89 leading critical infrastructure operators in Indiana (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	Elevance Health elevancehealth.com Serving over 118 million people with a digital platform and integrated health services, focusing on improving health at every stage.	Hospitals and Health Care	🇺🇸 Indianapolis	43,568	n/a
2	Indiana University Health iuhealth.org Provides comprehensive healthcare services, innovative treatments, and groundbreaking research through a partnership with Indiana University School of Medicine Prioritizes personal and professional growth	Hospitals and Health Care	🇺🇸 Indianapolis	20,779	n/a
3	Anthem, Inc.elevancehealth.com A company formerly known as Anthem, Inc has rebranded as Elevance Health Follow them on their new LinkedIn page	Hospitals and Health Care	🇺🇸 Indianapolis	19,648	n/a
4	Community Health Network ecommunity.com A non-profit health system in Central Indiana providing a full continuum of care through hospitals, physicians, home care, and other services	Hospitals and Health Care	🇺🇸 Indianapolis	8,889	n/a
5	Parkview Health parkview.com Largest not-for-profit healthcare provider in northeast Indiana, offering compassionate care with advanced technology and partnering with communities for wellness.	Hospitals and Health Care	🇺🇸 Fort Wayne	8,176	1878
6	NiSource nisource.com A utility company serving 4 million customers across 6 states with safe, reliable, and affordable gas and electric services, investing in infrastructure for the future	Utilities	🇺🇸 Merrillville	6,597	n/a
7	Old National Bank oldnational.com Regional bank providing financial services with strong community ties, supporting entrepreneurs, families, business owners, and retirees in the Midwest.	Banking	🇺🇸 Evansville	5,432	n/a
8	Beacon Health System beaconhealthsystem.org A non-profit health care system serving the community by providing services to the underinsured and underserved through various hospitals and medical facilities	Hospitals and Health Care	🇺🇸 South Bend	5,368	2012
9	USIC usicllc.com A leading provider of underground utility damage prevention services and utility solutions in the United States and Canada	Utilities	🇺🇸 Indianapolis	5,331	n/a
10	Franciscan Health franciscanhealth.org Large Catholic healthcare system operating 12 hospitals and over 260 locations with 850+ providers offering primary and specialty care.	Hospitals and Health Care	🇺🇸 Mishawaka	5,318	1875
11	Republic Airways rjet.com A regional airline providing safe, reliable flights for major carriers with a fleet of Embraer jets and multiple bases across the US	Airlines and Aviation	🇺🇸 Indianapolis	4,334	1974
12	St. Vincent Health healthcare.ascension.org A healthcare organization operating 23 hospitals, medical practices, and clinics in central and southern Indiana, dedicated to compassionate care for all	Hospitals and Health Care	🇺🇸 Indianapolis	4,279	1881
13	Deaconess Health System deaconess.com Premiere healthcare provider in southwestern Indiana, western Kentucky, and southeastern Illinois with 18 hospitals, clinics, and specialty services focusing on patient-centered care	Hospitals and Health Care	🇺🇸 Evansville	4,243	1892
14	Eskenazi Health eskenazihealth.edu Comprehensive healthcare provider offering primary and specialty medical services through hospital and community health centers, focusing on vulnerable populations.	Hospitals and Health Care	🇺🇸 Indianapolis	3,817	1859
15	Metronet metronet.com A fast-growing telecommunication company offering cutting-edge fiber-optic technology for TV, voice, and internet services, focused on customer care and innovation	Telecommunications	🇺🇸 Evansville	2,737	2005
16	Methodist Hospitals methodisthospitals.org A healthcare system in Northwest Indiana providing advanced diagnostic imaging, addressing community health needs, expanding services, and emphasizing quality, safety, and patient experience	Hospitals and Health Care	🇺🇸 Gary	2,469	1923
17	Good Samaritan gshvin.org A leading community health care facility offering a wide range of medical services with cutting-edge technology and a commitment to exceptional patient care	Hospitals and Health Care	🇺🇸 Vincennes	2,240	1908
18	First Merchants Corporation firstmerchants.com A financial services holding company in Central Indiana, offering commercial and personal banking, wealth management, and community support across multiple states	Financial Services	🇺🇸 Muncie	2,187	1893
