The District Court of The Hague recently clarified that a claimant in a cartel damages action does not have to disclose a settlement agreement with a defendant to the co-defendants. But given that all cartel members are jointly and severally liable for the harm caused by the cartel, the claimant should reduce its damages claim by the settling defendant's internal contribution share in the overall damage. If the settlement amount significantly exceeds that share, the claim will need to be reduced by the actual settlement amount to avoid overcompensation. The ruling clarifies the court's approach to contribution claims. It safeguards claimants from having to disclose their settlement agreements prematurely, while protecting cartel members from having to pay more than they are liable for.