CubeSmart

We are a self-administered and self-managed real estate company focused primarily on the ownership, operation, management, acquisition and development of self-storage properties in the United States.

As of December 31, 2023, we owned (or partially owned and consolidated) 611 self-storage properties located in 24 states and in the District of Columbia containing an aggregate of approximately 44.1 million rentable square feet. As of December 31, 2023, approximately 89.8% of the rentable square footage at our owned stores was leased to approximately 379,000 customers, and no single customer represented a significant concentration of our revenues. As of December 31, 2023, we owned stores in the District of Columbia and the following 24 states: Arizona, California, Colorado, Connecticut, Florida, Georgia, Illinois, Indiana, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New Mexico, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Utah and Virginia. In addition, as of December 31, 2023, we managed 795 stores for third parties (including 77 stores containing an aggregate of approximately 5.6 million net rentable square feet as part of six separate unconsolidated real estate ventures) bringing the total number of stores we owned and/or managed to 1,406. As of December 31, 2023, we managed stores for third parties in the District of Columbia and the following 40 states: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Vermont, Virginia, Washington and Wisconsin.

Our self-storage properties are designed to offer affordable and easily-accessible storage space for our residential and commercial customers. Our customers rent storage cubes for their exclusive use, typically on a month-to-month basis. Additionally, some of our stores offer outside storage areas for vehicles and boats. Our stores are designed to accommodate both residential and commercial customers, with features such as wide aisles and load-bearing capabilities for large truck access. All of our stores have a storage associate or automated kiosk available to assist our customers during business hours, and 336, or approximately 55.0%, of our owned stores have a manager who resides in an apartment at the store. Our customers can access their storage cubes during business hours, and some of our stores provide customers with 24-hour access through computer-controlled access systems. Our goal is to provide customers with the

highest standard of physical attributes and service in the industry. To that end, 510, or approximately 83.5%, of our owned stores include climate-controlled cubes.

The Parent Company was formed in July 2004 as a Maryland REIT. The Parent Company owns its assets and conducts its business through the Operating Partnership, and its subsidiaries. The Parent Company controls the Operating Partnership as its sole general partner and, as of December 31, 2023, owned a 99.4% interest in the Operating Partnership. The Operating Partnership was formed in July 2004 as a Delaware limited partnership and has been engaged in virtually all aspects of the self-storage business, including the development, acquisition, management, ownership and operation of self-storage properties.

Acquisition and Disposition Activity

As of December 31, 2023 and 2022, we owned 611 stores that contained an aggregate of 44.1 million rentable square feet with occupancy levels of 89.8% and 90.3%, respectively. Additional information about our stores is included in Item 2 of this Report. The following is a summary of our 2023, 2022 and 2021 acquisition and disposition activity:

The comparability of our results of operations is affected by the timing of acquisition and disposition activities during the periods reported. As of December 31, 2023, 2022 and 2021, we owned (or partially owned and consolidated) 611, 611 and 607 self-storage

properties and related assets, respectively. The following table summarizes the change in number of owned stores from January 1, 2021 through December 31, 2023:

Financing and Investing Activities

The following summarizes certain financing and investing activities during the year ended December 31, 2023:

Business Strategy

Our business strategy consists of several elements:

Investment and Market Selection Process

We maintain a disciplined and focused process in the acquisition and development of self-storage properties. Our investment committee is comprised of four executive officers who oversee our investment process. Our investment process involves six stages — identification, initial due diligence, economic assessment, investment committee approval (and when required, the approval of our Board of Trustees (the “Board”)), final due diligence and documentation. Through our investment committee, we intend to focus on the following criteria:

Segment

We have one reportable segment: we own, operate, develop, manage and acquire self-storage properties.

Concentration

Our self-storage properties are located in major metropolitan areas as well as suburban areas and have numerous customers per store. No single customer represented a significant concentration of our 2023 revenues. Our stores in New York, Florida, California and Texas provided approximately 17%, 15%, 11% and 9%, respectively, of our total revenues for the year ended December 31, 2023. Our stores in New York, Florida, California and Texas provided approximately 16%, 15%, 11% and 9%, respectively, of our total revenues for the year ended December 31, 2022. Our stores in New York, Florida, Texas and California provided approximately 19%, 15%, 9% and 8%, respectively, of our total revenues for the year ended December 31, 2021.

