Old Second Bancorp
OSBC
185 hedge funds and large institutions have $725M invested in Old Second Bancorp in 2025 Q4 according to their latest regulatory filings, with 22 funds opening new positions, 78 increasing their positions, 59 reducing their positions, and 30 closing their positions.
32% more repeat investments, than reductions
Existing positions increased: 78 | Existing positions reduced: 59
16% more capital invested
Capital invested by funds: $624M → $725M (+$100M)
1.95% more ownership
Funds ownership: 68.61% → 70.56% (+1.9%)
6% less funds holding
Funds holding: 197 → 185 (-12)
20% less funds holding in top 10
Funds holding in top 10: 5 → 4 (-1)
27% less first-time investments, than exits
New positions opened: 22 | Existing positions closed: 30
Top Buyers
| 1 |
Boston Partners
Boston,
Massachusetts
|
+$15.3M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
+$15.2M |
| 3 |
BlackRock
New York
|
+$6.32M |
| 4 |
Millennium Management
New York
|
+$5.86M |
| 5 |
DAM
Davis Asset Management
Sausalito,
California
|
+$4.59M |
Top Sellers
| 1 |
Goldman Sachs
New York
|
-$5.52M |
| 2 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
-$3.76M |
| 3 |
JAM
Jacobs Asset Management
New York
|
-$3.68M |
| 4 |
EF
Empowered Funds
Havertown,
Pennsylvania
|
-$3.43M |
| 5 |
LSV Asset Management
Chicago,
Illinois
|
-$3.34M |
OSBC Hedge Fund Activity: Q4 2025 in Review
185 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Old Second Bancorp (OSBC) for Q4 2025, worth a combined $725M — up 16% from $624M a quarter earlier.
Sellers outnumbered buyers: 30 funds closed out of OSBC and 22 opened new positions — a net loss of 8 holders — while 59 trimmed existing stakes and 78 added.
The largest buyer was Boston Partners, opening a new position worth an estimated $15.3M. The largest seller was Goldman Sachs, cutting an estimated $5.52M.
- 185 institutional investors held Old Second Bancorp (OSBC) as of Q4 2025, down from 197 in Q3 2025.
- Funds reported $725M of Old Second Bancorp stock for Q4 2025, up 16% quarter-over-quarter.
- 22 funds opened new Old Second Bancorp positions in Q4 2025 and 30 closed out, a net change of -8 holders.
- The largest Old Second Bancorp buyer in Q4 2025 was Boston Partners, an estimated $15.3M added.
- The largest Old Second Bancorp seller in Q4 2025 was Goldman Sachs, an estimated $5.52M sold.
Based on aggregated 13F filings for Q4 2025.