{"id":264,"date":"2024-12-13T16:17:47","date_gmt":"2024-12-13T15:17:47","guid":{"rendered":"https:\/\/wiersholm.no\/en\/people\/mgre\/"},"modified":"2025-10-03T17:35:44","modified_gmt":"2025-10-03T15:35:44","slug":"mgre","status":"publish","type":"employee","link":"https:\/\/wiersholm.no\/en\/people\/mgre\/","title":{"rendered":"Grenness, Marius"},"content":{"rendered":"<p>Marius has extensive experience in corporate taxation, with particular expertise in international tax law, Norwegian corporate taxation, EEA tax law, and transfer pricing. He assists clients with issues relating to structuring, cross-border activities, and tax clauses, where considerations regarding withholding tax and tax treaties are central. Marius also has broad experience with tax disputes and provides assistance throughout all phases of tax litigation and alternative dispute resolution, including settlement negotiations and requests for advance tax rulings (BFU).<\/p>\n<p>Through close collaboration with lawyers in other jurisdictions, he is able to offer comprehensive solutions to international matters. Marius maintains a strong commercial focus and has in-depth industry experience in shipping, offshore, petroleum, industry, renewable energy, as well as fisheries and aquaculture. He regularly gives professional lectures and publishes articles within his areas of expertise.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"editor_notices":[],"employee_title":"Managing Associate","employee_mobile":"+47 40 47 77 63","employee_landline":"+47 21 02 12 68","employee_email":"mgre@wiersholm.no","_employee_initials":"mgre","_employee_user_id":"5c2c89cbfd90963a06342479","_employee_cv_id":"5c2c89cbfd90963a0634247a","_employee_synced":"1759505725","employee_work_experiences":[{"description":"Managing Associate","employer":"Wiersholm","year_from":"2024"},{"description":"Legal Counsel (secondment)","employer":"Equinor","year_from":"2021"},{"description":"Senior Associate","employer":"Wiersholm","year_from":"2021"},{"description":"Associate","employer":"Wiersholm","year_from":"2018"}],"employee_educations":[{"degree":"Master of Law","school":"University of Oslo","year_to":"2017"},{"degree":"Partial studies","school":"Pennsylvania State University","year_to":"2017"},{"degree":"One-year study in psychology","school":"University of Bergen","year_to":"2012"},{"degree":"The Royal Norwegian Navy Officer Candidate School","school":"KNM HH","year_to":"2008"}],"employee_positions":[],"employee_honors_awards":[],"employee_project_experiences":[],"employee_recommendations":[]},"authorisation_tax":[7],"award_tax":[],"competence_area_tax":[32,51,15,21,48],"role_tax":[56],"class_list":["post-264","employee","type-employee","status-publish","hentry","authorisation_tax-advokat","competence_area_tax-commercial-contracts","competence_area_tax-dispute-resolution","competence_area_tax-eu-and-eea-law","competence_area_tax-renewable-energy-and-infrastructure","competence_area_tax-tax-and-duties","role_tax-managing-associate"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Grenness, Marius - Law firm Wiersholm<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wiersholm.no\/en\/people\/mgre\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Grenness, Marius\" \/>\n<meta property=\"og:description\" content=\"Marius has extensive experience in corporate taxation, with particular expertise in international tax law, Norwegian corporate taxation, EEA tax law, and transfer pricing. He assists clients with issues relating to structuring, cross-border activities, and tax clauses, where considerations regarding withholding tax and tax treaties are central. Marius also has broad experience with tax disputes and [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/wiersholm.no\/en\/people\/mgre\/\" \/>\n<meta property=\"og:site_name\" content=\"Law firm Wiersholm\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-03T15:35:44+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/wiersholm.no\/en\/people\/mgre\/\",\"url\":\"https:\/\/wiersholm.no\/en\/people\/mgre\/\",\"name\":\"Grenness, Marius - Law firm Wiersholm\",\"isPartOf\":{\"@id\":\"https:\/\/wiersholm.no\/en\/#website\"},\"datePublished\":\"2024-12-13T15:17:47+00:00\",\"dateModified\":\"2025-10-03T15:35:44+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/wiersholm.no\/en\/people\/mgre\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/wiersholm.no\/en\/people\/mgre\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/wiersholm.no\/en\/people\/mgre\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/wiersholm.no\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Our team\",\"item\":\"https:\/\/wiersholm.no\/en\/people\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Grenness, Marius\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/wiersholm.no\/en\/#website\",\"url\":\"https:\/\/wiersholm.no\/en\/\",\"name\":\"Law firm Wiersholm\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/wiersholm.no\/en\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Grenness, Marius - Law firm Wiersholm","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/wiersholm.no\/en\/people\/mgre\/","og_locale":"en_US","og_type":"article","og_title":"Grenness, Marius","og_description":"Marius has extensive experience in corporate taxation, with particular expertise in international tax law, Norwegian corporate taxation, EEA tax law, and transfer pricing. He assists clients with issues relating to structuring, cross-border activities, and tax clauses, where considerations regarding withholding tax and tax treaties are central. Marius also has broad experience with tax disputes and [&hellip;]","og_url":"https:\/\/wiersholm.no\/en\/people\/mgre\/","og_site_name":"Law firm Wiersholm","article_modified_time":"2025-10-03T15:35:44+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/wiersholm.no\/en\/people\/mgre\/","url":"https:\/\/wiersholm.no\/en\/people\/mgre\/","name":"Grenness, Marius - Law firm Wiersholm","isPartOf":{"@id":"https:\/\/wiersholm.no\/en\/#website"},"datePublished":"2024-12-13T15:17:47+00:00","dateModified":"2025-10-03T15:35:44+00:00","breadcrumb":{"@id":"https:\/\/wiersholm.no\/en\/people\/mgre\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/wiersholm.no\/en\/people\/mgre\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/wiersholm.no\/en\/people\/mgre\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/wiersholm.no\/en\/"},{"@type":"ListItem","position":2,"name":"Our team","item":"https:\/\/wiersholm.no\/en\/people\/"},{"@type":"ListItem","position":3,"name":"Grenness, Marius"}]},{"@type":"WebSite","@id":"https:\/\/wiersholm.no\/en\/#website","url":"https:\/\/wiersholm.no\/en\/","name":"Law firm Wiersholm","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/wiersholm.no\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/wiersholm.no\/en\/wp-json\/wp\/v2\/employee\/264","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wiersholm.no\/en\/wp-json\/wp\/v2\/employee"}],"about":[{"href":"https:\/\/wiersholm.no\/en\/wp-json\/wp\/v2\/types\/employee"}],"wp:attachment":[{"href":"https:\/\/wiersholm.no\/en\/wp-json\/wp\/v2\/media?parent=264"}],"wp:term":[{"taxonomy":"authorisation_tax","embeddable":true,"href":"https:\/\/wiersholm.no\/en\/wp-json\/wp\/v2\/authorisation_tax?post=264"},{"taxonomy":"award_tax","embeddable":true,"href":"https:\/\/wiersholm.no\/en\/wp-json\/wp\/v2\/award_tax?post=264"},{"taxonomy":"competence_area_tax","embeddable":true,"href":"https:\/\/wiersholm.no\/en\/wp-json\/wp\/v2\/competence_area_tax?post=264"},{"taxonomy":"role_tax","embeddable":true,"href":"https:\/\/wiersholm.no\/en\/wp-json\/wp\/v2\/role_tax?post=264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}