Companies: 10,795·Total market cap: $144.5T
Aptose Biosciences Inc.

Aptose Biosciences Inc.

APTONASDAQHealthcare
$1.71
+$1.71(+100.00%)
Market Cap$4364655
P/E Ratio—
52W High$43.191
52W Low$1.1
SEC Filings
Foreign Private Issuer · Files 20-F / 6-K

Aptose Biosciences Inc. (APTO) SEC Filings & 10-K Annual Reports

SEC EDGAR regulatory submissions (10-K, 10-Q, 8-K), latest forms, and full filing history — quick links to financials and earnings below.

SEC EDGAR · data.sec.gov · CIK 0000882361 · APTO · NASDAQ · as of Jun 9, 2026

Filing snapshot

1,001+
Total Filings
8-K
Latest Form
2026-05-29
Most Recent
1992
Filing Since
FinancialsEarningsView All on EDGAR

Source: SEC EDGAR (data.sec.gov) · CIK 0000882361 · Updated hourly · Not investment advice

Latest Annual Report

10-K · Annual ReportFY
Filed Date
2026-03-31
Fiscal Year End
Mar 31, 2026
Accession No.
0001193125-26-135012
Primary Document
none-20251231.htm
View on SEC EDGARDownload PDFFiling Index
Source: data.sec.gov · CIK 0000882361 · Accession 0001193125-26-135012

Latest Key Filings

6-KQuarterly Report
FORM 6-K
2019-01-02
View 6-K on SEC
8-KCurrent Report
FORM 8-K
2026-05-29Material Event
View 8-K on SEC
Form 4Insider Activity
Ownership Change Disclosures

Executive & director trade disclosures. Full buy/sell sentiment analysis on the dedicated tab.

View Insider Trades Tab

SEC Filing History

Hide Form 4 / 144
8-KCurrent Report
FORM 8-K
2026-05-29
View
10-QQuarterly Report
10-Q
2026-05-13
View
8-KCurrent Report
FORM 8-K
2026-05-13
View
8-KCurrent Report
FORM 8-K
2026-04-30
View
SC 13E3/ASC 13E3/A
SC 13E3/A
2026-04-01
View
10-KAnnual Report
10-K
2026-03-31
View
8-KCurrent Report
FORM 8-K
2026-03-31
View
8-KCurrent Report
8-K
2026-03-31
View
RWRW
RW
2026-03-23
View
8-KCurrent Report
8-K
2026-03-23
View
8-KCurrent Report
FORM 8-K
2026-03-23
View
8-KCurrent Report
FORM 8-K
2026-03-19
View
8-KCurrent Report
8-K
2026-02-24
View
SC 13E3/ASC 13E3/A
SC 13E3/A
2026-02-24
View
DEFM14ADEFM14A
DEFM14A
2026-02-24
View
Showing 1–15 of 885 filingsForm 4 / 144 hidden· 1001 total in EDGAR

About SEC Filings & 10-K Annual Reports

Data source: SEC EDGAR (data.sec.gov)  |  Updated: Hourly  |  CIK: 0000882361  |  Exchange: NASDAQ · Healthcare

Aptose Biosciences Inc. (NASDAQ: APTO) has submitted 1,001+ documents to the U.S. Securities and Exchange Commission (SEC) since its IPO in 1992. As a Healthcare sector company with CIK 0000882361, all filings are publicly accessible via the EDGAR database at no cost.

The annual 10-K report is Aptose Biosciences Inc.'s most comprehensive regulatory disclosure. The most recent Aptose Biosciences Inc. 10-K was filed on 2026-03-31 for fiscal year ending 2026. Historical APTO 10-K annual reports are available from 2005 through 2026.

Investors researching Aptose Biosciences Inc. SEC filings can access 10-K annual reports, quarterly 10-Q reports, material event 8-K filings, and proxy statements directly from the links above. All documents are sourced from the official SEC EDGAR system.

Source: SEC EDGAR · data.sec.gov · SEC Form 10-K · SEC Form 10-Q · SEC Form 8-K2026-06-09
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→ APTO Financials→ APTO Earnings→ APTO Insider Trades

Frequently Asked Questions

APTO SEC Filings · 8 questions

Aptose Biosciences Inc. (APTO) SEC filings are publicly available on this page and on the official SEC EDGAR database at sec.gov. You can browse all 1,001+ filings and access original documents at no cost. Aptose Biosciences Inc.'s CIK is 0000882361.

APTO SEC filingsAptose Biosciences Inc. SEC documentsfind APTO 10-K