Libraries and Archives (U.S.) — NAICS 519210

An investor's primer for public- and private-market audiences.

1. Overview

Libraries and archives collect, organize, preserve, and lend information — books, journals, media, digital content, and historical records — to the public, to students and researchers, and to institutions. In the North American Industry Classification System (NAICS, the U.S. government's standard industry-coding scheme), code 519210 covers establishments "primarily engaged in providing library or archive services," across both physical and electronic collections. [1]

The fact that shapes everything for an investor: this is overwhelmingly a public-sector and nonprofit field, not a commercial one. The organizations that spend the money — public library districts, state and national archives, and the libraries embedded in colleges and public schools — are governments and tax-exempt institutions. They do not seek profit; they run on tax appropriations, institutional budgets, and grants, and they are measured on usage (visits, circulation, programs), not earnings.

That means there is no pure-play listed company that is a library or archive. Investors gain exposure two ways instead:

• Public markets — "picks and shovels." You buy the vendors that sell into library budgets: subscription-database and journal publishers, integrated-library-system (software) providers, and physical records/archive storage firms. Each is a diversified information-services company for which libraries are one revenue stream, not the whole business.
• Private markets and direct lending. The most concentrated library-vendor assets are privately held — private-equity-owned, family-owned, or held inside larger software conglomerates. Separately, fixed-income investors can fund libraries directly by buying the municipal bonds that finance library buildings and library-district operations.

Editorial read: demand for information access is durable, but the economics are budget-constrained. The most investable businesses are suppliers with recurring contracts, proprietary content, mission-critical workflows, and high switching costs — not the institutions themselves.

2. What it is and how it's structured

In scope (NAICS 519210): public and community libraries; academic and research libraries (college and university); school libraries serving kindergarten-through-grade-twelve (K–12) education; special and corporate libraries (law firms, hospitals, museums, companies, government agencies); and archives — collections of documents, photographs, maps, and audiovisual and other material of historical interest, whether physical or electronic. Also included are commercial operators providing digital lending, cataloging, research, and archival services. [1]

Explicitly excluded / adjacent codes (operating a library or archive is 519210; creating, publishing, hosting, or distributing the content usually is not):

• Book, periodical, newspaper, and other publishers — NAICS 5131 — and software publishers — NAICS 513210. This distinction matters: the publishers are a separate industry from the libraries that buy from them, and it is where much of the profit concentrates. [1]
• Web search portals and other information services — NAICS 519290; cloud hosting and data processing — NAICS 518210. [1]
• Stock film/video footage — NAICS 512199 — and stock music — NAICS 512290. [1]
• Commercial physical records storage / information management classifies under records-management codes (e.g., NAICS 561410 / 493190), not 519210 — relevant because the largest publicly traded "archive-adjacent" business, Iron Mountain, lives there.

Ownership mix. By count, the U.S. has roughly 125,000 libraries of all kinds, dominated by school libraries (~98,500) and public libraries (~17,600 outlets), plus ~3,700 academic, ~4,400 special, ~800 government, and ~225 armed-forces libraries. [2] The overwhelming majority are units of government (municipal library districts, public universities, K–12 school systems, federal and state archives) or nonprofits. The genuinely commercial slice — for-profit special/corporate libraries, genealogy and archival-services firms, some private research libraries — is small, and it is essentially the only slice the federal business statistics capture (see Section 3). Our federal source file provides no national ownership split, so no ownership percentage is estimated here.

3. How big it is

Two very different numbers describe this industry, and the gap between them is the single most important thing to understand.

(a) The commercial slice — federal business statistics (our ground truth). The U.S. Census Bureau counts only employer establishments in scope for business surveys — largely for-profit and taxable operations. On that basis NAICS 519210 is small. Payroll and receipts are reported in thousands of dollars.

The concentration ratios (CRn = combined revenue share of the n largest firms) and the low Herfindahl-Hirschman Index (HHI, a 0–10,000 scale where below 1,500 is "unconcentrated") say the commercial slice is fragmented among many small operators. [4] The U.S. Small Business Administration (SBA) treats a library/archive firm as "small" up to $21 million in receipts — so nearly every commercial player qualifies. [5]

Undercount caveat. These figures materially understate the U.S. library and archives economy. County Business Patterns (CBP) excludes public administration, most government employees, and the self-employed; the Economic Census excludes government-operated establishments and focuses on paid-employee businesses. Public libraries are specifically identified as an excluded governmental activity. [3][4] Our federal file also contains no industry growth rate, profit margin, capital expenditure, or total public-budget figure — those metrics are not reported and are not invented here.

