The Colorado General Assembly is back in session and has introduced legislation (SB26-041) that, if enacted, would create new notification requirements and antitrust review processes for healthcare transactions. While Colorado already requires state-level notification of transactions that trigger federal notifications under the Hart-Scott-Rodino Act and notification of certain hospital transactions under the Hospital Transfer Act (“HTA”) of 2023, the proposed bill would create new notification requirements for a broader set of healthcare transactions, and would authorize the Colorado attorney general (“COAG”) to block or delay closing of transactions. The proposed bill also expands the scope of hospital transactions that must be reported under the HTA.