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100 leading professional services firms in Grand Est

Tamtam tracks 316 professional services firms headquartered in Grand Est. This list ranks the 100 largest by number of employees on LinkedIn, led by Astek, Air France Industries KLM Engineering & Maintenance and Euro Information Developpements / EID. Their median headcount is 330. Half of them were founded in 1992 or later. The most common headquarters are Strasbourg (11), Reims (5) and Metz (4).

🇫🇷 Grand Est100 companiesUpdated Nov 12, 2026

These professional services firms in Grand Est are mainly large enterprises, with a strong presence in IT services and industrial engineering. Astek supports digital transformation, while Euro Information Developpements provides IT systems for banks. Clemessy specializes in electrical and mechanical engineering, and Technology & Strategy offers engineering and digital consulting. Omexom focuses on power grid solutions, and Axima Réfrigération France is an industrial refrigeration specialist.

The companies listed show a mix of sectors. While IT services and industrial engineering are prominent, there are also firms like SUPPLAY in staffing and recruiting, and BNP Paribas Wealth Management in banking. The presence of companies like Groupe Ponticelli Frères, founded in 1921, and Axima Réfrigération France, founded in 1876, indicates a strong historical industrial base.

#CompanyIndustryHeadquarters EmployeesFounded
1
Astekastekgroup.fr

Supports clients with high-value service, deep technical expertise across technology, operations, and engineering, focusing on sustainable digital transformation with humans at the core.

IT Services and IT Consulting 🇫🇷 Boulogne-Billancourt 6,035 1988
2
Air France Industries KLM Engineering & Maintenanceafiklmem.com

Provides comprehensive aircraft maintenance, repair, and overhaul services, focusing on air safety, operational management, cost minimization, and technical excellence with an extensive track record.

Airlines and Aviation 🇫🇷 Roissy en France 3,989 n/a
3
Euro Information Developpements / EIDe-i.com

IT subsidiary of a bank-insurance group, designing, building, maintaining, and operating an information system unit for affiliated banks with 2300 employees across various locations

Software Development 🇫🇷 Strasbourg 3,624 1978
4
Clemessyclemessy.com

Specializing in electrical and mechanical engineering, Clemessy designs, installs, and maintains systems for various industries worldwide, with a strong focus on industrial installations

Automation Machinery Manufacturing 🇫🇷 Mulhouse 2,405 n/a
5
Technology & Strategytands.com

Provides engineering, digital, and consulting services, developing innovative projects for industrial, automotive, and financial sectors with a focus on human values and global presence.

IT Services and IT Consulting 🇫🇷 Schiltigheim 2,370 2008
6
Twodaytwoday.com

Providing AI-driven software engineering and business applications to help public and private sectors make better decisions and create meaningful change.

IT Services and IT Consulting 🇫🇷 2,347 2022
7
Groupe Ponticelli Frèresponticelli.com

Provides mechanical, piping, and lifting services globally, designing, building, modernizing, and maintaining production installations for energy, industrial, and infrastructure sectors.

Industrial Machinery Manufacturing 🇫🇷 2,220 1921
8
SUPPLAYsupplay.fr

Providing responsible and flexible staffing solutions to support economic actors in adapting to change, while prioritizing skill development and corporate social responsibility

Staffing and Recruiting 🇫🇷 Reims 2,192 1968
9
BNP Paribas Wealth Managementwealthmanagement.bnpparibas

Leading global private bank, supporting high-net-worth individuals, entrepreneurs, and families in protecting, growing, and passing on their assets, aiming for a sustainable future.

Banking 🇫🇷 Paris 2,186 n/a
10
Smilesmile.eu

This company offers open-source digital services, including e-commerce platforms, business applications, and data management, to enhance client businesses with reliable technology decisions.

IT Services and IT Consulting 🇫🇷 Asnières sur seine 2,040 1991
11
Omexomomexom.com

Specializing in power grid solutions, Omexom helps clients navigate the energy transition by integrating renewable energy, storage solutions, and smart infrastructures Independently selecting optimal technologies

Electric Power Transmission, Control, and Distribution 🇫🇷 1,825 2000
12
Gingergroupeginger.com

Leader in independent engineering, specializing in soil, water, material, and environmental engineering, securing projects, optimizing durability, and integrating them environmentally.

