PROSPECTUS SUMMARY

        This summary highlights some of the information in this prospectus. It does not contain all of the information that you should consider before investing in our common shares. You should carefully read the more detailed information set forth under "Risk Factors" and the other information included in this prospectus. Certain technical and other terms used in this prospectus are defined under the heading "Certain Defined Terms" on p. ii above.

        Unless otherwise indicated, the information contained in this prospectus assumes that (1) the formation transactions described under "The Formation and Structure of our Company" have been completed, (2) the common shares to be sold in the offering are sold at $            per share, which is the mid-point of the initial public offering price range shown on the cover page of this prospectus, and (3) the underwriters' option to purchase additional shares is not exercised.

Company Overview

Our Company

        National Storage Affiliates Trust is a Maryland real estate investment trust focused on the ownership, operation, and acquisition of self-storage properties located within the top 100 metropolitan statistical areas, or MSAs, throughout the United States. According to the 2014 Self-Storage Almanac, we are the sixth largest owner and operator of self-storage properties and the largest privately-owned operator of self-storage properties in the United States based on number of properties, units, and rentable square footage. Upon the completion of this offering and the formation transactions, we will own 235 self-storage properties, which we refer to as our in-place portfolio. Our in-place portfolio is located in 14 states, comprises approximately 13.2 million rentable square feet and is configured in over 100,000 storage units. In addition, we have a pipeline of potential acquisitions consisting of 125 properties (13 of which we have under contract to acquire), comprising approximately 8.1 million rentable square feet.

        Our chief executive officer, Arlen D. Nordhagen, co-founded SecurCare Self Storage, Inc. in 1988 to invest in and manage self-storage properties. While growing SecurCare to over 150 self-storage properties, Mr. Nordhagen recognized a market opportunity for a differentiated public self-storage REIT that would leverage the benefits of national scale by integrating multiple experienced regional self-storage operators with local operational focus and expertise. We believe that his vision, which is the foundation of our company, aligns the interests of regional self-storage operators with those of public shareholders by allowing the operators to participate alongside shareholders in the financial performance of our company and their contributed portfolios. A key component of this strategy is to capitalize on the local market expertise and knowledge of regional self-storage operators by maintaining the continuity of their roles as property managers.

        We believe that our structure creates the right financial incentives to accomplish these objectives. We require our participating regional operators, or PROs, to exchange the self-storage properties they contribute to our company for a combination of common equity interests, or OP units, and subordinated performance units in our operating partnership or DownREIT partnerships. OP units, which are economically equivalent to our common shares, create alignment with the performance of our company as a whole. Subordinated performance units, which are linked to the performance of specific contributed portfolios, incentivize our PROs to drive operating performance and support the sustainability of the operating cash flow, generated by the contributed self-storage properties that they continue to manage on our behalf. Because subordinated performance unit holders receive distributions only after portfolio-specific minimum performance thresholds are satisfied, subordinated performance units play a key role in aligning the interests of our PROs with us and our shareholders. Our structure thus offers PROs a unique opportunity to serve as regional property managers for their contributed properties and directly participate in the potential upside of those properties while simultaneously

 

diversifying their investment to include a broader portfolio of self-storage properties. We believe our structure provides us with a competitive growth advantage over self-storage companies that do not offer property owners the ability to participate in the performance and potential future growth of their contributed portfolios.

        We believe that our national platform has significant potential for external and internal growth. We seek to expand our platform by recruiting additional established self-storage operators, while integrating our operations through the implementation of centralized initiatives, including management information systems, revenue enhancement and cost optimization programs. We are currently engaged in preliminary discussions with additional self-storage operators and believe that we could add several additional PROs over the next two to three years. These additional operators will enhance our existing geographic footprint and allow us to enter regional markets in which we currently have limited or no market share. In addition, we believe the implementation of best practices across our portfolio and leveraging economies of scale will allow us to more effectively grow internally through increased occupancy, rents and margins, which will drive cash flow growth across our portfolio. As of June 30, 2014, our occupancy rate across our in-place portfolio was approximately 87%.

        We are organized as a Maryland real estate investment trust and intend to elect to be taxed as a REIT for U.S. federal income tax purposes, commencing with our short taxable year ending December 31, 2015. We generally will not be subject to U.S. federal income tax on our net taxable income to the extent that we distribute annually all of our net taxable income to our shareholders and maintain our intended qualification as a REIT. We serve as the sole general partner of, and operate our business through, our operating partnership subsidiary, NSA OP, LP, a Delaware limited partnership. Our operating partnership enables us to facilitate additional tax deferred acquisitions using both OP units and subordinated performance units as currency for these transactions.

Our PROs

        SecurCare has been operating since 1988 and, in connection with the launch of our company in April 2013, was joined by two additional PROs: Northwest, which has been operating since 1977, and Optivest, which has been operating since 2007. Guardian, which has been operating since 1984, joined our company as a PRO in February 2014. In July 2014, Move It and Storage Solutions were added as our fifth and sixth PROs, respectively. Our PROs have collectively contributed the vast majority of their properties to our company as part of the formation transactions.

        We believe our structure allows our PROs to optimize their established property management platforms while addressing financial and operational hurdles. Before joining us, our PROs faced challenges in securing low cost capital and had to manage multiple investors and lending relationships, making it difficult to compete with larger competitors, including public REITs, for acquisition and investment opportunities. Our PROs were also limited in their ability to raise growth capital through the sale of assets, a portfolio refinancing or capital contributions from new equity partners. Serving as our on-the-ground acquisition teams, our PROs now have access to our broader financing sources and lower cost of capital while our national platform allows them to benefit from our economies of scale to drive operating efficiencies in a rapidly evolving, technology driven industry.

