Published on November 3, 2025
Exhibit A
JOINT FILING AGREEMENT
The undersigned agree that this Schedule 13G dated November 3, 2025 relating to the Common Stock, $0.0001 par value, of Deep Fission, Inc. shall be filed on behalf of the undersigned.
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EE HOLDINGS LIMITED
By: /s/ Lucy Poignand | |
| Name: Lucy Poignand | |
| Title: Director |
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EDWARD EISLER
By: /s/ Edward Eisler |