ZeroStack (ZSTK) Executive Chairman Michael Heinrich Buys 4.6M Shares

What Happened

• Michael Heinrich, Executive Chairman and Director of ZeroStack (ZSTK), purchased 4,608,575 shares and also received a 500,000-share derivative award. The purchase was reported at $0.75 per share (footnote clarifies payment in native blockchain tokens with an implied token value of $0.7549), giving a reported total purchase value of approximately $3,479,013. The 500,000-share item is recorded as a derivative award/option (reported at $0.00).

Key Details

• Transaction date: 2026-07-20.
• Purchase: 4,608,575 shares @ $0.75 (token value per F1 = $0.7549) — reported total ≈ $3,479,013.
• Award/derivative: 500,000 shares reported as granted @ $0.00 (derivative).
• Entity/holding note: Some securities are/ will be held by Zero Gravity Labs Inc., a Delaware company owned and controlled by the reporting person (see F2).
• Grant approval & vesting: The options were board-approved March 5, 2026 and became shareholder-approved on July 20, 2026. Vesting is in five equal (20%) installments and each installment’s vesting is contingent on the issuer’s VWAP reaching specified thresholds (see F3).
• Filing timeliness: The filing date matches the transaction date (2026-07-20); no late filing flag was indicated in the provided summary.

Context

• The purchase of 4.6M shares is a cash/token-funded acquisition (not an immediate sale) and is generally viewed by investors as a more informative signal than sales because it increases insider exposure.
• The 500,000-share item is a derivative/option grant with performance-linked vesting (VWAP hurdles) — these do not immediately increase free-floating shares until vested/exercised, and vesting depends on future price performance.
• All statements are factual summaries of the Form 4; no motive or future performance is implied.