(b) The real economic footprint — a large government/nonprofit base. Add government and nonprofit institutions (drawn from other national surveys, not our Census business file) and the picture is an order of magnitude larger:

• Public libraries: ~9,000 library systems operating ~17,000+ outlets, drawing more than 800 million visits and 155 million-plus registered users in fiscal 2023, offering ~4.6 million programs to ~93 million attendees. [6] The last comprehensively reported national total was about $14.2 billion in operating revenue (fiscal 2019), roughly 86% of it from local government — chiefly property taxes; totals have grown since. [7]
• Academic libraries: roughly 3,650 libraries with ~$8.3 billion in total operating expenditures, including ~$3.5 billion in salaries (2020–21). [8] Subscriptions to journals and databases alone consume ~35% of a typical academic library's budget. [9]
• School libraries: ~98,500 facilities, but staffing is eroding — school-librarian full-time equivalents (FTEs) fell about 25%, from ~52,500 (2009–10) to ~39,300 (2022–23), and over a third of school districts now report no librarian. [10]
• Federal: the National Archives and Records Administration (NARA) runs on roughly $443 million a year (fiscal 2024) — a budget critics note has been roughly flat in real terms for decades — and the Library of Congress received about $591 million (fiscal 2024). [11][12]

So the ~$2.70 billion "commercial" receipts figure is real but describes only a sliver. Public + academic institutional spend alone is on the order of $22–23 billion a year, before school, special, and federal libraries — and that money flows outward to the publishers, software vendors, and content platforms that are investable.

4. The investable universe

No listed company is a library or an archive. Exposure comes from suppliers to libraries and from the adjacent records-storage business. Each is a diversified firm for which libraries are one segment, so the scale figures below describe the whole company, not a library-only line.

A very diluted listed route to the private leaders also exists: KKR & Co. (NYSE: KKR) owns OverDrive, and Constellation (above) owns SirsiDynix — but libraries are a rounding error in each parent.

Major private / non-corporate owners (where much of the pure library-vendor value actually sits):

• OverDrive (the Libby app) — the dominant library e-book/e-audiobook lending platform, serving 43,000+ libraries with an estimated ~90% share; owned by private-equity firm KKR since 2020. [15]
• EBSCO Information Services — subscription databases, e-journal management, and discovery; part of privately held, family-owned EBSCO Industries.
• Follett School Solutions — maker of the Destiny K–12 library-management system; acquired by private-equity firm Francisco Partners in 2021. [24] (Book/materials distributor Baker & Taylor is separately, privately held.)
• Midwest Tape / Hoopla — leading cost-per-checkout digital lending platform; privately held.
• Axiell — privately owned software for libraries, archives, museums, and cultural collections. [27]
• Cengage Group / Gale — privately held education-and-information provider serving academic, public, K–12, and special libraries.
• OCLC and Equinox — member-owned nonprofits (WorldCat; open-source support); by structure they cannot be sold. [13]
• Open-source library systems (Koha, FOLIO) — no owner; a growing competitive counterweight to the paid vendors. [13]

Direct public-market route to the institutions themselves: municipal general-obligation (GO) bonds and library-district bonds — how U.S. voters and municipalities finance library construction and, in independent library districts, operations. This is the one way a public-market (fixed-income) investor lends straight to a library; the analysis is of the issuing government's credit quality and pledged revenues, not an operating margin.

5. How the money works

Because the industry is mostly non-commercial, "how the money works" splits into two very different economic engines.

The institutions (most of the industry): budgets, not profits. A public library is funded, not sold. Its "revenue" is a tax appropriation — ~86% local (mostly property taxes), with smaller state aid, federal grants, fines/fees (many systems have gone fine-free), donations from Friends-of-the-Library groups, and, for academic libraries, university allocations and endowments. [7] Costs run the other way: roughly two-thirds of spending is staff/salaries, then collections and materials, then facilities and technology. [7] The relevant "unit economics" are cost-per-use metrics — expenditure per capita, cost per visit, cost per circulation — plus circulation, program attendance, and registration, which libraries use to justify the next budget cycle. There is no margin; the "return" is public value delivered per tax dollar.

