Is Viavi Solutions profitable in 2026?

Viavi posted non-GAAP EPS of $0.27 in Q3 FY2026 (quarter ended March 28, 2026) on revenue of $406.8M, up 42.8% YoY, per its April 29, 2026 earnings report. FY2024 GAAP results showed a net loss of about $26M per Wikipedia, so profitability is strongest on a non-GAAP basis.

Who is Viavi Solutions' biggest competitor?

Keysight Technologies is Viavi's largest direct rival in network test and measurement, with over $25B market cap versus Viavi's, and it outbid Viavi for all of Spirent Communications in 2024 before reselling the HSE unit to Viavi in October 2025.

Could AI replace Viavi Solutions' products?

Unlikely soon: Viavi's core business is calibrated physical test hardware (optical loss test sets, OTDR modules) tied to a 1.8M+ instrument installed base and 3,100+ patents (company claims, as of July 2026). AI is instead a demand driver, with Viavi selling AI-workload traffic emulation tools like CyberFlood.

Who owns Viavi Solutions?

Viavi Solutions is publicly traded on NASDAQ under ticker VIAV, with no single controlling parent. Capital Research and Management Company is its largest disclosed institutional holder at roughly 11.57M shares, per a July 8, 2026 profile.

Why has Viavi Solutions stock risen so much in 2026?

Viavi shares rose about 332% over the trailing year as of the April 29, 2026 earnings report, driven by AI-datacenter demand and the October 16, 2025 Spirent HSE acquisition, which pushed NSE segment growth to 54.4% YoY and now 79% of total revenue.

What did Viavi Solutions acquire recently?

Viavi closed the acquisition of Spirent Communications' high-speed Ethernet, network security and channel emulation business from Keysight on October 16, 2025, after losing a 2024 bidding war for all of Spirent. It also closed the $150M Inertial Labs acquisition in Q1 2025.

Telecom infrastructure · United States

Viavi Solutions

viavisolutions.com ↗

Viavi makes test, measurement and optical hardware for telecom and data-center networks.

Defensible for now

Assessed 25 July 2026 · Evidence as of 25 July 2026

Real protection, with named pressure against it.

On the recordSince 25 July 2026 · Checkable from August 6, 2026 · Every call on the record Checkpoint: Q4 FY2026 earnings, showing whether NSE growth holds as Spirent comps harden

The call

Viavi's hardware and patent base keep customers locked in, but its current growth leans heavily on one acquisition and hyperscaler AI capex holding up.

Viavi Solutions sells hardware and software that test whether phone networks and internet cables work properly. It is hard to copy because it owns thousands of patents, has 1.8 million machines already installed at customer sites, and controls the only color-changing film used in fiber-optic testing, plus customers rely on Viavi's approval process to certify their equipment. However, the company's reported 43 percent growth is mostly from buying another company called Spirent last October, not from selling more to new customers on its own, and 79 percent of revenue now comes from testing chips for artificial intelligence data centers, which means the business rises and falls with how much money tech giants like Google and Amazon spend on AI. The one thing that could change everything is whether big tech companies slow their spending on new AI equipment in the next year or two, which would sink both revenue and the stock price even if the company stays profitable.

Why

AI pressure: None apparent. AI datacenter buildouts are feeding Viavi's growth through hyperscaler test gear demand, not eating it, for now. Could AI do the core job? Unlikely.

Bigger players: Keysight Technologies. Keysight competes broadly in test and measurement and could push a fiber/optical field-test line at Viavi's accounts. Could a giant copy it? Probably.

What protects it. 1.8M+ installed test units, 3,100+ patents, an OSP anti-counterfeit pigment near-monopoly, and certification workflows that lock in carriers.

What would change this call

Viavi Q4 FY2026 earnings (~Aug 6, 2026) show NSE segment growth vs prior quarter. Tests whether AI-datacenter-driven growth is holding or decelerating as Spirent comps normalize.
Keysight announces a fiber or optical field-test product win at a named Viavi hyperscaler account. Would show the incumbent moat is being breached by a direct competitor.
Hyperscaler capex guidance (Microsoft, Meta, Amazon, Google) for 2026-2027 cools or flattens. Would signal the concentration risk in Viavi's 79%-NSE revenue base is materializing.

