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

Same yardstick, side by side (as of October 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. In September 2026 ADT also began selling its ADT Blu self-setup line on Walmart.com, a step toward the DIY buyers it has historically ceded to rivals.

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 total debt of roughly $7.8 billion and only about $36 million of cash at mid-2026, 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. At $6.93 the stock sits near 7x forward earnings and about 4.7x EV/EBITDA, and trailing free cash flow equals roughly a quarter of its market cap. The third-quarter report, expected around November 5, 2026 (consensus EPS about $0.23 on $1.32 billion of revenue), will show whether the flat-but-steady pattern continues.

ALLE. Allegion trades at roughly 21 times trailing and 16 times forward earnings as of October 16, 2026, a smaller premium than in mid-2026 as earnings have grown faster than the share price. The second quarter showed revenue growth accelerating to about 12.7 percent with an earnings beat, helped by acquisitions. The 11 analysts tracked by Yahoo Finance had a mean target near $178, and Evercore ISI raised its target to $180 in October.

Headline figures (approximate, October 2026): ADT shows revenue (ttm) ~$5.2B (+~2% YoY latest qtr), recurring monthly revenue (rmr, end of 2025) ~$359M (~$4.3B annualized), adjusted eps (last four quarters) ~$0.23 each quarter, net income (ttm) ~$614M; ALLE shows revenue (ttm) ~$4.29 billion, up ~12.7% YoY in Q2 2026, q2 2026 revenue and adjusted eps ~$1.15 billion; ~$2.40 vs ~$2.22 expected, net income (ttm) ~$659 million (~15% net margin, ~22% operating margin), market cap ~$13.3 billion (stock ~$156).

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.