Seasonality

We typically experience seasonal fluctuations in occupancy levels at our stores, which are generally slightly higher during the summer months due to increased moving activity.

Financing Strategy

We maintain a capital structure that we believe is reasonable and prudent and that will enable us to have ample cash flow to cover debt service and make distributions to our shareholders. As of December 31, 2023, our debt to total market capitalization ratio (determined by dividing the carrying value of our total indebtedness by the sum of (a) the market value of the Parent Company’s outstanding common shares and units of the Operating Partnership held by third parties and (b) the carrying value of our total indebtedness) was approximately 21.8% compared to approximately 24.8% as of December 31, 2022. Our ratio of debt to the undepreciated cost of our total assets as of December 31, 2023 was approximately 38.2% compared to approximately 39.6% as of December 31, 2022. We expect to finance additional investments in self-storage properties through the most attractive sources of capital available at the time of the transaction, in a

manner consistent with maintaining a strong financial position and future financial flexibility, subject to limitations on incurrence of indebtedness under our unsecured credit facilities and the indenture that governs our unsecured notes. These capital sources may include existing cash, borrowings under our revolving credit facility, additional secured or unsecured financings, sales of common or preferred shares of the Parent Company in public offerings or private placements, additional issuances of debt securities, issuances of common or preferred units in our Operating Partnership in exchange for contributed properties and formations of joint ventures. We also may sell stores that have unattractive risk-adjusted returns and use the sales proceeds to fund other acquisitions.

Competition

Self-storage properties compete based on a number of factors, including location, rental rates, occupancy, security, suitability of the store’s design to prospective customers’ needs and the manner in which the store is maintained, operated and marketed. In particular, the number of competing self-storage properties in a market could have a material effect on our occupancy levels, rental rates and on the overall operating performance of our stores. We believe that the primary competition for potential customers of any of our self-storage properties comes from other self-storage providers within a three-mile radius of that store. We emphasize customer service, convenience, security, professionalism, and cleanliness and, therefore, we believe our stores are well-positioned within their respective markets.

Our key competitors include local and regional operators as well as the other public self-storage REITs, including, but not limited to, Public Storage, Extra Space Storage Inc., and National Storage Affiliates Trust. These companies, some of which operate significantly more stores than we do and have greater resources than we have, and other entities may be able to accept more risk than we determine is prudent for us, including risks with respect to the geographic proximity of investments and the payment of higher acquisition prices. This competition may reduce the number of suitable acquisition opportunities available to us, increase the price required to acquire stores and reduce the demand for self-storage space at our stores. Nevertheless, we believe that our experience in operating, managing, acquiring, developing and obtaining financing for self-storage properties should enable us to compete effectively.

Government Regulation

We are subject to various laws, ordinances and regulations, including regulations relating to lien sale rights and procedures, consumer protection measures and various federal, state and local regulations that apply generally to the ownership of real property and the operation of self-storage properties.

Under the Americans with Disabilities Act of 1990 and applicable state accessibility act laws (collectively, the “ADA”), all places of public accommodation are required to meet federal requirements related to physical access and use by disabled persons. A number of other federal, state and local laws may also impose access and other similar requirements at our stores. A failure to comply with the ADA or similar state or local requirements could result in the governmental imposition of fines or the award of damages to private litigants affected by the noncompliance. Although we believe that our stores comply in all material respects with these requirements (or would be eligible for applicable exemptions from material requirements because of adaptive assistance provided), a determination that one or more of our stores or websites is not in compliance with the ADA or similar state or local requirements would result in the incurrence of additional costs associated with bringing them into compliance.

Under various federal, state and local laws, ordinances and regulations, an owner or operator of real property may become liable for the costs of removal or remediation of hazardous substances released on or in its property. These laws often impose liability without regard to whether the owner or operator knew of, or was responsible for, the release of such hazardous substances. The presence of hazardous substances, or the failure to properly remediate such substances, when released, may adversely affect the property owner’s ability to sell the real estate or to borrow using the real estate as collateral, and may cause the property owner to incur substantial remediation costs. In addition to claims for cleanup costs, the presence of hazardous substances on a property could result in a claim by a private party for personal injury or a claim by an adjacent property owner or user for property damage. We may also become liable for the costs of removal or remediation of hazardous substances stored at our properties by a customer even though storage of hazardous substances would be without our knowledge or approval and in violation of the customer’s storage lease agreement with us.

