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US INSIDER PROFILE · NON-SCORING RESEARCH

STROME MARK E

10% Owner | Director

Identity: SEC reporting-owner CIK · Reporting-owner CIK: 0000919484

Purchase history

Companies traded
2
Purchases · 12M
4
Purchases · 24M
6
Average purchase
$502.1K
Median purchase
$251.6K
Gross purchase value
$3.0M

Companies: HeartBeam, Inc. | Zivo Bioscience, Inc.

6 SEC accession(s) · 5 joint-owner event(s). Values are reported Form 4 transaction values in USD.

Qualifying purchase disclosures

PublishedCompanyTickerRoleReported valueSEC source
2026-04-24Zivo Bioscience, Inc.ZIVO10% Owner$200.0KOpen filing
2026-04-16HeartBeam, Inc.BEATDirector$600.0KOpen filing
2026-02-17Zivo Bioscience, Inc.ZIVO10% Owner$195.4KOpen filing
2025-10-20Zivo Bioscience, Inc.ZIVO10% Owner$250.0KOpen filing
2025-01-23Zivo Bioscience, Inc.ZIVO10% Owner$253.2KOpen filing
2024-12-31Zivo Bioscience, Inc.ZIVO10% Owner$1.5MOpen filing

Post-purchase outcomes

Excess return = stock return − S&P 500 ETF (SPY adjusted close) return. Returns start on the first shared trading session on or after publication.

PeriodCompleted eventsPrice coverageHit rateMedian excess returnAverage excess returnWorst excess return
5D1Small Sample16.7% (1/6)100.0% (1/1)+9.2%+9.2%+9.2%
20D1Small Sample16.7% (1/6)100.0% (1/1)+21.8%+21.8%+21.8%
60D1Small Sample16.7% (1/6)0.0% (0/1)-38.2%-38.2%-38.2%
120D1Small Sample16.7% (1/6)0.0% (0/1)-44.3%-44.3%-44.3%

Research patterns

First purchase in 12M
1/5
Large purchase ≥ $100k
6/6
Cluster buying · 15D
6/6
Buying the dip
1/1

Routine / opportunistic: Not classifiable. These labels never affect the score or ranking.

Small samples remain visible but are not scored. This research enrichment never affects US-v1.1.