The vendors (where the profit is): recurring licensing. Investors make money on the sell-side into those budgets, and the economics are attractive:

• Subscriptions / SaaS. Databases, journals, and integrated library systems are sold as multi-year recurring subscriptions with high renewal — switching costs are steep because migrating a catalog is painful. This produces sticky annual recurring revenue (ARR) and strong margins. Serials and database prices have historically risen faster than library budgets, steadily transferring purchasing power from libraries to publishers. Research publishers increasingly bundle reading access with open-access publishing fees (see Section 6).
• Per-title e-book / audiobook licensing. Unlike a physical book (which a library owns under copyright's first-sale doctrine), a digital title is licensed, not sold — and the license expires. The three dominant models: one-copy/one-user (~$30–$85 per title, one borrower at a time); metered access (the license dies after a set number of loans — famously HarperCollins's 26-checkout cap — or after ~24 months); and cost-per-circulation (the Hoopla model — the library pays each time a title is borrowed). [16][17] These recurring, expiring licenses are high-margin for publishers and platforms and a permanent cost escalator for libraries.
• Physical archiving (Iron Mountain-style). Storage revenue is recurring and durable — customers rarely move records once boxed — producing bond-like cash flows and healthy EBITDA (earnings before interest, taxes, depreciation, and amortization). [14]

For a vendor investor, the metrics that matter are ARR and annual contract value (ACV), renewal/churn rates, gross margin and free cash flow, recurring-versus-project revenue mix, content-rights and royalty costs, customer concentration, and leverage. The tension between the two engines — flat/contested public budgets on one side, escalating licensing costs on the other — is the defining economic dynamic of the industry.

6. What drives demand

• Local government fiscal health. Property-tax bases and municipal budgets set ~86% of public-library revenue; recessions, tax caps, and ballot measures move the whole industry. [7]
• Population, education, and literacy. More residents, students, and enrollment mean more visits, circulation, and academic-library spend. [6][8]
• The digital shift. E-book and e-audiobook borrowing is the fast-growing segment (electronic circulation reached ~1.68 items per person in 2023, alongside 4.37 physical items), pulling budgets toward licensing. [6] In the Public Library Association (PLA) technology survey, 95.3% of public libraries offered e-books or e-audiobooks and 95.3% offered digital-literacy training — but 85.7% named subscription costs and license terms as the leading constraint on digital-content availability. [20]
• Research intensity and open access (OA). Universities, hospitals, corporations, and agencies need peer-reviewed research, databases, and archival material; academic-library budgets track university finances and research output, with subscription costs the swing factor. The shift to OA publishing is reshaping how institutions combine reading access with publishing access. [9][25]
• Community-services role. Libraries increasingly deliver workforce help, digital-literacy training, broadband access, and social services — expanding programming demand (93 million program attendees in 2023). [6]
• Preservation and digitization. Aging physical formats, born-digital records, disaster recovery, and demand for remote access sustain long-term digitization and archival-management spending. [1]
• Trusted information and AI. Generative artificial intelligence (AI) raises demand for authoritative, well-described, rights-cleared collections and metadata — while also threatening to substitute for reference and discovery, and raising copyright disputes. [13]
• Public sentiment and turnout. Library bond and levy measures at the ballot box, and the politics of book access, directly gate funding.

7. Regulation

Libraries are not economically regulated like utilities; the "regulation" that matters is funding policy, copyright, connectivity, and access rules.

