# 34 leading critical infrastructure operators in Croatia

Tamtam tracks 34 critical infrastructure operators headquartered in Croatia. This list ranks all of them by number of employees on LinkedIn, led by INA Grupa, Hrvatski Telekom and Zagrebačka banka. Their median headcount is 685. Half of them were founded in 1990 or later. The most common headquarters are Zagreb (25).

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.

🇭🇷 Croatia · 34 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [INA Grupa](https://www.tamtam.ai/c/ina-grupa) (ina.hr)<br>Oil and gas exploration, production, refining, distribution, and operates a regional network of service stations in Croatia and neighboring countries. | Oil and Gas | 🇭🇷 Zagreb | 4,540 | 1964 |
| 2 | [Hrvatski Telekom](https://www.tamtam.ai/c/hrvatski-telekom) (hrvatskitelekom.hr)<br>Leading Croatian telecommunications company offering fixed, mobile, internet, and international communication services with focus on innovation and customer satisfaction. | Telecommunications | 🇭🇷 Zagreb | 2,426 |  |
| 3 | [Zagrebačka banka](https://www.tamtam.ai/c/zagrebacka-banka) (zaba.hr)<br>Empowering community development and unlocking individual and collective potential across Europe through a pan-European banking network focused on integrity and responsibility | Banking | 🇭🇷 Zagreb | 2,063 | 1914 |
| 4 | [HEP](https://www.tamtam.ai/c/hep) (hep.hr)<br>National electricity provider with over a century of experience in production, transmission, distribution, heat supply, and gas distribution through a holding structure | Appliances, Electrical, and Electronics Manufacturing | 🇭🇷 Zagreb | 2,058 | 1884 |
| 5 | [Privredna banka Zagreb d. d.](https://www.tamtam.ai/c/privredna-banka-zagreb-d-d) (pbz.hr)<br>A leading financial institution offering a wide range of banking services to individuals and businesses, with a strong international presence | Banking | 🇭🇷 Zagreb | 1,644 | 1966 |
| 6 | [Croatia osiguranje d.d.](https://www.tamtam.ai/c/croatia-osiguranje-d-d) (crosig.hr)<br>Leading insurance provider in Croatia offering various types of insurance, supporting national economy, embracing social responsibility, and focusing on innovative products and client satisfaction | Insurance | 🇭🇷 Zagreb | 1,410 | 1884 |
| 7 | [A1 Hrvatska d.o.o.](https://www.tamtam.ai/c/a1-hrvatska-d-o-o) (a1.hr)<br>Digital solutions provider in Central and Eastern Europe, offering innovative services and communications solutions to simplify and enhance customer experiences | Telecommunications | 🇭🇷 Zagreb | 1,296 | 1999 |
| 8 | [Erste&Steiermärkische Bank d.d. (Erste Bank Croatia)](https://www.tamtam.ai/c/erste-and-steiermarkische-bank-d-d-erste-bank-croatia) (erstebank.hr)<br>A leading bank in the region, part of a large international financial group, offering innovative financial services and products to over 900,000 clients | Financial Services | 🇭🇷 Rijeka | 1,283 | 1954 |
| 9 | [University Hospital Centre Zagreb, Croatia](https://www.tamtam.ai/c/university-hospital-centre-zagreb-croatia) (kbc-zagreb.hr)<br>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 | Hospitals and Health Care | 🇭🇷 Zagreb | 1,201 |  |
| 10 | [OTP banka Hrvatska](https://www.tamtam.ai/c/otp-banka-hrvatska) (otpbanka.hr)<br>A green, innovative bank focusing on new technologies, quality financial products, and supporting clients in achieving their personal and business goals | Banking | 🇭🇷 Split | 1,095 | 1955 |
