These Croatian companies are critical infrastructure operators, primarily large groups in the financial, energy, and telecommunications sectors. Many of them are established entities, with several founded in the 20th century. For instance, HEP, founded in 1884, is the national electricity provider, and Zagrebačka banka, established in 1914, offers banking services across Europe. Hrvatski Telekom is a leading telecommunications company, while INA Grupa is involved in oil and gas exploration and distribution. Croatia osiguranje d.d. is a major insurance provider, and A1 Hrvatska d.o.o. offers digital solutions. The list also includes large healthcare providers like University Hospital Centre Zagreb.
A notable pattern among these companies is their strong concentration in the capital city. Almost all of the largest critical infrastructure operators have their headquarters in Zagreb, with only a few exceptions like Erste&Steiermärkische Bank d.d. in Rijeka and OTP banka Hrvatska in Split. This indicates a centralized hub for critical infrastructure management within Croatia.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 4,540 | ||||
| 2 |
Hrvatski Telekomhrvatskitelekom.hr
Leading Croatian telecommunications company offering fixed, mobile, internet, and international communication services with focus on innovation and customer satisfaction. |
2,426 | |||
| 3 |
Zagrebačka bankazaba.hr
Empowering community development and unlocking individual and collective potential across Europe through a pan-European banking network focused on integrity and responsibility |
2,063 | |||
| 4 | 2,058 | ||||
| 5 |
Privredna banka Zagreb d. d.pbz.hr
A leading financial institution offering a wide range of banking services to individuals and businesses, with a strong international presence |
1,644 | |||
| 6 |
Croatia osiguranje d.d.crosig.hr
Leading insurance provider in Croatia offering various types of insurance, supporting national economy, embracing social responsibility, and focusing on innovative products and client satisfaction |
1,410 | |||
| 7 |
A1 Hrvatska d.o.o.a1.hr
Digital solutions provider in Central and Eastern Europe, offering innovative services and communications solutions to simplify and enhance customer experiences |
1,296 | |||
| 8 |
Erste&Steiermärkische Bank d.d. (Erste Bank Croatia)erstebank.hr
A leading bank in the region, part of a large international financial group, offering innovative financial services and products to over 900,000 clients |
1,283 | |||
| 9 |
University Hospital Centre Zagreb, Croatiakbc-zagreb.hr
Leader in medical procedures and diagnostic methods, offering top-quality therapeutic procedures Operates 50+ referral centers of excellence, introducing innovative treatments like gamma knife radiosurgery and laparoscopic surgery |
1,201 | |||
| 10 |
OTP banka Hrvatskaotpbanka.hr
A green, innovative bank focusing on new technologies, quality financial products, and supporting clients in achieving their personal and business goals |
1,095 | |||
| 11 |
Hrvatska poštanska banka, dioničko društvohpb.hr
A leading Croatian financial institution with a focus on knowledge, innovation, and community responsibility, serving a large client base across the country |
912 | |||
| 12 |
Financijska agencija - Finafina.hr
Leading Croatian provider of financial and electronic services, operating on a market principle, collaborating with banks, institutions, and businesses on various projects nationwide |
903 | |||
| 13 |
Raiffeisenbank Hrvatskarba.hr
A financial institution offering simple, fast, and professional financing and asset management services while striving to positively impact society and the environment |
894 | |||
| 14 |
Croatia Airlinescroatiaairlines.com
National air carrier operating domestic and international flights with a focus on safety, service quality, promoting Croatian culture and tourism Offering inflight services and maintaining highest safety standards |
790 | |||
| 15 |
Addiko Bank Hrvatskaaddiko.hr
Focused on delivering value through basic banking products, prioritizing quality over quantity Simplifying processes, providing clear communication, and personalized service for a positive client experience |
763 | |||
| 16 |
Hrvatska poštaposta.hr
A leading provider of logistics and postal services in Croatia, dedicated to meeting present and future customer needs with high quality services |
721 | |||
| 17 |
Sestre milosrdnice University Hospital Centerkbcsm.hr
A leading healthcare institution in Croatia, offering a wide range of medical services, scientific activities, and hosting educational facilities |
685 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 18 |
Croatian National Bankhnb.hr
A central bank part of the Eurosyste, responsible for maintaining price stability and financial system stability, and participates in the EU monetary policy implementation |
642 | |||
| 19 |
Telemach Hrvatskatelemach.hr
A leading provider of telecommunications and media services in Southeast Europe, offering top-notch customer value, cutting-edge technology, and community engagement |
592 | |||
| 20 |
KBC Splitkbsplit.hr
A leading hospital center in Croatia with three locations, providing specialized medical care, inpatient services, and medical research activities |
582 | |||
| 21 |
VIPnet d.o.o.a1.hr
Leader in Croatian telecom, offering comprehensive 5-play services with cutting-edge technologies Part of global telecom groups with focus on customer satisfaction and innovation |
563 | |||
| 22 |
Hrvatski zavod za mirovinsko osiguranje (HZMO) - Croatian Pension Insurance Institutemirovinsko.hr
A public institution in Croatia implementing pension insurance based on generational solidarity, ensuring legality, timeliness, and quality of service through modern technology |
490 | |||
| 23 |
Clinical hospital Osijekkbco.hr
The public hospital in eastern Croatia offers a wide range of medical services including surgery, internal medicine, pediatrics, gynecology, oncology, and neurology |
461 | |||
| 24 |
Zuger Kantonsspitalzgks.ch
A healthcare institution in Zug and surrounding regions with over 1,100 employees treating over 11,500 inpatients and 50,000 outpatients annually Specializes in various medical disciplines |
390 | |||
| 25 |
Zagrebački holding d.o.o.zgh.hr
A diversified group specializing in gas distribution, waste management, water services, road maintenance, property management, parking services, pharmaceuticals, and infrastructure development |
386 | |||
| 26 |
Sberbank d.d. Croatiasberbank.hr
Leading financial institution in Russia with a strong presence in Central and Eastern Europe, offering a wide range of banking services to individual and corporate clients |
363 | |||
| 27 |
Croatia Controlcrocontrol.hr
CCL provides air navigation services in Croatia, ensuring air traffic safety and compliance with international regulations and standards |
349 | |||
| 28 |
Wiener osiguranje Vienna Insurance Group d.d.wiener.hr
A leading insurance provider in Croatia, offering a wide range of services through a strong sales network and dedicated employees |
274 | |||
| 29 |
HOPS Croatian Transmission System Operator Plc.hops.hr
Provider of electricity transmission and maintenance services in Croatia, focused on operating and expanding the national transmission network for secure and cost-effective energy supply |
270 | |||
| 30 |
KentBank d.d.kentbank.hr
A boutique bank in Croatia focusing on retail and SME clients, offering advanced digital banking services and a unique networking concept |
190 | |||
| 31 | 187 | ||||
| 32 |
Podravska bankapoba.hr
An established bank in Croatia offering modern financial services, personalized banking solutions, and a wide range of financial products to customers and businesses |
93 | |||
| 33 |
Raiffeisen mirovinski fondovirmf.hr
A financial institution managing mandatory and voluntary pension funds, aiming to provide the best service for members and ensure a dignified retirement in the future |
37 | |||
| 34 |
GPP d.o.o.web.gpp-osijek.com
The company provides public city transportation services with full IT support, including vehicle and passenger tracking, online tools, and marketing services |
11 | |||
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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 12, 2026.
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