Old Second Bancorp Inc
Ownership
Ownership Structure
Who owns Old Second Bancorp Inc (OSBC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 93.8% of the shares are freely tradable; institutional investors hold 75.9%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.45 | 4,298,683 | +4.2 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 4.91 | 2,498,671 | +4.6 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.28 | 2,179,877 | -3.2 | 06/30/2026 |
| State Street Corp | 3.62 | 1,839,202 | +15.0 | 06/30/2026 |
| Davis Asset Management, L.P. | 3.54 | 1,800,000 | +0.0 | 06/30/2026 |
| American Century Companies Inc | 3.51 | 1,783,820 | +12.1 | 06/30/2026 |
| The Goldman Sachs Group Inc | 3.19 | 1,624,852 | -3.9 | 06/30/2026 |
| FJ Capital Management LLC | 2.87 | 1,460,413 | -3.0 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Avantis US Small Cap Value ETF | 3.18 | 1,621,544 | +0.1 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.05 | 1,554,034 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Eccher James | CHAIRMAN AND CEO | 343,384 | 8,618,938 $ | Aug 12, 2026 | both |
| Campbell Darin Patrick | President, Powersports Lending | 250,589 | 6,289,784 $ | Sep 2, 2026 | direct |
| Mclean Hugh H | Director | 135,351 | 3,397,310 $ | Sep 8, 2026 | direct |
| Collins Gary S | VICE CHAIRMAN | 74,397 | 1,867,367 $ | Sep 4, 2026 | both |
| Lyons Billy J Jr. | Director | 20,117 | 504,937 $ | Aug 10, 2026 | direct |
| Gartelmann Richard A JR | EVP | 12,683 | 318,343 $ | Sep 30, 2026 | indirect |
| Adams Bradley S. | CFO & COO | 10,221 | 256,547 $ | Sep 30, 2026 | indirect |
| York Jill E | Director | 4,320 | 108,423 $ | Aug 10, 2026 | direct |
| Pilmer Donald | EVP | 4,048 | 101,605 $ | Sep 30, 2026 | indirect |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 30, 2026 | Gartelmann Richard A JR | EVP | Other | 35 | 0.00 | – |
| Sep 30, 2026 | Pilmer Donald | EVP | Other | 11 | 0.00 | – |
| Sep 30, 2026 | Adams Bradley S. | CFO & COO | Other | 28 | 0.00 | – |
| Sep 30, 2026 | Eccher James | CHAIRMAN AND CEO | Other | 92 | 0.00 | – |
| Sep 30, 2026 | Eccher James | CHAIRMAN AND CEO | Other | 17 | 0.00 | – |
| Sep 30, 2026 | Collins Gary S | VICE CHAIRMAN | Other | 30 | 0.00 | – |
| Sep 23, 2026 | Collins Gary S | VICE CHAIRMAN | Sell | 16,000 | 24.69 | 395,080 |
| Sep 8, 2026 | Mclean Hugh H | Director | Sell | 25,000 | 25.63 | 640,768 |
| Sep 4, 2026 | Collins Gary S | VICE CHAIRMAN | Sell | 5,000 | 25.71 | 128,525 |
| Sep 3, 2026 | Mclean Hugh H | Director | Sell | 25,000 | 25.73 | 643,175 |
| Sep 2, 2026 | Campbell Darin Patrick | President, Powersports Lending | Sell | 24,000 | 25.53 | 612,792 |
| Aug 12, 2026 | Eccher James | CHAIRMAN AND CEO | Sell | 19,313 | 25.61 | 494,701 |
| Aug 11, 2026 | Eccher James | CHAIRMAN AND CEO | Sell | 55,687 | 25.46 | 1,417,763 |
| Aug 10, 2026 | York Jill E | Director | Other | 12 | 25.38 | 305 |
| Aug 10, 2026 | Lyons Billy J Jr. | Director | Other | 20 | 25.38 | 508 |
| May 11, 2026 | York Jill E | Director | Other | 14 | 20.90 | 293 |
| Feb 9, 2026 | York Jill E | Director | Other | 14 | 21.21 | 297 |
| Nov 10, 2025 | York Jill E | Director | Other | 16 | 18.35 | 294 |
| Aug 4, 2025 | York Jill E | Director | Other | 15 | 16.61 | 249 |
| May 5, 2025 | York Jill E | Director | Other | 16 | 16.30 | 261 |
| Feb 10, 2025 | York Jill E | Director | Other | 13 | 19.02 | 247 |
| Nov 4, 2024 | York Jill E | Director | Other | 16 | 16.15 | 258 |
| Aug 5, 2024 | York Jill E | Director | Other | 14 | 14.86 | 208 |
| May 6, 2024 | York Jill E | Director | Other | 14 | 14.43 | 202 |
| Feb 6, 2024 | York Jill E | Director | Other | 15 | 13.46 | 202 |
| Nov 7, 2023 | York Jill E | Director | Other | 15 | 14.27 | 214 |
| Aug 8, 2023 | York Jill E | Director | Other | 13 | 15.99 | 208 |
| May 9, 2023 | York Jill E | Director | Other | 18 | 11.16 | 201 |
| Feb 7, 2023 | York Jill E | Director | Other | 12 | 17.21 | 207 |
| Nov 8, 2022 | York Jill E | Director | Other | 12 | 16.97 | 204 |
| Aug 9, 2022 | York Jill E | Director | Other | 15 | 13.98 | 210 |
| May 10, 2022 | York Jill E | Director | Other | 14 | 14.14 | 198 |
| Feb 8, 2022 | York Jill E | Director | Other | 14 | 14.43 | 202 |
| Nov 9, 2021 | York Jill E | Director | Other | 15 | 13.81 | 207 |
| Aug 11, 2021 | York Jill E | Director | Other | 18 | 11.44 | 206 |
| May 11, 2021 | York Jill E | Director | Other | 14 | 14.08 | 197 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.