APTO

Aptose Biosciences Inc.

Insider trading activity for Aptose Biosciences Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 12 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Transaction history

The 72 most recent Form 4 transactions.

Open in screener →

Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Jun 30	Whitehead Warren	Former Director	DTOISS◆	53,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Whitehead Warren	Former Director	DTOISS◆	40,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Whitehead Warren	Former Director	DTOISS◆	152,500	—	—	—	Open the original filing on SEC.gov
Jun 30	Whitehead Warren	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Whitehead Warren	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Whitehead Warren	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Whitehead Warren	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Whitehead Warren	Former Director	DTOISS◆	100,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Whitehead Warren	Former Director	DTOISS◆	3,333	—	—	—	Open the original filing on SEC.gov
Jun 30	Whitehead Warren	Former Director	DTOISS	33	$1.72	$57	-100.0%	Open the original filing on SEC.gov
Jun 30	Vincent Mark D.	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Vincent Mark D.	Former Director	DTOISS◆	60,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Vincent Mark D.	Former Director	DTOISS◆	5,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Vincent Mark D.	Former Director	DTOISS◆	10,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Vincent Mark D.	Former Director	DTOISS◆	40,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Vincent Mark D.	Former Director	DTOISS◆	154,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Vincent Mark D.	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Vincent Mark D.	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Vincent Mark D.	Former Director	DTOISS◆	100,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Vincent Mark D.	Former Director	DTOISS◆	3,333	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	400,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	300,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	100,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	400,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	2M	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	343,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	700,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	600,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	400,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS◆	70,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Rice William G.	Chair, President & CEO	DTOISS	613,252	$1.72	$1.1M	-100.0%	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS◆	60,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS◆	5,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS◆	10,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS◆	40,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS◆	135,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS◆	100,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS◆	3,333	—	—	—	Open the original filing on SEC.gov
Jun 30	Platzer Erich	Former Director	DTOISS	1,122	$1.72	$1.9K	-100.0%	Open the original filing on SEC.gov
Jun 30	Payne Fletcher	Former SVP and CFO	DTOISS◆	1M	—	—	—	Open the original filing on SEC.gov
Jun 30	Payne Fletcher	Former SVP and CFO	DTOISS◆	200,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Payne Fletcher	Former SVP and CFO	DTOISS◆	55,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Payne Fletcher	Former SVP and CFO	DTOISS	22	$1.72	$38	-100.0%	Open the original filing on SEC.gov
Jun 30	Payne Fletcher	Former SVP and CFO	DTOISS	222	$1.72	$382	-100.0%	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS◆	10,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS◆	60,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS◆	5,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS◆	40,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS◆	160,334	—	—	—	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS◆	100,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS◆	3,333	—	—	—	Open the original filing on SEC.gov
Jun 30	Burger Denis R	Former Director	DTOISS	70	$1.72	$120	-100.0%	Open the original filing on SEC.gov
Jun 30	Bejar Rafael	Former SVP&Ch Medical…	DTOISS◆	400,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Bejar Rafael	Former SVP&Ch Medical…	DTOISS◆	200,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Bejar Rafael	Former SVP&Ch Medical…	DTOISS◆	343,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Bejar Rafael	Former SVP&Ch Medical…	DTOISS◆	400,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Bejar Rafael	Former SVP&Ch Medical…	DTOISS◆	200,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Bejar Rafael	Former SVP&Ch Medical…	DTOISS◆	35,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Bejar Rafael	Former SVP&Ch Medical…	DTOISS	244	$1.72	$420	-100.0%	Open the original filing on SEC.gov
Jun 30	Seizinger Bernd R.	Former Director	DTOISS◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Seizinger Bernd R.	Former Director	DTOISS◆	100,000	—	—	—	Open the original filing on SEC.gov
Jun 30	Seizinger Bernd R.	Former Director	DTOISS◆	3,333	—	—	—	Open the original filing on SEC.gov
Jun 30	Seizinger Bernd R.	Former Director	DTOISS	17,000	$1.72	$29.2K	-100.0%	Open the original filing on SEC.gov
Jun 13	Vincent Mark D.	Former Director	DTOISS	14	$1.72	$24	-100.0%	Open the original filing on SEC.gov

