| # | Player | Pos | Acquired | NHL Draft |
| 8 | Jamieson, Will | RW | Acquired Via trade with the Everett Silvertips for a seventh-round pick (2027) | |
| 9 | Dunn, Coster | C | Acquired in the WHL Draft by SEA (2020) RD:7 (#139) | |
| 11 | Bagley, Finn | RW | Acquired in the WHL Draft by SEA (2023) RD:5 (#92) | |
| 17 | Rudolph, Brendan | LW | Acquired in the WHL Draft by SEA (2023) RD:7 (#153) | |
| 18 | Gerrior, Colton | C | Acquired in the WHL Draft by SEA (2023) RD:4 (#87) | |
| 22 | Lovsin, Simon | RW | Acquired in the WHL Draft by SEA (2021) RD:2 (#44) | |
| 24 | Brayden Holberton | RW | Acquired in the WHL draft by SEA (2022) RD:10 (#214) | |
| 28 | Huo, William | C | Acquired via undrafted signing 2023 | |
| 29 | Nathan Pilling | LW | Acquired via trade with the Edmonton Oil Kings in exchange for Gracyn Sawchyn. In addition to Pilling, the Thunderbirds receive the following draft picks: 2026 (1st), 2024 (2nd), 2025 (3rd), 2025 (5th), 2024 (7th), a conditional 2027 (2nd), and a conditional 2027 (3rd), while the Oil Kings receive prospects Lukas Sawchyn and Tracen Ashley from Seattle. | |
| 73 | Bawa, Arjun | LW | Acquired via trade with the Prince George Cougars in exchange for Oscar Lovsin | |
| 77 | Mathies, Kazden | LW | Acquired in the WHL Draft by SEA (2022) RD:2 (#38) | |
| 81 | Parmar, Nishaan | RW | Acquired in the WHL Draft by SEA (2021) RD:7 (#148) | |
| 86 | Cootes, Braeden | C | Acquired in the WHL Draft by SEA (2022) RD:1 (#10) | |
| 88 | Pekar, Metej | C | Acquired in the CHL Import Draft by
SEA (2024) RD:1 (#11) |
|
| 89 | Martorana, Antonio | RW | Acquired in the WHL Draft by SEA (2022) RD:4 (#82) | |
| 91 | Charko, Samuel | LW | Acquired in the WHL Draft by SEA (2022) RD:9 (#192) | |
| DEFENCEMEN | ||||
| # | ||||
| 2 | Pawlenchuk, Jaxson | D | Acquired in the WHL Draft by SEA (2022) RD:12 (#258) | |
| 3 | Cumby, Ashton | D | Acquired via trade with the Wenatchee Wild in exchange for a sixth-round pick in 2024 | |
| 5 | Davidson, Hyde | D | Acquired in the WHL Draft by SEA (2021) RD:2 (#24) | |
| 6 | Popil. Vanek | D | Acquired in the WHL Draft by SEA (2023) RD:3 (#65) | |
| 25 | Riley, Tai | D | Acquired via undrafted signing (2023) | |
| 27 | Hartmann, Kaleb | D | Acquired in the WHL Draft by SEA (2022) RD:2 (#37) | |
| 43 | Mynio, Sawyer | D | Acquired in the WHL Draft by SEA (2020) RD:3 (#63) | NHL – VAN (2023) RD:3 (#89) |
| 44 | Boucher, Owen | D | Acquired via trade with the Prince Albert Raiders along with a sixth-round pick in the (2025) in exchange for a fourth-round pick(2027) | |
| GOALIES | ||||
| # | ||||
| Player | Pos | NHL Draft | ||
| 31 | Malinoski, Grayson | G | Acquired via undrafted signing | |
| 33 | Ratzlaff, Scott | G | Acquired in the WHL Draft by SEA (2020) RD:2 (#43) | NHL – BUF (2023) RD:5 (#141) |
| 50 | Dikur, Jaxson | G | Acquired in the WHL Draft by SEA (2023) RD:6 (#129) |