Business Consulting and Services 🇫🇷 Élancourt 1,777 1933
13
Axima Réfrigération Franceequans.fr

Industrial refrigeration specialist providing installation and maintenance services for food industries, retail, logistics, and chemistry through a network of eighty French regional agencies.

HVAC and Refrigeration Equipment Manufacturing 🇫🇷 Bischheim 1,690 1876
14
A2micile Europerassemblons-nos-talents.com

Network of over 100 agencies providing personal home care services across France, employing more than 3,000 staff members.

Individual and Family Services 🇫🇷 Strasbourg 1,660 2005
15
Stelliantstelliant.com

Leading provider of insurance services, assisting individuals, professionals, businesses, and insurers with risk management, claims, and prevention across France and internationally.

Insurance 🇫🇷 Puteaux 1,573 1987
16
Start People Francestartpeople.fr

Specializes in recruiting, selecting, and placing trained, motivated personnel in permanent, temporary, or fixed-term contracts across France.

Staffing and Recruiting 🇫🇷 St Julien les Metz 1,385 n/a
17
Capfinancescapfinances.fr

Capfinances is an insurance broker specializing in wealth solutions, retirement savings, and protection for individuals and professionals, with a national presence

Insurance Agencies and Brokerages 🇫🇷 Bois-Guillaume 1,142 2004
18
SIS

A leading company in sanitation services (maintenance, control, rehabilitation) in the Grand Est region with 700 employees serving individuals, communities, and industries

Environmental Services 🇫🇷 Woippy 1,068 n/a
19
Citeosciteos.fr

Citeos specializes in urban lighting, urban equipment, and connected services for cities and communities, offering customized solutions and comprehensive management

Environmental Services 🇫🇷 943 n/a
20
Expectrarandstadprofessional.fr

A leading French company specializing in temporary staffing and recruitment of professionals offering expertise in IT, engineering, finance, sales, HR, and law

Human Resources Services 🇫🇷 La Plaine St Denis 920 1999
21
Onet Sécuritéonet.fr

Company offers human and electronic security solutions, including remote surveillance, video protection, audit, and consulting, mastering engineering to operation for various sites.

Security and Investigations 🇫🇷 Marseille 889 1860
22
Alpes Contrôlesalpes-controles.fr

Support clients regulatory compliance construction, safety coordination, environmental protection, diagnostics, training, certification, with ethical governance and societal responsibility.

Construction 🇫🇷 856 1988
23
EY Société d'Avocatsey.com

Provides legal and tax advisory services in France with expertise in tax, social law, business law, and international mobility management.

Law Practice 🇫🇷 838 n/a
24
SUP INTERIMsupinterim.fr

Staffing agency specializing in temporary work, fixed-term, and permanent contracts across various sectors like construction, logistics, and industry throughout France and Luxembourg.

Staffing and Recruiting 🇫🇷 Golbey 837 1985
25
AFNOR Certificationafnor.org

This company is certified with NF Service in France and Service in Europe, ensuring high quality and standards in its operations

Business Consulting and Services 🇫🇷 669 1989
26
FCNfcn.fr

Expertise comptable and commissariat aux comptes services provided by 400 professionals across 20 offices in France, with international membership in MGI association.

Accounting 🇫🇷 Bezannes 664 1945
27
CDER : Expertise comptable et conseilcder.fr

Provides accounting, tax, legal, and social advisory services to farmers, artisans, small businesses, professionals, and individuals with expert support.

Accounting 🇫🇷 Châlons-en-Champagne 660 1956
28
Asdiaasdia.fr

ASDIA is a patient-centered company providing holistic care and education for diabetic and chronically ill patients, focusing on human values and expertise

Home Health Care Services 🇫🇷 Strasbourg 637 n/a
29
Athomeathome.fr

Specializes in outsourcing email and paper mail for property managers. Handles electronic and postal mailings, notices, and collections. Provides tracking, archiving, and personalized support.

