Updated Jul 16, 2026
STROME MARK E has filed 1 SEC Form 4 filing across 1 company in the last 90 days — active on both sides. Lifetime open-market purchases: $2.76M. Lifetime open-market sales: $895K. Historical track record: 1/5 stars across 3 tracked purchases.
Mark E. Strome is a corporate insider known for his role as a 10% owner in HeartBeam, Inc. and Zivo Bioscience, Inc. His involvement primarily relates to ownership stakes rather than executive positions.
| Role | 10% Owner |
|---|---|
| Notability | 20/100 |
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.
| InsiderAlpha rating | ★☆☆☆☆ (1/5) |
|---|---|
| Total purchases tracked | 3 |
| Purchases with forward-return data | 3 |
| 30-day win rate | 0% |
| 90-day win rate | 0% |
| Avg 5-day return | +76.43% |
| Avg 30-day return | -1273.65% |
| Avg 90-day return | -4762.09% |
| Best 30-day return | -886.08% |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-04-24 | ZIVO | Zivo Bioscience, Inc. | P — Open-market purchase | 100.0K | $2.00 | $200K |
| 2026-04-17 | BEAT | HeartBeam, Inc. | P — Open-market purchase | 750.0K | $0.80 | $600K |
| 2026-02-17 | ZIVO | Zivo Bioscience, Inc. | P — Open-market purchase | 20.0K | $9.77 | $195K |
| 2025-12-22 | BEAT | HeartBeam, Inc. | S — Open-market sale | 250.0K | $3.58 | $895K |
| 2025-10-20 | ZIVO | Zivo Bioscience, Inc. | P — Open-market purchase | 20.3K | $12.34 | $250K |
| 2024-12-31 | ZIVO | Zivo Bioscience, Inc. | P — Open-market purchase | 75.0K | $20.19 | $1.51M |
Mark E. Strome is a corporate insider known for his role as a 10% owner in HeartBeam, Inc. and Zivo Bioscience, Inc. His involvement primarily relates to ownership stakes rather than executive positions.…
1 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 8 open-market purchases ($2.76M) and 1 open-market sales ($895K) across all tracked filings.
Across 3 tracked purchases, STROME MARK E averaged -1273.7% avg 30-day return with a 0% 30-day win rate. InsiderAlpha rates the track record at 1/5 stars.
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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