19	Union Hospital union.health A regional referral center and largest not-for-profit medical center, providing high quality care to residents in west-central Indiana and east-central Illinois	Hospitals and Health Care	🇺🇸 Terre Haute	2,099	1892
20	Reid Health reidhealth.org A nationally ranked nonprofit hospital in Indiana offering top-quality care in critical care, pulmonary care, and orthopedic surgery with dedication and compassion	Hospitals and Health Care	🇺🇸 Richmond	1,747	1905
21	IU Health Methodist Hospital iuhealth.org A top-ranked hospital known for quality, safety, nursing excellence, and high-quality clinical outcomes, recognized nationally by University Health Consortium and US News & World Report	Medical Practices	🇺🇸 Indianapolis	1,724	n/a
22	Indiana Department of Transportation in.gov INDOT is a transportation agency in Indiana, offering dynamic opportunities for professionals to improve infrastructure, safety, mobility, and economic growth	Truck Transportation	🇺🇸 Indianapolis	1,722	1919
23	Riverview Health riverview.org A healthcare provider with a full-service hospital, urgent care facilities, and various specialty-care centers, offering inpatient and outpatient services in 35 specialties	Hospitals and Health Care	🇺🇸 Noblesville	1,573	1909
24	Columbus Regional Health - Columbus, Indiana crh.org Integrated health system offering extraordinary care in a relationship-based culture, with flagship hospital, network of physicians, and top national rankings in cardiovascular care and patient-centered practices	Hospitals and Health Care	🇺🇸 Columbus	1,513	1917
25	Hendricks Regional Health hendricks.org A nonprofit community-based health system in Western and Central Indiana, offering innovative healthcare services and wellness programs for patients and employees	Hospitals and Health Care	🇺🇸 Danville	1,506	1962
26	Riley Children's Health rileychildrens.org Provider of comprehensive healthcare services for children across Indiana, with emphasis on care at Riley Hospital for Children in downtown Indianapolis	Hospitals and Health Care	🇺🇸 Indianapolis	1,492	1924
27	Franciscan St. Francis Health franciscanhealth.org A Catholic healthcare system with 14 hospital campuses in Indiana and Illinois, providing top-tier medical services and state-of-the-art facilities	Hospitals and Health Care	🇺🇸 Indianapolis	1,461	n/a
28	St. Mary's Health stvincentswin.org Healthcare provider offering a wide range of specialized medical services, guided by a mission to serve all individuals, especially those in need	Hospitals and Health Care	🇺🇸 Evansville	1,433	1872
29	IU Health Bloomington Hospital iuhealth.org A healthcare organization providing medical services and programs in Bloomington, focusing on improving the health and well-being of the community	Hospitals and Health Care	🇺🇸 Bloomington	1,391	1905
30	Midcontinent Independent System Operator (MISO)misoenergy.org Electric grid operator ensuring reliable, affordable power to over 45 million people across 15 U.S. states and Manitoba, Canada.	Utilities	🇺🇸 Carmel	1,370	2001
31	NIPSCO nipsco.com A large energy company serving northern Indiana with natural gas and electric services, part of a larger corporation serving millions nationwide	Utilities	🇺🇸 Merrillville	1,276	n/a
32	1st Source Bank 1stsource.com Regional financial institution providing personal and business banking, specialty finance, wealth advisory, and insurance services through local banking centers and nationwide offices.	Banking	🇺🇸 South Bend	1,235	1863
33	Community Healthcare System powershealth.org A non-profit healthcare system in Northwest Indiana with four hospitals providing high quality, advanced care to patients in the region	Hospitals and Health Care	🇺🇸 Munster	1,158	2001
34	Indiana Department of Health health.in.gov The Indiana Department of Health provides and promotes essential public health services in the state	Wellness and Fitness Services	🇺🇸 Indianapolis	1,133	1881
35	Centier Bank centier.com A family-owned bank in Indiana since 1895, committed to preserving independent, hometown banking for generations to come with world-class service	Banking	🇺🇸 Merrillville	1,101	1895
36	American Commercial Barge Line (ACBL)bargeacbl.com Trusted leader in marine transportation for over 100 years, moving freight on US inland waterways to build the country's economy and feed the world	Transportation, Logistics, Supply Chain and Storage	🇺🇸 Jeffersonville	1,048	1915
