ADT vs ALLE: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of September 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.

Reading it: ADT 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.

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. ADT and ALLE 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 ADT and ALLE 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.

ADT Inc. provides security, interactive, and smart-home solutions to residential and small-business customers across the United States, with its core business built on professionally installed and monitored alarm systems billed as recurring monthly revenue (RMR). The company reported total revenue of roughly $5.1 billion for full-year 2025 and end-of-period RMR of about $359 million (around $4.3 billion annualized), with monitoring and related services making up the large majority of revenue. Partnerships with Google (devices and AI) and State Farm (insurance-linked distribution), plus its February 2026 acquisition of Origin AI for Wi-Fi sensing, are meant to modernize the offering and improve retention.

Full ADT guide

Allegion plc is a leading manufacturer of mechanical and electronic security products, operating through two segments: Allegion Americas (its largest, roughly two-thirds of revenue) and Allegion International. Its portfolio spans door locks and locksets, key systems, door closers, exit devices, automatic entrances, and a growing layer of electronic access control, mobile credentials, and cloud software. Core brands include Schlage, LCN, Von Duprin, and Stanley Access Technologies, sold into institutional, commercial, and residential markets such as education, healthcare, government, hospitality, and multi-family housing.

Full ALLE guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• ADT drivers: Recurring monthly revenue base; Cash flow and capital returns.
• ALLE drivers: Pricing power and spec-driven demand; Electronics, access control, and software mix shift.

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: ADT carries substantial leverage, with net debt of roughly $7.5 billion, so higher-for-longer interest rates raise refinancing and interest costs. For ALLE, organic volume growth has been weak, so growth has depended on price and acquisitions, which is harder to sustain if pricing normalizes.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick ADT if you believe its drivers more; ALLE if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the ADT and ALLE guides.

ADT. ADT trades as a leveraged, cash-generative subscription business, with an enterprise value well above its equity value because of the large debt load. Full-year 2025 revenue grew about 5 percent while 2026 guidance points to roughly flat revenue and adjusted EPS with an emphasis on free cash flow. The stock has traded in the high single digits per share, and the small dividend plus a $1.5 billion buyback authorization frame much of the capital-return case.

ALLE. Allegion trades at a premium valuation, roughly 24 times trailing and 21 times forward earnings, consistent with its high-margin, cash-generative profile. Recent revenue growth was boosted by acquisitions and currency, while organic growth and adjusted EPS were softer, reflecting price-led gains against volume declines. Analyst consensus has generally clustered around a hold-type stance near recent price levels.

Headline figures (approximate, July 2026): ADT shows revenue (fy2025) ~$5.1B, recurring monthly revenue (rmr) ~$359M (~$4.3B annualized), adjusted eps (fy2025) ~$0.89, adjusted free cash flow (fy2025, incl. swaps) ~$863M; ALLE shows revenue (ttm) ~$4.0 billion, q1 2026 revenue ~$1.03 billion (up ~9.7%, ~2.6% organic), q1 2026 adjusted eps ~$1.80 (down ~3%), market cap ~$11.5 billion.

ADT and ALLE 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 ADT and ALLE exposure against your real portfolio. It is not an investment adviser.