Aptose Biosciences Inc. (APTO) insider trading.
In Q3 2026, insiders at Aptose Biosciences Inc. reported 9 non-derivative transactions on 8 Forms 3, 4 and 5: 0 open-market purchases and 0 sales.
- Transactions
- 9
- Purchases (P)
- 0
- Sales (S)
- 0
- Net shares, P minus S
- 0
- Insiders
- 8
- Last filed
- 2026-07-02
Insiders
| Insider | Relationship | Transactions | Buys | Sales |
|---|---|---|---|---|
| Payne Fletcher | Other | 2 | 0 | 0 |
| Seizinger Bernd R. | Other | 1 | 0 | 0 |
| Bejar Rafael | Other | 1 | 0 | 0 |
| Burger Denis R | Other | 1 | 0 | 0 |
| Platzer Erich | Other | 1 | 0 | 0 |
| Rice William G. | Director, Officer · Chair, President & CEO | 1 | 0 | 0 |
| Whitehead Warren | Other | 1 | 0 | 0 |
| Vincent Mark D. | Other | 1 | 0 | 0 |
Transactions
| Date | Insider | Code | Shares | Price | Owned after | Filing |
|---|---|---|---|---|---|---|
| 2026-06-30 | Seizinger Bernd R. | D (D) | 17,000 | $1.72 | 0 | Form 4 |
| 2026-06-30 | Bejar Rafael | D (D) | 244 | $1.72 | 0 | Form 4 |
| 2026-06-30 | Burger Denis R | D (D) | 70 | $1.72 | 0 | Form 4 |
| 2026-06-30 | Payne Fletcher | D (D) | 222 | $1.72 | 0 | Form 4 |
| 2026-06-30 | Payne Fletcher | D (D) | 22 | $1.72 | 0 | Form 4 |
| 2026-06-30 | Platzer Erich | D (D) | 1,122 | $1.72 | 0 | Form 4 |
| 2026-06-30 | Rice William G. | D (D) | 613,252 | $1.72 | 0 | Form 4 |
| 2026-06-30 | Whitehead Warren | D (D) | 33 | $1.72 | 0 | Form 4 |
| 2026-06-13 | Vincent Mark D. | D (D) | 14 | $1.72 | 0 | Form 4 |
Transaction codes in this quarter
Get APTO insider transactions through the API
curl "https://sec-api.dev/api/v1/insider-transactions?period=2026q3&cik=882361&limit=100" \
-H "Authorization: Bearer $SEC_API_KEY"Insider trading API guide · Aptose Biosciences Inc. on SEC.gov
Questions
Are insiders buying or selling Aptose Biosciences Inc. (APTO)?
In Q3 2026, insiders at Aptose Biosciences Inc. reported 9 non-derivative transactions on 8 Forms 3, 4 and 5: 0 open-market purchases and 0 sales. Grants, tax withholding and option exercises are counted as transactions but are not purchases or sales.
Where do these Aptose Biosciences Inc. insider trades come from?
From the SEC Insider Transactions Data Sets for Q3 2026, which republish the Forms 3, 4 and 5 filed on EDGAR. Each row links to its filing on SEC.gov.
Plain-text version for agents and LLMs: /insider-trading/apto.md
Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.