KEYS — KEYSIGHT TECHNOLOGIES

Keysight Technologies holds an 18% share of the global test and measurement market, generates 65% gross margins on instruments and software that customers cannot easily replace, and has grown its software recurring revenue to 29% of total revenue — a structural shift that makes the business less cyclical than its hardware origins suggest. The stock has appreciated 140% in the past twelve months as the industry emerged from a severe 2023–2024 downturn, and now trades at roughly 41 times forward non-GAAP earnings — nearly 25% above its five-year historical average multiple, pricing in a level of compounding growth that leaves nothing for the investor when the next technology cycle pauses. Good business, meaningfully overpriced.

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The test and measurement industry spent most of 2023 and 2024 working through the consequences of an extraordinary overordering cycle. Customers who had raced to expand 5G infrastructure and semiconductor capacity in 2021 and 2022 — bidding aggressively for Keysight's instruments during a supply-constrained period — spent the following two years absorbing excess inventory and pausing new capital commitments. The commercial communications segment fell sharply. Asia, which had been the fastest-growing region, declined approximately 17% in fiscal 2024. Keysight's revenue, which had reached $5.43 billion at peak, fell to $4.98 billion in fiscal 2024. The stock declined from over $200 per share to below $140.

By fiscal 2025 the recovery was unambiguous. Revenue climbed back to $5.37 billion. In the first quarter of fiscal 2026, Keysight reported $1.60 billion in revenue — a 23% increase year-over-year — with orders growing 30% and a book-to-bill ratio of 1.03. The backlog reached a record $2.8 billion. Every segment grew double-digits. The stock responded accordingly, moving from below $150 to over $350. This recovery has now been fully priced.

The challenge in analyzing Keysight is separating the quality of the underlying business — which is high — from the quality of the current entry point — which is poor. These are different questions. The answer to the first question determines whether the business deserves a place on any serious watchlist. The answer to the second determines whether the current price deserves ownership. They do not require the same answer.

The test and measurement market encompasses the instruments and software that engineers use to design, validate, manufacture, and maintain electronic systems. Every semiconductor chip must be tested at multiple stages of production. Every 5G base station must be validated against published standards before deployment. Every autonomous vehicle radar must be characterized against specifications before it can be certified. Every aerospace component that carries a flight crew must pass electromagnetic compatibility testing. None of this can be done without specialized instruments — vector network analyzers, oscilloscopes, spectrum analyzers, signal generators — and increasingly, without the software that automates the measurement process and translates raw data into actionable conclusions.

The global test and measurement market is approximately $38 to $40 billion in 2025, growing at roughly 4 to 6% per year in normal conditions. The structural characteristics that make the market attractive are not primarily its growth rate but its stickiness. A calibrated instrument is embedded in a customer's quality management system, its measurement history is tracked against calibration certificates, and the software toolchains that process its output are written against proprietary APIs. Switching from one vendor to another does not mean buying a different box — it means recertifying workflows, retraining engineers, renegotiating service agreements, and accepting a period of measurement uncertainty during the transition. These costs are real, not theoretical, and they explain why the industry's incumbent players have defended their positions across multiple technology generations despite the entry of capable competitors.

The four primary players in professional T&M are Keysight, Rohde & Schwarz (private, approximately €3 billion in annual revenue), Fortive's Tektronix, and Anritsu. Keysight holds approximately 18% of the overall market — the largest position — and is the dominant player in the highest-growth segments: 5G and 6G wireless test, AI data center validation, and aerospace and defense. Rohde & Schwarz is a credible competitor at the high end of RF test but generates roughly 60% of Keysight's revenue and publishes no margin data. Tektronix is strongest in oscilloscopes but operates within Fortive's broader conglomerate with limited direct comparability. Anritsu has a meaningful position in handheld and field test but operates at substantially smaller scale.

Keysight was spun off from Agilent Technologies in November 2014 after Agilent separated its life sciences and diagnostics business from its electronic measurement business. The company retained Agilent's historical T&M heritage, which traces to the 1939 founding of Hewlett-Packard. The inherited intellectual property, customer relationships, and calibration infrastructure represent six decades of engineering investment that cannot be replicated by a new entrant in any commercially relevant timeframe.

