ABB vs SIEGY: Which Is the Better Buy in 2026?

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. ABB and SIEGY 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 ABB and SIEGY 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.

ABB Ltd is a global technology company headquartered in Zurich, Switzerland, that builds the hardware and software behind electrification and automation. Its business spans low- and medium-voltage electrical products, switchgear and building systems (Electrification), electric motors, drives and traction (Motion), and control systems, measurement and industrial software (Process Automation). Historically it also ran a Robotics division, but in 2025 ABB agreed to divest that unit to SoftBank Group for an enterprise value of roughly $5.4 billion, moving the company to three reporting business areas. ABB reports in US dollars, sells into utilities, data centers, manufacturers, transport and infrastructure customers worldwide, and competes with the likes of Siemens, Schneider Electric and Rockwell Automation.

Full ABB guide

Siemens AG is one of Europe's largest industrial technology companies, headquartered in Munich. It runs four main businesses: Digital Industries (factory automation hardware such as PLCs and drives, plus industrial software including Xcelerator, Teamcenter, NX and the recently acquired Altair and Dotmatics), Smart Infrastructure (electrical products, grid technology and building systems, a big beneficiary of data center and electrification spending), Mobility (rail vehicles, signaling and rail software), and a roughly 67% stake in Siemens Healthineers, the medical imaging and diagnostics company that Siemens plans to separate. Fiscal years end on September 30, and US investors typically hold the company through the SIEGY sponsored ADR, which trades over the counter in dollars rather than on a US exchange. The company employs roughly 300,000 people, sells in close to 190 countries and generates a large share of revenue outside Germany, with the US and China among its biggest markets.

Full SIEGY guide

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

• ABB drivers: Electrification and grid demand; Automation and energy-efficient motion.
• SIEGY drivers: Electrification and data center demand at Smart Infrastructure; Industrial software and the Altair and Dotmatics deals.

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: ABB is a cyclical industrial whose orders and revenue track global capital spending, so a slowdown in manufacturing, construction or utility investment would pressure growth. For SIEGY, siemens is cyclical at the margin: an industrial slowdown, weaker China demand or a pause in data center spending would hit orders and the premium multiple at the same time.

Pick ABB if you believe its drivers more; SIEGY 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 ABB and SIEGY guides.

ABB. ABB posted a record 2025, with revenue up about 9% to roughly $33 billion, orders up about 17% near $37 billion, and net income up about 20% to around $4.7 billion, and it reported record-high orders again in the second quarter of 2026. As of mid-2026 the stock traded at a premium, with a trailing P/E in the mid-30s and a forward multiple near 30, a premium built on strong returns on capital (ROE near 29%) and secular demand. Market figures here were not refreshed in October 2026 because a current ADR quote was not available, so they are approximate and dated.

SIEGY. At a Frankfurt share price around €240, Siemens trades at roughly 21 times the midpoint of its raised fiscal 2026 EPS guidance, a premium to its own history and to many diversified industrials but below pure-play electrification and automation names such as Schneider Electric. The SIEGY ADR represents one-half of an ordinary share, so its dollar price is roughly half the euro share price converted at the current exchange rate. Full fiscal 2026 results are due in mid-November 2026. The quarterly cadence matters for ADR holders: results arrive in November, February, May and August, and the ADR typically reacts in the US session following the morning German release.

Headline figures (approximate, October 2026 (FY2025 figures; market data from mid-2026)): ABB shows revenue (fy2025) ~$33.2B, orders (fy2025) ~$36.8B, net income (fy2025) ~$4.7B, operational ebita margin ~19%; SIEGY shows revenue (ttm) ~€81 billion, fiscal q3 2026 orders ~€27.9 billion (book-to-bill ~1.34), order backlog ~€132 billion, fy2026 eps pre-ppa guidance ~€11.20 to €11.50.

ABB and SIEGY 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 ABB and SIEGY exposure against your real portfolio. It is not an investment adviser.