37	Community Healthcare System comhs.org A not-for-profit organization in Northwest Indiana focuses on enhancing health and quality of life through hospitals, community projects, and charitable endeavors	Hospitals and Health Care	🇺🇸 Munster	1,038	n/a
38	Elkhart General Hospital beaconhealthsystem.org A not-for-profit hospital in Elkhart, Indiana, providing comprehensive medical care to the community through a patient-first approach and continuous quality improvement	Hospitals and Health Care	🇺🇸 Elkhart	1,016	1909
39	Majestic Care majesticcare.com Specializing in community-based nursing care, we offer rehabilitation, long-term care, and Memory Care services with a focus on compassion and person-centered approach	Hospitals and Health Care	🇺🇸 Westfield	987	2018
40	Marion Health marionhealth.com A trusted not-for-profit healthcare provider with advanced medical services, state-of-the-art facilities, skilled staff, and award-winning programs, serving rural areas with excellence	Hospitals and Health Care	🇺🇸 Marion	977	n/a
41	Riley Hospital for Children rileychildrenshospital.com A hospital and healthcare company in Indianapolis, Indiana, dedicated to providing specialized care for children at Riley Hospital for Children	Hospitals and Health Care	🇺🇸 Indianapolis	974	n/a
42	Saint Joseph Health System (Indiana)sjmed.com Not-for-profit health system providing compassionate, faith-based care with advanced medical technology, various hospitals, physician network, senior living communities, and home care services	Hospitals and Health Care	🇺🇸 Mishawaka	948	1882
43	First National Bank fnb-bank.com A community bank in Indianapolis with over 100 years of stability, offering a full range of banking services for individuals and small businesses	Banking	🇺🇸 Cloverdale	933	1913
44	Northwest Health nwhealthin.com Northwest Health operates multiple hospitals, physician offices, urgent cares, surgery centers, and more in Northwest Indiana, delivering quality and compassionate healthcare services	Hospitals and Health Care	🇺🇸 Valparaiso	854	n/a
45	Bowen Health bowenhealth.org Provider of mental health, primary health, and substance abuse treatment in Indiana through a dedicated team offering comprehensive services in various settings	Medical Practices	🇺🇸 Warsaw	853	1960
46	Alverno Laboratories alvernolabs.com Management of hospital laboratories, extensive patient service centers, advanced pathology testing, and ISO-certified central laboratory serving Midwest communities.	Hospitals and Health Care	🇺🇸 Hammond	846	1999
47	Marion County Public Health Department marionhealth.org A health department serving Marion County, Indiana for nearly a century, promoting health, preventing disease, and protecting against injuries and disabilities	Hospitals and Health Care	🇺🇸 Indianapolis	834	n/a
48	Schurz Communications schurz.com A technology company focused on information sharing and global connections, with a mission to seek and share truth for positive impact	Technology, Information and Internet	🇺🇸 Mishawaka	833	1872
49	Citizens Energy Group info.citizensenergygroup.com A public trust providing clean, efficient, and reliable energy services to customers in the Indianapolis area, prioritizing customer service and community benefit	Utilities	🇺🇸 Indianapolis	778	1887
50	German American Bank germanamerican.com A financial institution providing banking, insurance, investments, and wealth management services in Southern Indiana and Kentucky, dedicated to building lasting client relationships and community support	Financial Services	🇺🇸 Jasper	740	1910
51	USPS Usps.com Indianapolis area provider of towing, auto parts, scrap metal recycling, body shop services, auto auctions, and cash for cars	Transportation, Logistics, Supply Chain and Storage	🇺🇸 Indianapolis	732	n/a
52	Major Hospital/Major Health Partners mymhp.org Provider of quality healthcare services since 1924, utilizing advanced technology and a dedicated staff to prioritize optimal outcomes for patients and the community	Hospitals and Health Care	🇺🇸 Shelbyville	727	1924
53	Horizon Bank horizonbank.com A community bank serving Indiana and Michigan regions, providing exceptional service, sensible advice, and local decision-making to support community growth and prosperity	Banking	🇺🇸 Michigan City	727	1873
