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BOLD insider trading

Boundless Bio, Inc. — open-market insider buys and $1M+ sells from SEC Forms 3, 4 and 5.
Insider buys · 24 mo
6
Bought · 24 mo
$1.5M
Buys · last 90 days
6 · $1.5M
Most recent buy
2026-07-21

Recent insider filings

FiledInsiderTypeSharesPriceValue
2026-07-21TANG CAPITAL MANAGEMENT LLC
10% owner
Bought4,863$2.44$12k
2026-07-16TANG CAPITAL MANAGEMENT LLC
10% owner
Bought63,969$2.43$156k
2026-07-13TANG CAPITAL MANAGEMENT LLC
10% owner
Bought91,585$2.42$222k
2026-07-08TANG CAPITAL MANAGEMENT LLC
10% owner
Bought57,210$2.48$142k
2026-07-02TANG CAPITAL MANAGEMENT LLC
10% owner
Bought107,463$2.50$269k
2026-06-29TANG CAPITAL MANAGEMENT LLC
10% owner
Bought286,333$2.50$715k

Most active insider buyers

InsiderRoleBuysTotal bought
TANG CAPITAL MANAGEMENT LLC10% owner6$1.5M

See BOLD on the chart

Every insider buy and sell for BOLD plotted on the price, the full two-year history, cluster scores and daily updates — in the members area, $29/month. A free quarterly sample of the whole dataset needs no account.

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Data from the SEC EDGAR ownership filings, refreshed daily. Only open-market purchases (transaction code P) and sales of $1M or more are shown; grants, option exercises and tax withholding are excluded because they run on schedules set years earlier. Not investment advice.