Depository Credit Intermediation (U.S., NAICS 5221)

A Histometrics rollup primer for public- and private-market investors. NAICS (North American Industry Classification System) 2022 code 5221 is an industry group — a four-digit code — that gathers the three kinds of institution that take deposits and lend them back out. This page synthesizes across its three children; it does not repeat the leaf detail. Scope: United States, current through mid-2026. Figures are cited facts; statements about the future are labeled "judgment."

1. Overview

NAICS 5221 is, in plain terms, the deposit-taking part of American finance — every institution whose core business is holding your money as a deposit or share and lending it out at a higher rate. The gap between what these institutions pay for funding and what they earn on loans and securities, net of credit losses and operating costs, is where nearly all the profit lives. This is the plumbing that clears paychecks, holds checking accounts, and writes the mortgages, auto loans, and business credit lines the real economy runs on.

The group sits inside subsector 522 (Credit Intermediation and Related Activities), which in turn sits inside sector 52 (Finance and Insurance). What makes 5221 a natural unit is a single shared feature: these are depositories — they fund themselves largely with insured deposits, which is exactly what separates them from the non-depository lenders next door in NAICS 5222 (credit-card banks, consumer-finance companies, mortgage lenders that borrow rather than take deposits). Everything in 5221 is deposit-funded; nothing outside it is.

The distinctive thing about this level is not any one child but the contrast among the three. They do the same economic job through radically different ownership structures — one is a deep public-equity market, one has no stock at all, and one is a slow-motion liquidation that keeps minting takeover targets. Section 2 leads with that comparison; the rest of the page treats the group as a whole.

2. What's inside — the three children and how they differ

NAICS 5221 contains exactly three detailed industries. Each is a single-child five-digit code, so each equals its own six-digit leaf. Together they cover the entire U.S. depository system:

How to read the two share columns. Receipts and assets tell different stories on purpose. On receipts (gross interest + fee income) commercial banking is ~82% of the group; on assets (the balance sheet, which is how you actually size a lender) it is ~88%. Credit unions punch slightly above their receipts weight on some human measures — they employ ~17% of the group's workers and serve about 145 million members [4] — but hold only ~8% of the assets, because a not-for-profit cooperative runs a thinner spread and returns surplus to members rather than booking it as revenue. Savings institutions are the smallest slice on every measure and getting smaller.

The three ownership models are the whole point. A general investor should internalize this before anything else:

• Commercial banking is where public-market value concentrates. The listed universe runs from the four "universal" banks down through dozens of regionals — but by count, most of the roughly 3,900 U.S. commercial banks are small, private community banks [7].
• Credit unions cannot be bought. There is no stock, no ticker, no private-equity stake in the institution itself. You reach the sector only sideways — through the technology and payments vendors they buy from, or their debt and loan pools. This is the single most important fact at the child level, and it survives the rollup unchanged [4].
• Savings institutions are a hybrid: a handful of listed thrift holding companies, a long tail of depositor-owned mutuals (no stock until they convert), and a growing "other depository" flank of industrial banks owned by fintech, auto, and commercial parents [5][8].

The distinctions that split investors — federal vs. state charter, single-bond vs. community membership, mutual vs. stock form — all live inside the children and are treated in the leaf primers, not here.

3. Size — this level's rollup figures

These are our ingested federal ground-truth figures for NAICS 5221 specifically. The children sum to the group almost exactly, which is worth showing because it confirms the rollup:

The measurement caveat — anchor on assets, not "receipts." For depositories the Census "receipts" line is an income figure (roughly interest income plus fees), not a size-of-business figure. A lender's economic weight sits on its balance sheet. Adding the three regulators' asset tallies — about $25.3 trillion at commercial banks (FDIC), $2.43 trillion at credit unions (NCUA), and $1.07 trillion at savings institutions (FDIC) — the depository system holds roughly $29 trillion in total assets [3][4][5], about 40 times the $723 billion receipts number. Both figures are true; they measure different things. When you size any part of 5221, use assets, deposits, and net interest income — never receipts.

