SCHEDULE: ZeroStack Corp. Schedule 13D Filing Update

Michael Heinrich and Zero Gravity Labs Inc. report beneficial ownership of 30.2% and 26.4% of ZeroStack Corp. common shares respectively, totaling over 56% combined.

Summary

• Michael Heinrich and Zero Gravity Labs Inc. (0G) have filed an amended Schedule 13D regarding their beneficial ownership of ZeroStack Corp. common shares.
• Michael Heinrich directly holds 5,579,783 shares, representing 30.2% of the class, with sole voting and dispositive power.
• Zero Gravity Labs Inc. holds 4,608,575 shares, representing 26.4% of the class, with shared voting and dispositive power.
• The total beneficial ownership reported by both entities is 10,188,358 shares, which is 56.6% of the outstanding shares.
• The filing date for this amendment is July 20, 2026, with the percentage of class calculation based on 17,489,828 outstanding shares as of that date.
• Michael Heinrich is also a director and Chairman of the Board of ZeroStack Corp. as of September 20, 2025.
• The filing confirms a Joint Filing Agreement between Michael Heinrich and Zero Gravity Labs Inc. dated April 2, 2026.
• A Form of Stock Option Agreement dated May 5, 2026, is also referenced.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this filing as neutral, primarily reporting on ownership stakes and governance roles without new financial or operational information.

Positives

• Significant combined beneficial ownership of ZeroStack Corp. common shares by Michael Heinrich and Zero Gravity Labs Inc. (over 56%).
• Michael Heinrich holds direct sole voting and dispositive power over his 30.2% stake.
• Michael Heinrich's role as a director and Chairman of the Board indicates significant influence.
• The filing confirms a joint filing agreement, suggesting coordinated action and transparency.

Negatives

• The filing does not detail any negative financial performance or operational issues for ZeroStack Corp.

Risks

• Potential for concentrated ownership to influence corporate decisions and strategy.
• The nature of the relationship between Michael Heinrich and Zero Gravity Labs Inc. could present governance complexities if not managed transparently.

Future Outlook

The filing primarily concerns beneficial ownership and does not contain specific forward-looking financial guidance or operational outlook for ZeroStack Corp.

Management Comments

• Michael Heinrich's role as Chief Executive Officer of 0G is noted.
• Michael Heinrich's position as director and Chairman of the Board of ZeroStack Corp. is stated.

Industry Context

StockSavvy.ai notes that Schedule 13D filings are crucial for understanding significant shifts in beneficial ownership, which can signal potential changes in corporate control or strategy within the technology sector.

Corporate Governance

Legal Proceedings

• Neither Michael Heinrich nor Zero Gravity Labs Inc. have been convicted in a criminal proceeding or been a party to a civil proceeding that resulted in judgments related to securities laws violations in the last five years.

Related Party Transactions

• The relationship between Michael Heinrich and Zero Gravity Labs Inc. (0G), where 0G is owned and controlled by Michael Heinrich, represents a related party dynamic.

Stakeholder Impact

• Shareholders: The significant combined ownership by Heinrich and 0G may influence corporate strategy and decision-making, potentially impacting shareholder value.
• Management: Michael Heinrich's dual role as CEO of 0G and Chairman of ZeroStack Corp. highlights a key leadership figure with substantial influence.
• Creditors: Changes in corporate control or strategy could indirectly affect the company's financial stability and ability to meet obligations.

Next Steps

• Monitoring of future filings to observe any changes in beneficial ownership or strategic actions by Michael Heinrich and Zero Gravity Labs Inc.

Key Dates

Keywords

Schedule 13D, ZeroStack Corp., Beneficial Ownership, Michael Heinrich, Zero Gravity Labs Inc., Common Shares, SEC Filing, Corporate Governance