        We benefit from the local market knowledge and active presence of our PROs, allowing us to build and foster important customer and industry relationships. These local relationships provide attractive off-market acquisition opportunities that we believe will continue to fuel additional external growth. Newly acquired properties are integrated into our national platform and managed by our PROs.

 

        The following table summarizes the properties in our in-place portfolio and our pipeline that are managed by our PROs as of June 30, 2014:

        To capitalize on their recognized and established local brands, our PROs will continue to function as property managers for their contributed properties under their existing brands. Over the long-run, we may seek to brand or co-brand each location as part of NSA.

 

 

Our Competitive Strengths

        We believe our unique PRO structure allows us to differentiate ourselves from other self-storage operators, and the following competitive strengths enable us to effectively compete against our industry peers:

        High Quality Properties in Key Growth Markets.    Upon the completion of this offering and the formation transactions, we will own a large, geographically diversified portfolio of 235 self-storage properties located in 14 states and over 50 MSAs. We believe that these properties are primarily located in high quality growth markets within the top 100 MSAs that have attractive supply and demand characteristics and are less sensitive to the fluctuations of the general economy. Our top 10 states, (based on our net operating income, or NOI, for the second quarter of 2014) are expected to grow over 50% faster than the national average for population and job growth, as projected by the U.S. Department of Labor's Bureau of Labor Statistics. These 10 states accounted for over 95% of our second quarter 2014 NOI. Many of these markets tend to have multiple barriers to entry against increased supply, including zoning restrictions against new construction and new construction costs that we believe are higher than our properties' fair market value. We seek to own properties that are well located in high quality sub-markets with highly accessible street access, providing our properties with strong and stable cash flows. Furthermore, we believe that our significant size and the overall geographic diversification of our portfolio reduces risks associated with specific local or regional economic downturns or natural disasters.

        Differentiated, Growth Oriented Strategy Focused on Established Operators.    We are a self-storage REIT with a unique structure that supports our differentiated external growth strategy. Our structure appeals to operators who are looking for access to growth capital while maintaining an economic stake in the self-storage properties that each has contributed to our company and continues to manage on our behalf. These attributes entice operators to join our company rather than sell their properties for cash consideration. Our strategy is to attract operators who are confident in the performance of their properties and desire to participate in the future growth of our company. We are focused on recruiting established operators across the United States with a history of efficient property management and a track record of successful acquisitions. Our structure and differentiated strategy have enabled us to build a substantial pipeline from existing operators as well as potentially create external growth from future operators.

        Integrated Platform Utilizing Advanced Technology for Enhanced Operational Performance and Best Practices.    Our national platform allows us to capture cost savings through integration and centralization, thereby eliminating redundancies and utilizing economies of scale across the property management platforms of our PROs. As compared to a stand-alone operator, our national platform has greater access to lower-cost capital, reduced Internet marketing costs per customer lead, discounted property insurance expense, and reduced overhead costs. In addition, our company has sufficient scale for national and bulk purchasing and has centralized various functions, including financial reporting, call center operations, marketing, information technology, legal support, and capital market functions, to achieve substantial cost savings over smaller, individual operators.

        Our national platform utilizes advanced technology for Internet marketing, call center operations, financial and property analytic dashboards, revenue optimization analytics and expense management tools to enhance operational performance. These centralized programs, which are run through our Technology and Best Practices Group, are positively impacting our business performance, and we believe that they will be a driver of organic growth going forward. We will utilize our Technology and Best Practices Group to help us benefit from the collective sharing of key operating strategies among our PROs in areas like human resource management, local marketing and operating procedures.

        Aligned Incentive Structure with Shareholder Downside Protection.    Our structure promotes operator accountability as subordinated performance units issued to our PROs in exchange for the contribution

 

of their properties are entitled to distributions only after those properties satisfy minimum performance thresholds. In the event of a material reduction in operating cash flow, distributions on our subordinated performance units will be reduced before distributions on our common shares held by our common shareholders. In addition, we expect our PROs will generally co-invest subordinated equity in the form of subordinated performance units in each acquisition that they source, and the value of these subordinated performance units will fluctuate with the performance of their contributed properties. Therefore, our PROs are incentivized to select acquisitions that are expected to exceed minimum performance thresholds, thereby increasing the value of their subordinated equity stake. We expect that our shareholders will benefit from the higher levels of property performance that our PROs are incentivized to deliver.

        Attractive Sector with Strong Underlying Fundamentals and Historic Outperformance.    Self-storage industry fundamentals are robust, with many properties operating at optimal revenue-producing occupancy and favorable industry dynamics resulting in pricing power for self-storage operators. Operators are able to achieve high same-store occupancy levels through a diverse base of customer demand from individuals as well as businesses. Based on these favorable supply and demand dynamics, we believe that disciplined self-storage operators will generate revenue growth in the near term and will continue to drive revenue performance throughout various economic cycles. We believe that overhead costs and maintenance capital expenditures are considerably lower in the self-storage industry as compared to other real estate sectors, and as a result, self-storage companies are able to achieve comparatively higher operating and cash flow margins. The self-storage sector's fundamentals have consistently established it as one of the strongest performing sectors among all classes of real estate over the last twenty years. The National Association of Real Estate Investment Trusts, or NAREIT, has tracked total return performance of the real estate equity sector since 1994, and from that time through December 31, 2013, the self-storage equity REIT sector has returned an average of over 17% on an annual total return basis compared to the average annual total return of approximately 12% for all other equity REIT sectors.

