Summary
Updated Aug 31, 2026
Bernd R. Seizinger files SEC Form 4 reports at Aptose Biosciences Inc. (APTO). 6 SEC Form 4 filings on record going back to 2024, most recently on 2 July 2026. Most recent open-market trade: bought $34K of ONCY on 13 February 2026. Lifetime open-market purchases: $214K. Historical track record: 4/5 stars across 4 tracked purchases.
Recent Transactions
6Every recent SEC Form 4 transaction Bernd R. Seizinger has reported, most recent first.
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★★☆ (4/5) |
| Total purchases tracked | 4 |
| Purchases with forward-return data | 4 |
| 30-day win rate | 75% |
| 90-day win rate | 100% |
| Avg 5-day return | +20.52% |
| Avg 30-day return | +16.81% |
| Avg 90-day return | +13.93% |
| Best 30-day return | +35.38% |
Trading Pattern
InsiderAlpha's records for Bernd R. Seizinger go back to 2024: 6 primary Form 4 filings, an average of 2.0 per year. The typical open-market purchase is $54K (4 buys totaling $214K). The largest single buy on record is $104K of ONCY in 2026. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Bernd R. Seizinger files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Richard Peters - $100K of APRE open-market activity in the last 12 months
- Jared Kelly - $34K of ONCY open-market activity in the last 12 months
- Patricia S. Andrews - $30K of ONCY open-market activity in the last 12 months
- John P. Hamill - $30K of APRE open-market activity in the last 12 months
- Andrew Aromando - $25K of ONCY open-market activity in the last 12 months
- Wayne Pisano - $25K of ONCY open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Bernd R. Seizinger?
Bernd R. Seizinger is a corporate insider of Aptose Biosciences Inc. (APTO). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Bernd R. Seizinger submitted recently?
3 primary Form 4 filings in the last 90 days, covering 3 companies.
Has Bernd R. Seizinger been buying or selling stock?
Recorded transactions: 4 open-market purchases ($214K) and 0 open-market sales across all tracked filings.
How accurate is Bernd R. Seizinger's historical track record?
Across 4 tracked purchases, Bernd R. Seizinger averaged +16.8% avg 30-day return with a 75% 30-day win rate. InsiderAlpha rates the track record at 4/5 stars.
Where can I see all of Bernd R. Seizinger's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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