InsiderCluster

BOLD

NasdaqGS

Boundless Bio, Inc.

$2.48
▼ -0.01 (-0.40%)

Price

-1.00% over 1D

Key statistics

Previous close$2.49
Day range2.44 – 2.51
52-week range0.96 – 2.79
Volume102.93K
CurrencyUSD
ExchangeNasdaqGS
Crowd sentiment
30Bearish

Insider activity

SEC EDGAR ↗
Open-mkt buys
19
$1,503,228.52
Open-mkt sells
2
$79,680.00
Net flow
+1.42M
21 open-market trades

Showing 28 recent filings. 7 other (grants, option exercises, gifts, tax withholding) are listed below but excluded from buy/sell flow.

InsiderTypeSharesPriceValueDate
TANG KEVIN
10% Owner
Buy (open market)43.88K$2.43$106,623.542026-07-14
TANG KEVIN
10% Owner
Buy (open market)1.6K$2.44$3,904.002026-07-15
TANG KEVIN
10% Owner
Buy (open market)18.49K$2.44$45,118.042026-07-16
TANG KEVIN
10% Owner
Buy (open market)7$2.48$17.362026-07-09
TANG KEVIN
10% Owner
Buy (open market)43.37K$2.43$105,381.812026-07-10
TANG KEVIN
10% Owner
Buy (open market)48.21K$2.42$116,670.622026-07-13
TANG KEVIN
10% Owner
Buy (open market)27.06K$2.49$67,384.382026-07-06
TANG KEVIN
10% Owner
Buy (open market)15.81K$2.48$39,208.802026-07-07
TANG KEVIN
10% Owner
Buy (open market)14.34K$2.46$35,271.482026-07-08
CRANDELL KEITH
10% Owner
Option exercise16K$1.03$16,480.002026-07-01
CRANDELL KEITH
10% Owner
Sell (open market)16K$2.49$39,840.002026-07-01
CRANDELL KEITH
10% Owner
Option exercise16K$0.00—2026-07-01
ARCH Venture Fund IX, L.P.
10% Owner
Option exercise16K$1.03$16,480.002026-07-01
ARCH Venture Fund IX, L.P.
10% Owner
Sell (open market)16K$2.49$39,840.002026-07-01
ARCH Venture Fund IX, L.P.
10% Owner
Option exercise16K$0.00—2026-07-01
TANG KEVIN
10% Owner
Buy (open market)25.93K$2.54$65,862.202026-06-30
TANG KEVIN
10% Owner
Buy (open market)100$2.50$250.002026-06-30
TANG KEVIN
10% Owner
Buy (open market)71.61K$2.49$178,313.882026-07-01
TANG KEVIN
10% Owner
Buy (open market)9.82K$2.49$24,454.292026-07-02
TANG KEVIN
10% Owner
Buy (open market)145.88K$2.48$361,782.402026-06-25
TANG KEVIN
10% Owner
Buy (open market)510$2.56$1,305.602026-06-25
TANG KEVIN
10% Owner
Buy (open market)75.05K$2.55$191,369.852026-06-26
TANG KEVIN
10% Owner
Buy (open market)134$2.54$340.362026-06-26
TANG KEVIN
10% Owner
Buy (open market)63.99K$2.47$158,042.952026-06-29
TANG KEVIN
10% Owner
Buy (open market)777$2.48$1,926.962026-06-29
Whiting Nancy
Director
Grant / award32K$0.00—2026-06-15
Lim Jonathan E
Director
Grant / award48K$0.00—2026-06-15
Christensen James
Director
Grant / award32K$0.00—2026-06-15

Source: SEC EDGAR Forms 4/4A (CIK 1782303). Click an insider to open the original filing.

Social sentiment

30
Bearish

Volume-weighted across live social sources

StockTwitsLIVE
3 bull307 bear
Recent posts
@Shawshank_book_keeper· StockTwits4d ago

$BOLD add this to the win list!

@OnlyFibs· StockTwits5d ago

INSIDER BUY WATCH — biggest buys this week $GGAL — $2.16M across 3 buys by insider Moret Silvestre Vila (Jul 7-8) $PRQR — $499.5K across 2 buys by CEO Daniel de Boer, doubling his stake twice in a week (Jul 7 & 9) $BOLD — $364K across 6 separate buys by insider Kevin Tang, buying almost daily (Jul 6-13) $YEXT — $398K single buy by insider Daniel Englander, +117% stake increase (Jul 13)

@AZOZ· StockTwits5d ago

$CYAB $BOLD Insider trading!

@JuggernautRaider· StockTwits6d ago

$BOLD told you all (barf)

@AlertsAndNews· StockTwitsJul 9

$BOLD another Tang Capital add here TANG Capital Management LLC (10%+) purchased 57,210 shares at an average price of $2.48 (Form 4).

@JuggernautRaider· StockTwitsJul 7

$BOLD

@CosmicMiner· StockTwitsJul 5

Notable Insider Buys This Week: $BBD: $2.0M across 2 buys, Jul 1 $NVCT: $1.17M combined across 2 buys (2 insiders), Jun 30 $BOLD: $984K across 10 separate buys by one Chairman $CREX: $800K combined across 2 buys (CEO + CFO same day), Jun 30 $MDV: $163K across 4 buys by CEO (steady accumulation) "A lot of great opportunities if you know where to look. The battle map has been shared in the community! Are you going to miss out again?"

@AlertsAndNews· StockTwitsJul 3

$BOLD TANG Capital Management LLC (10%+) purchased 107,463 shares at an average price of $2.50 (Form 4). Another form 4 here.

@JuggernautRaider· StockTwitsJul 1

$BOLD $ATRA i cannot wait to short these turds. Flush the toilet!🚽

@JuggernautRaider· StockTwitsJun 30

$BOLD @race2zerodo you want to short this dying company?

@AlertsAndNews· StockTwitsJun 30

$BOLD quite the 10%+er buy TANG Capital Management LLC (10%+) purchased 286,333 shares at an average price of $2.50 (Form 4).

@ikkydiphoenix· StockTwitsJun 30

$BOLD https://ca.investing.com/news/stock-market-news/tang-capital-management-acquires-714768-of-boundless-bio-stock-93CH-4712818

Latest news

Why Did BOLD, BLZE, QNT Stocks Surge To 52-Week Highs Today

Stocktwits·Jun 24Neutral

Sector Update: Healthcare Stocks Higher Late Afternoon

MT Newswires·Jun 23Neutral

Sector Update: Healthcare Stocks Advance in Afternoon Trading

MT Newswires·Jun 23Neutral

BOLD Stock Is Up 90% — Here's What's Behind The Biggest Rally In Company History

Stocktwits·Jun 23Bullish

Top Midday Gainers

MT Newswires·Jun 23Neutral

BC-Most Active Stocks

Associated Press·Jun 23Neutral

Sector Update: Healthcare Stocks Mixed Pre-Bell Tuesday

MT Newswires·Jun 23Neutral

Boundless Bio, Serapha Bio Sign Merger Deal With $230 Million Private Placement

MT Newswires·Jun 23Neutral

Boundless Bio and Serapha Bio Announce Merger Agreement and $230 Million Concurrent Private Placement

GlobeNewswire·Jun 23Neutral

Boundless Bio Reports First Quarter 2026 Financial Results and Business Highlights

GlobeNewswire·May 8Neutral

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