Undercount and mismatch caveats. Three gaps matter. First, a Census "establishment" is a location, not a chartered institution, so the ~108,800 establishments span far fewer companies — roughly 3,900 commercial banks, ~4,250 credit unions, and ~521 savings institutions [3][4][5], each running many branches. Second, the employer-based County Business Patterns frame misses the smallest, volunteer-run credit unions, which have no paid payroll, so the firm count understates that child's true institution count — the one place in this group where small, member-run ownership causes a genuine undercount. Third, the firm counts do not sum perfectly (~9,103 vs. 9,076) because a firm can span more than one code and the concentration tables count firms per code and vintage; treat the group figure as authoritative.

Concentration — unconcentrated, and more so than any child. For the group, the top 4 firms earned 20.9% of receipts, the top 8 29.6%, the top 20 42%, and the top 50 55.4%, with a Herfindahl-Hirschman Index (HHI, a standard concentration score where anything under 1,500 is "unconcentrated") of just 164 [2]. That 164 is lower than any individual child's HHI — pooling three fragmented industries with different leaders produces an even more dispersed whole. Two familiar warnings apply: this is a national receipts view, whereas bank competition is regulated at the local market level and looks far tighter there; and measured by assets rather than receipts, the four largest banking companies control a much larger share of the system than the 20.9% CR4 suggests [3].

4. Investable universe — where value concentrates

Across the whole group, investable public value is overwhelmingly a commercial-banking story, because that is the only child with a deep listed-equity market:

• Commercial banking offers one of the deepest opportunity sets of any U.S. industry: the "universal" banks — JPMorgan Chase (JPM), Bank of America (BAC), Wells Fargo (WFC), Citigroup (C) — then super-regionals such as U.S. Bancorp (USB), PNC Financial (PNC), and Truist (TFC), then dozens of listed regionals. Remember you are buying a holding company, which owns the commercial bank plus card, securities, and wealth arms — not the 522110 slice alone [1-child].
• Credit unions contribute no listed equity. The largest are enormous but member-owned — Navy Federal alone (~$197 billion in assets, ~15 million members) is bigger than the next four combined — and you cannot buy any of them [4]. The public proxy is the vendor ecosystem: core processors Fiserv (FI), FIS (FIS), Jack Henry (JKHY); digital-banking and lending specialists Alkami (ALKT), Q2 Holdings (QTWO), MeridianLink (MLNK), nCino (NCNO); and network Visa (V) — each of which also serves banks, so exposure is partial [12].
• Savings institutions offer a thin and thinning pool of listed thrift holding companies. There is no pure "thrift" ETF anymore — the sector shrank too far. Value clusters in a few larger holding companies, a long tail of small mutuals, and the growing industrial-bank flank [5].

The practical map: value concentrates at the top of the commercial-banking size ladder, is reachable only through picks-and-shovels for credit unions, and hides in special situations (conversions, takeouts) among the thrifts. Named rosters and sizes live in the three leaf primers.

5. How the money works

Every institution in 5221 runs the same core engine and then diverges on structure:

Interest earned on loans and securities − interest paid on deposits and borrowings = net interest income.

Expressed against average earning assets, that spread is the net interest margin (NIM) — the master metric for the entire group. The industry converged near similar spreads in the latest data: commercial banks earned a NIM of 3.39% in Q4 2025 [3], credit unions about 3.44% in early 2026 [4], and the broad FDIC-insured system 3.31% in Q1 2026 [3]. On top of NIM sit the same supporting metrics everywhere — credit costs (provisions and net charge-offs, low across the group but the swing factor in a downturn), capital, and return on assets/equity, where roughly 10x leverage turns a ~1% return on assets into a double-digit return on equity.

