BOLDBoundless Bio, Inc.
Insider trading & SEC Form 4 activity — last 90 days. Latest filing: 2026-07-21.
Insider buys (90d)
$2.49M
Insider sells (90d)
$517.9K
Net flow
$1.97M
Filings
7
Buy transactions
36
Sell transactions
13
Distinct insiders
15
Last close (cached)
$2.52
as of 2026-07-23
1d return
+0.0%
5d return
+1.2%
1m return
-3.1%
Top insiders trading BOLD (90d)
Recent transactions (50)
| Filed | Txn date | Insider | Code | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-07-21 | 2026-07-21 | TANG KEVIN | Buy | 2,975 | $2.44 | $7.3K | open → |
| 2026-07-21 | 2026-07-21 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 2,975 | $2.44 | $7.3K | open → |
| 2026-07-21 | 2026-07-20 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 1,623 | $2.44 | $4.0K | open → |
| 2026-07-21 | 2026-07-20 | TANG KEVIN | Buy | 1,623 | $2.44 | $4.0K | open → |
| 2026-07-21 | 2026-07-17 | TANG KEVIN | Buy | 265 | $2.44 | $646.60 | open → |
| 2026-07-21 | 2026-07-17 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 265 | $2.44 | $646.60 | open → |
| 2026-07-17 | 2026-07-16 | TANG KEVIN | Buy | 18,491 | $2.44 | $45.1K | open → |
| 2026-07-17 | 2026-07-16 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 18,491 | $2.44 | $45.1K | open → |
| 2026-07-17 | 2026-07-15 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 1,600 | $2.44 | $3.9K | open → |
| 2026-07-17 | 2026-07-15 | TANG KEVIN | Buy | 1,600 | $2.44 | $3.9K | open → |
| 2026-07-17 | 2026-07-14 | TANG KEVIN | Buy | 43,878 | $2.43 | $106.6K | open → |
| 2026-07-17 | 2026-07-14 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 43,878 | $2.43 | $106.6K | open → |
| 2026-07-13 | 2026-07-13 | TANG KEVIN | Buy | 48,211 | $2.42 | $116.7K | open → |
| 2026-07-13 | 2026-07-13 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 48,211 | $2.42 | $116.7K | open → |
| 2026-07-13 | 2026-07-10 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 43,367 | $2.43 | $105.4K | open → |
| 2026-07-13 | 2026-07-10 | TANG KEVIN | Buy | 43,367 | $2.43 | $105.4K | open → |
| 2026-07-13 | 2026-07-09 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 7 | $2.48 | $17.36 | open → |
| 2026-07-13 | 2026-07-09 | TANG KEVIN | Buy | 7 | $2.48 | $17.36 | open → |
| 2026-07-09 | 2026-07-08 | TANG KEVIN | Buy | 14,338 | $2.46 | $35.3K | open → |
| 2026-07-09 | 2026-07-08 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 14,338 | $2.46 | $35.3K | open → |
| 2026-07-09 | 2026-07-07 | TANG KEVIN | Buy | 15,810 | $2.48 | $39.2K | open → |
| 2026-07-09 | 2026-07-07 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 15,810 | $2.48 | $39.2K | open → |
| 2026-07-09 | 2026-07-06 | TANG KEVIN | Buy | 27,062 | $2.49 | $67.4K | open → |
| 2026-07-09 | 2026-07-06 | TANG CAPITAL MANAGEMENT LLC 10% | Buy | 27,062 | $2.49 | $67.4K | open → |
| 2026-07-06 | 2026-07-01 | CRANDELL KEITH 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | BYBEE CLINTON 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | NELSEN ROBERT 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | GILLIS STEVEN 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | Burow Kristina 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | CRANDELL KEITH 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | Burow Kristina 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | GILLIS STEVEN 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | NELSEN ROBERT 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | BYBEE CLINTON 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Partners X, LLC 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Partners IX, LLC 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Partners IX Overage, L.P. 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Partners X Overage, L.P. 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Fund IX, L.P. 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Fund IX Overage, L.P. 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Fund X Overage, L.P. 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Partners IX, L.P. 10% | Sale | 16,000 | $2.49 | $39.8K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Partners IX Overage, L.P. 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Partners IX, L.P. 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Fund X Overage, L.P. 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Fund IX Overage, L.P. 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Fund IX, L.P. 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Partners IX, LLC 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Partners X Overage, L.P. 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
| 2026-07-06 | 2026-07-01 | ARCH Venture Partners X, LLC 10% | Exer. | 16,000 | $1.03 | $16.5K | open → |
Other tickers these insiders trade
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