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29 leading companies with in-house R&D in Plano

Tamtam tracks 29 companies with in-house R&D headquartered in Plano. This list ranks all of them by number of employees on LinkedIn, led by NTT DATA North America, Toyota North America and Siemens Digital Industries Software. Their median headcount is 742. Half of them were founded in 1999 or later.

馃嚭馃嚫 Plano29 companiesUpdated Nov 11, 2026

These Plano-based companies are involved in various technology sectors, with a strong presence in software development, telecommunications, and medical equipment manufacturing. The list includes large corporations like NTT DATA North America, which provides IT consulting and AI solutions, and Toyota North America, known for motor vehicle manufacturing. Siemens Digital Industries Software offers digital transformation tools, while Tyler Technologies specializes in software for government entities.

A notable pattern among these companies is their focus on advanced technological solutions. Many of them, such as Trellix in cybersecurity and Diodes Incorporated in semiconductor manufacturing, are key players in their respective fields, indicating Plano as a hub for diverse R&D activities across both established industries and newer tech ventures.

#CompanyIndustryHeadquarters EmployeesFounded
1
NTT DATA North Americaus.nttdata.com

provides business and technology consulting, data and AI solutions, application development, infrastructure management, and industry-specific services globally

IT Services and IT Consulting 馃嚭馃嚫 Plano 24,414 n/a
2
Toyota North Americatoyota.com

Manufacturing high-quality vehicles while prioritizing people, career growth, and leading innovations in future mobility solutions for everyone.

Motor Vehicle Manufacturing 馃嚭馃嚫 Plano 22,666 1957
3
Siemens Digital Industries Softwaresiemens.com

The company helps organizations digitally transform using Siemens Xcelerator platform, optimizing design, engineering, and manufacturing processes to create sustainable products

Software Development 馃嚭馃嚫 Plano 20,925 n/a
4
Tyler Technologiestylertech.com

Provides integrated software and technology services enabling government entities to operate efficiently, transparently, and connect data across systems.

Software Development 馃嚭馃嚫 Plano 7,873 n/a
5
Siemens PLM Software (inactive)sw.siemens.com

Drives enterprise transformation, enabling digital engineering, manufacturing, electronics design. Solutions create digital twins providing insights, automation for innovation for companies.

Software Development 馃嚭馃嚫 Plano 4,233 n/a
6
Ribbon Communicationsribboncommunications.com

Provides communications software, IP and optical networking solutions for service providers, enterprises, and critical infrastructure with modern, scalable, and secure technologies.

Telecommunications 馃嚭馃嚫 Plano 4,092 n/a
7
Trellixtrellix.com

Delivers intelligence-led cyber resilience for security-conscious organizations. Transforms threat intelligence into high-fidelity detections and automates AI-driven detection and response across diverse environments.

Computer and Network Security 馃嚭馃嚫 Plano 3,827 2022
8
Integer Holdings Corporationinteger.net

Provides contract development and manufacturing for medical devices, focusing on cardiac rhythm, neuromodulation, and cardio/vascular markets. Supplies innovative, high-quality products to medical companies.

Medical Equipment Manufacturing 馃嚭馃嚫 Plano 3,810 1940
9
Hilti North Americahilti.com

Providing innovative tools, fasteners, software, and services to enhance construction speed, safety, and sustainability for professionals.

Construction 馃嚭馃嚫 Plano 3,241 1941
10
Communications & Power Industries (CPI)cpii.com

Global manufacturer of electronic components for communications and defense markets, specializing in innovative technology solutions for commercial and military applications worldwide

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 Plano 1,612 1995
11
ECI Telecomrbbn.com

Global communications software and network solutions provider for service providers, enterprises, and critical infrastructure sectors, offering innovative end-to-end solutions for modernizing networks

Telecommunications 馃嚭馃嚫 Plano 1,513 1961
12
Diodes Incorporateddiodes.com

Global semiconductor manufacturer providing high-quality products to automotive, industrial, computing, consumer electronics, and communications markets, with a focus on application-specific solutions

Semiconductor Manufacturing 馃嚭馃嚫 Plano 1,303 1959
13
Siemens Healthineerssiemens.com