The three children optimize that engine differently:

• Commercial banks layer large fee (non-interest) income — cards, wealth management, treasury services — on top of the spread, which diversifies them away from pure rate risk. They are valued on earnings and on price-to-book. The group's banks earned about $295.6 billion of net income in 2025 [3].
• Credit unions pay no federal income tax and answer to members, not shareholders, so they can run a thinner margin and still be sound, plowing surplus into cheaper loans and better savings rates. There is no earnings per share or dividend yield; a member's "return" is priced into the product [4].
• Savings institutions tilt their book toward residential mortgages, which are long-dated and lower-yielding, so their NIM is structurally thinner and their signature valuation gauge is price-to-tangible-book value — newly converted thrifts often trade below book because they raised more capital than they can quickly deploy [5].

6. Demand drivers

Because all three children do spread lending, the same macro forces move the whole group:

• Interest rates and the yield curve — the biggest lever. The Federal Reserve cut three times in late 2025 to a roughly 3.50%–3.75% federal funds rate [12]; a steeper curve widens the borrow-short/lend-long spread, a flat or inverted one squeezes it.
• Loan demand and the credit cycle — commercial-bank loans grew ~5.9% and credit-union loans ~4.6% in 2025 [3][4].
• Deposit and membership growth — cheap, sticky funding is the raw material; credit unions added ~2.4 million members in 2025 [4].
• Economic growth, employment, and housing — depositories are a geared play on GDP, and the housing/mortgage cycle drives the thrift book especially.
• "Flight to structure" during scares — banking stress can push savers toward member-owned credit unions or insured deposits, redistributing flows within the group.

7. Regulation

Depository banking is among the most heavily supervised activities in the country, and the group is split across parallel regulators by charter type — which is itself an investment consideration:

• Commercial banks and savings institutions run through the bank regulators: the Office of the Comptroller of the Currency (OCC) charters national banks and federal thrifts; the Federal Reserve supervises holding companies and sets monetary policy; the FDIC insures deposits up to $250,000 per depositor, per bank, per ownership category, and resolves failures; state regulators oversee state charters; and the Consumer Financial Protection Bureau (CFPB) covers consumer-lending compliance above $10 billion in assets [3][5].
• Credit unions answer instead to the National Credit Union Administration (NCUA), which charters, examines, and insures them through the National Credit Union Share Insurance Fund (NCUSIF) — the cooperative analogue to the FDIC, also $250,000, also full-faith-and-credit backed [4].

Two charter-specific rules shape value. The Qualified Thrift Lender (QTL) test forces a savings institution to keep at least 65% of assets in residential-mortgage-related investments to keep its charter and Federal Home Loan Bank access [5]. And the credit-union federal income-tax exemption — the sector pays none because it is not-for-profit — is the industry's defining advantage and its recurring political flashpoint [4]. Group-wide frameworks include Dodd-Frank, Basel III capital and liquidity standards, the Bank Secrecy Act / anti-money-laundering regime, and the Community Reinvestment Act. The unfinished "Basel III endgame" capital rules were re-proposed in March 2026 in a lighter form than the 2023 version [11]. On the fringe, the industrial-bank ("ILC") loophole — ILCs are FDIC-insured but their parents escape consolidated Fed supervision — drew a formal FDIC Request for Information in July 2025 [8].

8. Consolidation

The defining structural fact for the whole group is that the number of institutions falls every year while assets rise — but the mechanism differs by child, and that contrast is where the opportunities are:

• Commercial banks merge to spread rising technology and compliance costs: the count fell from over 8,000 around 2000 to roughly 3,900 today [7]. The marquee 2025 deal was Capital One's ~$35 billion acquisition of Discover, completed in May 2025 [8].
• Credit unions consolidate their own count (from ~4,455 to ~4,250 federally insured during 2025) — but the striking trend is credit unions buying banks: cash-rich, tax-advantaged cooperatives became aggressive acquirers of small community banks, hitting a record 22 announced deals in 2024 [4]. Their two historic lobbies merged into America's Credit Unions on January 1, 2024.
• Savings institutions are in outright secular decline — from ~4,000 thrifts in 1980 to ~521 at year-end 2025 [3][5] — bleeding both to takeovers and to charter conversion (a thrift that re-charters as a commercial bank migrates its activity into 52211, so the code shrinks even when the business does not). Fresh mutual-to-stock conversions keep adding over-capitalized companies that become natural targets.

