WAVEMAN · COMPANY

BOLD · Boundless Bio, Inc.

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TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475

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BOLD

Name: Boundless Bio, Inc. (BOLD) insider trading and ownership data
Creator: WaveMan
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Boundless Bio, Inc.

PHARMA & BIOTECH · PHARMACEUTICAL PREPARATIONS · CIK 0001782303

SEC FILINGS☆ WATCH

INSIDER NET · 180D

$1.4M

open-market buys minus sells, Form 4 codes P and S

INSIDER BUYERS · 180D

CONGRESS BUYERS · 1Y

FUNDS ADDED · QTR

13F, latest reported quarter

REVENUE GROWTH

XBRL, annual

NET MARGIN

CONVERSIONS · 180D

codes C/M, not in net · $33.0K priced

SEVEN FACTS, RANKED AGAINST THE SECTOR · RANK IS NOT A FORECAST

INSIDERS

net +$1.4M over 180 days

+$1.4M over 90 days · +$1.4M of it by a 10%+ holder

more than 91% of Pharma & Biotech

CONGRESS

no member of Congress has reported trading it

FUNDS

23 funds added or opened last quarter

below 68% of Pharma & Biotech

REVENUE

no revenue reported in any filing

MARGIN

no margin: this company reports no revenue to divide by

BUYBACKS

no share repurchases reported

SHORT

1.0% of shares outstanding short · 1.5 days to cover · settled 2026-07-31

below 72% of Pharma & Biotech

The year, with the filings on it

Total return indexed to 100 over the last 12 months · every marker is a federal filing, placed at its date — hover any marker for the detail

TOTAL 12M RETURN +149.6%

+149.6%12M

INSIDER BUYINSIDER SELL

INDEXED RETURN, DIVIDEND-ADJUSTED — NOT A PRICE CHART · LARGE TRADES DRAWN FIRST WHEN A NAME FILES HEAVILY

Live price

Daily candles from TradingView, on their licence — no filings are marked on this one

WHY THIS NAME IS ON THE DESK

Insiders are net buyers of their own stock.

The record shows a net $1.4M bought by insiders over 180 days, 23 funds added last quarter. Every figure is a federal filing, dated the day it became public.

Backtest this pattern Open the screener

Same sector, ranked by filing activity

Sector from the SEC's own SIC classification

UTHR CPIX MRNA REGN LLY ALNY ELF CITR MDGL DNA VRTX NUVL

Insider transactions

Form 4 purchases and sales (codes P and S) — grants, option exercises and preferred conversions excluded

Over the last 180 days, Boundless Bio, Inc. insiders bought a net $1.4M of stock across 33 Form 4 purchases and sales, with 1 insider(s) buying. Source: SEC Form 4 filings, as of 2026-09-04.

INSIDER

FILED

VALUE

TANG KEVIN

—

SELL

2026-08-26

18,300.0

$54.4K

TANG KEVIN

—

BUY

2026-07-21

2,975.0

$7.3K

TANG KEVIN

—

BUY

2026-07-20

1,623.0

$4.0K

TANG KEVIN

—

BUY

2026-07-17

265.0

$647

TANG KEVIN

—

BUY

2026-07-16

18,491.0

$45.1K

33 TRANSACTIONS ON RECORD

Showing the most recent few. Create a free account to see 28 more transactions on record, the cross-source screener and CSV export. We store only your email address, and there is no password to create.

Institutional holders

13F · holdings as of the latest quarter funds have reported

ARCH Venture Management, LLC

2,694,095.0 sh

$6.7M

FMR LLC

2,581,055.0 sh

$6.5M

TANG CAPITAL MANAGEMENT LLC

2,559,875.0 sh

$6.4M

ADAR1 Capital Management, LLC

1,968,216.0 sh

$4.9M

Cormorant Asset Management, LP

1,000,000.0 sh

$2.5M

SCHEDULE 13D/G

No 5%+ ownership filings

Nobody has crossed 5% with a filing obligation. Absence is a fact here, not missing data.

FORM 144

No planned-sale notices

No insider has notified an intent to sell. This is the panel to watch after a run-up.

Fund concentration

N-PORT · funds ranked by how much of THEMSELVES they put in this stock — the conviction number 13F cannot show

Ultra-Small Company Market Fund

$55.5K POSITION · AS OF 2026-03-31

0.0%

iShares Micro-Cap ETF

$46.7K POSITION · AS OF 2026-03-31

0.0%

1290 VT Micro Cap Portfolio

$3.3K POSITION · AS OF 2026-03-31

0.0%

Fidelity Series Growth Company Fund

$271.0K POSITION · AS OF 2026-02-28

0.0%

Fidelity Growth Company Fund

$1.0M POSITION · AS OF 2026-02-28

0.0%

Fidelity Growth Company K6 Fund

$266.2K POSITION · AS OF 2026-02-28

0.0%

SEC N-PORT, MONTHLY WITH A ~60-DAY PUBLIC LAG · FUNDS ≥ $10M · % = SHARE OF THE FUND'S OWN BOOK

Clinical pipeline

ClinicalTrials.gov · 3 registered trials, 0 still enrolling or running — a status change here is dated weeks before the press release

Phase 1

0 ACTIVE

TRIALS MATCHED TO THIS TICKER BY SPONSOR NAME · STUDIES RUN UNDER A SUBSIDIARY'S OWN NAME ARE NOT INCLUDED

Fundamentals

Annual figures from XBRL filings · pick a past date to see them exactly as the market knew them then — restatements and all

	2025-12	2024-12	2023-12
OPERATING INCOME	$-63.6M	$-73.3M	$-54.8M
NET INCOME	$-58.2M	$-65.4M	$-49.4M
EPS (DILUTED)	-2.60	-3.85	-40.65
OPERATING CASH FLOW	$-46.7M	$-60.8M	$-46.9M
CASH	$17.9M	$26.6M	$23.7M

SEC XBRL · FISCAL-YEAR PERIODS · AS KNOWN ON 2026-09-04 · NOBODY ELSE SHOWS FUNDAMENTALS AS OF A PAST DATE