Our practice is to conduct or obtain environmental assessments in connection with the acquisition or development of properties. Whenever the environmental assessment for one of our stores indicates that a store is impacted by soil or groundwater contamination from prior owners/operators or other sources, we work with our environmental consultants and, where appropriate, state governmental agencies, to ensure that the store is either cleaned up, that no cleanup is necessary because the low level of contamination poses no significant risk to public health or the environment, or that the responsibility for cleanup rests with a third party. In certain cases, we have purchased environmental liability insurance coverage to indemnify us against claims for existing or suspected contamination or other adverse environmental conditions that may affect a property.

We are not aware of any environmental cleanup liability that we believe will have a material adverse effect on us. We cannot provide assurance, however, that these environmental assessments and investigations have revealed or will reveal all potential environmental liabilities, that no prior owner created any material environmental condition not known to us or the independent consultant or that future events or changes in environmental laws will not result in the imposition of environmental liability on us.

We have not received notice from any governmental authority of any material noncompliance, claim or liability in connection with any of our stores, nor have we been notified of a claim for personal injury or property damage by a private party in connection with any of our stores relating to environmental conditions.

We are not aware of any environmental condition with respect to any of our stores that could reasonably be expected to have a material adverse effect on our financial condition or results of operations, and we do not expect that the cost of compliance with environmental regulations will have a material adverse effect on our financial condition or results of operations. We cannot provide assurance, however, that this will continue to be the case.

Insurance

We carry comprehensive liability, fire, casualty, extended coverage and rental loss insurance covering all of the properties in our portfolio. We also carry environmental insurance coverage on certain stores in our portfolio. We believe the policy specifications and insured limits are appropriate and adequate given the relative risk of loss, the cost of the coverage and industry practice. We do not carry insurance for losses such as loss from civil unrest, riots, war or acts of God, pandemics, and, in some cases, flood and environmental hazards, because such coverage is either not available or not available at commercially reasonable rates. Some of our policies, such as those covering losses due to terrorism, hurricanes, floods, earthquakes and windstorms, are insured subject to limitations involving large deductibles or co-payments and policy limits that may not be sufficient to cover losses. Additionally, we use a combination of insurance products, some of which include deductibles and self-insured retention amounts, to provide risk mitigation for potential liabilities associated with automobiles, workers’ compensation, employment practices, general contractors, cyber risks, crime, directors and officers, employee health-care benefits, fiduciary obligations, managerial errors and omissions and personal injuries that might be sustained at our stores.

Offices

Our principal executive offices are located at 5 Old Lancaster Road, Malvern, PA 19355. Our telephone number is (610) 535-5000.

Human Capital

At CubeSmart, we refer to our employees as teammates, because collaboration towards shared goals defines our workplace. We care deeply about the experience our teammates have working with us. The CubeSmart work experience takes a holistic approach to our teammates’ total wellbeing. Our teammate value proposition includes promoting a sense of belonging to a team; providing opportunities to make a meaningful difference at work and in their communities; supporting our teammates’ ongoing personal and professional development; and offering competitive pay and rewards.

As of December 31, 2023, we employed 3,040 teammates, all within the United States. Of the total employees, approximately 89% were hourly and approximately 11% were salaried. We have no union presence or collective bargaining agreements. Our average teammate tenure as of December 31, 2023 was 3.5 years.

Company Culture and Teammate Experience

We measure our teammates’ experience each year through our Teammate Engagement Survey. In 2023, our annual engagement survey participation rate was 92%. Results are communicated within individual teams to share what we learned and discuss both the positive aspects about working at CubeSmart and where we have opportunities to improve. Leaders with team engagement below a certain threshold are provided with coaching and set goals for improvement. In addition to the survey and our focused support for teams who need it, we have ongoing conversations and commit to continuous improvement. Every CubeSmart teammate plays a role in building our company culture and making the experience working here the best it can be.

Teammate Development and Wellbeing

As part of our culture, we seek to help teammates grow with us and leverage their development both at CubeSmart and beyond. We believe in providing all teammates with training and development opportunities to succeed in their role. We plan, design and deliver

training programs for all levels of the organization, from orientation and general job skills to enhancing leadership capabilities through skills trainings and mentoring. In 2023, we provided an average of 18 hours of training per teammate.

