As a result of the offer, Moody's has evaluated Castellum's rating and announced on 4 August that they affirm the company's current rating of Baa2 with a stable outlook, given Castellum's ambition to keep its loan-to-value ratio below 45% by the end of the year.

One of the announced synergies relate to financial costs amounting to approximately SEK 100 million a year, as a result of Castellum having a higher rating than Kungsleden and is thus benefiting from better financing terms and a greater depth in the capital market. With Moody's affirmation of Castellum's rating, the conditions for the realisation of synergies are strengthened as Kungsleden's loans expire.