        Experienced Senior Management Team with Deep Operating and Public Company Experience.    Our senior management team has an established executive leadership track record, aided by their extensive knowledge of the self-storage sector and experience in the ownership, management, and development of self-storage properties. Our chief executive officer, Arlen D. Nordhagen, and chief financial officer, Tamara D. Fischer, bring accomplished backgrounds with an average of 25 years of experience in multiple management capacities at both public and private companies. As a successful entrepreneur involved in the start-up and growth of several public and private companies, Mr. Nordhagen was one of the founders of SecurCare in 1988 and led the company through a period of rapid growth. In addition to SecurCare, Mr. Nordhagen was a founder of MMM Healthcare, Inc., the largest provider of Medicare Advantage health insurance in Puerto Rico. He has also served as managing member of various private investment funds and held various managerial positions at E. I. DuPont De Nemours and Company, or DuPont, and Synthetech, Inc. Ms. Fischer also brings substantial managerial and public company experience to us. Prior to joining us, Ms. Fischer was executive vice president and chief financial officer of Vintage Wine Trust Inc., a REIT formed for the purpose of providing triple-net lease financing to owners and operators of wineries, vineyards, and other wine-related facilities. Ms. Fischer also served as executive vice president and chief financial officer of Chateau Communities Inc., one of the largest public REITs in the manufactured home community sector. In that capacity, Ms. Fischer oversaw the company's initial public offering, multiple merger and acquisition transactions, as well as ongoing capital markets activities, investor relations, financial reporting, and administrative responsibilities. Ms. Fischer remained at Chateau through its sale to Hometown America LLC in 2003.

        Our seasoned PROs also have highly experienced management teams averaging over 30 years of industry experience as well as deep industry knowledge of key markets and extensive national networks of industry relationships.

 

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David Cramer, a principal of SecurCare, joined the company in 1998, and has more than 15 years of experience in the self-storage industry, growing SecurCare's portfolio from 20 properties to over 150 properties during his tenure. He is an active member of the Large Owners Council of the Self Storage Association and is a board member of FindLocalStorage.com, an industry digital marketing consortium.



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Kevin Howard, a principal of Northwest, founded the company in 1977 and built it into one of the largest privately-owned portfolios of self-storage properties in the Pacific Northwest. He was one of the earliest members of the Self Storage Association in the mid-1970s, serving on its board of directors during several of the early years of its existence.



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Warren Allan, principal of Optivest, has over 25 years of financial and operational management experience, during which time he helped structure over 25 real estate partnerships to acquire self-storage properties in various regions nationwide. Prior to founding Optivest in 2007, Mr. Allan served as both chief operating officer and chief financial officer of another self-storage management company, Platinum Storage, since its founding in 2000.



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John Minar, principal of Guardian, has been involved in the self-storage industry since 1984. Mr. Minar formed Guardian in 1999 and is the owner and manager of Guardian's portfolio, which has properties located in southern California and Arizona. Mr. Minar has been involved in the acquisition, rehabilitation, ownership, and development of real estate since 1977, and is active in the Large Owners Council of the Self Storage Association.



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Tracy Taylor, principal of Move It, has been involved in the self-storage industry for more than 40 years. He founded Move It and is the manager of Move It's portfolio, which has properties in Texas, Tennessee and North Carolina. He served on the board of directors of the Self Storage Association from 2006 through 2011, serving as chairman of the board in 2010. He has also served on the board of directors for the Large Owners Council of the Self Storage Association since 2012.



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Bill Bohannan, principal of Storage Solutions, has been involved in the self-storage industry for more than 30 years and is one of the largest operators of self-storage properties in the Phoenix, Arizona MSA. A recognized industry expert, Mr. Bohannan has been a speaker, and has instructed various courses, for the Self Storage Association for several years.

        We believe our deep and cohesive management structure has the relevant skills and experience necessary to effectively grow our company. Upon the completion of this offering and the formation transactions, we expect that our senior management team, including our chief executive officer, representatives of our PROs who serve on our board of trustees and PRO advisory committee, and our chief financial officer, will own approximately        % of our equity on a fully diluted basis.

Our Business and Growth Strategies

        By capitalizing on our competitive strengths, we seek to increase scale, achieve optimal revenue-producing occupancy and rent levels, and increase long-term shareholder value by achieving sustainable long-term growth. Our business and growth strategies to achieve these objectives are as follows:

        Increase Occupancy of In-Place Portfolio.    Existing public self-storage REITs are operating with a weighted average occupancy level of approximately 93% as of June 30, 2014, which we believe is at or near optimal revenue-producing occupancy. Our in-place portfolio occupancy was approximately 87% as of June 30, 2014, reflecting a gap of approximately 6% compared to the average occupancy of the existing public self-storage REITs. Through utilization of our centralized call centers, integrated Internet marketing strategies and best practices protocols, we expect our PROs will be able to increase rental conversion rates resulting in increasing occupancy levels. We believe that a 1% improvement in our average occupancy for our in-place portfolio will translate to an approximate $         million improvement in revenue. We would expect a similar increase in NOI subject to marginal increases in operating expenses.

 

        Maximize Property Level Cash Flow.    We strive to maximize the cash flows at our properties by leveraging the economies of scale provided by our national platform, including through the implementation of new ideas derived from our Technology and Best Practices Group. We believe that our unique PRO structure, centralized infrastructure and efficient national platform will enable us to achieve optimal market rents and occupancy, reduce operating expenses and increase the sale of ancillary products and services, including tenant insurance, rental moving equipment and packing supplies.

        Acquire Built-in Pipeline of Target Properties from Existing PROs.    We have an attractive, high quality pipeline of potential future acquisitions that we anticipate will drive our initial growth. We are under contract to acquire 13 properties representing approximately 750,000 rentable square feet upon the completion of the debt assumption process, which we expect to complete in the first six months of 2015 (with respect to 12 properties) and in 2016 (with respect to one property). In addition, within our pipeline of potential acquisition candidates, our PROs manage 112 properties, comprising approximately 7.3 million rentable square feet. The pipeline from existing PROs includes 29 properties that our PROs have an ownership interest in and we have a right to acquire such interests (i) in the event that our PRO seeks to transfer such interests or (ii) upon maturity of outstanding indebtedness encumbering such properties so long as the occupancy of such properties is consistent with average local market levels at such time, 20 properties that our PROs currently have an ownership interest in but do not control, and 63 properties that our PROs currently manage without an ownership interest. We generally anticipate making offers to acquire these properties when the existing property-level debt matures or the prepayment of such debt is economical. We may make an offer to acquire six of these properties, which have been recently developed, once occupancy achieves acceptable levels which may not coincide with the existing debt maturities. There can be no assurance that we will be able to acquire any of the properties in our pipeline. The following table summarizes the debt maturities or dates by year in which we expect occupancy of our pipeline as of June 30, 2014 to achieve acceptable levels.

        Access Additional Off-Market Acquisition Opportunities.    Our PROs and their "on-the-ground" personnel have established an extensive network of industry relationships and contacts in their respective markets. Through these local connections, our PROs are able to access acquisition opportunities that are not publicly marketed or sold through auctions. Our structure incentivizes our PROs to source acquisitions in their markets and consolidate these properties into our company. Other public self-storage companies generally have acquisition teams located at their central offices, which in many instances are far removed from regional and local markets. We believe our operators' networks and close familiarity with the other operators in their markets provide us clear competitive advantages in identifying and selecting attractive acquisition opportunities. Our PROs have already sourced

 

31 acquisitions since our inception, comprising approximately 2.3 million rentable square feet within our in-place portfolio.

        Recruit New PROs in Target Markets.    We intend to continue to execute on our external growth strategy through additional acquisitions and contributions from future PROs in key markets. With the approximately 50,000 total self-storage properties in the United States owned by over 30,000 operators, we believe there is significant opportunity for growth through consolidation of the highly fragmented composition of the market. We believe that future operators will be attracted to our unique structure, providing them with lower cost of capital, better economies of scale, and greater operational and overhead efficiencies while preserving their existing property management platforms. We intend to add additional PROs to complement our existing geographic footprint and to achieve our goal of creating a highly diversified nationwide portfolio of properties in the top 100 MSAs. Following our inception, we recruited an additional three PROs who managed 112 self-storage properties across six states, 43 of which are part of our in-place portfolio. For example, we recruited Move It, which manages self-storage properties in three states. This PRO manages 11 properties in our in-place portfolio and 21 in our pipeline.

Our Technology and Best Practices

        Our technology and best practices programs, which are overseen by our Technology and Best Practices Group, are designed to take advantage of the scale and sophistication afforded to a large national storage operator while benefiting from the local expertise and relationships of experienced PROs. These programs deliver value for us and our PROs through a number of methods, tools, and platforms: (1) a common data platform for financial, operational, and marketing data collection, reporting, analysis and dissemination, (2) a common online marketing platform to deliver economies of scale for Internet search rankings and customer lead generation, (3) a centralized call center supporting property operations, (4) a joint purchasing program for products such as property insurance, retail merchandise, office supplies, merchant credit and debit card processing, and online auction services in order to achieve economies of scale, and (5) a forum for sharing management techniques and engaging in high-level collaboration across decentralized operations.

        Our unique structure allows for effective best practices collaboration among our experienced PROs. We provide the methods, tools, and platforms for our PROs to share management techniques and resources with each other in order to promote greater experimentation, faster iteration, and a level of flexibility not easily achieved by large competitors operating in a more monolithic fashion. These techniques span the spectrum of property management from employee training, sourcing, and retention to operational audits, selling techniques, data analytics, document digitization, and the pursuit of additional revenue streams such as rooftop solar and cellular antenna contracts. We believe that over time, the open sharing of best practices will deliver consistent, incremental organic improvements and drive better financial results throughout our portfolio.

The Formation and Structure of Our Company

        Upon the completion of this offering and the formation transactions, our in-place portfolio will consist of 235 self-storage properties located in 14 states, comprising approximately 13.2 million rentable square feet. Of these properties, five will be held as long-term leasehold interests with an average remaining lease term, including extension options, ranging from 20 to 61 years.

        Acquisition of In-Place Portfolio.    For our in-place portfolio, pursuant to separate contribution agreements described under "The Formation and Structure of our Company—Contribution Agreements," we have issued or expect to issue prior to or concurrently with the completion of this offering an aggregate of            units of limited partner interest in our operating partnership or in DownREIT partnerships in which our operating partnership owns a significant investment, consisting of            

 

OP units in our operating partnership,            OP units in our DownREIT partnerships,             subordinated performance units in our operating partnership, and             subordinated performance units in our DownREIT partnerships. The properties included in our in-place portfolio by our PROs were contributed pursuant to a policy adopted by our board of trustees that standardizes the methodology that we use for valuing self-storage properties that are contributed to us by our PROs. See "The Formation and Structure of our Company—Valuation Methodology for Contributed Portfolios." In connection with these transactions, we assumed or will assume an aggregate of approximately $         million of mortgage indebtedness. In addition, we have acquired an aggregate of            properties, which were sourced by our PROs, pursuant to purchase and sale agreements with certain third-party owners for a combination of cash and OP units totaling approximately $         million. As of June 30, 2014, our operating partnership had also granted an additional            LTIP units to a third-party consultant and            LTIP units to our PROs under the Prior Incentive Plan. See "Our Management—Prior Incentive Plan."

