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CIK 0001782303 · Non-accelerated filer<br>Smaller reporting company<br>Emerging growth company

Boundless Bio, Inc.

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Ticker
BOLD
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
830751369
Phone
(858) 766-9912
Business address
11099 NORTH TORREY PINES ROAD, SUITE 150, LA JOLLA, CA, 92037
Open-market buys, last 90 days
$458,375
in 5 filings
Open-market sales, last 90 days
$54,351
in 1 filing

Net +$404,024. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. TANG KEVIN +$404K 10% owner sold <1% of stake
Date Insider Transaction Shares Price Value Owned after
2025-01-22 Hornby Zachary President & CEO Grant or award · Stock Option +295,000 295,000
2025-01-22 Oien Jessica See Remarks Grant or award · Stock Option +90,000 90,000
2024-08-19 Hassig Christian Chief Scientific Officer Returned to the company · Stock Option −10,256 0
2024-08-19 Hassig Christian Chief Scientific Officer Returned to the company · Stock Option −62,820 0
2024-08-19 Hassig Christian Chief Scientific Officer Returned to the company · Stock Option −94,871 0
2024-08-19 Hassig Christian Chief Scientific Officer Returned to the company · Stock Option −76,173 0
2024-08-19 Hassig Christian Chief Scientific Officer Returned to the company · Stock Option −48,703 0
2024-08-19 Hassig Christian Chief Scientific Officer Grant or award · Stock Option +10,256 10,256
2024-08-19 Hassig Christian Chief Scientific Officer Grant or award · Stock Option +62,820 62,820
2024-08-19 Hassig Christian Chief Scientific Officer Grant or award · Stock Option +94,871 94,871
2024-08-19 Hassig Christian Chief Scientific Officer Grant or award · Stock Option +76,173 76,173
2024-08-19 Hassig Christian Chief Scientific Officer Grant or award · Stock Option +48,703 48,703
2024-08-19 Oien Jessica See Remarks Returned to the company · Stock Option −32,051 0
2024-08-19 Oien Jessica See Remarks Returned to the company · Stock Option −29,148 0
2024-08-19 Oien Jessica See Remarks Returned to the company · Stock Option −10,200 0
2024-08-19 Oien Jessica See Remarks Returned to the company · Stock Option −42,051 0
2024-08-19 Oien Jessica See Remarks Returned to the company · Stock Option −35,897 0
2024-08-19 Oien Jessica See Remarks Returned to the company · Stock Option −26,090 0
2024-08-19 Oien Jessica See Remarks Returned to the company · Stock Option −16,234 0
2024-08-19 Oien Jessica See Remarks Grant or award · Stock Option +32,051 32,051

Page 4 of 10 · 185 trades