BOLD insider trading — Boundless Bio, Inc.
Over the last 90 days, insiders at Boundless Bio, Inc. (BOLD) made 3 open-market purchases worth $12K and 1 open-market sale worth $54K, making them net sellers by $42K. The largest purchase was by Tang Kevin, Tang Capital Management Llc (10% Owner), who bought 2,975 shares for $7K on Jul 21, 2026. The largest sale was by Tang Kevin, Tang Capital Management Llc (10% Owner), who sold 18,300 shares for $54K on Aug 26, 2026.
Updated Oct 16, 2026.
Recent BOLD insider transactions
Every Form 4 filed by Boundless Bio, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 26, 2026 | Tang Kevin, Tang Capital Management Llc | 10% Owner | S · Sale | Indirect | 18,300 | $2.97 | $54K | Form 4 |
| Jul 21, 2026 | Tang Kevin, Tang Capital Management Llc | 10% Owner | P · Purchase | Indirect | 2,975 | $2.44 | $7K | Form 4 |
| Jul 20, 2026 | Tang Kevin, Tang Capital Management Llc | 10% Owner | P · Purchase | Indirect | 1,623 | $2.44 | $4K | Form 4 |
| Jul 17, 2026 | Tang Kevin, Tang Capital Management Llc | 10% Owner | P · Purchase | Indirect | 265 | $2.44 | $647 | Form 4 |
BOLD insider trading FAQ
Are insiders buying BOLD stock?
Yes. In the last 90 days, Boundless Bio, Inc. insiders made 3 open-market purchases totaling $12K, and 1 open-market sale totaling $54K. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading BOLD?
Recent buyers: Tang Kevin, Tang Capital Management Llc. Recent sellers: Tang Kevin, Tang Capital Management Llc.
Where does BOLD insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.