        Facilities Portfolio and Asset Management Agreements.    Each self-storage property that was contributed to our operating partnership or one of its subsidiaries by a PRO will continue to be managed by the PRO that contributed the property. Each PRO has entered into a facilities portfolio management agreement with us with respect to its contributed portfolio together with asset management agreements for each property. We believe this consistency in post-contribution portfolio and property management, together with our technology and best practices programs, will allow us to fully leverage each PRO's local market knowledge and expertise and mitigate transitional disruptions to operations. These agreements also contain a number of important terms relating to, among other things, exclusivity and non-competition, management and retirement (including the "Key Person Standards" described below under "—Key Person Standards"), and performance. For a further description of the terms of the facilities portfolio and asset management agreements, see "The Formation and Structure of Our Company—Facilities Portfolio and Asset Management Agreements."

        Assignment of PRO Territories.    Pursuant to the facilities portfolio management agreements, within certain MSAs granted to our PROs, our operating partnership has agreed not to acquire additional self-storage properties without first offering the PRO the opportunity to co-invest in, and manage, the property. In the event that a PRO determines not to co-invest and manage a property, we can still acquire and assign management rights to the property.

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SecurCare is assigned 18 exclusive MSAs within Colorado, Georgia, Louisiana, North Carolina, Oklahoma, South Carolina, and Texas and six shared MSAs within California, Georgia and Texas.



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Northwest is assigned five exclusive MSAs within Oregon and one shared MSA in Washington.



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Optivest is assigned two exclusive MSAs within Arizona and New Hampshire and seven shared MSAs within Arizona, California, Nevada, and Texas.



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Guardian is assigned one exclusive MSA within California and three shared MSAs within Arizona and California.



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Move It is assigned four exclusive MSAs within Texas and six shared MSAs within Tennessee and Texas.



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Storage Solutions is assigned two shared MSAs within Arizona and Nevada.

        Each PRO is prohibited from entering into new agreements or arrangements for self-storage properties that they do not currently own or manage without our operating partnership's prior written consent.

 

        Company Lock-out Periods.    We utilize a number of different lock-out periods with respect to our PROs' equity interests in order to maintain their long-term incentive to continue to improve and grow the portfolio of properties that they contributed to us.

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Subordinated Performance Unit Conversion.  PROs are restricted from converting any of their subordinated performance units into OP units for a minimum of two years from the later of the completion of this offering or the initial contribution of their properties to us. Following such two-year period, other than in connection with a retirement event, a PRO may only convert subordinated performance units into OP units upon the achievement of certain performance thresholds and at a specified conversion discount. See "Limited Partnership Agreement of our Operating Partnership—Conversion of Subordinated Performance Units into OP Units."



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Retirement.  PROs are prevented from "retiring" for a minimum of two years from the later of completion of this offering or the initial contribution of their properties to us. Upon certain retirement events, the management of the properties in such PRO's contributed portfolio will be transferred to us (or our designee) in exchange for OP units with a value equal to four times the average of the normalized annual EBITDA from the management contracts related to such PRO's contributed portfolio over the immediately preceding 24-month period. See "Formation and Structure of our Company—Facilities Portfolio and Asset Management Agreements—Management and Retirement."



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Redemption.  Existing holders of OP units in our operating partnership, including our PROs, are restricted from redeeming their OP units for a minimum of one year from the completion of this offering. See "Limited Partnership Agreement of our Operating Partnership—Redemption of OP Units." Existing holders of OP units in our DownREIT partnerships have a longer lock-out period before they can redeem. See "The Formation and Structure of our Company—DownREIT Partnerships."

        Key Person Standards.    Each facilities portfolio management agreement contains provisions, which we refer to as the "Key Person Standards," which relate to each PRO's key persons (as defined in each facilities portfolio management agreement). Our operating partnership, in its sole discretion, may consent to changes in the key persons designated with respect to each PRO from time to time. Pursuant to the facilities portfolio management agreements, each PRO's key persons are required to remain active in and devote a reasonable and prudent portion of each such person's business time to the business and affairs of the PRO with respect to such PRO's contributed portfolio. In addition, other than as a result of death or legal incapacity, at least 50% of the subordinated performance units issued in respect of each PRO's contributed portfolio are required to be beneficially owned by such PRO's key persons and such key persons are required to collectively own at least 50% of the beneficial interest in and control the management company relating to the contributed portfolio. We may elect to terminate our facilities portfolio and asset management agreements and transfer property management responsibilities over the properties managed by a PRO to us (or our designee), if, subject to specified cure provisions, a PRO breaches its Key Person Standards. Upon termination of the facilities portfolio management agreement for a PRO in the case of breach of Key Person Standards, we will be permitted to require that the subordinated performance units issued in respect of such PRO's contributed portfolio be converted into OP units applying a specified conversion penalty on the terms described herein under "Limited Partnership Agreement of our Operating Partnership—Conversion of Subordinated Performance Units into OP Units." See "The Formation and Structure of our Company—Management and Retirement" and "—Performance."

        Registration Rights Agreements.    We have granted registration rights to those persons who will be eligible to receive common shares issuable upon exchange of OP units (or securities exchangeable for OP units) issued in our formation transactions. The registration rights agreement requires that as soon as practicable after the date on which we first become eligible to register the resale of securities of our

 

company pursuant to Form S-3 under the Securities Act, but in no event later than 60 calendar days thereafter, we file a shelf registration statement registering the offer and resale of the common shares issuable upon exchange of OP units (or securities exchangeable for OP units) issued in our formation transactions on a delayed or continuous basis. See "Shares Eligible for Future Sale—Registration Rights Agreement."