| 11 | [Hrvatska poštanska banka, dioničko društvo](https://www.tamtam.ai/c/hrvatska-postanska-banka-dionicko-drustvo) (hpb.hr)<br>A leading Croatian financial institution with a focus on knowledge, innovation, and community responsibility, serving a large client base across the country | Banking | 🇭🇷 Zagreb | 912 | 1991 |
| 12 | [Financijska agencija - Fina](https://www.tamtam.ai/c/financijska-agencija-fina) (fina.hr)<br>Leading Croatian provider of financial and electronic services, operating on a market principle, collaborating with banks, institutions, and businesses on various projects nationwide | Financial Services | 🇭🇷 Zagreb | 903 |  |
| 13 | [Raiffeisenbank Hrvatska](https://www.tamtam.ai/c/raiffeisenbank-hrvatska) (rba.hr)<br>A financial institution offering simple, fast, and professional financing and asset management services while striving to positively impact society and the environment | Financial Services | 🇭🇷 Zagreb | 894 | 1994 |
| 14 | [Croatia Airlines](https://www.tamtam.ai/c/croatia-airlines) (croatiaairlines.com)<br>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 | Airlines and Aviation | 🇭🇷 Zagreb | 790 | 1989 |
| 15 | [Addiko Bank Hrvatska](https://www.tamtam.ai/c/addiko-bank-hrvatska) (addiko.hr)<br>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 | Banking | 🇭🇷 Zagreb | 763 | 1996 |
| 16 | [Hrvatska pošta](https://www.tamtam.ai/c/hrvatska-posta) (posta.hr)<br>A leading provider of logistics and postal services in Croatia, dedicated to meeting present and future customer needs with high quality services | Freight and Package Transportation | 🇭🇷 Velika Gorica | 721 | 1999 |
| 17 | [Sestre milosrdnice University Hospital Center](https://www.tamtam.ai/c/sestre-milosrdnice-university-hospital-center) (kbcsm.hr)<br>A leading healthcare institution in Croatia, offering a wide range of medical services, scientific activities, and hosting educational facilities | Hospitals and Health Care | 🇭🇷 Zagreb | 685 | 1846 |
| 18 | [Croatian National Bank](https://www.tamtam.ai/c/croatian-national-bank) (hnb.hr)<br>A central bank part of the Eurosyste, responsible for maintaining price stability and financial system stability, and participates in the EU monetary policy implementation | Government Administration | 🇭🇷 Zagreb | 642 | 1990 |
| 19 | [Telemach Hrvatska](https://www.tamtam.ai/c/telemach-hrvatska) (telemach.hr)<br>A leading provider of telecommunications and media services in Southeast Europe, offering top-notch customer value, cutting-edge technology, and community engagement | Telecommunications | 🇭🇷 Zagreb | 592 |  |
| 20 | [KBC Split](https://www.tamtam.ai/c/kbc-split) (kbsplit.hr)<br>A leading hospital center in Croatia with three locations, providing specialized medical care, inpatient services, and medical research activities | Hospitals and Health Care | 🇭🇷 Split | 582 |  |
| 21 | [VIPnet d.o.o.](https://www.tamtam.ai/c/vipnet-d-o-o) (a1.hr)<br>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 | Telecommunications | 🇭🇷 Zagreb | 563 | 1998 |
| 22 | [Hrvatski zavod za mirovinsko osiguranje (HZMO) - Croatian Pension Insurance Institute](https://www.tamtam.ai/c/hrvatski-zavod-za-mirovinsko-osiguranje-hzmo-croatian-pension-insurance) (mirovinsko.hr)<br>A public institution in Croatia implementing pension insurance based on generational solidarity, ensuring legality, timeliness, and quality of service through modern technology | Government Administration | 🇭🇷 Zagreb | 490 | 1922 |
| 23 | [Clinical hospital Osijek](https://www.tamtam.ai/c/clinical-hospital-osijek) (kbco.hr)<br>The public hospital in eastern Croatia offers a wide range of medical services including surgery, internal medicine, pediatrics, gynecology, oncology, and neurology | Hospitals and Health Care | 🇭🇷 Osijek | 461 | 1875 |
