Guillermo Brown (Primera Nacional): every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Elías Ayala | Dep. Madryn | Guillermo Brown | Loan |
| 2025-06-26 | Agustín Sanchez | Club de Gimnasia y Esgrima La Plata | Guillermo Brown | Loan |
| 2025-06-26 | Renzo Paparelli | Central Norte | Guillermo Brown | Free |
| 2025-03-05 | Nicolás Bazzana | Guillermo Brown | Douglas Haig | Free |
| 2025-03-02 | Francisco Ilarregui | Asociación Atlética Argentinos Juniors | Guillermo Brown | Free |
| 2025-02-20 | Player | Juventud Unida Univ. | Guillermo Brown | Free |
| 2025-02-20 | Agustín Pereyra | San Miguel | Guillermo Brown | Free |
| 2025-02-20 | Player | Guillermo Brown | Germinal de Rawson | Free |
| 2025-02-06 | Valentino Werro | Guillermo Brown | Alvarado | Free |
| 2025-02-04 | Braian Álvarez | Guillermo Brown | Deportes Santa Cruz | Free |
| 2025-01-26 | Nicolás José Herranz | Guillermo Brown | Sportivo Las Parejas | Free |
| 2025-01-23 | Francisco Funes | Guillermo Brown | Metropolitanos | Free |
| 2025-01-09 | Sebastián Giovini | Guillermo Brown | Brown de Adrogué | Free |
| 2025-01-06 | Elías Martínez | Guillermo Brown | Ciudad de Bolívar | Free |
| 2025-01-01 | Renzo Perez | Guillermo Brown | Ciudad de Bolívar | Free |
| 2025-01-01 | Player | Guillermo Brown | Almagro | Free |
| 2025-01-01 | Mauro Fernández | Guillermo Brown | Tristán Suárez | Free |
| 2025-01-01 | Maximiliano Luayza | Guillermo Brown | Almagro | Loan |
| 2024-10-29 | Kevin Lencina | Guillermo Brown | Nacional de Patos | Free |
| 2024-08-28 | Federico Torres | Guillermo Brown | Club Atlético Gimnasia y Esgrima de Mendoza | Free |