Net: fewer, larger survivors across all three, with credit unions the acquirers, thrifts the sellers, and commercial banks doing both.

9. Risks

The hazards are shared across the group, with a different sharpest edge for each child:

• Interest-rate / duration risk — the "borrow short, lend long" mismatch that sank Silicon Valley Bank in 2023; commercial banks still carried ~$306 billion of unrealized securities losses at end-2025 [3], and thrifts are the most duration-exposed by charter [5].
• Deposit runs — now measured in hours, not days, given digital banking; a group-wide fragility since 2023.
• Credit risk, especially commercial real estate — concentrated in mid-sized regionals and property-heavy thrifts; harder for a credit union to absorb because it can only rebuild capital from retained earnings [4][5].
• Operational, cyber, and vendor-concentration risk — sharpest for credit unions and small thrifts that lean on a few core processors.
• Policy risk — a serious move against the credit-union tax exemption would reprice that child overnight; a heavier Basel endgame would raise capital costs for large banks [4][11].
• Structural decline and measurement risk — for savings institutions the exit is often a sale, capping standalone upside; and NAICS codes map poorly onto bank parents and charters, so a code-based screen both misses and mixes businesses [5].

Private-market investors face the added burdens of illiquidity, limited disclosure, and the need for regulatory approval to buy or sell a controlling stake.

10. How to invest, and the outlook

The route depends entirely on which child you want. There is no single "buy 5221" trade:

• Commercial banking (deepest, most direct): individual bank stocks (megabanks for scale and diversified fees, regionals for more leverage to the local credit cycle), bank preferred stock and subordinated debt for income, and ETFs (exchange-traded funds — baskets that trade like one share) such as the Invesco KBW Bank ETF (KBWB) and SPDR S&P Regional Banking ETF (KRE) [11]. Private routes: community-bank equity and bank acquisitions.
• Credit unions (indirect only): own the picks-and-shovels — vendor stocks (FI, FIS, JKHY, ALKT, QTWO, MLNK, NCNO, V) as the cleanest public proxy; community-bank stocks as the mirror trade (credit-union acquisitions support takeover premiums); and fixed-income routes — large-CU subordinated debt and consumer-loan securitizations (asset-backed securities). Deposits are a product, not an investment [4][12].
• Savings institutions (special situations): individual thrift holding-company stocks and the signature thrift-conversion trade — a recently converted, over-capitalized thrift trading below tangible book, or a mutual positioned for a future "second-step" sale. A direct route is depositor subscription rights: become a depositor of a mutual thrift before it converts and you earn the right to buy stock at the IPO [5].

Outlook (judgment). Entering 2026 the group is broadly constructive but uneven. Commercial banks carry margins near multi-year highs, still-strong credit quality, and a softer capital re-proposal that could fund bigger buybacks — offset by commercial-real-estate losses concentrated in regionals [3][11]. Credit unions look like more of the same: steady asset and membership growth, relentless small-institution consolidation, continued bank-buying — a tailwind for both the vendor ecosystem and community-bank sellers, with the tax exemption the one Washington wildcard [4]. Savings institutions remain a slow-growth, shrinking niche whose best investments are takeover-adjacent. The common thread across all three: the best positions are deposit-and-credit franchises — sticky, low-cost funding, conservative underwriting, adequate capital — not merely high-yielding financial stocks. Near-term watch items for the whole group are the rate path and yield-curve shape, deposit-cost normalization, commercial-real-estate credit, and the pace of consolidation.

