Top-ranked

Our high standards of professional excellence are confirmed by reputable rating agencies and various law firm reviews.

Leading transaction firm

Our transaction practice includes both large and complex transactions, and a large number of transactions involving small and medium-sized businesses. The combination provides in-depth expertise and workability.

Thommessen’s practice within mergers and acquisitions (M&A) and equity market transactions (ECM) has been the market leader for many years, in terms of both the number of transactions and/or in market value.

M&A

Rank	Firm	M (EUR)	No. of deals
1	Thommessen	232,657	1,223
2	Wiersholm	186,021	1,091
3	BAHR	173,208	1,054
4	Schjødt	123,383	1,331
5	Wikborg Rein	117,663	1,064

Source: Mergermarket 01.01.2005–15.05.2025

ECM/IPO

Rank	Firm	M (EUR)	No. of deals
1	Thommessen	12,779	76
2	Schjødt	7,982	46
3	Wiersholm	7,491	53
4	BAHR	4,736	28
5	Wikborg Rein	3,760	28

Source: Mergermarket/Dealogic (Oslo Stock Exchange, Euronext Expand and Euronext Growth) 01.01.2008–15.05.2025

Testimonials

Thommessen has the capacity to take on tight deadlines, the creativity to fix problems and the ability to suggest alternative solutions where needed.

Chambers and Partners, 2025

Thommessen has good lawyers across a wide range of areas, which makes them the leading one-stop shop for transactions.

Legal 500, 2025

Standout for their timeliness, being ahead of the game, their self-confidence and their ability to challenge the deal team by sharing their own perspectives

IFLR1000, 2024