• Federal funding levers — IMLS and LSTA. The Institute of Museum and Library Services (IMLS) administers the Library Services and Technology Act (LSTA), the only federal program funding libraries exclusively; its Grants to States distribute ~$160–180 million a year by population formula. [18] That is small relative to the ~$14 billion public-library base but disproportionately funds statewide databases, broadband, and rural service. In March 2025 an executive order sought to dismantle IMLS; federal courts issued injunctions, a binding settlement (April 2026) kept the agency intact, and grants were reinstated — but the administration's proposed fiscal-2027 budget again seeks to eliminate it. [19] This is now a live, recurring political risk rather than a settled backstop.
• Copyright — first sale and Section 108. The first-sale doctrine lets a library lend a physical book it owns; it does not apply to licensed digital content, which is the legal root of the e-book pricing fight. Separately, Section 108 of the Copyright Act permits libraries and archives to reproduce and distribute limited copies for preservation, replacement, and research under specified conditions — but it does not override contract terms, so digital lending still depends on licenses. [21] State attempts to force publishers to license e-books to libraries on set terms (e.g., Maryland's 2021 law) were struck down on federal-preemption grounds in 2022. [16][17]
• Connectivity — E-Rate and CIPA. The Federal Communications Commission's (FCC) Schools and Libraries Universal Service Support Program, commonly called E-Rate (part of the Universal Service Fund), subsidizes broadband and telecommunications for libraries and schools; it is a connectivity subsidy, not a content-purchasing budget. [23] The Children's Internet Protection Act (CIPA) conditions certain federal funds on internet content filtering.
• Accessibility. The Americans with Disabilities Act (ADA) covers state and local government services, including public libraries. A 2024 Department of Justice (DOJ) rule sets technical standards for the accessibility of web content and mobile apps provided by state and local governments — pushing vendors to deliver accessible interfaces, documents, search tools, and apps. [22]
• Records law (archives). The Federal Records Act and state analogues govern retention and access — the demand engine for NARA and for commercial records managers.
• Procurement, privacy, and intellectual freedom. State/local procurement rules, public-records laws, and patron-confidentiality requirements shape contracts jurisdiction by jurisdiction. A wave of state-level book-restriction and library-governance laws since 2022 affects collections, staffing, and, at the margin, funding.

8. Competitive dynamics and consolidation

On the institutional side there is little "competition" in the commercial sense. Libraries compete for public funding and mindshare against free alternatives (Google, Amazon, streaming services, and increasingly AI chatbots), not against each other for profit. Local operations are further insulated by geographic service areas. The federal concentration data (CR4 27.9%, CR50 58.0%, HHI 254.8) describe the captured commercial universe — not government libraries or the far more concentrated markets for library software and digital lending. [4]

On the vendor side, consolidation is intense and is the key structural story:

• Content and systems have concentrated. Clarivate's $5.3 billion purchase of ProQuest (2021) folded Ex Libris and Innovative under one roof; Ex Libris holds ~49% of the academic library-system market and ~69% among the largest research libraries. Constellation Software acquired SirsiDynix (2024), and Francisco Partners acquired Follett School Solutions (2021). OverDrive's ~90% grip on library digital lending is a near-monopoly. [13][15][24]
• This raises libraries' input costs. Fewer suppliers, expiring e-book licenses, and above-inflation serials pricing steadily squeeze library purchasing power — the flip side of what makes these vendors attractive investments.
• Open source and cooperatives are the counterweight. Koha and FOLIO (library systems) and member-owned nonprofits (OCLC, Equinox) give libraries a non-commercial escape valve and cap how far vendors can push pricing. [13]

Competitive moats differ by layer: library-management and discovery software are defended by workflow integration, data-migration cost, staff familiarity, and long contract cycles; digital lending by publisher relationships and catalog breadth; scholarly publishing by brand, editorial networks, and back-file archives.

9. Risks

• Political and funding risk. The IMLS episode shows federal support can be threatened by executive action; local levies can fail; and book-access politics can destabilize budgets and governance. [19]
• Licensing-cost inflation. Expiring digital licenses and rising serials prices erode what fixed library budgets can buy — a squeeze on institutions and a tailwind for vendors. [16][17][20]
• Vendor concentration / monopoly pricing. Heavy consolidation (Clarivate, OverDrive) concentrates pricing power and single-vendor dependency. [13][15]
• Copyright and AI disputes. Litigation over digitization, controlled digital lending, text-and-data mining, and AI training is unsettled and can reshape both library practice and publisher revenue.
• Digital substitution. Google, Amazon, Wikipedia, and generative AI substitute for reference and discovery, pressuring institutional relevance and database/publisher demand.
• Municipal fiscal stress. Reliance on property taxes ties public libraries to local real-estate cycles and tax-cap politics. [7]
• Cybersecurity and continuity. Outages, breaches, privacy failures, and loss of archival integrity are operational and reputational risks for platforms and institutions alike.
• Staffing erosion. The ~25% decline in school-librarian FTEs shows how quickly this labor-intensive service is cut when budgets tighten. [10]
• For the investable vendors specifically: exposure to strained public budgets, academic "big deal" journal cancellations, the open-access movement pressuring subscription revenue, lumpy government/university procurement, and private-equity leverage that can degrade service quality.
• Measurement risk. Federal business statistics materially understate government-operated and nonprofit activity; do not size the industry from the ~$2.70 billion receipts figure alone. [3][4]