For the complete, worked treatment of each child — company tables, deal history, and full economics — see the three leaf primers: 52211 Commercial Banking, 52213 Credit Unions, and 52218 Savings Institutions & Other Depository Credit Intermediation.

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Sources

(Synthesized from the three child primers for NAICS 52211, 52213, and 52218, plus our ingested federal ground-truth statistics file for NAICS 5221.)

1. U.S. Census Bureau, County Business Patterns: 2023, NAICS 5221 and children 522110 / 522130 / 522180 (establishments, employment, payroll). Histometrics ingested federal ground truth for NAICS 5221. https://www.census.gov/data/datasets/2023/econ/cbp/2023-cbp.html
2. U.S. Census Bureau, 2022 Economic Census — Concentration of Largest Firms for the United States, NAICS 5221 and children (firms, receipts, CR4/CR8/CR20/CR50, HHI). Histometrics ingested ground truth. https://data.census.gov/table/ECNSIZE2022.EC2200SIZECONCEN
3. FDIC, Quarterly Banking Profile — Fourth Quarter 2025 and Q1 2026 (commercial-bank and system assets ≈ $25.3T, NIM, net income, charge-offs, unrealized losses, savings-institution counts). https://www.fdic.gov/quarterly-banking-profile
4. National Credit Union Administration, "Fourth Quarter 2025 Credit Union System Performance Data" and "Quarterly Credit Union Data Summary: 2026 Q1" (assets ≈ $2.43T, ~145M members, NIM, net worth, consolidation, bank acquisitions). https://ncua.gov/analysis/credit-union-corporate-call-report-data/quarterly-data-summary-reports
5. FDIC, BankFind Suite / Historical Trends (savings institutions ≈ 521, aggregate assets ≈ $1.07T, year-end 2025); OCC, Qualified Thrift Lender / Home Owners' Loan Act (65% test). https://banks.data.fdic.gov/; https://www.occ.gov/news-issuances/bulletins/2013/bulletin-2013-30.html
6. U.S. Census Bureau, 2022 NAICS Manual — 522110, 522130, 522180 definitions and exclusions; subsector 522 structure. https://www.census.gov/naics/reference_files_tools/2022_NAICS_Manual.pdf
7. FDIC / Statista, "Number of FDIC-insured U.S. commercial banks" (bank-count decline from >8,000 to ~3,900). https://www.statista.com/statistics/184536/number-of-fdic-insured-us-commercial-bank-institutions/
8. LegalClarity, "The Biggest Regional Banks in the United States" (Capital One–Discover, ~$35B, May 2025); Federal Register, "Request for Information on Industrial Banks and Industrial Loan Companies" (FDIC RFI, July 2025). https://www.federalregister.gov/documents/2025/07/21/2025-13589/request-for-information-on-industrial-banks-and-industrial-loan-companies-and-their-parent-companies
9. Invesco, "KBW Bank ETF (KBWB)"; State Street Global Advisors, "SPDR S&P Regional Banking ETF (KRE)." https://etfdb.com/etf/KBWB/
10. Federal Reserve Bank of Kansas City, "Market Structure of Core Banking Services Providers," 2023 (core processors serving credit unions and banks); issuer filings for Fiserv, FIS, Jack Henry, Alkami, Q2, MeridianLink, nCino, Visa. https://www.kansascityfed.org/research/payments-system-research-briefings/market-structure-of-core-banking-services-providers/
11. Federal Reserve Board / OCC / FDIC, "Agencies request comment on proposals to modernize the regulatory capital framework" (Basel III endgame re-proposal), March 19, 2026. https://www.federalreserve.gov/newsevents/pressreleases/bcreg20260319a.htm
12. Congressional Research Service, "Federal Reserve Cuts Interest Rates in Late 2025" (federal funds rate 3.50%–3.75%). https://www.congress.gov/crs-product/IN12635