| 24 | [Zuger Kantonsspital](https://www.tamtam.ai/c/zuger-kantonsspital) (zgks.ch)<br>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 | Hospitals and Health Care | 🇭🇷 Baar | 390 | 1863 |
| 25 | [Zagrebački holding d.o.o.](https://www.tamtam.ai/c/zagrebacki-holding-d-o-o) (zgh.hr)<br>A diversified group specializing in gas distribution, waste management, water services, road maintenance, property management, parking services, pharmaceuticals, and infrastructure development | Government Administration | 🇭🇷 Zagreb | 386 | 2006 |
| 26 | [Sberbank d.d. Croatia](https://www.tamtam.ai/c/sberbank-d-d-croatia) (sberbank.hr)<br>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 | Banking | 🇭🇷 Zagreb | 363 |  |
| 27 | [Croatia Control](https://www.tamtam.ai/c/croatia-control) (crocontrol.hr)<br>CCL provides air navigation services in Croatia, ensuring air traffic safety and compliance with international regulations and standards | Airlines and Aviation | 🇭🇷 Velika Gorica | 349 | 1992 |
| 28 | [Wiener osiguranje Vienna Insurance Group d.d.](https://www.tamtam.ai/c/wiener-osiguranje-vienna-insurance-group-d-d) (wiener.hr)<br>A leading insurance provider in Croatia, offering a wide range of services through a strong sales network and dedicated employees | Insurance | 🇭🇷 Zagreb | 274 |  |
| 29 | [HOPS Croatian Transmission System Operator Plc.](https://www.tamtam.ai/c/hops-croatian-transmission-system-operator-plc) (hops.hr)<br>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 | Utilities | 🇭🇷 Zagreb | 270 | 2013 |
| 30 | [KentBank d.d.](https://www.tamtam.ai/c/kentbank-d-d) (kentbank.hr)<br>A boutique bank in Croatia focusing on retail and SME clients, offering advanced digital banking services and a unique networking concept | Banking | 🇭🇷 Zagreb | 190 | 1998 |
| 31 | [ENNA](https://www.tamtam.ai/c/enna) (enna.hr)<br>A rapidly growing company in Croatia, Energia Naturalis group manages various operations including natural gas distribution, renewable energy, trading, and investment projects | Investment Management | 🇭🇷 Zagreb | 187 | 2010 |
| 32 | [Podravska banka](https://www.tamtam.ai/c/podravska-banka) (poba.hr)<br>An established bank in Croatia offering modern financial services, personalized banking solutions, and a wide range of financial products to customers and businesses | Banking | 🇭🇷 Koprivnica | 93 | 1872 |
| 33 | [Raiffeisen mirovinski fondovi](https://www.tamtam.ai/c/raiffeisen-mirovinski-fondovi) (rmf.hr)<br>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 | Pension Funds | 🇭🇷 Zagreb | 37 | 2001 |
| 34 | [GPP d.o.o.](https://www.tamtam.ai/c/gpp-d-o-o) (web.gpp-osijek.com)<br>The company provides public city transportation services with full IT support, including vehicle and passenger tracking, online tools, and marketing services | Truck Transportation | 🇭🇷 Osijek | 11 |  |

## 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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## The same list elsewhere in Croatia

- [Critical infrastructure operators in Zagreb](https://www.tamtam.ai/l/critical-infrastructure-operators-zagreb) (25)

## The same list elsewhere

- [Critical infrastructure operators in the world](https://www.tamtam.ai/l/critical-infrastructure-operators-in-the-world) (23,312)
- [Critical infrastructure operators in Europe](https://www.tamtam.ai/l/critical-infrastructure-operators-in-europe) (9,815)

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Source: https://www.tamtam.ai/l/critical-infrastructure-operators-croatia