Administrative and Support Services 🇫🇷 Fontenay-sous-Bois 635 1987
30
Pentalogglobant.com

A global IT service platform under Globant, offering design, development, and marketing services, with agile methodologies and a focus on product value

Software Development 🇫🇷 Paris 614 1993
31
SGP Sécuritégroupesgp.fr

Provides human surveillance, reception, training, and technological security solutions for industrial, institutional, and complex high-security sectors across France and internationally.

Security and Investigations 🇫🇷 Metz 608 2005
32
Groupe Menwaygroupemenway.com

Independent human resources actor, federating complementary expertise in HR to meet organizational challenges, supporting individuals throughout their professional lives.

Human Resources Services 🇫🇷 Metz 604 2002
33
ADISadis-assurances.com

Management center for insured association specializing in retirement, savings, provident, and health insurance serving over 700,000 members.

Insurance 🇫🇷 Schiltigheim 559 1980
34
julhiet sterwenjulhiet-sterwen.com

Key player in management, human resources and operational consulting. Blends talent and business know-how, accelerating companies’ competitiveness through practical, innovative, digital solutions.

Business Consulting and Services 🇫🇷 Neuilly-sur-Seine 548 2015
35
Hervé Schauer Consultants (HSC)hs2.fr

Provides information security consulting, audits, penetration tests, risk management, and training services to secure diverse infrastructures and systems.

Computer and Network Security 🇫🇷 Neuilly-sur-Seine 500 1989
36
ARTUS ONSITEartus-interim.com

A family-owned HR services company with over 30 years of experience, offering temporary staffing, recruitment, training, and workforce management solutions across various sectors

Human Resources Services 🇫🇷 Tours 460 1992
37
SODI Maintenance et Services Industrielssodi.fr

Provides comprehensive industrial maintenance and cleaning services, specializing in high-pressure cleaning and petroleum work across various sectors like chemicals, refining, and automotive.

Industrial Machinery Manufacturing 🇫🇷 Châteauneuf-les-Martigues 431 n/a
38
Groupe DLSIgroupedlsi.com

Provides temporary staffing and human resource management services across multiple sectors in France, Luxembourg, Germany, Poland, and Switzerland.

Human Resources Services 🇫🇷 Forbach 420 1992
39
CERFRANCE Poitou-Charentespoitoucharentes.cerfrance.fr

Provides accounting expertise and business consulting services to entrepreneurs, supporting company creation, management, and succession in Poitou-Charentes.

Accounting 🇫🇷 403 1956
40
ICC Arbitrationiccwbo.org

Supervises and administers arbitration proceedings under ICC Rules, offering a reliable alternative to court litigation for international disputes, without nationality restrictions.

Non-profit Organizations 🇫🇷 Paris 401 1923
41
Yzicoyzico.fr

Provides support to entrepreneurs in the Grand Est region, leveraging deep local knowledge to navigate a constantly changing business environment.

Accounting 🇫🇷 398 n/a
42
IZI confort, groupe EDFizi-by-edf-entretien.fr

Specialist in maintenance, servicing, and replacement of thermal heating installations for residential and commercial customers as part of the EDF Group.

Repair and Maintenance 🇫🇷 Massy 391 2003
43
CSA (Institut d'Etudes)csa.eu

Provides companies and institutions understanding of consumer behaviors, analyzes environments, anticipates changes, and identifies engagement pathways for clear decision-making processes.

Market Research 🇫🇷 Puteaux 384 n/a
44
SODEXO JUSTICE SERVICES

Based in Guyancourt, Île-de-France, France, this retail company operates from 6 Rue de la Redoute. No further details about specific products or services provided.

Retail 🇫🇷 Guyancourt 361 n/a
45
COMETZcometz.fr

Offering outsourced solutions to large organizations looking for new sources of revenue and savings, focusing on customer relationship management and diversity

Telecommunications 🇫🇷 Metz 353 2000
46
B-Hive Engineeringb-hive.fr

Offers innovative and effective engineering solutions across diverse sectors including energy, transport, telecom, life sciences, industry, construction, and IT.

Business Consulting and Services 🇫🇷 Mulhouse 352 2017
47
Lustrallustral.fr

Certified cleaning and facility services for tertiary, industrial, and healthcare sectors across France, Switzerland, and Tunisia, focusing on outsourcing and CSR optimization.

