $10,261,893
5 RF
Regions Financial Corp
 295,952 $8,937,750
6 USB
US Bancorp \De\
 145,164 $8,767,905
7 UCB
United Community Banks Inc
 217,555 $7,634,004
8 IBN
Icici Bank Ltd
 150,158 $4,359,086

All Filings in OSBC

Export CSV
26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $3,806,476 163,228
2026-03-31 $3,283,721 162,883
2025-12-31 $3,007,270 154,219
2025-09-30 $2,670,198 154,436
2025-06-30 $319,674 18,020
2025-03-31 $299,503 17,999
2024-12-31 $319,719 17,982
2024-09-30 $290,379 18,626
2024-06-30 $275,614 18,610
2024-03-31 $153,416 11,085
2023-12-31 $171,106 11,082
2023-09-30 $150,798 11,080
2023-06-30 $144,678 11,078
2023-03-31 $155,714 11,075
2022-12-31 $177,610 11,073
2022-09-30 $144,476 11,071
2022-06-30 $148,089 11,068
2022-03-31 $160,567 11,066
2021-12-31 $139,295 11,064
2021-09-30 $144,456 11,061
2021-06-30 $137,119 11,058
2021-03-31 $146,049 11,056
2020-12-31 $369,205 36,555
2020-09-30 $485,617 64,749
2020-06-30 $420,197 54,010
2020-03-31 $797,510 115,414