Our Structure

        The following diagram illustrates our anticipated structure upon the completion of this offering and the formation transactions:

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(1)

In addition to PROs, various third-party investors who do not manage the properties own OP units and subordinated performance units.

(2)

OP units in our operating partnership are convertible into common shares on a one-for-one basis. Subordinated performance units convert into OP units subject to a specified conversion penalty.

(3)

OP units in our DownREIT partnerships are convertible into OP units in our operating partnership on a one-for-one basis. Subordinated performance units in our DownREIT partnerships convert into subordinated performance units in our operating partnership on a one-for-one basis, which are then convertible into OP units in our operating partnership subject to a specified conversion penalty.

        The diagram above excludes (i) up to             common shares that we may issue and sell upon the exercise of the underwriters' option to purchase additional shares, (ii)              common shares available for future issuance under our 2014 Equity Incentive Plan, as described under "Our Management—2014 Equity Incentive Plan" (iii) OP units issuable upon conversion of outstanding subordinated performance units, and (iv)             OP units issuable upon conversion of            outstanding LTIP units. For a description of the terms related to the conversion of subordinated performance units into OP units, including the application of the conversion penalty, see "Limited Partnership Agreement of our Operating Partnership—Conversion of Subordinated Performance Units into OP Units."

 

        We believe that our structure provides meaningful advantages, including the strong alignment of financial incentives between PROs and shareholders, accelerated acquisition growth opportunities and a disciplined approach to new acquisitions.

Our Properties

        Our PROs have contributed high quality portfolios of self-storage properties that are designed to offer customers convenient, affordable, and secure storage units. Generally, our properties are in highly visible locations clustered in states or markets with strong population and job growth and are specifically designed to accommodate residential and commercial tenants with features such as security systems, electronic gate entry, easy access, climate control, and pest control. Our units typically range from 25 square feet to 300 square feet, and some of our properties also offer outside storage for vehicles, boats, and equipment. We provide 24-hour access to many storage units through computer controlled access systems, as well as alarm and sprinkler systems on many of our individual storage units. Our portfolio upon the completion of this offering and the formation transactions is expected to have more than 100,000 storage units, almost all of which are leased on a month-to-month basis providing us the flexibility to increase rental rates over time as market conditions permit.

        The following map depicts the geographic diversification of our in-place portfolio and pipeline as of June 30, 2014:

 

        The following table summarizes information about our in-place portfolio by state as of June 30, 2014:

        The following table summarizes our pipeline by state as of June 30, 2014:

 

Our Industry and Market Opportunity

        According to the 2014 Self Storage Almanac, the self-storage industry is a large and highly fragmented sector with over $22 billion in estimated annual revenue and over $200 billion in estimated private market value across approximately 52,000 properties operated by over 30,000 operators. Only 25% of the industry consists of operators with more than one property. The 100 largest operators manage less than 18% of these properties; the largest public self-storage companies are Public Storage, Extra Space Storage Inc., Amerco, or U-Haul, CubeSmart, and Sovran Self Storage, Inc., which comprise roughly 10% of the self-storage market share. The larger operators enjoy economies of scale in administration, marketing, and purchasing and often have greater access to capital to fund development and acquisitions. The high level of fragmentation and the opportunity to achieve economies of scale present ample opportunity for growth through consolidation in the industry.

        According to NAREIT, the self-storage sector has been one of the strongest-performing real estate sectors over the past 20 years. The sector's outperformance has been especially strong since the beginning of the recent financial crisis and through the subsequent recovery (January 1, 2008 to December 31, 2013). Throughout this six-year period, the self-storage sector performed better than any other NAREIT equity sub-sector in terms of cumulative total return, average annual total return and volatility of returns. Every year during this period, the cumulative total return in the self-storage NAREIT sub-sector was above 5%. The value of $100 invested in the NAREIT self-storage sub-sector on January 1, 2008 (with annual dividend reinvestment) would have been worth $261 on December 31, 2013, 89% higher than the $138 average of all other NAREIT equity sub-sectors, and 28% higher than the second highest performing NAREIT sub-sector ($204 for manufactured home communities).

        While difficult economic times caused some vacancy, it also created new users by way of downsizing, job loss, and foreclosure, which often necessitate the need for self-storage. The combination of the fluidity in rental rates, the diverse and changing mix of tenants, and operational flexibility enabled operators to actively manage through a tough operating environment. We believe the self-storage sector also typically has a lower expense ratio than do other real estate asset classes, which enabled it to be more resilient to downward pressure on revenue and better able to maintain strong positive cash flow during the downturn. In addition to experiencing smaller declines in cash flow during 2008 and 2009, as the economy began improving in 2010, self-storage property cash flows recovered more quickly than other property types because of the industry's ability to rapidly reset rental rates commensurate with the improving economy. Because self-storage is a short-term operating business, the sector holds an advantage over retail, office, industrial, and virtually all other property types that operate with long-term lease obligations, primarily driven by the ability of operators to adjust rents to market conditions on a daily, weekly, and monthly basis.

