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Old Second Bancorp
OSBC

197 hedge funds and large institutions have $624M invested in Old Second Bancorp in 2025 Q3 according to their latest regulatory filings, with 32 funds opening new positions, 84 increasing their positions, 50 reducing their positions, and 16 closing their positions.

New
Increased
Maintained
Reduced
Closed

100% more first-time investments, than exits

New positions opened: 32 | Existing positions closed: 16

68% more repeat investments, than reductions

Existing positions increased: 84 | Existing positions reduced: 50

67% more funds holding in top 10

Funds holding in top 10: 3 → 5 (+2)

8% more capital invested

Capital invested by funds: $579M → $624M (+$45.3M)

8% more funds holding

Funds holding: 183 → 197 (+14)

3.83% less ownership

Funds ownership: 72.44% → 68.61% (-3.8%)

Holders
197
Holders Change
+14
Holders Change %
+7.65%
% of All Funds
2.59%
Holding in Top 10
5
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+66.67%
% of All Funds
0.07%
New
32
Increased
84
Reduced
50
Closed
16
Calls
$488K
Puts
–
Net Calls
+$488K
Net Calls Change
+$488K

Top Buyers

1
Northern Trust
Northern Trust
Illinois
+$10.5M
2
Vanguard Group
Vanguard Group
Pennsylvania
+$9.96M
3
RSA
River Street Advisors
Illinois
+$6.91M
4
BlackRock
BlackRock
New York
+$5.69M
5
Geode Capital Management
Geode Capital Management
Massachusetts
+$3.81M

Top Sellers

1
BFC
Banc Funds Company
Illinois
-$2.72M
2
UBS AM
UBS AM
Illinois
-$1.37M
3
JP Morgan Chase
JP Morgan Chase
New York
-$1.26M
4
Millennium Management
Millennium Management
New York
-$1.02M
5
Susquehanna International Group
Susquehanna International Group
Pennsylvania
-$1M
Name Holding Trade Value Shares
Change 		Change in
Stake
SBF
51
Sara-Bay Financial
Florida
$1.71M +$1.78M +99,063 New
BGIM
52
Brandywine Global Investment Management
Pennsylvania
$1.63M -$63K -3,500 -4%
MCA
53
MSH Capital Advisors
Arizona
$1.47M – – –
Swiss National Bank
54
Swiss National Bank
Switzerland
$1.41M – – –
Ameriprise
55
Ameriprise
Minnesota
$1.37M -$488K -27,095 -26%
Citadel Advisors
56
Citadel Advisors
Florida
$1.34M +$465K +25,833 +50%
Invesco
57
Invesco
Georgia
$1.33M +$120K +6,662 +9%
RhumbLine Advisers
58
RhumbLine Advisers
Massachusetts
$1.3M +$76.6K +4,256 +6%
JC
59
JCSD Capital
California
$1.3M +$1.35M +75,100 New
HEIP
60
Hudson Edge Investment Partners
New Jersey
$1.07M +$17.6K +979 +2%
State Board of Administration of Florida Retirement System
61
State Board of Administration of Florida Retirement System
Florida
$1.02M – – –
PFO
62
PMC FIG Opportunities
Israel
$978K +$1.02M +56,569 New
SEI Investments
63
SEI Investments
Pennsylvania
$953K +$26.5K +1,470 +3%
IC
64
IEQ Capital
California
$921K +$405K +22,495 +73%
BMCM
65
Black Maple Capital Management
Wisconsin
$907K +$90K +5,000 +11%
UBS AM
66
UBS AM
Illinois
$899K -$1.37M -75,919 -59%
Renaissance Technologies
67
Renaissance Technologies
New York
$849K -$605K -33,600 -41%
Wealth Enhancement Advisory Services
68
Wealth Enhancement Advisory Services
Minnesota
$839K -$183K -10,157 -17%
B
69
Bailard
California
$825K +$173K +9,600 +25%
Point72 Asset Management
70
Point72 Asset Management
Connecticut
$824K +$510K +28,335 +147%
Legal & General Group
71
Legal & General Group
United Kingdom
$822K +$8.77K +487 +1%
ECM
72
ExodusPoint Capital Management
New York
$822K -$232K -12,867 -21%
HPCM
73
Hunter Perkins Capital Management
Illinois
$792K – – –
CP
74
CenterBook Partners
Connecticut
$792K +$825K +45,797 New
UBS Group
75
UBS Group
Switzerland
$775K +$136K +7,541 +20%
1 2
3
4 5

OSBC Hedge Fund Activity: Q3 2025 in Review

197 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Old Second Bancorp (OSBC) for Q3 2025, worth a combined $624M — up 7.8% from $579M a quarter earlier.

Buyers outnumbered sellers: 32 funds opened new OSBC positions and 16 closed out — a net gain of 16 holders — while 84 added to existing stakes and 50 trimmed.

The largest buyer was Northern Trust, adding an estimated $10.5M. The largest seller was Banc Funds Company, cutting an estimated $2.72M.

  • 197 institutional investors held Old Second Bancorp (OSBC) as of Q3 2025, up from 183 in Q2 2025.
  • Funds reported $624M of Old Second Bancorp stock for Q3 2025, up 7.8% quarter-over-quarter.
  • 32 funds opened new Old Second Bancorp positions in Q3 2025 and 16 closed out, a net change of +16 holders.
  • The largest Old Second Bancorp buyer in Q3 2025 was Northern Trust, an estimated $10.5M added.
  • The largest Old Second Bancorp seller in Q3 2025 was Banc Funds Company, an estimated $2.72M sold.

Based on aggregated 13F filings for Q3 2025.