SEC Form 4Coverage since Jun 25, 2026
$BOLD insider trading
Over the last 12 months, Boundless Bio insiders reported 6 buys totaling $1.5M and 2 sales totaling $80K across SEC Form 4 filings.
- Bought · 12m
- $1.5M 6 events
- Sold · 12m
- $80K 2 events
- Events · 12m
- 8 Form 4 filings, grouped
- Insiders · 12m
- 3 distinct reporters
- 10b5-1 share
- 0% pre-arranged plans
Side
Price · $BOLD · 12Mvia TradingView
Top insiders · 12m
TANG KEVIN—6× · $1.5M
CRANDELL KEITH—1× · $40K
ARCH Venture Fund IX, L.P.—1× · $40K
All insider trades
8 events
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Jul 21, 2026 | TANG KEVIN10% | ▲ Buy | 4,863 | $2.44 | $12K | +0.2% | 3 tranches · indirect |
| Jul 16, 2026 | TANG KEVIN10% | ▲ Buy | 63,969 | $2.43 | $156K | +2.3% | 3 tranches · indirect |
| Jul 13, 2026 | TANG KEVIN10% | ▲ Buy | 91,585 | $2.42 | $222K | +3.4% | 3 tranches · indirect |
| Jul 8, 2026 | TANG KEVIN10% | ▲ Buy | 57,210 | $2.48 | $142K | +2.2% | 3 tranches · indirect |
| Jul 2, 2026 | TANG KEVIN10% | ▲ Buy | 107,463 | $2.5 | $269K | +4.2% | 4 tranches · indirect |
| Jul 1, 2026 | CRANDELL KEITH10% | ▼ Sale | 16,000 | $2.49 | $40K | -100% | indirect |
| Jul 1, 2026 | ARCH Venture Fund IX, L.P.10% | ▼ Sale | 16,000 | $2.49 | $40K | -100% | indirect |
| Jun 29, 2026 | TANG KEVIN10% | ▲ Buy | 286,333 | $2.5 | $715K | +12.7% | 6 tranches · indirect |
About Form 4
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $BOLD feed.