Janitorial Services 🇫🇷 Reims 344 1959
48
Groupe OTEote-ingenierie.com

Multidisciplinary building engineering firm providing smart, long-lasting solutions across diverse sectors including industrial, pharmaceutical, data centers, and healthcare, combining advanced techniques and specialized entities.

Engineering Services 🇫🇷 Illkirch-Graffenstaden 341 1962
49
Novalixnovalix.com

Fully integrated drug discovery CRO offering support from target identification to preclinical candidates, specializing in medicinal chemistry, pharmacology, and biophysical techniques

Biotechnology Research 🇫🇷 Strasbourg 331 2002
50
Menway Emploimenwayemploi.com

Menway Emploi offers permanent and temporary recruitment services, including internships, CDDs, and CDIs across various industries to support career aspirations

Human Resources Services 🇫🇷 Metz 330 2002

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51
CLEEVENcleeven.com

Offers engineering consulting services, focusing on delivering exceptional technical skills and human qualities to support clients in achieving their project goals.

Research Services 🇫🇷 Lyon 328 2015
52
Batt & Associésbatt.eu

Provides expert management and specialist support in bookkeeping, business advice, and tailored solutions for business sales and transfers.

Accounting 🇫🇷 Nancy 323 1971
53
WeMawema.fr

Company operates multiple offices in various French cities, providing regional presence and local services across northeastern and central France.

Accounting 🇫🇷 Strasbourg 316 1947
54
IDEA France - Expertise automobileidea-expertises.com

Network of automotive experts providing damage assessment and repair evaluation for all motorized land and maritime vehicles across France.

Insurance 🇫🇷 Cagnes sur mer 308 2014
55
CERFRANCE Champagne Nord Est Ile de Francecerfrance.fr

Multidisciplinary association providing accounting, legal, and strategic advisory services to small businesses, farmers, and artisans across France through a local agency network.

Accounting 🇫🇷 REIMS Cedex 3 303 n/a
56
Next Décisionnext-decision.fr

A consulting firm specializing in business intelligence technologies, serving various industries in Western France with a focus on providing functional services to users

IT Services and IT Consulting 🇫🇷 Nantes 277 2010
57
Afigecafigec.com

Multi-skilled accounting firm, 40 years experience, 21 partners, 300 employees, offices in Paris, Lyon, Normandy, national player, international reach, 4400 clients.

Accounting 🇫🇷 Paris - Levallois Perret 275 1982
58
Confédération Nationale des Junior-Entreprisesjunior-entreprises.com

Enables students to gain professional experience by completing projects for clients, fostering skill development and real-world application.

Non-profit Organizations 🇫🇷 Paris 272 1969
59
Harry Hope.harry-hope.com

Recruitment consultants with extensive experience and networks finding talent across various sectors for clients globally, matching candidates to roles and companies.

Staffing and Recruiting 🇫🇷 Nancy 270 2019
60
DERgroupe-der.com

Specialized in building control, using infiltrometry and thermography to detect thermal losses, validate RT2012 and BBC labels, working on various projects

Environmental Services 🇫🇷 Saint-Louis 264 n/a
61
DIOTdiot-siaci.com

A leading independent insurance brokerage in France and abroad, serving large corporations with a diverse range of specialties and international support in 135 countries

Insurance 🇫🇷 261 n/a
62
IRH INGENIEUR CONSEILanteagroup.fr

International engineering and environmental consulting firm serving diverse clients worldwide with expertise in environmental solutions and sustainable development.

Environmental Services 🇫🇷 Ludres 261 n/a
63
Polyceapolyconseil.fr

Offers comprehensive digital transformation support to clients, developing high-value technical solutions and ambitious, state-of-the-art systems for various organizations.

IT Services and IT Consulting 🇫🇷 Paris 252 1989
64
Mencomenco-rh.fr

Independent, human-sized temporary staffing and recruitment company operating in all business sectors, connecting talent with opportunities across diverse industries.

Staffing and Recruiting 🇫🇷 Bouguenais 249 2013
65
TECSOLtecsol.fr

Independent solar engineering firm specializing in solar energy solutions and designs

Environmental Services 🇫🇷 248 1982
66
HSD Human Resource Solutionshsd-melt.com

Specializes in recruitment, temporary staffing, payroll management, and professional training across Europe and Sub-Saharan Africa with local market expertise.