10. How to invest and the outlook

Public-market routes:

• Vendor equities ("picks and shovels") — RELX, Clarivate (CLVT), Thomson Reuters (TRI), Wiley (WLY), Springer Nature (SPG), and Iron Mountain (IRM) give indirect exposure, but in every case libraries are a fraction of a diversified information-services or storage business. Treat them as partial-exposure watchlist names, not measures of NAICS 519210: read segment disclosures for library/academic/research/digital-content exposure, and assess renewal rates, pricing, customer concentration, debt, and cash generation. Share-price valuation, dividend yield, and multiples belong at the company level — never benchmarked against the federal NAICS receipts figure. [13][14]
• Municipal bonds — library-district and municipal GO bonds are the only way to lend directly to the institutions; a fixed-income, tax-exempt route tied to local credit quality rather than to any operating margin.

Private-market routes:

• The concentrated pure-plays are private-equity- and family-owned — OverDrive (KKR), EBSCO, Follett (Francisco Partners), Axiell, Midwest Tape — so direct participation runs through private equity (PE), growth equity, venture capital, private credit, or secondary stakes rather than public shares. [15][24] Underwriting should focus on contract durability, renewal behavior, rights ownership, interoperability, implementation risk, government exposure, gross margins, free cash flow, and leverage.

Outlook. Demand for library services looks structurally resilient — record visits, growing digital circulation, and expanding community-services roles — and the courts' reversal of the 2025 IMLS shutdown removed a near-term federal-funding tail risk, though the fiscal-2027 elimination proposal keeps it alive. [6][19] The durable pressures are the licensing-cost squeeze and vendor concentration, which favor the suppliers over the institutions and make the sell-side the more investable position. Generative AI cuts both ways: a substitution threat to reference and discovery, but also a product opportunity for the database and discovery vendors that own the underlying content. Net: a stable, slow-growth, publicly funded field whose profits accrue mainly to a handful of concentrated, largely private suppliers rather than to the libraries themselves. The strongest opportunities combine recurring institutional revenue, defensible content or data rights, low churn, and workflows that are costly to replace.