Innovative team of engineers specialized in computer vision technology, focused on developing imaging systems for early cancer detection and breast density assessment

Medical Equipment Manufacturing 馃嚭馃嚫 Plano 1,020 2000
14
Airspan Networksairspan.com

Provider of innovative software and hardware for 5G networks, pioneering in Open RAN solutions for seamless connectivity globally

Telecommunications 馃嚭馃嚫 Plano 770 1992

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15
Argon Medical Devices, Inc.argonmedical.com

Manufacturing specialty medical devices for interventional radiology, vascular surgery, interventional cardiology, and oncology, improving patient outcomes through image-guided procedures.

Medical Equipment Manufacturing 馃嚭馃嚫 Plano 742 1972
16
Polestar Analyticspolestaranalytics.com

Specializing in analytics and AI, this organization helps businesses leverage data for valuable insights through a wide range of services

Business Consulting and Services 馃嚭馃嚫 Plano 693 2012
17
Payoda Technology Incpayoda.com

Digital transformation partner offering technology solutions and services to global businesses with expertise in end-user research, design, engineering, and analytics Delivering scalable software solutions worldwide

IT Services and IT Consulting 馃嚭馃嚫 Plano 663 2005
18
Silverfortsilverfort.com

Provides an end-to-end identity security platform, protecting all identities, human and machine, across on-premise and cloud environments, minimizing attack surfaces.

Computer and Network Security 馃嚭馃嚫 Plano 634 2016
19
GENBANDrbbn.com

A global leader in real-time communications technology, transforming networks to secure IP and cloud-based architectures for highly productive consumer and business communication

Telecommunications 馃嚭馃嚫 Plano 610 1999
20
Imagine Communicationsimaginecommunications.com

The company develops technologies for media companies to deliver content anywhere, anytime, on any device using scalable, software-based solutions

Broadcast Media Production and Distribution 馃嚭馃嚫 Plano 569 n/a
21
Softweb Solutions Inc. - An Avnet Companysoftwebsolutions.com

AI software development, IoT applications, data services, digital transformation, cognitive bots, extended reality, custom apps, enterprise mobility, marketing automation.

IT Services and IT Consulting 馃嚭馃嚫 Plano 420 2006
22
Toyota Connected North Americatoyotaconnected.com

Development of connected automotive products and services enhancing mobility experiences, fostering innovation, and supporting a diverse, inclusive workplace culture.

Software Development 馃嚭馃嚫 Plano 408 2016
23
DZSdzsi.com

A global leader in broadband connectivity and cloud software, specializing in helping service providers deliver optimal subscriber experiences

Telecommunications 馃嚭馃嚫 Plano 287 n/a
24
Tvaranatvarana.com

Specializing in customizing, implementing, and enhancing cloud technology, particularly Salesforce, Netsuite, Amazon, and Heroku, to meet specific business needs

IT Services and IT Consulting 馃嚭馃嚫 Plano 204 2007
25
Telaverge Communicationstelavergecommunications.com

Global provider of communications and technology solutions with strong engineering force in Texas and India, specializing in telecom products and solutions for worldwide operators

Telecommunications 馃嚭馃嚫 Plano 176 n/a
26
KidKraftkidkraft.com

KidKraft crafts award-winning toys and furniture for children worldwide, blending classic play with modern technology to foster imagination and fun

Manufacturing 馃嚭馃嚫 Plano 108 1968
27
TMF Plastic Solutionstmfenterprises.com

Custom injection molding of plastic components and assemblies for consumer goods, durable goods, fitness, food service, communications, and OEM industries.

Plastics Manufacturing 馃嚭馃嚫 Plano 85 2000
28
Argent Associates, Inc.argentassociates.com

A global technology service provider offering cutting-edge solutions, R&D for edge computing, e-commerce platform, and community-focused initiatives for business growth

IT Services and IT Consulting 馃嚭馃嚫 Plano 24 1998
29
Highpoint Design LLChptdesign.com

An established electrical/electronics manufacturer offering quality design and manufacturing services, specializing in industrial applications and advanced touch-based systems

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 Plano 3 2003

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

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