BCSM Exits Heartflow (HTFL) on Competitive Concerns

Baron Capital, an investment management firm, disclosed in its Q2 2026 investor letter for the Baron SMID Cap ETF (BCSM) that it reduced its stake in Heartflow, Inc. (NASDAQ:HTFL), a medical technology company specializing in AI-driven solutions for diagnosing and managing coronary artery diseases. The ETF gained 15.62% (NAV) in the second quarter, trailing the Russell 2500 Growth Index's 24.02% return.

The fund's performance was primarily due to its underweight positioning in Momentum and Beta factors, as per MSCI's Barra factor attribution. The top 10 holdings of the fund made up 29.3% of its assets. Baron SMID Cap ETF attributed the decision to sell Heartflow, Inc. shares to growing concerns about competition in the market. The company offers software that analyzes CT scans of patients' coronary arteries, displaying calcification, plaque buildup, and blood flow quality in a 3D model.

While the fund acknowledges Heartflow's potential as an investment, it believes other AI stocks present more significant upside potential with lower downside risk.