Summary
Updated Aug 31, 2026
Mark E. Strome is 10% Owner of Zivo Bioscience, Inc. (ZIVO). 8 SEC Form 4 filings on record going back to 2024, most recently on 24 April 2026. Most recent open-market trade: bought $200K of ZIVO on 24 April 2026. Lifetime open-market purchases: $2.76M. Lifetime open-market sales: $895K. Historical track record: 3/5 stars across 5 tracked purchases.
Recent Transactions
6Every recent SEC Form 4 transaction Mark E. Strome 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 | ★★★☆☆ (3/5) |
| Total purchases tracked | 5 |
| Purchases with forward-return data | 5 |
| 30-day win rate | 40% |
| 90-day win rate | 20% |
| Avg 5-day return | -7.07% |
| Avg 30-day return | +14.62% |
| Avg 90-day return | -6.67% |
| Best 30-day return | +92.87% |
Trading Pattern
InsiderAlpha's records for Mark E. Strome go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. The typical open-market purchase is $345K (8 buys totaling $2.76M). The largest single buy on record is $1.51M of ZIVO in 2024. Sales side: 1 recorded sale totaling $895K, so the filing history runs buy-heavy by dollar value. 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 Mark E. Strome 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.
- Laith L. Yaldoo - $330K of ZIVO open-market activity in the last 12 months
- Christopher D. Maggiore - $284K of ZIVO open-market activity in the last 12 months
- Urioste George de - $182K of BEAT open-market activity in the last 12 months
- Willem Elfrink - $150K of BEAT open-market activity in the last 12 months
- Alison A. Cornell - $100K of ZIVO open-market activity in the last 12 months
- John Bernard Payne - $100K of ZIVO 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 Mark E. Strome?
Mark E. Strome is a corporate insider, tracked as 10% Owner of Zivo Bioscience, Inc. (ZIVO). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Mark E. Strome last file a Form 4?
The most recent primary Form 4 on record is dated 24 April 2026, one of 8 filings going back to 2024.
Has Mark E. Strome been buying or selling stock?
Recorded transactions: 8 open-market purchases ($2.76M) and 1 open-market sale ($895K) across all tracked filings.
How accurate is Mark E. Strome's historical track record?
Across 5 tracked purchases, Mark E. Strome averaged +14.6% avg 30-day return with a 40% 30-day win rate. InsiderAlpha rates the track record at 3/5 stars.
Where can I see all of Mark E. Strome'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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