DTOISS◆—

Whitehead Warren · Former DirectorJun 30

53,000 sh

DTOISS◆—

Whitehead Warren · Former DirectorJun 30

40,000 sh

DTOISS◆—

Whitehead Warren · Former DirectorJun 30

152,500 sh

DTOISS◆—

Whitehead Warren · Former DirectorJun 30

50,000 sh

DTOISS◆—

Whitehead Warren · Former DirectorJun 30

50,000 sh

DTOISS◆—

Whitehead Warren · Former DirectorJun 30

50,000 sh

DTOISS◆—

Whitehead Warren · Former DirectorJun 30

50,000 sh

DTOISS◆—

Whitehead Warren · Former DirectorJun 30

100,000 sh

DTOISS◆—

Whitehead Warren · Former DirectorJun 30

3,333 sh

DTOISS$57

Whitehead Warren · Former DirectorJun 30

33 sh @ $1.72 · -100.0% own

DTOISS◆—

Vincent Mark D. · Former DirectorJun 30

50,000 sh

DTOISS◆—

Vincent Mark D. · Former DirectorJun 30

60,000 sh

DTOISS◆—

Vincent Mark D. · Former DirectorJun 30

5,000 sh

DTOISS◆—

Vincent Mark D. · Former DirectorJun 30

10,000 sh

DTOISS◆—

Vincent Mark D. · Former DirectorJun 30

40,000 sh

DTOISS◆—

Vincent Mark D. · Former DirectorJun 30

154,000 sh

DTOISS◆—

Vincent Mark D. · Former DirectorJun 30

50,000 sh

DTOISS◆—

Vincent Mark D. · Former DirectorJun 30

50,000 sh

DTOISS◆—

Vincent Mark D. · Former DirectorJun 30

100,000 sh

DTOISS◆—

Vincent Mark D. · Former DirectorJun 30

3,333 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

400,000 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

300,000 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

50,000 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

100,000 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

400,000 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

2M sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

343,000 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

700,000 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

600,000 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

400,000 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

50,000 sh

DTOISS◆—

Rice William G. · Chair, President…Jun 30

70,000 sh

DTOISS$1.1M

Rice William G. · Chair, President…Jun 30

613,252 sh @ $1.72 · -100.0% own

DTOISS◆—

Platzer Erich · Former DirectorJun 30

60,000 sh

DTOISS◆—

Platzer Erich · Former DirectorJun 30

5,000 sh

DTOISS◆—

Platzer Erich · Former DirectorJun 30

10,000 sh

DTOISS◆—

Platzer Erich · Former DirectorJun 30

40,000 sh

DTOISS◆—

Platzer Erich · Former DirectorJun 30

135,000 sh

DTOISS◆—

Platzer Erich · Former DirectorJun 30

50,000 sh

DTOISS◆—

Platzer Erich · Former DirectorJun 30

50,000 sh

DTOISS◆—

Platzer Erich · Former DirectorJun 30

50,000 sh

DTOISS◆—

Platzer Erich · Former DirectorJun 30

100,000 sh

DTOISS◆—

Platzer Erich · Former DirectorJun 30

3,333 sh

DTOISS$1.9K

Platzer Erich · Former DirectorJun 30

1,122 sh @ $1.72 · -100.0% own

DTOISS◆—

Payne Fletcher · Former SVP and CFOJun 30

1M sh

DTOISS◆—

Payne Fletcher · Former SVP and CFOJun 30

200,000 sh

DTOISS◆—

Payne Fletcher · Former SVP and CFOJun 30

55,000 sh

DTOISS$38

Payne Fletcher · Former SVP and CFOJun 30

22 sh @ $1.72 · -100.0% own

DTOISS$382

Payne Fletcher · Former SVP and CFOJun 30

222 sh @ $1.72 · -100.0% own

DTOISS◆—

Burger Denis R · Former DirectorJun 30

10,000 sh

DTOISS◆—

Burger Denis R · Former DirectorJun 30

60,000 sh

DTOISS◆—

Burger Denis R · Former DirectorJun 30

5,000 sh

DTOISS◆—

Burger Denis R · Former DirectorJun 30

40,000 sh

DTOISS◆—

Burger Denis R · Former DirectorJun 30

160,334 sh

DTOISS◆—

Burger Denis R · Former DirectorJun 30

50,000 sh

DTOISS◆—

Burger Denis R · Former DirectorJun 30

50,000 sh

DTOISS◆—

Burger Denis R · Former DirectorJun 30

50,000 sh

DTOISS◆—

Burger Denis R · Former DirectorJun 30

100,000 sh

DTOISS◆—

Burger Denis R · Former DirectorJun 30

3,333 sh

DTOISS$120

Burger Denis R · Former DirectorJun 30

70 sh @ $1.72 · -100.0% own

DTOISS◆—

Bejar Rafael · Former SVP&Ch…Jun 30

400,000 sh

DTOISS◆—

Bejar Rafael · Former SVP&Ch…Jun 30

200,000 sh

DTOISS◆—

Bejar Rafael · Former SVP&Ch…Jun 30

343,000 sh

DTOISS◆—

Bejar Rafael · Former SVP&Ch…Jun 30

400,000 sh

DTOISS◆—

Bejar Rafael · Former SVP&Ch…Jun 30

200,000 sh

DTOISS◆—

Bejar Rafael · Former SVP&Ch…Jun 30

35,000 sh

DTOISS$420

Bejar Rafael · Former SVP&Ch…Jun 30

244 sh @ $1.72 · -100.0% own

DTOISS◆—

Seizinger Bernd R. · Former DirectorJun 30

50,000 sh

DTOISS◆—

Seizinger Bernd R. · Former DirectorJun 30

100,000 sh

DTOISS◆—

Seizinger Bernd R. · Former DirectorJun 30

3,333 sh

DTOISS$29.2K

Seizinger Bernd R. · Former DirectorJun 30

17,000 sh @ $1.72 · -100.0% own

DTOISS$24

Vincent Mark D. · Former DirectorJun 13

14 sh @ $1.72 · -100.0% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

1 of 8 filings we hold was filed after the two-business-day deadline. The furthest past the deadline was 9 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Jun 13	Jun 30	Vincent Mark D.Former Director	9days	$24	Filing ↗

Vincent Mark D.Former Director

9days

Traded Jun 13 · filed Jun 30Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.