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.
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%)
Top Buyers
| 1 |
Northern Trust
Chicago,
Illinois
|
+$10.5M |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$9.96M |
| 3 |
RSA
River Street Advisors
Aurora,
Illinois
|
+$6.91M |
| 4 |
BlackRock
New York
|
+$5.69M |
| 5 |
Geode Capital Management
Boston,
Massachusetts
|
+$3.81M |
Top Sellers
| 1 |
BFC
Banc Funds Company
Chicago,
Illinois
|
-$2.72M |
| 2 |
UBS AM
Chicago,
Illinois
|
-$1.37M |
| 3 |
JP Morgan Chase
New York
|
-$1.26M |
| 4 |
Millennium Management
New York
|
-$1.02M |
| 5 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$1M |
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.