BOLD

Boundless Bio, Inc.

Nasdaq· Pharmaceutical Preparations· Inc. DE· CIK 0001782303 Biotech & Drug Discovery

$2.36 −0.08 (−3.28%)

Oct 23 4:00 PM ET · prev $2.44

Market cap

$56.4M

Micro cap

Median target

$4.00

+69% · range $4.00–4.00

Next earnings

Nov 3

in 8 days · EPS est. −$0.56

1 year

+61.6%

from $1.46 · Oct 24

30 days

−9.2%

from $2.60

52-week range

$1.05–3.00

−21% from high · low Feb 4

Avg volume 20D

176.2K

Oct 16 spike 711.2K

Short interest

778.5K

≈3.4% of shares · −4.1%

Days to cover

4.3

at average volume

Insider net

+$1.7M

1 buyer · 3 sellers · 12 mo

New fund stakes

Q2 2026 13F · 0 exits

Filing reports

analyzed by SecBot

SecBot read BEARISH 3 reports · 90 days

Balance 1 bearish · 0 bullish · 2 neutral oldest → newest, height = score

Avg score

·High conf. 2/3 ·Next Earnings date, Nov 3, 2026

Strongest BEARISH Boundless Bio (BOLD) filed an S-4 registration statement for a reverse merger with privately-held Serapha…

All reports →

Price

Daily candles with volume. Pins mark insider trades, rating changes, 13F stakes, reports, catalysts and short-interest jumps.

E Apr 17 FDA: Boundless Bio Presents Preclinical Breast Cancer Data from…
B Jun 25 to Jul 21 18 days of insider buys: $1.5M by 1 insider, avg $2.48
S Jul 1 2 insiders sell $79.7K at $2.49
X Jul 15 Short interest jumps 27.2% to 240.4K
X Aug 14 Short interest jumps 208.0% to 689.4K
S Aug 26 1 insider sell $54.4K at $2.97
R Oct 8 Boundless Bio (BOLD) filed an S-4 registration statement for a rever…
B Oct 16 to Oct 20 3 days of insider buys: $349.6K by 1 insider, avg $2.34

Signal stack

Where each data set points today.

InsidersBULLISH

1 insider bought $1.9M at an average $2.45. 3 insiders sold $134.0K.
InstitutionsMIXED

Q2 2026: 2 added (0 new), 1 trimmed or exited.
EstimatesRISING

Current-quarter EPS estimate −$0.640 → −$0.560 over 90 days. 0 up, 1 down in 30 days.
Short sellersSTEADY

Short interest −4.1% to 778.5K shares. 4.3 days to cover, ≈3.4% of shares.
TrendDOWNTREND

13% below its 50-day average.

Who's buying

13F· Q2 2026

new positions

exits

Fund	Move	Shares	Value
MILLENNIUM MANAGEMENT LLC	DOUBLED	478,639	$1.2M
CITADEL ADVISORS LLC	NEAR_EXIT	145,049	$362.6K
BlackRock, Inc.	ADD	88,495	$221.2K
GEODE CAPITAL MANAGEMENT, LLC	ADD	127,576	$140.3K
MILLENNIUM MANAGEMENT LLC	TRIM	99,875	$109.9K
CITIGROUP INC	TRIM	8,837	$9.7K
UBS Group AG	NEAR_EXIT	2	$2.00
CWM, LLC	TRIM	9	—

Quarterly 13F filings are due 45 days after each quarter ends.

The Street

last action Aug 2025

12-month targets · 1 analysts

$2.36 $4.00 $4.00 $4.00

Price is below the lowest target. Median implies +69%.Targets as of Oct 26, 2026.

Recent actions

Date	Firm	Action	Rating
Aug 11, 2025	HC Wainwright & Co. MAINTAIN	MAINTAIN	Buy
Jun 2, 2025	HC Wainwright & Co. INITIATE	INITIATE	Buy
May 28, 2025	Leerink Partners DOWNGRADE	DOWNGRADE	Market Perform
Dec 13, 2024	Guggenheim DOWNGRADE	DOWNGRADE	Neutral
Apr 22, 2024	Leerink Partners INITIATE	INITIATE	Outperform
Apr 22, 2024	Guggenheim INITIATE	INITIATE	Buy

Insider ledger

Form 4

$1.9M

bought · 1 insider

$134.0K

sold · 3 insiders

−3.7%

vs their $2.45 cost

Date	Insider	Type	Value
Oct 20, 2026	TANG KEVIN 10%+ Owner	BUY	$521.40
Oct 19, 2026	TANG KEVIN 10%+ Owner	BUY	$29.9K
Oct 19, 2026	TANG KEVIN 10%+ Owner	BUY	$42.6K
Oct 16, 2026	TANG KEVIN 10%+ Owner	BUY	$276.6K
Aug 26, 2026	TANG KEVIN 10%+ Owner	SELL	$54.4K
Jul 21, 2026	TANG KEVIN 10%+ Owner	BUY	$7.3K
Jul 20, 2026	TANG KEVIN 10%+ Owner	BUY	$4.0K
Jul 17, 2026	TANG KEVIN 10%+ Owner	BUY	$646.60

Earnings setup

Estimates

Nov 3

reports in 8 days

−$0.56

EPS estimate, this quarter

+12%

estimate change, 90 days

0↑ 1↓

revisions, 30 days

Current-quarter EPS estimate

−$0.640

90d

−$0.633

60d

−$0.610

30d

−$0.610

−$0.560

Now

Period	EPS est.	Range	30D rev.	Revenue
Current Q	-$0.56	-$0.56–-$0.56	+8.2%	$0.00
Next Q	-$0.32	-$0.32–-$0.32	+46.7%	$0.00
Current FY	-$2.53	-$2.53–-$2.53	-5.4%	$0.00
Next FY	-$0.98	-$0.98–-$0.98	-5.4%	$0.00