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2026 Edition
Energy
Tier 3
11 firms ranked
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Tier 1

Arntzen Grette
8 practice areas
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BAHR
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EY
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KPMG
9 practice areas
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PwC
9 practice areas
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Selmer
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Thommessen
8 practice areas
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Tier 2

DLA Piper
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Deloitte
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Wiersholm
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Tier 3

CMS Kluge
7 practice areas
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General corporate tax
Tier 3
20 firms ranked
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Tier 1

Arntzen Grette
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BAHR
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Deloitte
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EY
9 practice areas
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PwC
9 practice areas
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Thommessen
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Wiersholm
8 practice areas
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Tier 2

Advokatfirmaet Bull AS
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Brækhus
5 practice areas
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DLA Piper
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KPMG
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Schjødt
3 practice areas
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Selmer
8 practice areas
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Tier 3

BDO
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CMS Kluge
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Haavind
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Ræder Bing
7 practice areas
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Wikborg Rein & Co
2 practice areas
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Tier 4

SANDS Advokatfirma DA
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Simonsen Vogt Wiig
2 practice areas
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Tax controversy
Tier 3
15 firms ranked
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Tier 1

BAHR
8 practice areas
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Selmer
8 practice areas
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Thommessen
8 practice areas
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Wiersholm
8 practice areas
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Tier 2

Advokatfirmaet Bull AS
5 practice areas
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Arntzen Grette
8 practice areas
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Brækhus
5 practice areas
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Deloitte
9 practice areas
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EY
9 practice areas
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Haavind
6 practice areas
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KPMG
9 practice areas
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Tier 3

CMS Kluge
7 practice areas
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DLA Piper
8 practice areas
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PwC
9 practice areas
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Ræder Bing
7 practice areas
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3 results3 results
Almost three-quarters of surveyed tax professionals are concerned about inaccurate AI outputs; in other news, Dentons hired a partner from CMS to lead its Belgian tax team
Long-running, high-value and complex enquiries are a significant reason for HM Revenue and Customs’s increased TP yield, experts suggest
Companies that master the DEMPE analysis of their intangibles stand to benefit from a greater economic return, writes Mohamed Haj Taieb, partner at CMS France
Vittoria Segre, partner at CMS Italy, reviews a range of TP topics discussed at the event, including financial transaction audits and permanent establishment issues
On a panel of advisers and tax authority representatives from a range of European jurisdictions, financial transactions were pinpointed as a key TP audit focus
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