| # | Company | Employees |
|---|---|---|
| 1 |
Rivers State Universityrsu.edu.ng
An educational institution offering a range of programs in science, technology, education, law, management, agriculture, and environmental sciences with a focus on excellence and creativity |
1,664 |
| 2 |
Sundry Foods Limitedsundryfood.com
An integrated food services provider in Nigeria, offering great tasting ready-to-eat food, catering services, and building lasting relationships with customers |
1,142 |
| 3 |
Indoramaindorama.com
Specializing in the production and distribution of fertilizer and chemicals for various industries and agricultural purposes |
1,008 |
| 4 |
Sundry Markets Limitedsundrymarkets.com
An emerging modern grocery retail company operating supermarkets, convenience stores, and online stores offering a wide variety of international and local brands |
938 |
| 5 |
NLNG Shipping and Marine Services Limitednsml.com
A maritime services provider offering crew and fleet management, training, consultancy, and terminal services at the highest industry standards |
696 |
| 6 |
Niger Delta Development Commission (NDDC)nddc.gov.ng
Established in 2000, our mission is to drive rapid, sustainable development in the Niger Delta for economic, social, ecological, and political progress |
688 |
| 7 |
Port Harcourt Electricity Distribution Company
An electricity distribution entity in Port Harcourt, operating privately since November 2013 under the management of 4 Power Consortium |
668 |
| 8 |
Oilserv Limitedoilservltd-ng.com
An Oil & Gas EPCIC specializing in engineering, procurement, construction, installation, and project management for multinational and local companies in Africa |
667 |
| 9 |
Ignatius Ajuru University
Delivering excellence, integrity, and service to clients in a variety of industries with a focus on exceptional customer satisfaction |
627 |
| 10 |
AOS Orwell Limitedaosorwell.com
A leading provider of oilfield services in Nigeria, offering innovative solutions in well construction, instrumentation, and process automation to the oil & gas sector in West Africa |
614 |
| 11 |
Aveon Offshore Limitedaveonoffshore.com
An engineering and fabrication services provider for the oil and gas industry in Nigeria, known for quality, timely delivery, safety, and local content compliance |
504 |
| 12 |
Alcon Nigeria Ltdalcon-nig.com
ALCON Nigeria Limited offers Engineering, Procurement, Installation, and Commissioning services with a workforce of over 3,000 trained professionals |
492 |
| 13 |
University of Port Harcourt Nigeriauniport.edu.ng
Esteemed Nigerian educational institution offering a wide range of academic programs and ranked as one of the top universities in Africa |
486 |
| 14 |
Bourbon Interoil Nigeria Limitedbourbonoffshore.com
Provider of latest generation fleet of crew-boats, including FSIV and Surfers, for oil and gas clients, ensuring safe, reliable, and cost-effective solutions |
427 |
| 15 |
Genesis Group Nigeriagenesisgroupng.com
Nigerian-owned group with interests in hospitality, entertainment, real estate, catering, and snackfoods, providing exceptional products and services for 25 years |
417 |
| 16 |
Port Harcourt Electricity Distribution Plcphed.com.ng
An electrical and electronic manufacturing organization located in Port Harcourt, Rivers, Nigeria, specializing in power distribution services |
374 |
| 17 |
Dover Engineering Limiteddoverengineering.com
Specializing in designing and consulting services provided by engineers, delivering innovative solutions for various projects and industries |
354 |
| 18 |
Capital City Development Ltd.capitalcitydev.com
Providing ethical and affordable housing solutions for personal, corporate and governmental needs in Nigeria |
323 |
| 19 |
CANDIX ENGINEERING NIGERIA LIMITEDcandixnigeria.com
A leading engineering services provider in Nigeria, offering a wide range of services including instrumentation, electrical, electronics, ICT, civil/structural, and mechanical projects across Africa |
185 |
| 20 |
Income Electrix Limitedincomeelectrix.com
An integrated power company in Nigeria with assets across the power value chain, known for being the first indigenous ISO 9001-2008 certified |
182 |
| 21 |
TEDx University of PortHarcourt | What Next?ted.com
The team is dedicated to empowering the youth through innovative ideas and powerful conversations to inspire creativity and progress |
178 |
| 22 |
MG Vowgas Groupmgvowgasgroup.com.ng
Specializes in engineering, procurement, construction, fabrication, installation, commissioning, and marine logistics services |
177 |
| 23 |
Topline Limitedtoplinelimited.com
Specializing in pipeline and process engineering services for the oil and gas industry in West Africa, including construction, inspection, maintenance, and pumping services |
171 |
| 24 |
Laser Engineering and Resources Consultants Limitedlaser-ng.com
Petroleum engineering consultancy specializing in well test services, surface and subsurface studies, geological studies, and integrated petroleum engineering services |
167 |
| 25 |
Stockgap Fuels Limitedstockgapfuels.com
A key player in the Nigerian oil and gas sector, focused on providing access to energy through storage and distribution of petroleum products and Liquefied Natural Gas |
163 |
| 26 |
Kohasa Engineering Company Limitedkohasaeng.com
Kohasa Engineering specializes in oil and energy services, operating from Port Harcourt, Nigeria's Trans Amadi industrial layout |
162 |
| 27 |
Rivers State Primary Health Care Management Boardrsphcmb.rv.gov.ng
Manages over 346 primary health facilities in Rivers State, providing accessible and quality promotive, preventive, curative, and rehabilitative care services |
161 |
| 28 |
Pm4success Internationalpm4successintl.com
A team of experts provides training and consulting services to help individuals and organizations improve performance, productivity, and manage change effectively |
156 |
| 29 |
TAMROSEtamrose.com
Specializing in procurement, engineering services,and maritime operations within the Nigerian Oil and Gas industry with a focus on customer-centricity and fleet expansion |
155 |
| 30 |
Uniterm Nigeria Limitedunitermintl.com
A leading provider of expertise, resources, and technical excellence in the Nigerian Oil and Gas industry Follow us on social media for updates |
150 |
| 31 |
Primeport Logistics Limitedprimeportlogistics.com
Licensed clearing agent specializing in door-to-door cargo services in Port Harcourt, Nigeria, aiming to turn the local airport into a regional cargo hub |
149 |
| 32 |
Midland Microfinance Bank Limitedmidlandmfb.com
A financial institution offering a variety of services to clients ranging from low-end entrepreneurs to high-net-worth individuals, including the underbanked |
43 |
| 33 |
Kusnapkusnap.com
A free platform connecting buyers and sellers nationwide, offering an easy snap-to-sell and chat-to-buy approach with AI customization and various features for all products |
7 |
| 34 |
Alpha-Tec Concept Nigeria Limitedalphatecconcept.com
A technology company in Nigeria offering sales, consulting, training, software development, and telecommunications services with a focus on client satisfaction |
5 |
| 35 |
Ecco farmeccofarm.com
Empowering women through unique and motivational sportswear, designed to spark excitement and confidence in their daily active lifestyles Ethical, high-quality products |
5 |
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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 Oct 24, 2026.