OSBC
Old Second Bancorp, Inc. · Financial Services · Banks - Regional
Momentum inputs (comparable managers):
holder breadth -11.1% ·
share flow -3.3% ·
net new positions -12.5%
— formula
Broad distribution — falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 76 | -7 | 26.35M | $612.20M | +2 | −9 |
| Q1 2026 | 86 | +3 | 25.75M | $518.74M | +6 | −3 |
| Q4 2025 | 83 | 0 | 26.46M | $516.04M | +2 | −2 |
| Q3 2025 | 19 | 0 | 14.70M | $254.02M | +1 | −1 |
| Q2 2025 | 16 | -2 | 10.11M | $179.35M | — | −2 |
| Q1 2025 | 15 | +2 | 4.21M | $70.01M | +2 | — |
| Q4 2024 | 13 | 0 | 4.39M | $78.07M | +1 | −1 |
| Q3 2024 | 12 | +1 | 2.37M | $37.00M | +1 | — |
| Q2 2024 | 11 | — | 2.48M | $36.78M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 3.50M | — | $62.12M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | The Vanguard Group ✦ (passive) | 2.72M | — | $48.20M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | The Vanguard Group ✦ (passive) | 2.72M | — | $48.20M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | The Vanguard Group ✦ (passive) | 2.72M | — | $48.20M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | The Vanguard Group ✦ (passive) | 2.72M | — | $48.20M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | The Vanguard Group ✦ (passive) | 2.72M | — | $48.20M | 0.0% | n/c | 1 | SEC ↗ |
| 17 | State Street Global Advisors ✦ (passive) | 1.31M | -0.3% | $23.16M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 18 | Geode Capital Management ✦ (passive) | 1.15M | +2.2% | $20.43M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 19 | Geode Capital Management ✦ (passive) | 1.15M | +2.2% | $20.43M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 20 | AQR Capital Management ✦ | 520.93K | -3.7% | $9.24M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 21 | AQR Capital Management ✦ | 520.93K | -3.7% | $9.24M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 22 | AQR Capital Management ✦ | 520.93K | -3.7% | $9.24M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 23 | AQR Capital Management ✦ | 520.93K | -3.7% | $9.24M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 24 | AQR Capital Management ✦ | 520.93K | -3.7% | $9.24M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 25 | Arrowstreet Capital ✦ | 213.24K | +9.5% | $3.78M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 26 | Wellington Management ✦ | 156.11K | -14.6% | $2.77M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 27 | Two Sigma Investments ✦ | 121.45K | +3.4% | $2.15M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 28 | Fisher Asset Management ✦ | 108.02K | 0.0% | $1.92M | 0.0% | Held | 5 | SEC ↗ |
| 29 | Renaissance Technologies ✦ | 82.72K | -45.5% | $1.47M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 30 | Millennium Management ✦ | 57.43K | -79.7% | $1.02M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 31 | Citadel Advisors ✦ | 51.76K | +126.8% | $918,133 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 32 | Citadel Advisors ✦ | 51.76K | +126.8% | $918,133 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 33 | D. E. Shaw & Co. ✦ | 43.88K | +116.7% | $778,360 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 34 | Fidelity (FMR) ✦ | 31.99K | — | $567,433 | 0.0% | n/c | 1 | SEC ↗ |
| 35 | Fidelity (FMR) ✦ | 31.99K | — | $567,433 | 0.0% | n/c | 1 | SEC ↗ |
| 36 | T. Rowe Price ✦ | 27.34K | +11.8% | $486,000 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 37 | T. Rowe Price ✦ | 27.34K | +11.8% | $486,000 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 38 | Point72 Asset Management ✦ | 19.34K | +52.0% | $343,037 | 0.0% | ▲ Add | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Adage Capital Partners | $1.66M | was 0.0% |
| Marshall Wace | $193,024 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 187 holders, 37.08M shares, $741.50M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer, Director · 19.31K sh · $494,701
Officer, Director · 55.69K sh · $1.42M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology