Hummingbird announced its acquisition of Quantimon on October 28, 2026, as it works to connect machine-learning risk detection with compliance investigations. Financial terms were not disclosed. Quantimon’s team has joined Hummingbird to build closed-loop transaction monitoring capabilities, while co-founder and CEO Ben Duranske will advise during the transition. The companies had been commercial partners for approximately a year. The proposed feedback loop would use Hummingbird’s structured records of alert resolutions to retrain Quantimon’s detection models. Quantimon claims its algorithms can reduce false-positive alerts by up to 67%; the research provided does not establish how that figure was measured. Its federated learning network is designed to help institutions identify emerging financial crime patterns without sharing underlying customer or transaction data. The deal is Hummingbird’s second acquisition, following its purchase of data automation and integration startup LogicLoop in September 2024.