BOLD insider buying
1 cluster buyBoundless Bio, Inc.
When two or more insiders at Boundless Bio, Inc. buy BOLD in a qualifying detection window, the grouped purchases provide a starting point for further research. Below is every cluster we've detected in BOLD plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- Apr 2 – Apr 2, 2024Detected Apr 2, 20244 insidersTotal bought$14.6MMarket cap$55.7M
All notable open-market buys in BOLD
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Nov 5, 2026 | 10% Owner | 8,390 | $2.40 | $20.1K | SEC ↗ |
| Nov 4, 2026 | 10% Owner | 517 | $2.40 | $1.2K | SEC ↗ |
| Nov 3, 2026 | 10% Owner | 2,255 | $2.40 | $5.4K | SEC ↗ |
| Oct 27, 2026 | 10% Owner | 10,707 | $2.40 | $25.7K | SEC ↗ |
| Oct 26, 2026 | 10% Owner | 9,606 | $2.38 | $22.9K | SEC ↗ |
| Oct 23, 2026 | 10% Owner | 6,234 | $2.38 | $14.8K | SEC ↗ |
| Oct 22, 2026 | 10% Owner | 5,800 | $2.40 | $13.9K | SEC ↗ |
| Oct 20, 2026 | 10% Owner | 220 | $2.37 | $521.4 | SEC ↗ |
| Oct 19, 2026 | 10% Owner | 18,279 | $2.33 | $42.6K | SEC ↗ |
| Oct 19, 2026 | 10% Owner | 12,790 | $2.34 | $29.9K | SEC ↗ |
| Oct 16, 2026 | 10% Owner | 118,185 | $2.34 | $276.6K | SEC ↗ |
| Jul 21, 2026 | 10% Owner | 2,975 | $2.44 | $7.3K | SEC ↗ |
| Jul 20, 2026 | 10% Owner | 1,623 | $2.44 | $4.0K | SEC ↗ |
| Jul 17, 2026 | 10% Owner | 265 | $2.44 | $646.6 | SEC ↗ |
| Jul 16, 2026 | 10% Owner | 18,491 | $2.44 | $45.1K | SEC ↗ |
| Jul 15, 2026 | 10% Owner | 1,600 | $2.44 | $3.9K | SEC ↗ |
| Jul 14, 2026 | 10% Owner | 43,878 | $2.43 | $106.6K | SEC ↗ |
| Jul 13, 2026 | 10% Owner | 48,211 | $2.42 | $116.7K | SEC ↗ |
| Jul 10, 2026 | 10% Owner | 43,367 | $2.43 | $105.4K | SEC ↗ |
| Jul 9, 2026 | 10% Owner | 7 | $2.48 | $17.4 | SEC ↗ |
| Jul 8, 2026 | 10% Owner | 14,338 | $2.46 | $35.3K | SEC ↗ |
| Jul 7, 2026 | 10% Owner | 15,810 | $2.48 | $39.2K | SEC ↗ |
| Jul 6, 2026 | 10% Owner | 27,062 | $2.49 | $67.4K | SEC ↗ |
| Jul 1, 2026 | 10% Owner | 71,612 | $2.49 | $178.3K | SEC ↗ |
| Jun 29, 2026 | 10% Owner | 63,985 | $2.47 | $158.0K | SEC ↗ |
BOLD insider buying — FAQ
- Are insiders buying BOLD stock?
- Yes — 5 distinct insiders have bought BOLD (Boundless Bio, Inc.) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was Nov 5, 2026.
- How much BOLD stock have insiders bought?
- Insiders have bought a combined $16.5M of BOLD across 35 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in BOLD?
- A cluster buy is two or more distinct Boundless Bio, Inc. insiders — officers, directors, or 10% owners — each buying BOLD on the open market within a rolling window. BOLD has 1 detected cluster buy to date.
- Where does this BOLD insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in BOLD
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy BOLD within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Transactions link to official filings; prices and market capitalizations may be cached market data. Read our methodology and data limits before interpreting the figures. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding BOLD.