X0609 4 2026-09-18 0 0001714562 GameSquare Holdings, Inc. GAME 0002007112 Kenna Justin false C/O GAMESQUARE HOLDINGS, INC. 6775 COWBOYS WAY, STE. 1335 FRISCO TX 75034 1 1 0 0 CEO and Director 0 Common Stock 14416 D Common Stock 248283 I See Footnote Common Stock 2026-09-18 4 M 0 52313 A 300596 I See Footnote Common Stock 2026-09-18 4 M 0 21791 A 322387 I See Footnote Options to Purchase Common Stock Common Stock 165878 D Options to Purchase Common Stock 3.31 2026-09-18 4 A 0 52313 0 A 2031-09-18 Common Stock 52313 218191 D Restricted Stock Units Common Stock 68666 D Restricted Stock Units 2026-09-18 4 A 0 52313 0 A Common Stock 52313 120979 D Restricted Stock Units 2026-09-18 4 M 0 52313 0 D Common Stock 52313 68666 D Restricted Stock Units 2026-09-18 4 M 0 21791 0 D Common Stock 21791 46875 D Balance from prior Form 4 updated to reflect 1 for 8 reverse stock split which occurred on August 24, 2026. Represents shares acquired on vesting and settlement of restricted stock units ("RSUs") granted to the Reporting Person on September 18, 2026. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. Reflects the one-time grant under the Issuer's 2024 Stock Incentive Plan, as amended, on September 18, 2026 (the "Grant Date"), of options to purchase an aggregate of 52,313 shares of the Issuer's Common Stock, each representing a contingent right to receive one share of the Issuer's Common Stock. The grant vests in full on the Grant Date. Reflects the one-time grant under the Issuer's 2024 Stock Incentive Plan, as amended, on September 18, 2026, of 52,313 RSUs, which vest on the Grant Date and will convert into one share of Issuer's Common Stock. Represents shares acquired on vesting and settlement of RSUs granted to the Reporting Person on July 11, 2025. Shares are held indirectly by Justin Kenna through Kenna Holdings Inc. Justin Kenna is the sole director and shareholder of Kenna Holdings Inc. /s/ Justin Kenna 2026-09-22