Human Resources Services 🇫🇷 Mouzon 238 n/a
67
ACD AVOCATSacd.fr

Full-service legal support for companies across corporate, commercial, tax, and labor law, specializing in business development, innovation, restructuring, and collective proceedings.

Law Practice 🇫🇷 Nancy 226 1959
68
Hexanethexanet.fr

A Reims-based team of internet, network, and telecommunications professionals offering specialized services such as telecom, unified telephony, hosting, and more

IT Services and IT Consulting 🇫🇷 Reims 225 1997
69
BDL - Expertise comptable, audit & conseilbdl-experts.com

Accounting, audit, and consulting services for businesses in northern France, managing thirty years of expertise with three hundred staff and monthly payroll processing.

Accounting 🇫🇷 Valenciennes 224 1993
70
Ricoh Industrie France S.A.Sricoh-thermal.com

A global technology company offering innovative services and technologies in document management, IT services, printing solutions, visual communications, digital cameras, and industrial systems for 80 years

IT Services and IT Consulting 🇫🇷 Wettolsheim 205 1987
71
GROUPE COFIMEhlb-groupecofime.com

Provides comprehensive accounting, auditing, legal, and social expertise alongside strategic business consulting, wealth management, and international development support through a specialized professional network.

Accounting 🇫🇷 Colmar 202 1963
72
Hans & associéshans-associes.fr

Independent group with 400+ experts supporting over 9,000 companies across diverse sectors including agriculture, health, construction, and services.

Accounting 🇫🇷 Bollwiller 198 1985
73
Sofitexsofitex.fr

With over 30 years in HR, this international network specializes in temporary work and permanent placements throughout France, Germany, Switzerland, and Luxembourg

Staffing and Recruiting 🇫🇷 Mulhouse 194 1992
74
GROUPE MORGAN SERVICES Château-Thierrygroupe-morgan-services.fr

Specialist in recruitment and temporary personnel placement since 1972, providing staffing solutions through an extensive network of over ninety regional office branches.

Staffing and Recruiting 🇫🇷 Chateau Thierry 185 n/a
75
BS Engineeringbse-engineering.com

Partnering with construction players in civil engineering, transport infrastructure, energy, general installation, nuclear, and IT sectors.

Engineering Services 🇫🇷 Reims 184 2018
76
E'nergyse-nergys.com

Network of SMEs developing innovative solutions and services focused on water management and energy performance using digital technologies.

Environmental Services 🇫🇷 Benfeld 181 2014
77
FINVENSfinvens.fr

With over 20 years in financing for individuals, this company is the 3rd largest in France for credit consolidation, focusing on innovative solutions and team collaboration

Financial Services 🇫🇷 Toulouse 178 1988
78
C'PROkoesio.com

Provides printing, IT, and telecom solutions. Local agencies ensure proximity service. Management prioritizes employee development, fostering a great workplace culture for staff and clients.

IT Services and IT Consulting 🇫🇷 Valence 178 1991
79
Groupe BS - Bouchers Services - F2o - AgiliTgroupe-bs.com

Specialist in the food industry. Activities include meat processing, recruitment and training, and innovative solutions, with over 30 years of family history.

Food and Beverage Manufacturing 🇫🇷 Rennes 175 n/a
80
Groupe GISMICgroupegismic.com

Provides expert quality assurance, control, and inspection services for diverse industries like oil & gas, energy, and construction projects globally, ensuring project integrity.

Mechanical Or Industrial Engineering 🇫🇷 Ars-Laquenexy 169 2008
81
Athéo Ingénierieatheo.net

Provides infrastructure engineering services with a diverse team of architects, engineers, and technicians skilled in construction and software tools.

IT Services and IT Consulting 🇫🇷 Strasbourg 163 2013
82
THEDRAthedra.fr

company specializes in temporary staffing for hotels and restaurants, providing daily support to ensure quality service and facilitate management for establishments.

