ZeroStack (ZSTK) stock: insider trades, news & valuation
Net buyingShare price and insider trades
ZeroStack insider trading at a glance (Oct 9, 2026): in the past 12 months, 1 insider bought $3.5M and 1 sold $8K of ZSTK stock on the open market.
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ZSTK insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | $3.5M | 1 | $8K | 1 |
Valuation, profit and volume
Summary
Over the past 12 months, 1 ZeroStack Corp. insider reported open-market purchases totaling $3.5M, while 1 insider reported sales totaling $8K. 0 of 1 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Aug 21SEC | Rudy RongPresident | Sell | 1,000 | $7.57 | $8K | -39.0% | — |
| Jul 20SEC | Michael HeinrichChair | Buy | 4,608,575new position | $0.75 | $3.5M | +516.0% | — |
Insiders at ZeroStack Corp.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Michael HeinrichChair | $3.5M | — | Jul 20, 2026 | — |
| Rudy RongPresident | — | $8K | Aug 21, 2026 | — |
ZSTK stock: common questions
Are ZeroStack Corp. insiders buying ZSTK stock?
In the past 12 months, 1 insiders reported open-market purchases of ZSTK worth $3.5M. The latest was Chair Michael Heinrich bought $3.5M of ZSTK at $0.75 — first open-market purchase in our records; opens a new position.
Are ZeroStack Corp. insiders selling ZSTK stock?
1 insiders reported sales worth $8K over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is ZSTK's 52-week range?
Over the past year ZSTK has traded between $1.35 and $19.95. It last closed at $4.62 on Oct 9, 2026.