NNN vs O: Which Is the Better Buy in 2026?
Last updated August 2026
Short answer
NNN and O are similarly sized, but NNN trades noticeably cheaper on forward earnings (21.93x vs 37.41x): the market is paying up for O's profile and pricing NNN more conservatively, or for faster growth. Which you prefer comes down to the drivers you believe, and whether adding either over-concentrates what you already own.
NNN vs O: the tie-breaker metrics
Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.
| Metric | NNN | O | What it tells you |
|---|---|---|---|
| Forward P/E | 21.93 | 37.41 | Valuation on next year's expected earnings, the same yardstick for both. Lower is cheaper for that growth; higher means the market is paying up. |
| Trailing P/E | 22.74 | 52.35 | Valuation on the last 12 months. A big drop from trailing to forward means the market expects earnings to jump, so more growth is already in the price. |
| Beta | 0.78 | 0.73 | Volatility vs the market. Above 1 swings harder than the index; below 1 is steadier. Higher beta means bigger drawdowns to hold through. |
| Price vs 52-week range | 65% of range | 66% of range | Where today's price sits between the 52-week low and high. Near the high is momentum with less margin of safety; near the low is out of favor or a discount, depending on why. |
| Price / book | 1.99 | 1.52 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Reading it: NNN is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.
Before you buy: how NNN and O affect your concentration
The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. NNN and O share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.
This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined NNN and O exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.
What does NNN REIT (NNN) do?
NNN REIT, Inc. is a Maryland corporation formed in 1984 and headquartered in Orlando, Florida, and it operates as a fully integrated real estate investment trust focused on freestanding, single-tenant retail property leased under long-term net leases. Known as National Retail Properties before its 2023 renaming, the company owned 3,774 properties covering roughly 40.4 million square feet as of June 30, 2026, with occupancy at 99.1% and a weighted average remaining lease term of 10.1 years. Tenants sign leases where they cover taxes, insurance and maintenance, which keeps NNN's own capital expenditure minimal and makes rent close to a pass-through. Annualized base rent reached $959.1 million at the end of the second quarter, up 7.3% year over year. Exposure skews toward service and experience retail rather than goods that ship in a box: automotive service was 18.6% of annualized base rent at the end of 2025, convenience stores 16.3%, restaurants of both kinds 14.3%, entertainment 7.2% and dealerships 6.6%. Its five largest tenants, 7-Eleven, Mister Car Wash, Dave & Buster's, Camping World and Kent Distributors, together account for 17.8% of rent, and no single tenant reached 10% of rental income.
What does Realty Income Corporation (O) do?
Realty Income Corporation (NYSE: O), founded in 1969 and headquartered in San Diego, California, is a real estate investment trust that acquires, owns, and manages freestanding, single-tenant commercial properties leased under long-term triple-net agreements. Under a triple-net lease, tenants bear property taxes, insurance, and maintenance costs, making revenue highly predictable; rental income forms over 99% of total revenue. As of Q1 2026, the portfolio spanned more than 15,600 properties leased to approximately 1,600 clients across 92 industries in all 50 U.S. states, the United Kingdom, and seven other European countries. Top tenants include essential and service-oriented businesses such as Walgreens, Dollar General, Dollar Tree, FedEx, Walmart, and CVS, which are considered relatively resistant to e-commerce disruption. The company earns its return by purchasing properties at cap rates meaningfully above its cost of capital and collecting contractual rent escalators over weighted average remaining lease terms of roughly nine years.
NNN vs O: how do they differ?
Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.
- NNN drivers: A 37-year dividend increase streak with room underneath it; Acquisition spread wider than the cost of the money funding it.
- O drivers: Monthly dividend compounding with a 30-plus year growth streak; Accelerating global acquisition pipeline at attractive spreads.
Which fits which kind of investor
A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Interest rates sit at the center of the risk list, because a higher risk-free yield both compresses what income investors will pay for NNN's dividend and raises the borrowing cost that determines whether new acquisitions are accretive at all. For O, interest rate sensitivity is the primary structural risk: O's share price is materially affected by movements in Treasury yields because investors compare its dividend yield against risk-free alternatives, and rising rates also increase borrowing costs that narrow acquisition spreads.
NNN or O: which should you pick?
NNN vs O: the full fundamentals
NNN. Net-lease REITs are valued on funds from operations rather than earnings, because heavy real estate depreciation makes GAAP net income understate cash generation; NNN reported trailing twelve-month diluted EPS near $2.03, which puts the trailing P/E around 23x while the price to AFFO multiple sits near 13x, and the second figure is the one the sector trades on. Second quarter 2026 results, reported August 5, showed revenue of $244.3 million (up 7.7% year over year), Core FFO of $0.89 per share (up 6.0%) and AFFO of $0.90 per share (up 5.9%), with management raising both AFFO guidance and its acquisition volume target. Compared with larger peer Realty Income, NNN trades at a similar AFFO multiple on a smaller, U.S.-only, service-retail-weighted portfolio, so the valuation debate usually comes down to whether a more concentrated tenant roster deserves the same multiple as a globally diversified one.
