The partners of ATRIUM Partners have worked in the financial sector since the 1980s. In their previous positions they have been involved in more than 300 transactions with a total deal value exceeding DKK 300 billion (Euro 40 billion). Furthermore, the partners have been involved in more than 6 out of 10 listings on the Copenhagen Stock Exchange since the early 1990s.
Below is shown a selection of companies that the partners of ATRIUM Partners have worked with in their current and previous positions:
| 3i | Dansk Erhvervsudvikling | Microtronic | Statens Serumsinstitut |
| Alm. Brand Bank | Daugaard | Monarch | Søndagsavisen |
| Altor | EKR Eksportkredit | Navision (Microsoft) | TDC |
| Arla | Forsikringsselskab | NCC | Telia |
| Arovit | Ementor | NEG Micon | Telmore |
| Aston Group | EQT Eurocom Industries | Neurosearch | Torm |
| Atea | FöreningsSparbanken | Nordea | Tryg |
| Avis | Fullrate | Nordic Capital | Tvilum-Scanbirk |
| Axcel | Færch | Nordlux | UBS Private Equity |
| B&O | Glunz & Jensen | Nordzucker | Vest-Wood |
| Bavarian Nordic | GN Store Nord | Norske skog Novo Nordisk | Victoria Properties |
| Berendsen Components | Green Wind Energy | Novozymes | Wessel & Vett |
| Bonnier Group | Group 4 Falck | OMX | ØK |
| Bonus Energy | H&B Capital | Pharmexa | |
| Brdr. Klee | Hermes | Potagua | |
| Brightpoint | Hilton Group | R98 | |
| Carli Gry | Hjem-Is | Radisson SAS Hotels | |
| Coloplast | IBM | Rationel Vinduer | |
| Columbus IT Partner | Industri Kapital | RKI Kredit Information | |
| Combus | ISS | RTX Telecom | |
| Contex | ITH | SAS | |
| Coop Norden | J. Lauritzen | Satair | |
| CVC | Jacob Holm | Scandlines | |
| DAC Data | Københavns Lufthavne | Schou & Co | |
| Danionics | LM Glasfiber | SimCorp | |
| Danisco Foods | Maconomy | Skamol |