The business operates through two segments. The Communications Solutions Group (CSG) accounts for approximately 70% of revenue and serves commercial communications customers — wireless OEMs, hyperscalers, semiconductor companies building chips for AI infrastructure — as well as aerospace, defense, and government customers. The Electronic Industrial Solutions Group (EISG) accounts for the remaining 30% and serves automotive, energy, semiconductor manufacturing, and general electronics markets. In the first quarter of fiscal 2026, CSG grew 27% year-over-year and EISG grew 15% — both segments showing momentum broad enough to confirm that the recovery is structural rather than isolated to a single end market.

The PathWave software platform is the most strategically important aspect of Keysight's business model over the next decade. PathWave encompasses electronic design automation (EDA) software for RF and high-speed digital design, automation and programming tools, data analysis software, and application-specific instrument software. Management has reported double-digit annual recurring revenue growth from PathWave. In fiscal 2025, software and services represented 37% of total revenue, with annual recurring revenue at 29% of total revenue — up from approximately 20% in 2022. The target is above 35% recurring revenue in the medium term. Each percentage point of revenue that converts from hardware-and-one-time to software-and-recurring represents a compositional improvement in the quality of earnings: more predictable, higher margin, less susceptible to the order-cancellation dynamics that amplified the 2023–2024 downturn.

The competitive moat is primarily a function of three interlocking factors. First, measurement science IP accumulated over decades. Keysight's instruments perform measurements that require deep knowledge of signal behavior, interference patterns, and calibration mathematics — knowledge embedded in both the hardware design and the firmware. A competitor can build a box that outputs numbers, but replicating the measurement accuracy and repeatability that customers have certified against regulatory and product specifications requires years of investment that rarely produces an adequate return for a new entrant.

Second, standards engagement. Keysight participates in the technical bodies that define 5G, 6G, and automotive electromagnetic compatibility standards. This participation provides early visibility into the measurement specifications that next-generation products will require, allowing Keysight to ship compliant test equipment before customers need it. The company won Frost & Sullivan's 2025 Global 6G Test and Measurement Company of the Year award and demonstrated 6G test capabilities at Mobile World Congress 2026 — positioning that reflects years of standards body involvement, not months of product development. When a wireless OEM begins 6G device validation, Keysight is the first call because Keysight helped write the standard being tested against.

Third, service and calibration network stickiness. Keysight's KeysightCare program — instruments, software, calibration, repair, consulting — creates an ongoing relationship with customers that hardware purchase alone does not. Once a customer's quality management system depends on Keysight calibration certificates and service records, changing vendors is not merely an equipment decision; it is a quality system decision with regulatory implications in aerospace, defense, and automotive contexts. A 2020 Keysight survey found that 97% of R&D engineers reported direct revenue losses from equipment issues and 53% reported losses exceeding $100,000 per day — which is the market research equivalent of quantifying switching costs in the customer's own language.

The evidence for the moat's durability is in the margin structure. Keysight's gross margin in fiscal 2025 was 65%, and expanded to 66.7% in the first quarter of fiscal 2026. For a company that manufactures physical instruments, a 65% gross margin is exceptional — it implies significant pricing power and software content. In comparison, Rohde & Schwarz does not disclose margins as a private company, but the structure of the competitive market and the frequency of head-to-head battles in major RF test programs strongly suggest Keysight does not compete primarily on price. Customers pay the Keysight premium because the alternative carries measurement uncertainty they cannot afford in mission-critical applications.

Keysight's GAAP financial statements require some untangling. In fiscal 2025, the company reported GAAP net income of $846 million against non-GAAP net income of approximately $1.24 billion — a gap of roughly $394 million. The primary reconciling items are amortization of acquired intangibles (substantial given the $1.46 billion Spirent acquisition, approximately $1 billion ESI Group acquisition, and earlier purchases), stock-based compensation running at roughly 4 to 5% of revenue, and acquisition-related charges. Amortization of intangibles is a real economic cost when it reflects the value being consumed from acquired customer relationships and technology; for a company that repeatedly acquires businesses as part of its growth strategy, treating it as an addback deserves skepticism. The more conservative measure of earning power is free cash flow: $1.3 billion in fiscal 2025, $407 million in the first quarter of fiscal 2026 alone — suggesting the non-GAAP earnings are reasonably representative of cash generation despite the acquisition-related complexity.

