• ARCH Venture Fund IX reported a 16,000-share sale in Boundless Bio common stock on July 1, 2026 at $2.49.
• The filing also showed a 16,000-share acquisition on the same day at $1.03, leaving no shares from that line item.
• ARCH Venture Fund IX reported indirect holdings of 2,694,095 shares following the transactions.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Boundless Bio Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001012975-26-000621), on July 06, 2026, and is solely responsible for the information contained therein.