Human Resources Services 🇫🇷 Rennes 163 n/a
83
GEZIM Emploigezim.fr

Provides temporary staffing and recruitment services across France, Germany, and Luxembourg, specializing in technical trades, tertiary sectors, and the hotel and catering industry since 1971.

Staffing and Recruiting 🇫🇷 Strasbourg 161 1971
84
Premistapremista.fr

A key player in banking intermediation, the group represents major French banks through its agencies

Financial Services 🇫🇷 Gondreville 160 n/a
85
FIBA - Experts-comptablesgroupe-fiba.fr

Regional accounting firm offering expertise & advice to businesses, audit services, and personal consulting Specializing in all aspects of company and private financial management

Accounting 🇫🇷 Schiltigheim 157 1969
86
MONTECmontec.fr

Specialized company in equipment installation, industrial maintenance, piping, welding, and aeronautical works for over 20 years Operating in France and Germany

Machinery Manufacturing 🇫🇷 Saint-Avold 152 1997
87
NextRoadnextroad.com

Supporting infrastructure managers with building, knowing, and maintaining sustainable assets across two divisions: Roads & Works of Art, and Equipment.

Engineering Services 🇫🇷 Fontaine-lès-Dijon 148 2017
88
Adheoadheo.fr

A leading accounting firm in Lorraine, providing comprehensive services to small businesses with expertise in accounting, consulting, payroll, and training

Accounting 🇫🇷 Laxou 148 2006
89
Kelyps INTERIMkelyps-interim.com

Connecting businesses and candidates, a dynamic team supports projects. Specializing in matching companies with suitable individuals to fulfill staffing needs effectively.

Staffing and Recruiting 🇫🇷 Andrézieux-Bouthéon 139 2018
90
SECALsecal.fr

Provides accounting, auditing, management consulting, evaluation, and innovation support services to clients in the Eastern region since 1963.

Accounting 🇫🇷 Strasbourg 136 1963
91
Qualtech Groupequaltech-groupe.com

Companies optimize service offerings in research, analysis, consulting, and training to meet client demands, with innovative technical infrastructure and industrial pilots.

Food and Beverage Manufacturing 🇫🇷 Vandœuvre-lès-Nancy 134 1994
92
Groupe Candorgroupecandor.com

The company specializes in hygiene, cleanliness, and related services, emphasizing quality, human values, and employee development to satisfy clients

Facilities Services 🇫🇷 Val-de-Reuil 130 2015
93
CertiNergycertinergy.com

Mobilizes for and implements energy saving actions for all energy consumers, from individuals to large companies, funded by energy suppliers through energy saving certificates.

Environmental Services 🇫🇷 La Garenne-Colombes 129 2008
94
Groupe Rouge Vifgrouperougevif.fr

Advises on communication strategies, public and private territorial projects, and organizes events, focusing on human recognition and shared understanding across channels.

Advertising Services 🇫🇷 Versailles 114 1988
95
Actinvisionactinvision.com

Provides data analysis, visualization, and advanced analytics solutions, enabling data-driven culture and strategies for organizations, serving over 300 customers.

IT Services and IT Consulting 🇫🇷 Strasbourg 111 2014
96
Myonexmyonex.com

Global pharmaceutical packaging and logistics partner, specializing in clinical trial supply management, cold-chain solutions for ATMPs, and expert packaging services for health products

Pharmaceutical Manufacturing 🇫🇷 Reims 106 1998
97
SdVsdv.fr

Provides flexible content management, secure hosting, custom development, and domain management to support digital projects for media and institutions.

Technology, Information and Internet 🇫🇷 Strasbourg 105 1981
98
CEHTRAcehtra.com

A global leader in environmental and human toxicology, offering regulatory compliance services, innovative solutions, and strategic consulting for chemical safety

Environmental Services 🇫🇷 Cenon 105 2001
99
Lorex

Accounting and audit firm located in Montigny-lès-Metz providing expertise in accounting and statutory auditing services

Accounting 🇫🇷 Montigny-lès-Metz 101 1925
100
Digoradeep.eu

Expert in data management, supporting companies with digital transformation, infrastructure, maintenance, and innovation for availability, performance, and security.

IT Services and IT Consulting 🇫🇷 Strasbourg 100 1997

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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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