Indebtedness Outstanding Upon the Completion of this Offering and the Formation Transactions

        Upon the completion of this offering and the formation transactions, our existing credit facility will automatically convert to a $425 million unsecured credit facility with a syndicate of lenders led by KeyBank National Association, comprised of a revolving line of credit of approximately $             million and a term loan of approximately $             million. At such time, we expect to have the entire term loan amount drawn and approximately $             million drawn on our revolving line of credit. In addition, we expect to have approximately $             million in mortgage debt outstanding upon the completion of this offering and the formation transactions. For further description of our indebtedness, see "Management's Discussion and Analysis of Financial Condition and Results of Operations—Indebtedness Outstanding Upon the Completion of this Offering and the Formation Transactions."

 

Summary Risk Factors

        An investment in our common shares involves various risks. You should carefully consider the risks discussed below and under "Risk Factors" before purchasing our common shares. If any of the following risks or risks discussed under "Risk Factors" occurs, our business, financial condition or results of operations could be materially and adversely affected. In that case, the trading price of our common shares could decline, and you may lose some or all of your investment.

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Adverse economic or other conditions in the markets in which we do business and more broadly could negatively affect our occupancy levels and rental rates and therefore our operating results.



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We may not be successful in identifying and consummating suitable acquisitions, adding suitable new PROs or integrating and operating such acquisitions, including integrating them into our financial and operational reporting infrastructure in a timely manner, which may impede our growth.



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We face competition for tenants and the acquisition of self-storage properties, which may impede our ability to make future acquisitions or may increase the cost of these acquisitions.



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Rental revenues are significantly influenced by demand for self-storage space generally, and a decrease in such demand would likely have a greater adverse effect on our rental revenues than if we owned a more diversified real estate portfolio.



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Increases in taxes and regulatory compliance costs may reduce our income and adversely impact our cash flows.



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Our storage leases are relatively short-term in nature, which exposes us to the risk that we may have to re-lease our units and we may be unable to do so on attractive terms, on a timely basis or at all.



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We face system security risks, as we depend upon automated processes and the Internet.



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We may become subject to litigation or threatened litigation that may divert management's time and attention, require us to pay damages and expenses or restrict the operation of our business.



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The acquisition of new properties that lack operating history with us will make it more difficult to predict our operating results.



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A material weakness has been identified in our internal control over financial reporting. If we fail to implement and maintain effective internal control over financial reporting, investors could lose confidence in our reported financial information, the trading price of our common shares could decline and our access to the capital markets or other financing sources could become limited.



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Our management and PROs have limited experience operating under our company's capital structure, and we may not be able to achieve the desired outcomes that the structure is intended to produce.



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We are restricted in making property sales on account of agreements with our PROs that may require us to keep certain properties that we would otherwise sell.



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Our ability to terminate our facilities portfolio management agreements and asset management agreements with a PRO is limited, which may adversely affect our ability to execute our business plan.



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We may less vigorously pursue enforcement of terms of agreements entered into with our PROs because of conflicts of interest with our PROs.

 

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We own self-storage properties in some of the same geographic regions as our PROs and may compete for tenants with other properties managed by our PROs.



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Our PROs have limited experience with our technology and best practices programs, and such programs may not be able to achieve the desired outcomes they are intended to produce.



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Our management has limited experience operating a REIT and operating a public company and therefore may have difficulty in successfully and profitably operating our business, or complying with regulatory requirements.



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Conflicts of interest could arise with respect to certain transactions between the holders of OP units (including subordinated performance units), on the one hand, and us and our shareholders, on the other.



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The partnership agreement of our operating partnership contains provisions that may delay, defer or prevent a change in control.

Dividend Reinvestment Plan

        In the future, we may adopt a dividend reinvestment plan that will permit shareholders who elect to participate in the plan to have their cash dividends reinvested in additional common shares.

Operating and Regulatory Structure

REIT qualification

        In connection with this offering, we intend to elect to qualify as a REIT under the Internal Revenue Code of 1986, as amended, or the Code, commencing with our short taxable year ending on December 31, 2015. We believe that we have been organized in conformity with the requirements for qualification and taxation as a REIT under the Code, and that our intended manner of operation will enable us to meet the requirements for qualification and taxation as a REIT on an ongoing basis. To qualify, and maintain our qualification, as a REIT, we must meet on a continuing basis, through our organization and actual investment and operating results, various requirements under the Code relating to, among other things, the sources of our gross income, the composition and values of our assets, our distribution levels and the diversity of ownership of our common shares. If we fail to qualify as a REIT in any taxable year and do not qualify for certain statutory relief provisions, we will be subject to U.S. federal income tax at regular corporate rates and may be precluded from qualifying as a REIT for the subsequent four taxable years following the year during which we failed to qualify as a REIT. Even if we qualify for taxation as a REIT, we may be subject to some U.S. federal, state and local taxes on our income or property. Dividends paid by us generally will not be eligible for taxation at the preferential U.S. federal income tax rates that currently apply to certain distributions received by individuals from taxable corporations.

Restrictions on Ownership and Transfer of Our Shares

        To assist us in complying with the limitations on the concentration of ownership of a REIT imposed by the Code, among other purposes, our declaration of trust prohibits, with certain exceptions, any shareholder from beneficially or constructively owning, applying certain attribution rules under the Code, more than 9.8% in value or in number of shares, whichever is more restrictive, of our aggregate outstanding shares of all classes and series, the outstanding shares of any class or series of our preferred shares or our outstanding common shares. Our board of trustees may, in its sole discretion, subject to such conditions as it may determine and the receipt of certain representations and undertakings, waive any or all of these 9.8% ownership limits with respect to a particular shareholder if such waiver will not jeopardize our qualification as a REIT. Our declaration of trust also prohibits any person from, among other things, beneficially or constructively owning shares that would result in our

 

being "closely held" under Section 856(h) of the Code (without regard to whether the ownership interest is held during the last half of a taxable year), or would otherwise cause us to fail to qualify as a REIT.