Key numbers

FY2025 annual revenue $1.08B (2026-07-20)
Q3 FY2026 revenue grew 42.8% YoY (2026-04-29)
NSE segment now ~79% of total revenue (2026-04-29)

Named risks

Revenue concentration: NSE segment is ~79% of total revenue, tied to hyperscaler AI-datacenter capex as of Q3 FY2026. Severity: high
Stock already up 332% trailing year as of April 2026, then fell 28.5% by July 2026, signaling re-rating risk. Severity: high
Integration risk from Oct 2025 Spirent HSE acquisition still inflating YoY comps. Severity: medium
Insider selling by CEO and executives logged through Dec 2025 to Feb 2026 during stock run-up. Severity: medium
Ongoing optical filter patent litigation with Platinum Optics Technology. Severity: low

Rivals, as read in July 2026

Rival	Direction	Evidence
Keysight Technologies	gaining on	Outbid Viavi for all of Spirent in 2024, later resold HSE unit to Viavi Oct 16, 2025
Anritsu	contesting	Strong Asia/RF and wireless test presence, direct overlap in network test market
NetScout Systems	contesting	Analytics-led network monitoring competes for enterprise assurance budgets
EXFO	contesting	Price-sensitive fiber-optic field test segment overlaps with Viavi's portable testers

Questions people ask

Is Viavi Solutions profitable in 2026?: Viavi posted non-GAAP EPS of $0.27 in Q3 FY2026 (quarter ended March 28, 2026) on revenue of $406.8M, up 42.8% YoY, per its April 29, 2026 earnings report. FY2024 GAAP results showed a net loss of about $26M per Wikipedia, so profitability is strongest on a non-GAAP basis.
Who is Viavi Solutions' biggest competitor?: Keysight Technologies is Viavi's largest direct rival in network test and measurement, with over $25B market cap versus Viavi's, and it outbid Viavi for all of Spirent Communications in 2024 before reselling the HSE unit to Viavi in October 2025.
Could AI replace Viavi Solutions' products?: Unlikely soon: Viavi's core business is calibrated physical test hardware (optical loss test sets, OTDR modules) tied to a 1.8M+ instrument installed base and 3,100+ patents (company claims, as of July 2026). AI is instead a demand driver, with Viavi selling AI-workload traffic emulation tools like CyberFlood.
Who owns Viavi Solutions?: Viavi Solutions is publicly traded on NASDAQ under ticker VIAV, with no single controlling parent. Capital Research and Management Company is its largest disclosed institutional holder at roughly 11.57M shares, per a July 8, 2026 profile.
Why has Viavi Solutions stock risen so much in 2026?: Viavi shares rose about 332% over the trailing year as of the April 29, 2026 earnings report, driven by AI-datacenter demand and the October 16, 2025 Spirent HSE acquisition, which pushed NSE segment growth to 54.4% YoY and now 79% of total revenue.
What did Viavi Solutions acquire recently?: Viavi closed the acquisition of Spirent Communications' high-speed Ethernet, network security and channel emulation business from Keysight on October 16, 2025, after losing a 2024 bidding war for all of Spirent. It also closed the $150M Inertial Labs acquisition in Q1 2025.

Timeline

2026-05-05Launched CyberFlood CF1000, a 400G AI-infrastructure security validation appliance
2026-04-29Reported Q3 FY2026 revenue of $406.8M, up 42.8% YoY, non-GAAP EPS $0.27
2026-02-24Launched DCX 700 tier-1 optical loss test set testing 24 fibers simultaneously
2026-01-06Announced hollow-core fiber bidirectional testing validated with three hyperscalers
2025-10-16Closed acquisition of Spirent's HSE, network security and CE business from Keysight
2025-04-22Closed acquisition of Inertial Labs for $150M upfront plus up to $175M contingent
2015-08Viavi Solutions formed as JDS Uniphase split into Viavi and Lumentum Holdings

Revision history

25 July 2026

First assessed. Defensible for now. The text above is fixed as of this date and is not edited afterwards.

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