BOLD

Boundless Bio, Inc.

Insider trading activity for Boundless Bio, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

+$1.4M

net buying

Bought(22 · 1 insiders): $1.5M
Sold(2 · 2 insiders): $79.7K

Past 6 months

+$1.4M

net buying

Bought(22 · 1 insiders): $1.5M
Sold(2 · 2 insiders): $79.7K

Past 12 months

+$1.4M

net buying

Bought(22 · 1 insiders): $1.5M
Sold(2 · 2 insiders): $79.7K

Transaction history

The 32 most recent Form 4 transactions.

Open in screener →

Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Jul 21	Tang Kevin	10% Owner	PBUY	2,975	$2.44	$7.3K	+0.1%	Open the original filing on SEC.gov
Jul 20	Tang Kevin	10% Owner	PBUY	1,623	$2.44	$4K	+<0.1%	Open the original filing on SEC.gov
Jul 17	Tang Kevin	10% Owner	PBUY	265	$2.44	$647	+<0.1%	Open the original filing on SEC.gov
Jul 16	Tang Kevin	10% Owner	PBUY	18,491	$2.44	$45.1K	+0.7%	Open the original filing on SEC.gov
Jul 15	Tang Kevin	10% Owner	PBUY	1,600	$2.44	$3.9K	+<0.1%	Open the original filing on SEC.gov
Jul 14	Tang Kevin	10% Owner	PBUY	43,878	$2.43	$106.6K	+1.6%	Open the original filing on SEC.gov
Jul 13	Tang Kevin	10% Owner	PBUY	48,211	$2.42	$116.7K	+1.8%	Open the original filing on SEC.gov
Jul 10	Tang Kevin	10% Owner	PBUY	43,367	$2.43	$105.4K	+1.6%	Open the original filing on SEC.gov
Jul 9	Tang Kevin	10% Owner	PBUY	7	$2.48	$17	0.0%	Open the original filing on SEC.gov
Jul 8	Tang Kevin	10% Owner	PBUY	14,338	$2.46	$35.3K	+0.5%	Open the original filing on SEC.gov
Jul 7	Tang Kevin	10% Owner	PBUY	15,810	$2.48	$39.2K	+0.6%	Open the original filing on SEC.gov
Jul 6	Tang Kevin	10% Owner	PBUY	27,062	$2.49	$67.4K	+1.0%	Open the original filing on SEC.gov
Jul 2	Tang Kevin	10% Owner	PBUY	9,821	$2.49	$24.5K	+0.4%	Open the original filing on SEC.gov
Jul 1	Tang Kevin	10% Owner	PBUY	71,612	$2.49	$178.3K	+2.8%	Open the original filing on SEC.gov
Jul 1	Crandell Keith	10% Owner	MEXER◆	16,000	—	—	—	Open the original filing on SEC.gov
Jul 1	Crandell Keith	10% Owner	SSELL	16,000	$2.49	$39.8K	-100.0%	Open the original filing on SEC.gov
Jul 1	Crandell Keith	10% Owner	MEXER	16,000	$1.03	$16.5K	—	Open the original filing on SEC.gov
Jul 1	ARCH Venture Fund IX,…	10% Owner	MEXER◆	16,000	—	—	—	Open the original filing on SEC.gov
Jul 1	ARCH Venture Fund IX,…	10% Owner	SSELL	16,000	$2.49	$39.8K	-100.0%	Open the original filing on SEC.gov
Jul 1	ARCH Venture Fund IX,…	10% Owner	MEXER	16,000	$1.03	$16.5K	—	Open the original filing on SEC.gov
Jun 30	Tang Kevin	10% Owner	PBUY	100	$2.50	$250	0.0%	Open the original filing on SEC.gov
Jun 30	Tang Kevin	10% Owner	PBUY	25,930	$2.54	$65.9K	+1.0%	Open the original filing on SEC.gov
Jun 29	Tang Kevin	10% Owner	PBUY	777	$2.48	$1.9K	+<0.1%	Open the original filing on SEC.gov
Jun 29	Tang Kevin	10% Owner	PBUY	63,985	$2.47	$158K	+2.6%	Open the original filing on SEC.gov
Jun 26	Tang Kevin	10% Owner	PBUY	134	$2.54	$340	+<0.1%	Open the original filing on SEC.gov
Jun 26	Tang Kevin	10% Owner	PBUY	75,047	$2.55	$191.4K	+3.1%	Open the original filing on SEC.gov
Jun 25	Tang Kevin	10% Owner	PBUY	510	$2.56	$1.3K	+<0.1%	Open the original filing on SEC.gov
Jun 25	Tang Kevin	10% Owner	PBUY	145,880	$2.48	$361.8K	+6.5%	Open the original filing on SEC.gov
Jun 15	Whiting Nancy	Director	AGRANT◆	32,000	—	—	—	Open the original filing on SEC.gov
Jun 15	Lim Jonathan E	Director	AGRANT◆	48,000	—	—	—	Open the original filing on SEC.gov
Jun 15	Christensen James	Director	AGRANT◆	32,000	—	—	—	Open the original filing on SEC.gov
Jun 15	Lew Jennifer	Director	AGRANT◆	32,000	—	—	—	Open the original filing on SEC.gov

PBUY$7.3K

Tang Kevin · 10% OwnerJul 21

2,975 sh @ $2.44 · +0.1% own

PBUY$4K

Tang Kevin · 10% OwnerJul 20

1,623 sh @ $2.44 · +<0.1% own

PBUY$647

Tang Kevin · 10% OwnerJul 17

265 sh @ $2.44 · +<0.1% own

PBUY$45.1K

Tang Kevin · 10% OwnerJul 16

18,491 sh @ $2.44 · +0.7% own

PBUY$3.9K

Tang Kevin · 10% OwnerJul 15

1,600 sh @ $2.44 · +<0.1% own

PBUY$106.6K

Tang Kevin · 10% OwnerJul 14

43,878 sh @ $2.43 · +1.6% own

PBUY$116.7K

Tang Kevin · 10% OwnerJul 13

48,211 sh @ $2.42 · +1.8% own

PBUY$105.4K

Tang Kevin · 10% OwnerJul 10

43,367 sh @ $2.43 · +1.6% own

PBUY$17

Tang Kevin · 10% OwnerJul 9

7 sh @ $2.48 · 0.0% own

PBUY$35.3K

Tang Kevin · 10% OwnerJul 8

14,338 sh @ $2.46 · +0.5% own

PBUY$39.2K

Tang Kevin · 10% OwnerJul 7

15,810 sh @ $2.48 · +0.6% own

PBUY$67.4K

Tang Kevin · 10% OwnerJul 6

27,062 sh @ $2.49 · +1.0% own

PBUY$24.5K

Tang Kevin · 10% OwnerJul 2

9,821 sh @ $2.49 · +0.4% own

PBUY$178.3K

Tang Kevin · 10% OwnerJul 1

71,612 sh @ $2.49 · +2.8% own

MEXER◆—

Crandell Keith · 10% OwnerJul 1

16,000 sh

SSELL$39.8K

Crandell Keith · 10% OwnerJul 1

16,000 sh @ $2.49 · -100.0% own

MEXER$16.5K

Crandell Keith · 10% OwnerJul 1

16,000 sh @ $1.03

MEXER◆—

ARCH Venture Fund IX,… · 10% OwnerJul 1

16,000 sh

SSELL$39.8K

ARCH Venture Fund IX,… · 10% OwnerJul 1

16,000 sh @ $2.49 · -100.0% own

MEXER$16.5K

ARCH Venture Fund IX,… · 10% OwnerJul 1

16,000 sh @ $1.03

PBUY$250

Tang Kevin · 10% OwnerJun 30

100 sh @ $2.50 · 0.0% own

PBUY$65.9K

Tang Kevin · 10% OwnerJun 30

25,930 sh @ $2.54 · +1.0% own

PBUY$1.9K

Tang Kevin · 10% OwnerJun 29

777 sh @ $2.48 · +<0.1% own

PBUY$158K

Tang Kevin · 10% OwnerJun 29

63,985 sh @ $2.47 · +2.6% own

PBUY$340

Tang Kevin · 10% OwnerJun 26

134 sh @ $2.54 · +<0.1% own

PBUY$191.4K

Tang Kevin · 10% OwnerJun 26

75,047 sh @ $2.55 · +3.1% own

PBUY$1.3K

Tang Kevin · 10% OwnerJun 25

510 sh @ $2.56 · +<0.1% own

PBUY$361.8K

Tang Kevin · 10% OwnerJun 25

145,880 sh @ $2.48 · +6.5% own

AGRANT◆—

Whiting Nancy · DirectorJun 15

32,000 sh

AGRANT◆—

Lim Jonathan E · DirectorJun 15

48,000 sh

AGRANT◆—

Christensen James · DirectorJun 15

32,000 sh

AGRANT◆—

Lew Jennifer · DirectorJun 15

32,000 sh

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

All 8 filings we hold were filed within the two-business-day deadline.

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.