PREFORMED LINE PRODUCTS CO (PLPC) Business

Item 1. Business

Background

Preformed Line Products Company together with its subsidiaries (the “Company” or “PLP”) is an international designer and manufacturer of products and systems employed in the construction and maintenance of overhead, ground-mounted and underground networks for energy, telecommunication, cable, data communication and other similar industries. The Company’s primary products support, protect, connect, terminate and secure cables and wires. The Company provides formed wire solutions, connectors, fiber optic and copper splice closures, solar hardware mounting applications, and electric vehicle charging station foundations. The Company’s goal is to continue to achieve profitable growth as a leader in the research, innovation, development, manufacture and marketing of technically advanced products and services primarily related to the energy and communications markets.

The Company serves a worldwide market through strategically located domestic and international manufacturing facilities. Each of the Company’s domestic and international manufacturing facilities have obtained or are actively seeking an International Organization of Standardization (“ISO”) 9001:2015 Certified Management System Certificate. The ISO 9001:2015 certified management system is a globally recognized certified quality standard for manufacturing and assists the Company in marketing its products throughout the world. The Company’s customers include public and private energy utilities and communication companies, cable operators, governmental agencies, contractors and subcontractors, distributors and value-added resellers. The Company is not dependent on a single customer or small group of customers. The Company has one customer accounting for 10.7% of the Company's consolidated revenues.

The Company’s products include:

•Energy Products

•Communications Products

•Special Industries Products

–Solar Framing and Electric Vehicle Products

–Inspection Services

Energy Products are used for supporting, protecting, terminating and splicing transmission and distribution lines as well as bolted, welded, and compressed connectors for substations. PLP offers a full array of products for OPGW (Optical Ground Wire) and ADSS (All Dielectric Self Supporting) fiber optic cables, which are commonly used to monitor and control power networks. Formed wire products are the mainstay of PLP’s product offering and such products enjoy an almost universal acceptance in the Company’s markets. Formed wire products are based on the principle of forming a variety of stiff wire materials into a helical (spiral) shape. The advantages of using the Company’s helical formed wire products are that they are economical, dependable and easy to use. Additional energy product offerings include a wide array of string hardware products, polymer insulators, wildlife protection, substation fittings and motion control devices like spacer dampers. Energy products were approximately 71%, 71%, and 64% of the Company’s revenues in 2025, 2024 and 2023, respectively.

Communications Products include rugged outside plant (OSP) closures to protect and support wireline and wireless networks, such as fiber optic cable or copper cable, from moisture, environmental hazards and other potential contaminants. The precision engineered OSP closures support many FTTx (Fiber-to-the-X) and 4G/5G applications and are deployed at various points in the network—deadend, middle-mile and last-mile—but primarily are used in modern FTTH (Fiber-to-the-Home) applications. In addition to the OSP closures, the Company supplies demarcation related products that include wall boxes, pre-terminated cabinets, wall plates and passive components that are typically deployed at residences, businesses or MDUs (Multi-dwelling units). The Company supplies formed wire products, utility pole line hardware, motion control products and cable storage devices used to hold, support, protect and terminate various cable types that are used to transfer voice, video or data signals. These communications products serve all segments of the telecommunications industry including but not limited to network operators, broadband service providers, wireless internet service providers, enterprise networks, educational institutions, and electric utilities deploying fiber optics. Communications products were approximately 22%, 22%, and 29% of the Company’s revenues in 2025, 2024 and 2023, respectively.

Special Industries Products include hardware assemblies, pole line hardware, plastic products, cable dynamics/vibration solutions, interior/exterior connectors, tools, and urethane solutions. They are used by energy, renewable energy, communications, cable and other industries for specialized applications. Also included in Special Industries is the Inspection Services group which provides safe and reliable drone inspection services for utility assets, including transmission and distribution power lines, substations, generation facilities, and communications assets as well as solar framing and electric vehicle (EV) offerings which include mounting solutions for photovoltaic solar applications, including commercial, industrial, utility, and residential applications as well as pre-

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fabricated, precision-engineered EV charging station foundations. Special Industries products were approximately 7%, 7%, and 7% of the Company’s revenues in 2025, 2024 and 2023, respectively.

International Operations

The international operations of the Company are similar to its domestic (“PLP-USA”) business. The Company manufactures similar types of products in its international plants as are sold domestically, sells to similar types of customers and faces similar types of competition (and in some cases, the same competitors). Sources of supply of raw materials are not significantly different internationally. See Note 15 in the Notes to Consolidated Financial Statements for information and financial data relating to the Company’s international operations that represent reportable segments.

