Spartak Kostroma (Russian First League): every transfer in and out, fees paid and earned, squad market value, €416k spent and €150k earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-19 | David Khubaev | Spartak Kostroma | KamAZ | Loan |
| 2026-07-28 | Nader Mohammadi | Zob Ahan | Spartak Kostroma | Free |
| 2026-07-24 | Gennadiy Kiselev | Spartak Kostroma | Leningradets | Free |
| 2026-07-23 | R. Chervyakov | Chayka | Spartak Kostroma | Free |
| 2026-07-22 | Marko Bugarin | Bunyodkor | Spartak Kostroma | Free |
| 2026-07-17 | Oleg Nikiforenko | FK Radnicki Nis | Spartak Kostroma | Free |
| 2026-07-14 | Đorđe Pantelić | Spartak Kostroma | Atyrau | Free |
| 2026-07-11 | Maksim Chikanchi | Spartak Kostroma | Sibir | Free |
| 2026-07-10 | Dmitriy Kaptilovich | Chayka | Spartak Kostroma | Free |
| 2026-07-08 | Georgi Uridia | Spartak Kostroma | Arsenal Tula | Free |
| 2026-07-07 | Vladislav Lyakh | Spartak Kostroma | Dinamo Brest | Free |
| 2026-07-05 | Dmitriy Sadov | Spartak Kostroma | Veles Moscow | Free |
| 2026-07-02 | Amir Mokhammad | Kaisar | Spartak Kostroma | Free |
| 2026-07-02 | Marat Tlekhugov | Spartak Kostroma | Yenisey Krasnoyarsk | Free |
| 2026-07-01 | Egor Shamov | Yenisey Krasnoyarsk | Spartak Kostroma | Free |
| 2026-07-01 | Vladislav Kamilov | FK Ufa | Spartak Kostroma | Free |
| 2026-07-01 | David Karaev | KamAZ | Spartak Kostroma | €100k |
| 2026-07-01 | Kirill Malyarov | Shinnik | Spartak Kostroma | €70k |
| 2026-07-01 | Nikita Demchenko | FC Vizela | Spartak Kostroma | Free |
| 2026-07-01 | Dimitri Gurtskaia | Meshakhte | Spartak Kostroma | Free |