The balance sheet carries net debt of approximately $594 million following the Spirent acquisition, against a current ratio of 2.35. Keysight has access to credit and has managed its debt load sensibly. The $1.5 billion share buyback authorization approved in November 2025 represents roughly 2.5% of current market capitalization — meaningful but not aggressive at the current price level. R&D spending of $1.007 billion in fiscal 2025, representing 18.6% of revenue, is the mechanism that sustains the technological leadership position across successive technology cycles. This is not discretionary spending — reducing it would erode the standards-engagement advantage and the measurement science IP that underpin the pricing power.

CEO Satish Dhanasekaran was appointed in May 2022, having led the Communications Solutions Group before taking the top role. His predecessor, Ron Nersesian, served for nine years and built the company's software-centric strategy; Dhanasekaran has accelerated it. The acquisition of ESI Group for approximately €913 million brings virtual prototyping and simulation software for automotive and aerospace applications, extending Keysight's reach into the design phase of the workflow rather than solely the test phase. AnaPico adds Swiss RF/microwave capability at $117 million — a focused, disciplined deal. Riscure at $78 million adds semiconductor security testing, a growing regulatory requirement for IoT and automotive chips. These are sensible, bolt-on acquisitions that reinforce the core platform.

The Spirent acquisition is the most complicated capital allocation decision in Keysight's recent history. The $1.46 billion paid for Spirent Communications was predicated on adding satellite emulation, network automation, and 5G simulation capabilities. The Department of Justice, however, required Keysight to divest Spirent's high-speed Ethernet testing business (where the combined entity would have held 85% market share), its network security testing business (greater than 60% share), and its RF channel emulation business (greater than 50% share). The three most competitively dominant businesses in the portfolio were the price of regulatory clearance. Keysight paid $1.46 billion for a combined entity and was required to sell back the parts of it that would have created genuine monopoly positions. The retained Spirent assets — application-layer network simulation and positioning — are useful but not transformative. Whether the price paid for what was retained will prove rational depends on synergies that have not yet been demonstrated and integration execution that is still in early stages.

The table below tracks the metrics that make Keysight's cycle, margin trajectory, and software transformation visible:

Fiscal Year	Revenue ($B)	Adj. Op. Margin	ARR % of Revenue	Book-to-Bill	FCF ($B)
FY2022	$5.42	~31%	~20%	>1.0	~$1.3
FY2023	$5.43	~25%	~24%	<1.0 (deteriorating)	~$1.1
FY2024	$4.98	~22.6%	~26%	<1.0	~$0.9
FY2025	$5.37	26%	29%	1.08	$1.3
Q1 FY2026 (ann.)	$6.4 (run-rate)	27.4%	29%	1.03	$1.6 (run-rate)

The table tells two stories simultaneously. The first is about the cycle: revenue flat from FY2022 to FY2023, declining in FY2024, recovering in FY2025, and accelerating in the most recent quarter to an annualized run-rate approaching $6.4 billion. The book-to-bill below 1.0 in FY2023 and FY2024 was the early warning signal that revenue would disappoint; the book-to-bill recovering above 1.0 in FY2025 and Q1 FY2026 confirms the recovery trajectory has real order-book support, not just easy comparisons. The second story is about the margin trajectory: adjusted operating margins compressed from approximately 31% at peak to 22.6% at trough — a 840-basis-point decline that illustrates the operating leverage in either direction — and have since recovered to 27.4%, suggesting the operating leverage now works in the investor's favor. The FCF pattern confirms the earnings trajectory: real cash was generated at the peak, real cash was consumed during the recovery investments, and real cash is flowing again at elevated levels.

The ARR column is the thesis metric. Annual recurring revenue growing from approximately 20% of total in FY2022 to 29% in FY2025 is meaningful: the business is becoming structurally less volatile, because a customer who has committed to a multi-year PathWave software subscription does not cancel it when the semiconductor capex cycle turns down. Whether this transformation is proceeding fast enough to prevent the next cycle from being as painful as the last one is the central analytical question for a long-horizon owner. At 29% ARR, the answer is: partially but not yet fully. A business that is 35 to 40% recurring revenue looks substantially different from one at 20%, and Keysight is moving in that direction. But the threshold beyond which the cyclicality is sufficiently dampened to justify a persistently higher multiple is probably above 35% ARR — a level that, at double-digit growth, is approximately two to three years away.