When recruiting new teammates, our talent acquisition team engages with our store management teams and corporate leaders to identify a pool of potential candidates to serve our customers and deliver best-in-class customer service. We recruited, hired and trained 1,651 teammates during the year ended December 31, 2023. Teammate referrals were a significant source for the candidates we hired, accounting for 18% of our new teammates. Additionally, 350 teammates were promoted into new roles and/or transitioned into new positions to further their career development.

We believe that career growth and personal development is an important part of our teammates’ personal and professional success. To further support our teammates’ success, we offer a number of benefits aimed at supporting the wellbeing of our teammates and their families. Those benefits include: medical, dental, vision, disability and life insurance coverage. We also offer a variety of programs designed to provide teammates with the ability to rest, rejuvenate and take care of their families such as paid holidays, vacation and sick time, and parental leave. Our Employee Assistance Program is available to all teammates, providing extra support as they and their families experience life changes and challenges.

Another important part of our teammates’ wellbeing is their connection to a larger sense of purpose. We empower our teammates to find this with us and provide programs and opportunities for them. Our Idea Center provides a forum where teammates can submit ideas to enhance the workplace, streamline systems and processes and identify solutions and best practices. We encourage our teammates to participate in community service and philanthropy, and provide paid time off for teammates who participate in these activities. Also, through our matching gifts program, we match qualified charitable contributions made by teammates up to $100 per teammate each year.

Diversity and Inclusion

In February 2023, we adopted a Diversity, Equality and Inclusion Policy in addition to our existing Philosophy Regarding Respect in the Workplace. Our policy can be found in the Corporate Responsibility section of our internet website (www.cubesmart.com) and details our commitments to support and promote diversity, equality, and inclusion. Nothing on our website, including our Diversity, Equality and Inclusion Policy or sections thereof, shall be deemed incorporated by reference into this Annual Report.

As of December 31, 2023, of our total teammate population, 56% were female and 44% were male. Approximately 45% have self-identified as Black or African American, Hispanic or Latino, Asian, American Indian, or of two or more races. The average teammate age was 42; 35% of our teammates were 34 and younger, while 40% of our teammates were 45 or older.

Sustainability

We are focused on building our company for the long term to generate sustainable growth. To that end, we have established a cross-functional ESG (Environmental, Social, & Governance) committee responsible for establishing our sustainability priorities and objectives. Management regularly evaluates sustainability risks faced by our portfolio and believe the low obsolescence, geographic diversification, and low emissions of our portfolio help to mitigate those risks. Our senior management team reports annually to the Board on the status of our ESG program, our progress against the goals we’ve set, and provides updates on the various initiatives we’ve undertaken to improve our sustainability. Our efforts to enact change are highlighted by our sustainability targets which look to track improvements across key ESG metrics and are aligned to the United Nations Sustainable Development Goals.

A key area of focus from a sustainability perspective is minimizing the impact we make on the environment. Self-storage remains a low-environmental impact business as it consumes less energy and water while emitting fewer greenhouse gases than other real estate property types. We continue to look for ways to further reduce our low impact through a variety of initiatives including solar panel installations, HVAC upgrades, high-efficiency lighting retrofits, green roofs, energy management systems, and paper reduction through our electronic rental platform.

We encourage you to review our Sustainability Report, which can be found in the Corporate Responsibility section of our website, for more detailed information regarding our sustainability programs and initiatives. Nothing on our website, including our Sustainability Report or sections thereof, shall be deemed incorporated by reference into this Annual Report.

Available Information

We file registration statements, proxy statements, annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports with the SEC. You may obtain copies of these documents by accessing the SEC’s website at

www.sec.gov. Our website address is www.cubesmart.com. You also can obtain on our website, free of charge, copies of our annual reports on Form 10-K, our quarterly reports on Form 10-Q, our current reports on Form 8-K and any amendments to those reports, after we electronically file such reports or amendments with, or furnish them to, the SEC. Our website and the information contained therein or connected thereto are not intended to be incorporated by reference into this Report.

Also available on our website, free of charge, are copies of our Code of Business Conduct and Ethics, our Corporate Governance Guidelines and the charters for each of the committees of our Board — the Audit Committee, the Corporate Governance and Nominating Committee and the Compensation Committee. Copies of each of these documents are also available in print free of charge, upon request by any shareholder. You can obtain copies of these documents by contacting Investor Relations at 5 Old Lancaster Road, Malvern, PA 19355 or by telephoning 610-535-5000.