# Aptose Biosciences Inc. (APTO) insider trading, Q3 2026

Canonical: https://sec-api.dev/insider-trading/apto

> 9 non-derivative transactions: 0 purchases, 0 sales. CIK 882361.

| Date | Insider | Relationship | Code | Shares | Price | Owned after | Filing |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2026-06-30 | Seizinger Bernd R. | Other | D | 17000.0 | 1.72 | 0.0 | https://www.sec.gov/Archives/edgar/data/882361/000091228226000902/0000912282-26-000902-index.htm |
| 2026-06-30 | Bejar Rafael | Other | D | 244.0 | 1.72 | 0.0 | https://www.sec.gov/Archives/edgar/data/882361/000091228226000893/0000912282-26-000893-index.htm |
| 2026-06-30 | BURGER DENIS R | Other | D | 70.0 | 1.72 | 0.0 | https://www.sec.gov/Archives/edgar/data/882361/000091228226000894/0000912282-26-000894-index.htm |
| 2026-06-30 | Payne Fletcher | Other | D | 222.0 | 1.72 | 0.0 | https://www.sec.gov/Archives/edgar/data/882361/000091228226000895/0000912282-26-000895-index.htm |
| 2026-06-30 | Payne Fletcher | Other | D | 22.0 | 1.72 | 0.0 | https://www.sec.gov/Archives/edgar/data/882361/000091228226000895/0000912282-26-000895-index.htm |
| 2026-06-30 | PLATZER ERICH | Other | D | 1122.0 | 1.72 | 0.0 | https://www.sec.gov/Archives/edgar/data/882361/000091228226000896/0000912282-26-000896-index.htm |
| 2026-06-30 | Rice William G. | Director, Officer | D | 613252.0 | 1.72 | 0.0 | https://www.sec.gov/Archives/edgar/data/882361/000091228226000897/0000912282-26-000897-index.htm |
| 2026-06-30 | Whitehead Warren | Other | D | 33.0 | 1.72 | 0.0 | https://www.sec.gov/Archives/edgar/data/882361/000091228226000900/0000912282-26-000900-index.htm |
| 2026-06-13 | Vincent Mark D. | Other | D | 14.0 | 1.72 | 0.0 | https://www.sec.gov/Archives/edgar/data/882361/000091228226000898/0000912282-26-000898-index.htm |

Source: https://www.sec.gov/data-research/sec-markets-data/insider-transactions-data-sets

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