54	First Financial Bank NA first-online.bank A historic bank holding company with roots dating back to 1834, offering financial services through multiple community banks in Indiana and Illinois	Banking	🇺🇸 Terre Haute	721	1834
55	Railserve, Inc.railserve.com A leading provider of on-site rail services in North America, offering safe and efficient railcar movement and material handling solutions for industrial plants	Rail Transportation	🇺🇸 Frankfort	694	1981
56	Hancock Health hancockhealth.org Providing whole-person healthcare through hospital, clinics, wellness centers, and specialty services with community focus and advanced medical partnerships.	Hospitals and Health Care	🇺🇸 Greenfield	677	1951
57	Miller's Merry Manor millersmerrymanor.com Provider of senior health care and post acute care rehab services across over 30 communities in Indiana	Hospitals and Health Care	🇺🇸 Warsaw	673	1965
58	NextGear Capital by Cox Automotive nextgearcapital.com Flexible lines of credit and account management tools for dealers to purchase new and used inventory at auctions across North America.	Financial Services	🇺🇸 Carmel	668	2013
59	Liberty Federal Credit Union libertyfcu.org A member-owned financial institution providing innovative products and services, including high-interest checking accounts and a wide variety of mortgage options Serving over 270,000 members nationwide	Banking	🇺🇸 Evansville	654	1936
60	Aspire Indiana Health aspireindiana.org A nonprofit health system in central Indiana providing integrated behavioral health, primary medical care, substance abuse treatment, social services, and more	Hospitals and Health Care	🇺🇸 Noblesville	650	1976
61	Memorial Hospital and Health Care Center mhhcc.org A comprehensive healthcare provider offering over 30 specialties, from inpatient to outpatient care, birthing services, and national award-winning excellence	Hospitals and Health Care	🇺🇸 Jasper	648	1951
62	Schneck Medical Center schneckmed.org A leading healthcare provider in Southern Indiana offering a range of services, recognized for excellence in patient care and employee satisfaction	Hospitals and Health Care	🇺🇸 Seymour	646	1911
63	Ball Memorial Hospital iuhealth.org Regional tertiary referral center offering a wide range of healthcare services including open heart surgery, joint replacement, perinatal care, and physician training programs	Hospitals and Health Care	🇺🇸 Muncie	633	1929
64	Johnson Memorial Health johnsonmemorial.org A full-service healthcare system in Indiana, providing high-quality, patient-centered care to Johnson County and surrounding areas, with membership in the Mayo Clinic Care Network	Hospitals and Health Care	🇺🇸 Franklin	631	1947
65	St.Vincent Indianapolis Hospital healthcare.ascension.org Faith-based healthcare organization committed to providing compassionate, personalized care to those in need, operating hospitals, senior living facilities, and various healthcare services nationwide	Hospitals and Health Care	🇺🇸 Indianapolis	626	n/a
66	AES Indiana aesindiana.com A company specializing in customized energy solutions, fostering innovation and collaboration to empower customer growth and achieve energy goals	Utilities	🇺🇸 Indianapolis	602	1927
67	Clark Memorial Hospital clarkmemorial.org A comprehensive medical center offering advanced care with a personal touch, combining technology with compassionate service and continuously expanding programs	Hospitals and Health Care	🇺🇸 Jeffersonville	592	1922
68	STAR Financial Bank starfinancial.com Financial group offering personalized banking solutions, financial planning, trust, and asset management services Specializing in commercial loans, mortgages, private banking, and treasury management	Banking	🇺🇸 Fort Wayne	591	1943
69	HealthNet indyhealthnet.org HealthNet is a Federally Qualified Health Center providing high-quality medical, dental, and behavioral health care regardless of insurance status They offer various rewarding healthcare careers	Hospitals and Health Care	🇺🇸 Indianapolis	586	n/a
70	Lake City Bank lakecitybank.com A longstanding Indiana bank with $65 billion in assets, offering technology-driven services in 15 counties while promoting diversity and inclusion	Banking	🇺🇸 Warsaw	572	1872
71	Franciscan Physician Network directory.franciscanhealth.org Healthcare network recruiting professionals with a passion for patient care, focusing on quality and collaboration in a faith-based mission	Hospitals and Health Care	🇺🇸 Mishawaka	556	2012
