NASDAQ · BOLDHealthcarePharmaceuticals

Boundless Bio, Inc. Common Stock (BOLD)

$2.40+0.84%
Close Nov 4, 2026 · split-adjusted
Nov 4, 2026$2.40▲ 84.62% in range
Nov 4, 2025Low $1.05 · High $3.00Nov 4, 2026
What changed · written from our data
As of Nov 4, 2026

Boundless Bio closed at $2.40 on Nov 4, up 0.84%, 20.0% below its 52-week closing high. Volume of 138.9K shares was 0.83× its 20-day average (close to normal).

Split-adjusted performance: -6.6% over one month, +51.9% over six months, +75.2% over one year.

Short interest was 788.5K shares at the Oct 15 settlement, up 1.3% from the prior report (7.0% of float, 4.6 days to cover).

Market cap$55.5M23.1M shares
Revenue · quarter$0.00—
Diluted EPS$-1.06—
P/E · TTM—
Net margin—
Dividend yieldNone
52-week range1.05 – 3.00−20.0% from high
Volume138.9K0.83× 20-day avg
Volatility · 60d31.5%Annualised
Short % of float7.0%4.6 days to cover
Net cash$72.6MCash $72.6M
Next earnings—Not scheduled
Split-adjusted performance
1W −4.0%1M −6.6%3M −15.5%6M +51.9%YTD +100.0%1Y +75.2%3Y —5Y —

Earnings reactions

History →

No reported quarters with price history yet.

Rank within Pharmaceuticals

Percentile among 420 companies (100 = best)

6-month momentum93
Revenue growth—
Net margin—
Value (low P/E)—
Size32

Industry medians: 6-month return −25.5%, revenue growth +6.2%, net margin −33.8%, P/E 16.1×.

Short interest

Details →
Shares short788.5K+1.3% vs prior
Days to cover4.6Settled Oct 15
% of float7.0%
Short vol. 10d43.0%of daily volume

Closest peers by size in Pharmaceuticals

CompanyPriceToday6MRev. growthNet marginP/EMkt cap
BOLDBoundless Bio$2.40+0.84%+51.9%———$55.5M
ONCYOncolytics Biotech$0.4248+8.92%−53.8%———$55.7MCompare
RFLRafael Holdings$1.07−0.93%−14.4%−30.3%−3760.7%—$55.8MCompare
TLPHTalphera$1.05+0.96%+20.7%———$54.5MCompare
HRTXHeron Therapeutics$0.2986+4.88%−77.2%+1.3%−14.6%—$56.7MCompare
RNTXRein Therapeutics$0.6587−1.32%−43.7%———$56.8MCompare
OSTXOS Therapies Incorporated$1.15−0.86%−33.5%———$53.8MCompare
XLOXilio Therapeutics$8.71+0.35%+10.3%+131.2%−34.1%—$57.3MCompare
CTORCitius Oncology$0.5470−0.55%−39.8%—−597.4%—$57.9MCompare

Quick answers

What does Boundless Bio do?
Boundless Bio Inc is a clinical-stage oncology company. It is focused on developing cancer therapeutics that address the unmet need in patients with oncogene-amplified tumors by targeting extrachromosomal DNA (ecDNA), a root cause of oncogene amplification observed in cancer patients.
What is BOLD's market cap?
$55.46M, based on the Nov 4 close of $2.40.
Does Boundless Bio pay a dividend?
No regular cash dividend has been paid in the last year.
How much of BOLD is sold short?
788.5K shares, 7.0% of float, as of Oct 15, 2026.
What sector is BOLD in?
Healthcare, in the Pharmaceuticals industry.

About Boundless Bio

Boundless Bio Inc is a clinical-stage oncology company. It is focused on developing cancer therapeutics that address the unmet need in patients with oncogene-amplified tumors by targeting extrachromosomal DNA (ecDNA), a root cause of oncogene amplification observed in cancer patients. Using its proprietary Spyglass platform, the company identifies targets essential for ecDNA functionality, then designs and develops small-molecule drugs called ecDNA-directed therapies (ecDTx) to inhibit those targets. Its main ecDTx candidate under development, BBI-940, is a novel, oral, selective degrader that has demonstrated potent anti-tumor activity across a range of cancer cell lines and mouse xenograft models, including single-agent tumor regressions.

HQ: La Jolla, CA28 employeesListed Mar 28, 2024boundlessbio.com

Sources: Massive / Polygon daily aggregates (split-adjusted) · SEC filings via Massive · FINRA settlements via Massive · Financial Modeling Prep. Figures are dated where shown; research is informational, not investment advice. Methodology