Form 4 Filing for CubeSmart Executive Timothy M. Martin

This filing reports a transaction by Timothy M. Martin, CFO of CubeSmart. On July 15, 2026, Martin acquired 301 phantom shares of CubeSmart common stock through the reinvestment of dividend equivalents. These phantom shares, valued at $40.46 per share, are part of the CubeSmart Trust Executive Deferred Compensation Plan. They are payable in cash after Martin ceases employment and can be transferred by reallocating investment options. Following this transaction, Martin holds a total of 23,264 phantom shares. The underlying security for these phantom shares is CubeSmart common stock.