Quick Takeaways
- Bleichroeder LP filed SCHEDULE 13G/A for Aptose Biosciences Inc. Common Shares (APTO).
- Disclosed ownership: 6.3%.
- Date of event: 31 Mar 2025.
Bleichroeder LP - 31 Mar 2025 SCHEDULE 13G/A Report for Aptose Biosciences Inc. Common Shares (APTO)
- Filing Manager
- Bleichroeder LP
- Reporting Manager
- Bleichroeder LP
- Symbol
- APTO
- Shares outstanding
- 2,587,810 shares
- Disclosed Ownership
- 163,032 shares
- Ownership
- 6.3%
- Form type
- SCHEDULE 13G/A
- Filing time
- 13 May 2025, 12:28:45 UTC
- Date of event
- 31 Mar 2025
- Previous filing
- 24 Mar 2025
- Next filing
- 14 Aug 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"Bleichroeder LP disclosed 6.3% ownership in Aptose Biosciences Inc. Common Shares (APTO) on 31 Mar 2025."
What Changed
- Previous schedule filing date: 24 Mar 2025.
- Current filing was accepted on 13 May 2025, 12:28.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (3)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Bleichroeder LP | 6.3% | 163,032 | 163,032 | 0 | Andrew Gundlach | Andrew Gundlach, President and CEO | |
| Bleichroeder Holdings LLC | 6.3% | 163,032 | 163,032 | 0 | Andrew Gundlach | Andrew Gundlach, President and CEO | |
| Andrew Gundlach | 6.3% | 163,032 | 163,032 | 0 | Andrew Gundlach | Andrew Gundlach, Individual |