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Sources

1. U.S. Census Bureau, 2022 NAICS Manual — NAICS 519210 definition and adjacent-industry cross-references, 2022. https://www.census.gov/naics/reference_files_tools/2022_NAICS_Manual.pdf
2. American Library Association, "Number of Libraries in the United States" (Library Statistics and Figures), 2023. https://libguides.ala.org/c.php?g=751692&p=9132142
3. U.S. Census Bureau, County Business Patterns 2023 (NAICS 519210; via Histometrics ingested federal statistics). https://www.census.gov/programs-surveys/cbp.html
4. U.S. Census Bureau, Economic Census 2022 — Concentration of Largest Firms (NAICS 519210; via Histometrics ingested federal statistics). https://www.census.gov/programs-surveys/economic-census.html
5. U.S. Small Business Administration, Table of Small Business Size Standards (NAICS 519210), 2023. https://www.sba.gov/document/support-table-size-standards
6. Institute of Museum and Library Services, "Increased Public Library Usage Shown by IMLS Survey Data" (Public Libraries Survey, FY2023), 2025. https://www.imls.gov/research-evaluation/surveys/public-libraries-survey-pls
7. American Academy of Arts & Sciences, Humanities Indicators, "Public Library Revenue, Expenditures, and Funding Sources" (IMLS Public Libraries Survey data), 2021. https://www.amacad.org/humanities-indicators/public-life/public-library-revenue-expenditures-and-funding-sources
8. National Center for Education Statistics, Digest of Education Statistics, Table 701.40, "Collections, staff, and operating expenditures of degree-granting postsecondary institution libraries," 2022. https://nces.ed.gov/programs/digest/d22/tables/dt22_701.40.asp
9. Association of College & Research Libraries / American Library Association, "The State of U.S. Academic Libraries: Findings from the ACRL 2023 Annual Survey," 2024. https://www.ala.org/news/2024/10/state-us-academic-libraries-findings-acrl-2023-annual-survey
10. Education Week, "What the Numbers Say About the Drop in School Librarians" (SLIDE / Antioch University data), 2023. https://www.edweek.org/teaching-learning/districts-lost-school-librarians-over-the-pandemic/2023/04
11. National Coalition for History, "NCH Submits Testimony … on FY24 Budget for the National Archives" (NARA operating budget), 2023. https://historycoalition.org/2023/04/18/nch-submits-testimony-to-senate-appropriations-committee-on-fy-24-budget-for-the-national-archives/
12. U.S. Senate Committee on Appropriations, "Bill Summary: Legislative Branch Fiscal Year 2024 Appropriations Bill" (Library of Congress), 2024. https://www.appropriations.senate.gov/imo/media/doc/fy24_leg_branch_bill_summary.pdf
13. Marshall Breeding / American Libraries Magazine, "2024 Library Systems Report" (Clarivate–ProQuest, Ex Libris market share, SirsiDynix, OCLC, open source), 2024. https://americanlibrariesmagazine.org/2024/05/01/2024-library-systems-report/
14. Iron Mountain Inc., FY2024 results (via SEC filings and earnings coverage), 2024–2025. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001020569&type=10-K
15. Marshall Breeding, Library Technology Guides, "OverDrive" vendor profile and "OverDrive to Change Ownership" (KKR acquisition; ~90% share; 43,000+ libraries), 2020. https://librarytechnology.org/vendor/overdrive
16. Library Journal, "HarperCollins Puts 26 Loan Cap on Ebook Circulations" (library e-book licensing models), 2011. https://www.libraryjournal.com/story/harpercollins-puts-26-loan-cap-on-ebook-circulations
17. The Authors Guild, "E-book Library Pricing: The Game Changes Again" (one-copy/one-user, metered, cost-per-circulation; state-law preemption), 2019. https://authorsguild.org/blog/e-book-library-pricing-the-game-changes-again/
18. Institute of Museum and Library Services, "Grants to States Overview" (LSTA formula funding), 2024. https://www.imls.gov/grants/grants-state
19. American Library Association, "Court permanently blocks Trump's executive order to dismantle federal agency for America's libraries" and "FAQ: Executive Order Targeting IMLS," 2025–2026. https://www.ala.org/news/2025/11/court-permanently-blocks-trumps-executive-order-dismantle-federal-agency-americas
20. Public Library Association, 2024 Public Library Technology Survey Report, 2024. https://www.ala.org/sites/default/files/2024-07/PLA_Tech_Survey_Report_2024.pdf
21. U.S. House Office of the Law Revision Counsel, 17 U.S.C. §108: Limitations on Exclusive Rights — Reproduction by Libraries and Archives, 2026. https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title17-section108
22. U.S. Department of Justice, ADA.gov, "Fact Sheet: New Rule on the Accessibility of Web Content and Mobile Apps Provided by State and Local Governments," 2024. https://www.ada.gov/resources/2024-03-08-web-rule/
23. Universal Service Administrative Company, "E-Rate" (Schools and Libraries Universal Service Support Program), 2026. https://www.usac.org/e-rate/
24. Follett, "Francisco Partners Acquires Follett School Solutions," 2021. https://www.follettlearning.com/press-release/francisco-partners-acquires-follett-school-solutions/
25. Springer Nature, Annual Report / Investor Relations (Frankfurt Stock Exchange listing), 2025–2026. https://ir.springernature.com/
26. U.S. Securities and Exchange Commission, John Wiley & Sons, Inc., Annual Report (Form 10-K) for fiscal 2025. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000107140&type=10-K
27. Axiell, "Axiell Announces Changes to Board of Directors" (ownership disclosure), 2024. https://www.axiell.com/blog-post/axiell-announces-changes-to-board-of-directors/