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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
Morgan Stanley
26
Morgan Stanley
New York
$5.36M -$632K -35,112 -10%
Qube Research & Technologies (QRT)
27
Qube Research & Technologies (QRT)
United Kingdom
$4.59M -$554K -30,786 -10%
Arrowstreet Capital
28
Arrowstreet Capital
Massachusetts
$3.75M +$65.9K +3,659 +2%
FFM
29
Forum Financial Management
Illinois
$3.72M -$261K -14,516 -6%
EF
30
Empowered Funds
Pennsylvania
$3.43M +$368K +20,423 +11%
LSV Asset Management
31
LSV Asset Management
Illinois
$3.34M -$175K -9,700 -5%
Two Sigma Investments
32
Two Sigma Investments
New York
$3.25M +$1.19M +66,340 +55%
Bank of Montreal
33
Bank of Montreal
Ontario, Canada
$3.1M +$3.23M +179,350 New
EC
34
EJF Capital
Virginia
$3M +$550K +30,548 +21%
Thrivent Financial for Lutherans
35
Thrivent Financial for Lutherans
Minnesota
$3M -$293K -16,251 -9%
GLA
36
Great Lakes Advisors
Illinois
$2.89M -$452K -25,077 -13%
SCP
37
Siena Capital Partners
Illinois
$2.82M – – –
Victory Capital Management
38
Victory Capital Management
Texas
$2.81M +$728K +40,402 +33%
EPCA
39
Elizabeth Park Capital Advisors
Ohio
$2.74M +$133K +7,358 +5%
Wellington Management Group
40
Wellington Management Group
Massachusetts
$2.7M – – –
William Blair & Company
41
William Blair & Company
Illinois
$2.67M +$2.46M +136,416 +757%
KOCAA
42
Knights of Columbus Asset Advisors
Connecticut
$2.36M +$80.8K +4,487 +3%
MAM
43
Martingale Asset Management
Massachusetts
$2.34M +$58.5K +3,248 +2%
BFM
44
Boothbay Fund Management
New York
$2.16M +$2.26M +125,249 New
State of New Jersey Common Pension Fund D
45
State of New Jersey Common Pension Fund D
New Jersey
$2.09M +$125K +6,915 +6%
Barclays
46
Barclays
United Kingdom
$2.02M -$304K -16,898 -13%
Russell Investments Group
47
Russell Investments Group
United Kingdom
$1.92M +$81.1K +4,505 +4%
Fisher Asset Management
48
Fisher Asset Management
Washington
$1.77M -$99.4K -5,518 -5%
CRC
49
Curi RMB Capital
Illinois
$1.74M – – –
MCA
50
Mendon Capital Advisors
Florida
$1.73M – – –
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.