# APTOSE BIOSCIENCES INC (APTOF)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/APTOF/

- Reporting holders: 4
- Reported value: $38.7K
- Shares held by institutions: 24,179 of 2,552,429 outstanding
- Held through calls: 0.0%
- Held through puts: 0.0%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [DRW Securities, LLC](https://holderbook.com/funds/1481986-drw-securities-llc/) | $32.0K | 19,761 | 0.0% | 5 |
| [Gleason Group, Inc.](https://holderbook.com/funds/1822632-gleason-group-inc/) | $6.3K | 4,206 | 0.0% | 6 |
| [CALDWELL SUTTER CAPITAL, INC.](https://holderbook.com/funds/702007-caldwell-sutter-capital-inc/) | $327 | 202 | 0.0% | 5 |
| [Farther Finance Advisors, LLC](https://holderbook.com/funds/1992825-farther-finance-advisors-llc/) | $15 | 10 | 0.0% | 3 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 4 | $38.7K |
| Q1 2026 | 4 | $40.0K |
| Q4 2025 | 4 | $35.8K |
| Q3 2025 | 3 | $28.1K |
| Q2 2025 | 4 | $20.7K |
| Q1 2025 | 15 | $486.8K |
| Q4 2022 | 2 | $6.7K |
| Q3 2022 | 2 | $23.0K |
| Q2 2022 | 2 | $36.0K |
| Q1 2022 | 2 | $65.0K |
| Q4 2021 | 2 | $38.0K |
| Q3 2021 | 2 | $197.0K |