72	Indianapolis Airport Authority ind.com A municipal corporation operating Indiana's largest airport system in the Indianapolis area, with a $54 billion economic impact and top rankings in customer satisfaction	Airlines and Aviation	🇺🇸 Indianapolis	427	1962
73	FORUM Credit Union linktr.ee financial cooperative offering checking accounts, loans, mortgages, business accounts, and online bill pay with member-focused care and innovation	Financial Services	🇺🇸 Fishers	405	1941
74	First Internet Bank firstib.com An innovative online bank founded in 1999, offering a dynamic work environment for talented professionals seeking rewarding career opportunities	Banking	🇺🇸 Fishers	384	n/a
75	Hoosier Energy hoosierenergy.com A generation and transmission cooperative based in Indiana providing wholesale electric power, utilizing coal, natural gas, and renewable energy resources	Utilities	🇺🇸 Bloomington	357	1949
76	CountryMark countrymark.com American-owned company in oil exploration, production, refining, and marketing Distributes premium fuels, lubricants, and DEF to farms, fleets, and families in the Midwest	Oil and Gas	🇺🇸 Indianapolis	342	n/a
77	Purdue Federal Credit Union purduefed.com A financial institution providing a variety of banking services including loans, accounts, and online banking, with a focus on community support and employee satisfaction	Banking	🇺🇸 West Lafayette	252	1969
78	Indiana Michigan Power indianamichiganpower.com A company serving over 600,000 customers in Indiana and Michigan with an energy mix that is more than 2/3 emission free, focused on reliability and renewable energy	Utilities	🇺🇸 Fort Wayne	231	n/a
79	OnLine Transport onlinetransport.com A transportation company with a focus on customer satisfaction, technology-driven supply chain visibility, safety compliance, and environmental sustainability through proactive communication and advanced systems	Truck Transportation	🇺🇸 Greenfield	200	2000
80	First Savings Bank firstmerchants.com A Southern Indiana-based financial institution offering consumer and commercial products, wealth management, SBA lending, and national residential mortgage services	Banking	🇺🇸 Clarksville	199	1937
81	Liberty Financial, a Division of ETFCU liberty.financial A non-profit financial division offering low-cost services, competitive rates, and innovative solutions with a focus on member engagement and excellence	Financial Services	🇺🇸 Evansville	177	2002
82	MidWest America Federal Credit Union mwafcu.org A long-standing financial institution offering personal and business banking solutions with a commitment to quality services and member financial success	Banking	🇺🇸 Fort Wayne	169	1936
83	JCBank jcbank.com Established in 1900, this independent financial institution in south-central Indiana offers traditional banking services guided by honesty, respect, and teamwork	Banking	🇺🇸 Seymour	162	1900
84	Forethought Financial Group, Inc.globalatlantic.com A financial group that operates on a global scale, offering a wide range of financial services and products to individuals and institutions	Insurance	🇺🇸 Indianapolis	114	n/a
85	First State Bank bfirst.bank A century-old bank offering a range of financial products and services, including banking solutions, loans for homes and businesses, and secure technology	Banking	🇺🇸 Middlebury	81	1910
86	UNITED TRANSPORT INC.gounitedtransport.com An asset based transportation and logistics company assisting businesses with freight shipping needs, known for their outstanding services and reputation	Truck Transportation	🇺🇸 Hammond	30	2008
87	Kosciusko REMC kremc.com A company dedicated to providing safe, quality electric energy and services to customers at competitive costs, prioritizing integrity, innovation, and community commitment	Utilities	🇺🇸 Warsaw	28	1939
88	Evansville Federal Credit Union evansvillefcu.org A full-service financial institution offering a variety of products and services, with a focus on member satisfaction and personalized assistance	Financial Services	🇺🇸 Evansville	19	1961
89	Gladieux Energy bloomberg.com This company owns and manages refinery and terminal assets in Fort Wayne and Huntington, Indiana, serving the US energy market	Oil and Gas	🇺🇸 Fort Wayne	19	1986

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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.

89 leading critical infrastructure operators in Indiana

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