Sales and Marketing

The Company markets its products through a direct sales force and manufacturing representatives. The direct sales force is employed by the Company and works with manufacturers’ representatives, as well as key direct accounts and distributors who also buy and resell the Company’s products. The manufacturers' representatives are independent organizations that represent the Company as well as other complementary product lines. These organizations are paid a commission based on the sales amount they generate.

Research and Development

The Company is committed to providing technical leadership through scientific research and product development in order to continue to expand the Company’s position as a supplier to the communications and power industries. Research is conducted on a continuous basis using internal experience in conjunction with outside professional expertise to develop state-of-the-art materials for several of the Company’s products. These products capitalize on cost-efficiency while offering exacting mechanical performance that meets or exceeds industry standards. The Company’s research and development activities have resulted in numerous patents being issued to the Company (see “Patents and Trademarks” below).

To understand the performance of its products, and enhance the goals of ensuring quality and exceeding customer expectations, the Company has a 38,000-square-foot Research and Engineering Center located at its corporate headquarters in Mayfield Village, Ohio. Using the Research and Engineering Center, engineers and technicians simulate a wide range of external conditions encountered by the Company’s products to ensure quality, durability and performance. The work performed in the Research and Engineering Center includes advanced studies and experimentation with various forms of vibration and environmental changes.

The Research and Engineering Center is one of the most sophisticated in the world in its specialized field. The Research and Engineering Center also has an advanced prototyping technology machine on-site to develop models of new designs where intricate part details are studied prior to the construction of expensive production tooling. Today, the Company’s reputation for vibration testing, tensile testing, fiber optic cable testing, environmental testing, field vibration monitoring and third-party contract testing is a competitive advantage. In addition to testing, the work performed at the Company’s Research and Development Center continues to fuel product development efforts. The Company’s position in the industry is further reinforced by its long-standing leadership role in many key international technical organizations which are charged with the responsibility of establishing industry-wide specifications and performance criteria, including IEEE (Institute of Electrical and Electronics Engineers), CIGRE (Conseil Internationale des Grands Reseaux Electriques a Haute Tension), and IEC (International Electromechanical Commission). Research and development costs are expensed as incurred.

Patents and Trademarks

The Company applies for patents in the U.S. and other countries, as appropriate, to protect its significant patentable developments. As of December 31, 2025, the Company had in force 75 U.S. patents and 104 international patents in 21 countries and had 38 pending U.S. patent applications and 97 pending international applications. While such domestic and international patents expire from time to time, the Company continues to apply for and obtain patent protection on a regular basis. Patents held by the Company in the aggregate are of material importance in the operation of the Company’s business. The Company, however, does not believe that any single patent, or group of related patents, is essential to the Company’s business as a whole or to any of its businesses. Additionally, the Company owns and uses a substantial body of proprietary information and numerous trademarks. The Company relies on nondisclosure agreements to protect trade secrets and other proprietary data and technology. As of December 31, 2025, the Company had obtained U.S. registration on 35 trademarks, and no trademark applications remained pending. International registrations amounted to 242 registrations in 47 countries, with 4 pending international registrations.

U.S. patents are issued for terms of 20 years beginning with the date of filing of the patent application. Patents issued by international countries generally expire 20 years after filing. U.S. and international patents are not renewable after expiration of their initial term. U.S. and international trademarks are generally perpetual, renewable in 10-year increments upon a showing of continued

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use. To the knowledge of management, the Company is not subject to any significant allegation or charges of infringement of intellectual property rights by any organization.

In the normal course of business, the Company occasionally makes and receives inquiries with regard to possible patent and trademark infringement. The extent of such inquiries from third parties has been limited generally to verbal remarks or letters to Company representatives. The Company believes that it is unlikely that the outcome of these inquiries will have a material adverse effect on the Company’s financial position.

Competition

All of the markets that the Company serves are highly competitive. In each market, the principal methods of competition are price, performance, and service. The Company believes, however, that several factors (described below) provide the Company with a competitive advantage.

•The Company has a strong and stable workforce. This consistent and continuous knowledge base has afforded the Company the ability to provide superior service to the Company’s customers and representatives.

•The Company’s Research and Engineering Center and the engineering departments at the Company’s subsidiary operations around the world maintain a strong technical support function to develop unique solutions to customer demands.

•The Company is vertically integrated both in manufacturing and distribution and is continually upgrading equipment and processes.

•The Company is sensitive to the marketplace and provides an extra measure of service in cases of emergency, storm damage and other supply delivery situations. This high level of customer service and customer responsiveness is a hallmark of the Company.

•The Company’s domestic and international sales and manufacturing locations ensure close support and proximity to customers worldwide.

