Old Second Bancorp (OSBC) Superinvestor holders
8 of the superinvestors we track hold Old Second Bancorp (OSBC) in their latest 13F filings, $65M in total.
Summary
The largest holder is Mark Donovan (Boston Partners), with $33M, 0.0% of the portfolio.
In their latest quarter: 1 opened a new position, 3 added, 4 trimmed.
Who holds it
Each investor's latest 13F filing, largest stake first. What a 13F shows.
| Investor | Last change | Shares | Value | % of portfolio | Filed for |
|---|---|---|---|---|---|
| Mark Donovan Boston Partners |
Trimmed | 1,415,165 | $33M | 0.0% | Q2 2026 |
| Cliff Asness AQR Capital Management |
Trimmed | 386,234 | $9M | 0.0% | Q2 2026 |
| Derek Pilecki Gator Capital Management |
Added | 359,730 | $8M | 1.8% | Q2 2026 |
| Arrowstreet Capital | Added | 210,745 | $5M | 0.0% | Q2 2026 |
| Two Sigma Two Sigma Investments |
Added | 200,819 | $5M | 0.0% | Q2 2026 |
| David Shaw D. E. Shaw & Co. |
New position | 114,326 | $3M | 0.0% | Q2 2026 |
| Ken Fisher Fisher Investments |
Trimmed | 83,188 | $2M | 0.0% | Q3 2026 |
| Jim Simons Renaissance Technologies |
Trimmed | 21,221 | $494,874 | 0.0% | Q2 2026 |
Holders by quarter
| Quarter | Superinvestors holding it |
|---|---|
| Q2 2026 | 8 |
| Q1 2026 | 8 |
| Q4 2025 | 9 |
| Q3 2025 | 13 |
| Q2 2025 | 10 |
| Q1 2025 | 13 |
| Q4 2024 | 10 |
| Q3 2024 | 9 |
Questions about Old Second Bancorp
Which superinvestors own Old Second Bancorp?
8 of the superinvestors we track hold Old Second Bancorp (OSBC) in their latest 13F filings, $65M in total. Mark Donovan, Cliff Asness, Derek Pilecki, Arrowstreet Capital, Two Sigma, David Shaw.
Who is the largest superinvestor holder of OSBC?
The largest holder is Mark Donovan (Boston Partners), with $33M, 0.0% of the portfolio.
From Old Second Bancorp's annual reports filed with the SEC (XBRL data), standardised by Investingly. Information only, not investment advice.