O. REITs are most meaningfully valued on AFFO rather than GAAP earnings, because depreciation charges make net income a poor proxy for cash generation; on a price-to-AFFO basis, O trades at roughly 14x forward AFFO using the midpoint of 2026 guidance and the late-June 2026 share price near $62, which is in line with its historical range but a premium to smaller net-lease peers. The ~5.2% dividend yield is among the highest O has offered in the past decade, reflecting both share-price compression from elevated interest rates and management's consistent payout increases. Investors weighing the valuation should note that the 2026 investment volume guidance of $9.5 billion, if executed at the recent ~7% cash yield, is the most aggressive acquisition posture in the company's history and could drive meaningful AFFO per share acceleration, but also increases sensitivity to any deterioration in capital market access.
Headline figures (approximate, August 2026): NNN shows revenue (ttm through june 30, 2026) ~$953 million, market capitalization ~$8.9 billion (~192 million shares near ~$46), affo per share (2026 guidance, raised august 2026) ~$3.55 to $3.59, price to affo (2026 guidance midpoint) ~13x; O shows revenue (fy 2025) ~$5.76 billion, affo per share (fy 2025, full year) ~$4.28, affo per share (q1 2026, most recent quarter) ~$1.13 (+6.6% YoY), 2026 affo per share guidance (raised after q1 2026) $4.41 to $4.44.
The bottom line: NNN vs O
NNN and O are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined NNN and O exposure against your real portfolio. It is not an investment adviser.
Wondering how NNN or O fits the portfolio you already own? Walnut is an AI investing app that connects your brokerage read-only and answers questions like that about your actual holdings: overlap, concentration, and how each position tracks the S&P 500. Compare the best AI portfolio analyzers or see the best AI investing apps in 2026.
Investing in NNN REIT with AI
Connect the broker you already use and ask Walnut's AI how NNN fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.
FAQ
What is the difference between NNN and O?
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NNN REIT, Inc. Realty Income Corporation (NYSE: O), founded in 1969 and headquartered in San Diego, California, is a real estate investment trust that acquires, owns, and manages freestanding, single-tenant commercial properties leased under long-term triple-net agreements. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.
Is NNN or O the better stock?
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Neither is universally better; they suit different views and risk levels. Walnut is informational, not investment advice. Compare what each does, the tie-breaker metrics above, and the risks, then decide which fits your thesis and what you already own.
Which is cheaper, NNN or O?
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On forward P/E (as of August 2026), NNN trades at 21.93x and O at 37.41x, so NNN is the cheaper of the two on next year's expected earnings. A lower multiple is not automatically the better buy: a richer valuation can be justified by faster growth, and a lower one can reflect real risk. Weigh the multiple against how fast each business is compounding.
Should you own both NNN and O?
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Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both, and whether adding either over-concentrates you, before you buy.
What are the risks of NNN vs O?
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NNN: Interest rates sit at the center of the risk list, because a higher risk-free yield both compresses what income investors will pay for NNN's dividend and raises the borrowing cost that determines whether new acquisitions are accretive at all. Tenant concentration is the second issue: 17.8% of annualized base rent comes from five tenants, and several of the largest exposures, including car washes, a casual dining and entertainment chain, an RV retailer and theaters at 3.7% of rent, sit in categories that have seen operator distress through prior cycles. Geographic clustering adds to it, with Texas alone at 18.4% of rent and the top five states at 40.9%. Because NNN funds growth partly through at-the-market equity issuance, a sustained share price decline makes external growth dilutive rather than accretive, which is the mechanism that stalls net-lease REITs in bad tape. One more structural point: as a REIT NNN must distribute most of its taxable income, so it cannot retain earnings the way an operating company can, and any prolonged capital markets closure would slow the acquisition engine directly. O: Interest rate sensitivity is the primary structural risk: O's share price is materially affected by movements in Treasury yields because investors compare its dividend yield against risk-free alternatives, and rising rates also increase borrowing costs that narrow acquisition spreads. Tenant credit quality is a secondary concern, as a portion of credit losses has been traced to tenants acquired through recent M&A transactions, and retail bankruptcies or store-closure programs could pressure occupancy below its historically stable 98-plus percent level. Currency risk is growing as European investments expand, with local-currency debt only partially hedging revenue exposure. The stock trades at a GAAP P/E of roughly 52x (as of late June 2026), a significant premium to the broader REIT sector, meaning any disappointment in AFFO growth or guidance could weigh disproportionately on share price.
Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell NNN or O; figures are approximate and dated (as of August 2026). Verify current data before investing.