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Operating Segments and Geographic Information
 12 Months Ended
Jun. 28, 2025
Segment Reporting [Abstract]  
Operating Segments and Geographic Information
Note 19. Operating Segments and Geographic Information
The Company evaluates its operating segments in accordance with the authoritative guidance on segment reporting. The Company’s Chief Executive Officer as the Company’s CODM uses operating segment financial information to evaluate segment performance and to allocate resources.
The Company’s operating and reportable segments are:
(i) Network and Service Enablement:
NSE provides an integrated portfolio of testing, monitoring, assurance and security solutions to help build, maintain, and optimize telecom and datacom networks. Our solutions address lab and production environments, network management, service assurance and AIOps for any kind of network, including wireless, wireline, cloud, satellite, public safety, military and critical infrastructure. NSE also offers a range of product support and professional services such as repair, calibration, software support and technical assistance for its products.
(ii) Optical Security and Performance Products:
OSP leverages its core optical coating technologies and volume manufacturing capability to design, manufacture, and sell technologies for the anti-counterfeiting, 3D sensing, government and aerospace, automotive and industrial markets.
Effective March 30, 2025, the Company realigned its segment reporting structure. As a result, the company’s Network Enablement (NE) and Service Enablement (SE) business activities are now reported as a single operating and reportable segment, NSE. Recent acquisitions have reduced the SE segment revenue as a percentage of total VIAVI revenue. In addition, NE and SE are managed under common leadership, share many of the same customers and suppliers and operating expenses associated with the NSE business are not exclusively allocated to either NE or SE. The Company has applied this change retrospectively in the disclosures herein.
Segment Reporting
The CODM manages the Company in two broad business categories: NSE and OSP. The CODM evaluates segment performance of the NSE and OSP business based on segment operating margins. The CODM uses segment operating margin to make budgeting and forecasting decisions and to assess the performance of our segments, primarily by monitoring actual results versus the prior year, the annual budget and forecasted results. In addition, the CODM reviews inventory levels by segment. The Company allocates corporate-level operating expenses to its segment results, except for certain non-core operating and non-operating activities as discussed below.
The Company does not allocate stock-based compensation, acquisition and integrated related charges, amortization of acquisition related intangibles, amortization of acquisition related inventory step-up, legal settlements, restructuring, changes in fair value of contingent consideration liabilities, non-operating income and expenses, or other charges unrelated to core operating performance to its segments because management does not include this information in its measurement of the performance of the operating segments. These items are presented as “Unallocated other expenses” in the table below. Additionally, the Company does not specifically identify and allocate all assets by operating segment.
Information on the Company’s reportable segments is as follows (in millions):
Year Ended June 28, 2025
 Network and
Service
Enablement		Optical Security and Performance ProductsTotal
Product revenue$604.3 $307.7 $912.0 
Service revenue172.3 — 172.3 
Net revenue776.6 307.7 1,084.3 
Cost of revenues288.7 144.2 
Research and development179.3 17.3 
Selling, general and administrative165.7 23.8 
Other segment items(1)
101.3 10.1 
Total operating expense446.3 51.2 
Segment operating income$41.6 $112.3 $153.9 
Segment operating margin5.4 %36.5 %
Unallocated other expenses(96.4)
Interest and other income, net11.1 
Interest expense(30.0)
Income before income taxes and equity investment earnings$38.6 
Inventories, net$74.4 $43.5 $117.9 
Assets not allocated to segments1,875.9 
Total assets$1,993.8 
Year Ended June 29, 2024
Network and
Service
Enablement		Optical Security and Performance ProductsTotal
Product revenue$536.4 $298.4 $834.8 
Service revenue165.6 — 165.6 
Net revenue702.0 298.4 1,000.4 
Cost of revenues262.4 143.5 
Research and development173.5 16.5 
Selling, general and administrative160.7 23.2 
Other segment items(1)
97.4 8.2 
Total operating expense431.6 47.9 
Segment operating income$8.0 $107.0 $115.0 
Segment operating margin1.1 %35.9 %
Unallocated other expenses(94.2)
Interest and other income, net21.7 
Interest expense(30.9)
Income before income taxes and equity investment earnings$11.6 
Inventories, net$53.1 $43.4 $96.5 
Assets not allocated to segments1,639.8 
Total assets$1,736.3 
Year Ended July 1, 2023
 Network and
Service
Enablement		Optical Security and Performance ProductsTotal
Product revenue$631.3 $304.8 $936.1 
Service revenue169.9 0.1 170.0 
Net revenue801.2 304.9 1,106.1 
Cost of revenues291.0 146.3 
Research and development178.6 15.0 
Selling, general and administrative167.8 24.1 
Other segment items(1)
102.6 8.2 
Total operating expense449.0 47.3 
Segment operating income$61.2 $111.3 $172.5 
Segment operating margin7.6 %36.5 %
Unallocated other expenses(90.1)
Loss on convertible note modification(2.2)
Interest and other income, net7.6 
Interest expense(27.1)
Income before income taxes and equity investment earnings$60.7 
Inventories, net$67.9 $48.2 $116.1 
Assets not allocated to segments1,734.4 
Total assets$1,850.5 
(1)Other segment items represents allocation of corporate level operating expenses.
The Company operates primarily in three geographic regions: Americas, Asia-Pacific, and Europe, Middle East and Africa (EMEA). Net revenue is assigned to the geographic region and country where the Company’s product is initially shipped. For example, certain customers may request shipment of the Company’s product to a contract manufacturer in one country, which may differ from the location of their end customers.
The following table presents net revenue by the three geographic regions in which the Company operates and net revenue from countries that exceeded 10% of the Company’s total net revenue for the years ended June 28, 2025, June 29, 2024 and July 1, 2023 (in millions):
 Years Ended
 June 28, 2025June 29, 2024July 1, 2023
Product RevenueService RevenueTotalProduct RevenueService RevenueTotalProduct RevenueService RevenueTotal
Americas:
United States$296.7 $59.3 $356.0 $265.0 $60.4 $325.4 $303.5 $59.4 $362.9 
Other Americas51.2 18.0 69.2 50.3 15.0 65.3 60.3 14.9 75.2 
Total Americas$347.9 $77.3 $425.2 $315.3 $75.4 $390.7 $363.8 $74.3 $438.1 
Asia-Pacific:
Greater China$209.1 $6.0 $215.1 $188.1 $5.9 $194.0 $203.5 $7.4 $210.9 
Other Asia-Pacific136.0 28.5 164.5 126.5 26.0 152.5 140.2 26.4 166.6 
Total Asia-Pacific$345.1 $34.5 $379.6 $314.6 $31.9 $346.5 $343.7 $33.8 $377.5 
EMEA:$219.0 $60.5 $279.5 $204.9 $58.3 $263.2 $228.6 $61.9 $290.5 
Total net revenue$912.0 $172.3 $1,084.3 $834.8 $165.6 $1,000.4 $936.1 $170.0 $1,106.1 
One customer of the Company in the OSP segment generated $166.7 million, $154.1 million and $157.7 million of net revenue, which represented more than 10% of total net revenue, during fiscal 2025, 2024 and 2023, respectively.
Property, plant and equipment, net and Operating ROU assets, net were identified based on the operations in the corresponding geographic areas (in millions):
June 28, 2025June 29, 2024
United States$181.2 $178.8 
Other Americas2.6 3.4 
Greater China23.6 28.8 
Other Asia-Pacific8.9 8.6 
United Kingdom23.3 20.8 
Other EMEA26.4 23.6 
Total property, plant and equipment, net and Operating ROU assets, net$266.0 $264.0