        Our declaration of trust provides that any ownership or purported transfer of common shares in violation of the foregoing restrictions will result in the shares so owned or transferred being automatically transferred to a charitable trust for the benefit of a charitable beneficiary, and the purported owner or transferee acquiring no rights in such shares. If a transfer of shares would result in our shares being beneficially owned by fewer than 100 persons or the transfer to a charitable trust would be ineffective for any reason to prevent a violation of the other restrictions on ownership and transfer of our shares, the transfer resulting in such violation will be void.

Implications of Being an Emerging Growth Company

        We are an "emerging growth company" as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act, and we are eligible to take advantage of certain specified reduced disclosure and other requirements that are otherwise generally applicable to public companies that are not "emerging growth companies" including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act of 2002, or the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and shareholder approval of any golden parachute payments not previously approved.

        Although we have not made a determination whether to take advantage of any or all of these exemptions, we expect to remain an "emerging growth company" for up to five years, or until the earliest of (1) the last day of the first fiscal year in which our annual gross revenues exceed $1.0 billion, (2) December 31 of the fiscal year that we become a "large accelerated filer" as defined in Rule 12b-2 under the Securities Exchange Act of 1934, as amended, or the Exchange Act, which would occur if the market value of our common shares that is held by non-affiliates exceeds $700.0 million as of the last business day of our most recently completed second fiscal quarter and we have been publicly reporting for at least 12 months or (3) the date on which we have issued more than $1.0 billion in non-convertible debt securities during the preceding three-year period. In addition, we have irrevocably opted out of the extended transition period provided in Section 7(a)(2)(B) of the Securities Act for complying with new or revised accounting standards. As a result, we will comply with new or revised accounting standards on the same time frames as other public companies that are not "emerging growth companies."

 

The Offering

   

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(1)

Excludes (i)                 common shares available for future issuance under our 2014 Equity Incentive Plan, as described under "Our Management—2014 Equity Incentive Plan," (ii)                  common shares issuable upon exchange of                OP units (including                 OP units issuable upon conversion of                outstanding LTIP units), (iii) OP units issuable upon conversion of outstanding subordinated performance units, and (iv)                  OP units held by NSA.

 

Our Corporate Information

        Our principal executive offices are located at 5200 DTC Parkway, Suite 200, Greenwood Village, CO 80111. Our telephone number is (720) 630-2600. Our website is www.nationalstorageaffiliates.com. The information on our website is not intended to form a part of or be incorporated by reference into this prospectus.

 

Summary Pro Forma and Historical Financial and Operating Data

        The following table sets forth our summary pro forma and historical financial and operating data as of and for the periods indicated. You should read the information below in conjunction with the unaudited pro forma condensed consolidated financial statements and the consolidated and combined financial statements and related notes included elsewhere in this prospectus, and the sections entitled "Selected Pro Forma and Historical Financial and Operating Data" and "Management's Discussion and Analysis of Financial Condition and Results of Operations."

        In order to present certain of our summary pro forma and historical financial and operating data in a way that offers investors a period to period comparison, the historical results of operations, cash flows, and certain other information for the year ended December 31, 2013 and the six months ended June 30, 2013 are presented on a basis that combines the results of operations, cash flows, and certain other information of National Storage Affiliates Trust and its consolidated subsidiaries for the nine months ended December 31, 2013 with those of our predecessor for the three months ended March 31, 2013, and for National Storage Affiliates Trust and its consolidated subsidiaries for the three months ended June 30, 2013 with those of our predecessor for the three months ended March 31, 2013. The stand-alone historical financial data used to derive the combined amounts are presented in respective tables under the section entitled "Management's Discussion and Analysis of Financial Condition and Results of Operations." The combination of our historical financial data with the historical financial data of our predecessor does not comply with U.S. GAAP and is not intended to represent what our consolidated results of operations and cash flows would have been if our company had commenced operations as of January 1, 2013. We have not included or excluded revenues or expenses that would have resulted if we had commenced operations on January 1, 2013.

        The historical statements of operations and cash flows data (i) for the six months ended June 30, 2014 has been derived from the historical unaudited consolidated statement of operations and statement of cash flows of our company for such period, and (ii) for the six months ended June 30, 2013 is presented on a combined basis and has been derived by combining the historical unaudited consolidated statement of operations and statement of cash flows of our company for the three months ended June 30, 2013 with the historical audited consolidated and combined statement of operations and statement of cash flows of our predecessor for the three months ended March 31, 2013, in each case included elsewhere in this prospectus. The historical statements of operations and cash flows data (i) for the year ended December 31, 2013 is presented on a combined basis and is derived by combining the historical audited consolidated statement of operations and statement of cash flows of our company for the nine months ended December 31, 2013 with the historical audited consolidated and combined statement of operations and statement of cash flows of our predecessor for the three months ended March 31, 2013, in each case included elsewhere in this prospectus. The historical statements of operations and cash flows data for the year ended December 31, 2012 has been derived from the historical audited consolidated and combined statement of operations and statement of cash flows of our predecessor included elsewhere in this prospectus. The consolidated balance sheet data (i) as of June 30, 2014 has been derived from the historical unaudited consolidated balance sheet of our company as of such date, (ii) as of December 31, 2013 has been derived from the historical audited consolidated balance sheet of our company as of such date, and (iii) as of December 31, 2012 has been derived from the historical audited consolidated and combined balance sheet of our predecessor as of such date, in each case included elsewhere in this prospectus. Our financial statements have been prepared in accordance with GAAP. Dollars in the table below are in thousands, except per share amounts.