ABM vs ARMK: Which Is the Better Buy in 2026?

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.

Reading it: ABM 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. ABM and ARMK 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 ABM and ARMK 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.

ABM Industries Incorporated (NYSE: ABM) sells building services under contract. It runs five reportable segments: Business & Industry, the commercial real estate portfolio and the largest at ~$2.08 billion of revenue in the first half of fiscal 2026; Manufacturing & Distribution at ~$886 million; Aviation at ~$609 million; Education at ~$461 million; and Technical Solutions at ~$497 million. Cut the same revenue by what the work actually is, and janitorial alone accounted for ~$2.64 billion of the ~$4.53 billion first half, with operations and maintenance, energy solutions, parking and airport ground services making up the rest. The company began in 1909 as a San Francisco window washing business and today employs over ~100,000 people. Its fiscal year ends October 31, so its quarters run a month ahead of the calendar.

Full ABM guide

Aramark feeds and services places other people own. It holds multi-year contracts to run cafeterias for corporate campuses, dining and retail for colleges and K-12 districts, patient and staff food service inside hospitals, and concessions plus premium hospitality at stadiums, arenas, convention centers and national parks. Alongside the food is a facilities business covering custodial work, plant operations, energy management and grounds. The reporting structure splits into Food and Support Services United States (organized around Business & Industry, Education, Healthcare, Sports, Leisure & Corrections, and Facilities) and Food and Support Services International, which spans Europe, Latin America and Asia. In September 2023 the company completed the tax-free spin-off of its uniforms and workplace supplies segment as Vestis Corporation (NYSE: VSTS), distributing one Vestis share for every two Aramark shares held. That separation removed a capital-intensive route-based rental business and left Aramark as a pure-play food and facilities operator.

Full ARMK guide

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

• ABM drivers: Technical Solutions is where the growth is; Aviation is ramping on new contracts.
• ARMK drivers: Net new business and the outsourcing runway; Margin expansion on a fixed cost base.

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: Business & Industry, at nearly half of revenue, was essentially flat in the April quarter as client exits offset international wins, so the largest piece of ABM is not currently growing. For ARMK, food-service contracting is a low-margin, high-labor business, so wage inflation, staffing shortages and food-cost spikes compress profit faster than they show up in revenue, and pass-through pricing tends to lag by a quarter or more.

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 ABM if you believe its drivers more; ARMK 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 ABM and ARMK guides.

ABM. The two multiples tell different stories and both are real. Trailing GAAP earnings of ~$2.60 put the stock near ~18x, while the midpoint of company guidance near ~$4.00 puts it closer to ~12x, and the difference is acquisition amortization, restructuring charges and other items ABM excludes from its adjusted figures. Adjusted EBITDA was ~$131.7 million in the April quarter versus ~$125.9 million a year earlier, so enterprise value including the ~$1.9 billion of debt sits at roughly ~9x annualized adjusted EBITDA.

ARMK. Aramark reported second-quarter fiscal 2026 revenue of roughly ~$4.91 billion, up about ~14.7% year over year, and raised the organic growth outlook to the high end of its ~7% to ~9% range while reaffirming adjusted EPS growth of ~20% to ~25%. Third-quarter fiscal 2026 results are scheduled for August 11, 2026, so the figures above reflect the reported first half plus guidance rather than a completed year. The wide gap between the trailing and forward multiple is the market pricing in that guided earnings step-up, which makes the upcoming print a meaningful checkpoint.

Headline figures (approximate, August 2026): ABM shows revenue (ttm) ~$9.05 billion, net income (ttm) ~$158 million, a ~1.7% net margin, diluted eps (ttm, gaap) ~$2.60, fy2026 adjusted eps guidance ~$3.85 to ~$4.15; ARMK shows revenue (ttm) ~$19.4 billion, fy2026 revenue guidance ~$19.55 billion to ~$19.95 billion, market capitalization ~$14.8 billion, enterprise value ~$20.8 billion.

ABM and ARMK 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 ABM and ARMK exposure against your real portfolio. It is not an investment adviser.