As of September 09, 2026, Byline Bancorp's top three insider holders are Investors I, L.P. Mbg (TenPercentOwner, 11.84Mn shares), Valle Perochena Antonio Del (Director, 11.84Mn shares), Investors I, L.P. Mbg (TenPercentOwner, 11.56Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Investors I, L.P. Mbg | TenPercentOwner | 23,090,746 | 0 | 23,090,746 | 49.3% | 11 Aug, 2026 |
| 2 | Valle Perochena Antonio Del | Director, TenPercentOwner | 0 | 23,045,746 | 23,045,746 | 49.2% | 11 Aug, 2026 |
| 3 | Thomas Abraham | President, Sbc | 157,715 | 0 | 157,715 | 0.3% | 20 Apr, 2026 |
| 4 | Steven P. Kent | Director | 0 | 89,750 | 89,750 | 0.2% | 13 Jun, 2025 |
| 5 | Thomas J Iii Bell | Evp Chief Financial Officer | 77,403 | 0 | 77,403 | 0.2% | 24 Feb, 2026 |
| 6 | Megan Biggam | Evp Head Of Community Banking | 44,172 | 0 | 44,172 | 0.1% | 24 Feb, 2026 |
| 7 | Brogan Ptacin | Head Of Commercial Banking | 41,427 | 0 | 41,427 | 0.1% | 04 Aug, 2026 |
| 8 | John Barkidjija | Head Of Cre Specialty Fin | 39,983 | 0 | 39,983 | 0.1% | 27 Feb, 2026 |
| 9 | Mark Fucinato | Chief Credit Officer | 35,183 | 0 | 35,183 | 0.1% | 24 Feb, 2026 |
| 10 | Mary Jo S. Herseth | Director | 11,602 | 19,100 | 30,702 | 0.1% | 20 Aug, 2026 |
| 11 | Nicolas Mando | Chief Technology Operations | 20,503 | 0 | 20,503 | 0.0% | 24 Feb, 2026 |
| 12 | Dana Rose | Chief Human Resources Officer | 20,373 | 0 | 20,373 | 0.0% | 12 Aug, 2026 |
| 13 | Phillip R. Cabrera | Director | 15,871 | 4,129 | 20,000 | 0.0% | 29 Jan, 2026 |
| 14 | Maria Sherylle A Olano | Svp, Chief Accounting Officer | 18,768 | 0 | 18,768 | 0.0% | 24 Feb, 2026 |
| 15 | William G Kistner | Director | 2,371 | 14,289 | 16,660 | 0.0% | 20 Aug, 2026 |
| 16 | Michelle Lynn Johnson | Chief Risk Officer | 14,280 | 0 | 14,280 | 0.0% | 24 Feb, 2026 |
| 17 | Carlos Ruiz Sacristan | Director | 13,533 | 0 | 13,533 | 0.0% | 10 Jun, 2026 |
| 18 | Hart Angela E Major | Evp, Head Of Wealth Management | 10,958 | 0 | 10,958 | 0.0% | 24 Feb, 2023 |
| 19 | Pamela C Stewart | Director | 8,822 | 0 | 8,822 | 0.0% | 08 Aug, 2024 |
| 20 | Velez Margarita Hugues | Director | 8,722 | 0 | 8,722 | 0.0% | 10 Jun, 2026 |
| 21 | Ana Casanueva | Svp, Director Of Legal | 8,076 | 0 | 8,076 | 0.0% | 29 Feb, 2024 |
| 22 | Brian F Doran | General Counsel | 2,533 | 0 | 2,533 | 0.0% | 24 Feb, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 19 Aug, 2026 | Mary Jo S. Herseth | Director | Acquired P | 300 | $38.40 | $11.52K | 19,100 | Indirect |
| 19 Aug, 2026 | William G Kistner | Director | Acquired P | 100 | $38.30 | $3.83K | 14,289 | Indirect |
| 12 Aug, 2026 | Dana Rose | Chief Human Resources Officer | Disposed S | 2,421 | $39.00 | $94.42K | 11,605 | Direct |
| 07 Aug, 2026 | Valle Perochena Antonio Del | Director, TenPercentOwner | Disposed S | 300,000 | $39.10 | $11.73Mn | 11,535,145 | Indirect |
| 07 Aug, 2026 | Investors I, L.P. Mbg | TenPercentOwner | Disposed S | 300,000 | $39.10 | $11.73Mn | 11,535,145 | Direct |
| 03 Aug, 2026 | Brogan Ptacin | Head Of Commercial Banking | Acquired A | 9,450 | $12.70 | $120.02K | 35,309 | Direct |
| 03 Aug, 2026 | Brogan Ptacin | Head Of Commercial Banking | Disposed D | 9,450 | $39.61 | $374.32K | 25,859 | Direct |
| 03 Aug, 2026 | Brogan Ptacin | Head Of Commercial Banking | Disposed M | 9,450 | $0.00 | $0 | 0 | Direct |
| 08 Jun, 2026 | Carlos Ruiz Sacristan | Director | Acquired A | 1,533 | $0.00 | $0 | 13,533 | Direct |
| 08 Jun, 2026 | Velez Margarita Hugues | Director | Acquired A | 1,533 | $0.00 | $0 | 8,722 | Direct |
| 02 Jun, 2026 | Velez Margarita Hugues | Director | Disposed F | 530 | $33.41 | $17.71K | 7,189 | Direct |
| 04 May, 2026 | William G Kistner | Director | Acquired P | 100 | $31.97 | $3.20K | 14,189 | Indirect |
| 16 Apr, 2026 | Thomas Abraham | President, Sbc | Acquired A | 2,406 | $0.00 | $0 | 45,539 | Direct |
| 16 Mar, 2026 | Mary Jo S. Herseth | Director | Acquired P | 300 | $30.83 | $9.25K | 18,800 | Indirect |
| 26 Feb, 2026 | John Barkidjija | Head Of Cre Specialty Fin | Disposed S | 4,509 | $32.33 | $145.78K | 19,243 | Direct |
| 26 Feb, 2026 | John Barkidjija | Head Of Cre Specialty Fin | Disposed S | 4,509 | $32.33 | $145.78K | 19,243 | Direct |
| 26 Feb, 2026 | John Barkidjija | Head Of Cre Specialty Fin | Disposed S | 4,509 | $32.33 | $145.78K | 19,243 | Direct |
| 26 Feb, 2026 | John Barkidjija | Head Of Cre Specialty Fin | Disposed S | 4,509 | $32.33 | $145.78K | 19,243 | Direct |
| 26 Feb, 2026 | John Barkidjija | Head Of Cre Specialty Fin | Disposed S | 4,509 | $32.33 | $145.78K | 19,243 | Direct |
| 22 Feb, 2026 | Maria Sherylle A Olano | Svp, Chief Accounting Officer | Acquired A | 2,378 | $0.00 | $0 | 19,800 | Direct |