Domestically, there are several competitors for formed wire products. Although it has other competitors in many of the countries where it has operations, the Company has leveraged its expertise and is very strong in the global market. The Company believes that it is the world’s largest manufacturer of formed wire products for energy and communications markets. However, the Company’s formed wire products compete against other pole line hardware products manufactured by other companies.

The OSP closure market is one of the most competitive product areas for the Company, with a number of primary competitors and several smaller niche competitors that compete at all levels in the marketplace. The Company believes that it is one of four leading suppliers of OSP closures.

Sources and Availability of Raw Materials

The principal raw materials used by the Company are galvanized wire, stainless steel, aluminum covered steel wire, aluminum rod, plastic resins, glass-filled plastic compounds, neoprene rubbers and aluminum castings. The Company also uses certain other materials such as fasteners, packaging materials and fiber communications devices. The Company believes that it has adequate sources of supply for the raw materials used in its manufacturing processes, and it regularly attempts to develop and maintain sources of supply in order to extend availability and encourage competitive pricing of these products.

Most plastic resins are purchased under contracts to stabilize costs and improve delivery performance and are available from a number of reliable suppliers. Wire and aluminum rods are purchased in standard stock diameters and coils under contracts from a number of reliable suppliers. Contracts have firm prices except for fluctuations of base metals and petroleum prices, which result in surcharges when global demand is greater than the available supply.

The Company also relies on certain other manufacturers to supply products that complement the Company’s product lines, such as ferrous castings, fiber optic cable and connectors and various metal racks. The Company believes there are multiple sources of supply for these products.

The Company has expanded its supply chain but, in limited circumstances, does rely on sole source manufacturers for certain raw materials. This reliance presents a risk that existing suppliers could go out of business or be unable to meet customer demand. However, there are other potential sources available for these materials, and the Company believes that it could relocate the tooling and processes to other manufacturers if necessary.

During the twelve months ending December 31, 2025, the high tariff environment significantly impacted the costs of raw material imports, especially steel and aluminum. Given the current macro-economic and political climates, the February 2026 U.S. Supreme Court ruling that set aside unlawfully imposed tariffs (but not tariffs on steel and aluminum) and the further tariff actions that

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followed, it is difficult to predict the scope, duration, and application of current and future tariffs and other trade measures. As new tariffs are enacted, additional trade restrictions are imposed or inflationary pressures emerge, it may require further price adjustments to maintain profit margin and any price increases may have a negative effect on demand. Further, to the extent amounts are refunded for previously paid tariffs that impacted the Company, it is unknown how such refunds would be processed or the timeline for doing so and whether any such amounts would be recovered by the Company.

Backlog Orders

Order backlog was approximately $232.8 million at the end of 2025 and $191.0 million at the end of 2024. All customer orders entered are firm at the time of entry. Substantially all of the backlog existing at December 31, 2025 is expected to be shipped to customers in 2026.

Seasonality

The Company markets products that are used by utility maintenance and construction crews worldwide. The products are marketed through distributors and directly to end users, who maintain stock to ensure adequate supply for their customers or construction crews. As a result, the Company does not have a wide variation in sales from quarter to quarter.

People, Planet and Principles

The Company is subject to extensive and changing federal, state, and local environmental laws, including laws and regulations that (i) relate to air and water quality, (ii) impose limitations on the discharge of pollutants into the environment, (iii) establish standards for the treatment, storage and disposal of toxic and hazardous waste, and (iv) require proper storage, handling, packaging, labeling, and transporting of products and components classified as hazardous materials. Stringent fines and penalties may be imposed for noncompliance with these environmental laws. In addition, environmental laws could impose liability for costs associated with investigating and remediating contamination at the Company’s facilities or at third-party facilities at which the Company has arranged for the disposal treatment of hazardous materials.

The Company believes it is in compliance in all material respects with all applicable environmental laws and the Company is not aware of any noncompliance or obligation to investigate or remediate contamination that could reasonably be expected to result in a material liability. The Company does not expect to make any material capital expenditures during 2026 for environmental control facilities. The environmental laws continue to be amended and revised, and compliance with future additional environmental requirements could necessitate capital outlays; however, the Company does not believe that these expenditures will ultimately result in a material adverse effect on its financial position or results of operations. Further, regulators in the U.S. and around the world, including the E.U., have been focused on proposing and/or implementing regulations to require certain disclosures related to climate change. If these regulations are ultimately adopted and become applicable to the Company, it could significantly increase the Company's compliance burdens and associated regulatory costs and complexity. The Company cannot predict the precise effect such enacted regulations or future requirements, if they become applicable to the Company, would have on the Company, and continues to monitor proposed and pending regulations. The Company believes that such regulations would affect the industry as a whole.