Keysight has captured approximately 18% of a global T&M market of $38 to $40 billion. The remaining 82% is not all addressable — Keysight competes primarily in electronic and electromagnetic test, not mechanical or physical test equipment — but the relevant addressable market in electronic test alone is estimated at $15 to $16 billion in 2025, growing to approximately $20 billion by 2031. Within that segment, Keysight holds roughly one-third market share. The 5G device testing market, where Keysight's UXM platform is the dominant instrument, is projected to double from $1.4 billion in 2023 to $2.6 billion by 2032. The EV test equipment market, where Keysight has active battery validation and charging interoperability programs, is projected to reach $42 billion by 2035 — a market that barely existed a decade ago. The 6G test market is in its earliest innings: commercial 6G is not expected until 2030 or 2031, with significant R&D test spending ramping in the 2027 to 2030 period. These are genuinely large growth opportunities, but their contribution to revenue in the near term is modest. The test equipment for 6G R&D is being sold today; the volume test equipment for 6G device manufacturing will not be purchased in large quantities until commercial deployment begins. Management itself has guided that significant 6G orders are not expected until the second half of fiscal year 2027 — implying that the wireless segment's recovery is 5G and AI-driven, not 6G-driven, and that there is a potential gap in wireless test investment between 5G maturation and 6G ramp.

At the current price of $356.22 per share, Keysight carries a market capitalization of approximately $61 billion and an enterprise value of approximately $61.6 billion. Against fiscal year 2025 free cash flow of $1.3 billion, the stock trades at roughly 47 times free cash flow. Against fiscal year 2026 management guidance of $8.59 in non-GAAP earnings per share, the forward non-GAAP price-to-earnings multiple is approximately 41.5 times. The five-year historical average non-GAAP price-to-earnings multiple for Keysight is approximately 33 to 34 times. The current price represents a 20 to 25% premium to that historical average.

Keysight is a high-quality business that earns exceptional returns on the tangible capital it deploys. The gross margin of 65%, the adjusted operating margin of 26 to 27%, and the free cash flow conversion confirm that the competitive advantages discussed above are economically real — not asserted. A business that can charge prices generating 65% gross margins in industrial instrumentation has genuine pricing power; a business that converts that to $1.3 billion in annual free cash flow has genuine earnings quality. Returns on net tangible assets, adjusting for the substantial goodwill from historical acquisitions, are well above 25% — this is a compounder, not a steady-state industrial business.

The problem is not the business. The problem is that the current price leaves nothing for the investor if the growth assumptions embedded in a 41-times forward multiple do not all materialize simultaneously. The bull case requires AI data center test spending to sustain at 2025 levels or accelerate through 2026 and 2027; 6G R&D test spending to ramp as scheduled in the second half of fiscal 2027; EV and defense test to grow at double-digit rates; software recurring revenue to reach 35%-plus of total in two to three years; Spirent integration to deliver greater than $100 million in promised synergies despite the DOJ-required divestitures; and operating margins to expand toward the 31 to 32% long-term management target. Each of these assumptions is individually plausible. Paying 41 times forward non-GAAP earnings requires all of them.

The intelligent bear argues that Keysight is a cyclical industrial business masquerading as a compounding software platform, and that the current multiple will compress to 25 to 28 times earnings the moment the next capex cycle turns down — delivering a 30 to 40% price decline even if earnings hold at current levels. The response is that the software ARR base is growing fast enough that each successive downturn will be shallower than the last, and that the AI infrastructure and aerospace/defense demand underpins a more durable recovery floor than 5G alone provided in 2022. Both arguments have merit; the bear's is more relevant at 41 times earnings than at 25 times.

For this assessment to change, the price would need to correct to approximately $150 to $180 per share — representing 15 times normalized pre-tax earnings at mid-cycle — before the risk-reward becomes compelling. Alternatively, earnings would need to compound substantially above current guidance over the next several years to grow into the current multiple: at 15% annual growth from the fiscal year 2026 guidance of $8.59, Keysight reaches $17-plus in non-GAAP EPS by fiscal year 2031, at which point the current price represents roughly 21 times trailing non-GAAP earnings — reasonable but requiring five years of performance that matches the most optimistic current scenario. A meaningful price decline or sustained earnings outperformance beyond guidance would alter the conclusion. Neither is visible today.

The instruments that Keysight makes are prerequisites for every significant electronics technology transition of the next decade. That is a structural fact, not a promotional claim. What it is not is a reason to pay 41 times earnings for a business that, by management's own guidance, faces a gap in its most important growth driver between 5G maturation and 6G ramp.