Boundless Bio BOLD Insider Ownership

Updated Oct 10, 2026

Over the trailing 12 months, BOLD insiders bought $1.52 million worth of shares (611.42K shares) and sold $94,191 worth (34.3K shares) in open-market trades.

• Boundless Bio's open-market purchases in the past 12 months came from one insider, and its sales from 2 insiders.
• Among BOLD insiders, Kevin Tang (10% owner) bought the most stock on the open market in the past 12 months: $1.52 million (611.42K shares), most recently on July 21, 2026.
• Conversely, Kevin Tang (10% owner) was BOLD's largest open-market seller in the past 12 months, with $54,351 of sales (18.3K shares); the latest was on August 26, 2026.
• Beyond open-market trades, insiders at Boundless Bio acquired 16K shares through option exercises and conversions in the last 12 months.
• Business Quant data puts insider holdings in BOLD at 4.57Mn shares across insiders' latest Form 4 filings, up 4.56% from 4.37Mn shares at the end of Q2 2026.
• By type of ownership, BOLD insiders hold all of their 4.57Mn shares indirectly.
• Holdings in Boundless Bio stock are reported by 3 insiders, the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• Boundless Bio's top three insider holders by shares held are Kevin Tang (10% owner, 2.84Mn shares), Kristina Burow (Director and 10% owner, 1.18Mn shares) and Jonathan E. Lim (Director, 550.91K shares).
• Kevin Tang holds 62.11% of the combined insider position in Boundless Bio.
• Institutions held 68.08% of Boundless Bio's outstanding shares in their Q2 2026 13F filings, insiders about 20.35% based on their latest Form 4 filings, and other investors, including the public, the remaining 11.57%.
• Over the trailing 12 months, 12 insiders reported transactions in BOLD stock across 18 Form 4 filings.
• Insider figures for BOLD include Form 4 filings through August 28, 2026.