Weather events may impact the Company’s business by increasing operating costs due to damage to its facilities and distribution systems and disruptions to its manufacturing processes due to the increased frequency and severity of storms, floods, fires, fog, mist, freezing conditions, sea-level rise and other climate-related events. As discussed above, climate related regulatory activity may adversely affect the Company’s business and financial results by requiring the Company to reduce its emissions, make capital investments to modernize certain aspects of its operations, purchase carbon offsets, or otherwise pay for its emissions. The Company seeks to address these potential risks in its business continuity planning; however, such events could make it difficult for the Company to deliver products and services to its customers and cause it to incur substantial expense.

The Company is committed to supporting people and planet initiatives and being a responsible contributor to the environment, its employees, and the communities in which it operates. The Company’s locations are focused on efforts to reduce its waste, water and energy consumption through the implementation of such programs as pollution prevention, recycling waste materials in both manufacturing and office facilities, reducing solid waste disposal, reducing air emissions, and implementing alternative energy sources. Some locations have also achieved the ISO-14001: Environmental Management Systems Certification.

In addition to monitoring and managing compliance with environmental regulations, the Company is also committed to being a responsible steward of the environment. For example, the Company is committed to protecting wildlife by working with utility companies to design and manufacture wildlife protection products that aid in reducing wildlife mortalities from interaction with electric power distribution lines, structures, and equipment. Its Wildlife Protection line of products includes the BIRD-FLIGHT™ Diverter, RAPTOR PROTECTOR™ Platform and a Squirrel Deterrent System. The Company is also committed to partnering with its customers to develop innovative products, technologies, and services that meet their needs while mitigating risk to the environment and natural resources. This is evident through the Company’s commitment to supporting fiber-optic connectivity, which is more energy efficient than copper cable.

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Additionally, the Company's product offerings bolster grid reliability and efficiency, increase resilience to climate events and enable transitions to new sources of energy and upgrade aging infrastructure. The Company also quickly provides repair products to customers in the event of emergencies or natural disasters such as hurricanes, tornadoes, earthquakes, floods or ice storms. PLP is a trusted supplier when natural disasters occur.

The Company maintains a tradition of supporting numerous charitable organizations and promoting community involvement. It makes donations to various organizations and encourages employees to do the same by offering matching donations. The Company shares its successes with the communities in which it operates at both a corporate and local level. Donations and investments in enhancing the lives of the people within the communities it impacts are an integral part of who the Company is and how it intends to represent its values.

Human Capital

At December 31, 2025, the Company had 3,734 employees, the overwhelming majority of which are full-time employees. Approximately 24% of the Company’s employees are located in the U.S.

The Company views its employees and culture as keys to its success and believes that its employees are its greatest asset. The Company aims to attract and retain employees who will be empowered to have the freedom to make decisions and take actions in the best interest of the Company, while being recognized and accountable for those decisions and actions. The Company focuses on innovation, safety and engagement to develop the best talent.

The Company’s goal is to create a work environment that enables employees to perform in an environment where they feel respected and valued. As a global company with employees in many countries, the Company values its broad diversity of cultures, ethnicities, races, languages, religions, sexual and gender orientations and a diverse, open and inclusive work environment. Workplace satisfaction is key to attracting and retaining employees. The Company has built a culture where integrity and honesty guide the decision-making process, while promoting a culture of learning and talent development through tuition reimbursement, training, wellness programs, flexible benefits, and competitive compensation. The Company has also adopted several policies, including the Code of Conduct, which stresses the importance of adhering to laws and contributing to society.

The Company has always had health and safety as a core value and promotes a culture that engages and empowers its employees to take responsibility for the health and safety of themselves and their co-workers.

For more information on the risks related to the Company’s human capital resources, see Item 1A – Risk Factors.

Available Information

The Company maintains an Internet site at http://www.plp.com, on which the Company makes available, free of charge, the annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and any amendments to those reports, as soon as reasonably practicable after the Company electronically files such material with, or furnishes it to, the SEC. The Company’s SEC reports can be accessed through the investor relations section of its Internet site. The information found on the Company’s Internet site is not part of this or any other report that is filed or furnished to the SEC.

The public may read and copy any materials the Company files with or furnishes to the SEC at the SEC’s Public Reference Room at 100 F. Street, NE., Washington, DC 20549. Information on the operation of the Public Reference Room is available by calling the SEC at 1-800-SEC-0330. In addition, the SEC maintains an Internet site that contains reports, proxy and information statements, and other information filed with the SEC by electronic filers. The SEC’s Internet site is http://www.sec.gov. The Company also has a link from its Internet site to the SEC’s Internet site. This link can be found on the investor relations page of the Company’s Internet site.