5 institutions reported holding $8.0M of OLD SECOND BANCORP INC DEL COM (OSBC) in SEC 13F filings for 2026-06-30. Largest institutional holders: CONGRESS ASSET MANAGEMENT CO ($7.9M), Versant Capital Management, Inc ($64,153), GAMMA Investing LLC ($15,158), Assenagon Asset Management S.A. ($0), EASTERN BANK ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | CONGRESS ASSET MANAGEMENT CO | $7.9M | 338,650 | New |
| 2 | Versant Capital Management, Inc | $64,153 | 2,751 | Hold |
| 3 | GAMMA Investing LLC | $15,158 | 650 | Added |
| 4 | Assenagon Asset Management S.A. | $0 | 0 | Exited |
| 5 | EASTERN BANK | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30