Boundless Bio, Inc. (BOLD) insider trading
Boundless Bio, Inc. insiders have made 3 open-market purchases worth $427k since Oct 20, 2026, by 1 insider. The latest: Kevin Tang (10% owner) bought $26k, filed Oct 29, 2026, scored 16 out of 100. The biggest: $350k by Kevin Tang, filed Oct 20, 2026.
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Insider purchases
| Filed | Insider | Stake | Score | Bought | 1 week | 1 month |
|---|---|---|---|---|---|---|
| Oct 29 Form 4 (opens sec.gov) |
Kevin Tang10% owner10% owner | +0% stake | 16 | $26k 10,707 at $2.40 |
waiting | waiting |
| Oct 26 Form 4 (opens sec.gov) |
Kevin Tang10% owner10% owner | +1% stake | 16 | $52k 21,640 at $2.39 |
waiting | waiting |
| Oct 20 Form 4 (opens sec.gov) |
Kevin Tang10% owner10% owner | +5% stake | 23 | $350k 149,474 at $2.34 |
+2.5% | waiting |
Track record (hypothetical): a week after the filing, these buys averaged +2.5% (100% up, 1 measured).
Insiders who bought BOLD
- Kevin Tang 10% owner
Questions
Are insiders buying BOLD stock?
Yes. In the last 90 days, 3 open-market purchases were filed, worth $427k.
Who bought BOLD stock most recently?
Kevin Tang, 10% owner, bought 10,707 shares for $26k (Form 4 (opens sec.gov), filed Oct 29, 2026).
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Insiders are also buying, same industry
Data as of Oct 29, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer