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Boundless Bio, Inc.

BOLD Net buying
CIK 0001782303 #4584 in the set updated 17 Sep 2026
Bought (12 mo)
$1.52M
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$134.03K
$0.00 on a plan · $79.68K straight out of an exercise
Sold at will
$54.35K
1 of 3 sales
Net
+$1.38M
+$1.46M against sales at will

By person

3 insiders · 25 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
TANG KEVIN
10% owner
$1.52M (22)
$54.35K (1)
+$1.46M
5,699,570
25.06%
$16.93M
+11.6%
ARCH Venture Fund IX, L.P. entity
10% owner
—
$39.84K (1) scheduled
−$39.84K
0
0.0000%
$0.00
—
CRANDELL KEITH
10% owner
—
$39.84K (1) scheduled
−$39.84K
0
0.0000%
$0.00
—

Individual transactions

25
Insider
Date
Role
Action
Shares
Price
Amount
TANG KEVIN
26 Aug 2026
10% owner
Sell indirect
18,300
$2.97
$54.35K
TANG KEVIN
21 Jul 2026
10% owner
Buy indirect
2,975
$2.44
$7.26K
TANG KEVIN
20 Jul 2026
10% owner
Buy indirect
1,623
$2.44
$3.96K
TANG KEVIN
17 Jul 2026
10% owner
Buy indirect
265
$2.44
$646.60
TANG KEVIN
16 Jul 2026
10% owner
Buy indirect
18,491
$2.44
$45.12K
TANG KEVIN
15 Jul 2026
10% owner
Buy indirect
1,600
$2.44
$3.90K
TANG KEVIN
14 Jul 2026
10% owner
Buy indirect
43,878
$2.43
$106.62K
TANG KEVIN
13 Jul 2026
10% owner
Buy indirect
48,211
$2.42
$116.67K
TANG KEVIN
10 Jul 2026
10% owner
Buy indirect
43,367
$2.43
$105.38K
TANG KEVIN
9 Jul 2026
10% owner
Buy indirect
7
$2.48
$17.36
TANG KEVIN
8 Jul 2026
10% owner
Buy indirect
14,338
$2.46
$35.27K
TANG KEVIN
7 Jul 2026
10% owner
Buy indirect
15,810
$2.48
$39.21K
TANG KEVIN
6 Jul 2026
10% owner
Buy indirect
27,062
$2.49
$67.38K
TANG KEVIN
2 Jul 2026
10% owner
Buy indirect
9,821
$2.49
$24.45K
TANG KEVIN
1 Jul 2026
10% owner
Buy indirect
71,612
$2.49
$178.31K
ARCH Venture Fund IX, L.P.
1 Jul 2026
10% owner
Sold after exercise indirect
16,000
$2.49
$39.84K
CRANDELL KEITH
1 Jul 2026
10% owner
Sold after exercise indirect
16,000
$2.49
$39.84K
TANG KEVIN
30 Jun 2026
10% owner
Buy indirect
100
$2.50
$250.00
TANG KEVIN
30 Jun 2026
10% owner
Buy indirect
25,930
$2.54
$65.86K
TANG KEVIN
29 Jun 2026
10% owner
Buy indirect
777
$2.48
$1.93K
TANG KEVIN
29 Jun 2026
10% owner
Buy indirect
63,985
$2.47
$158.04K
TANG KEVIN
26 Jun 2026
10% owner
Buy indirect
134
$2.54
$340.36
TANG KEVIN
26 Jun 2026
10% owner
Buy indirect
75,047
$2.55
$191.37K
TANG KEVIN
25 Jun 2026
10% owner
Buy indirect
510
$2.56
$1.31K
TANG KEVIN
25 Jun 2026
10% owner
Buy indirect
145,880
$2.48
$361.78K

What was left out

Form 4 filings counted 18
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 9
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 2
Sales at will 1
Transactions with no price 0
Shares from compensation/vesting 32,000
History held since 29 Mar 2024