Warrants keep Esousa, Wachs’ VivoSim Labs (VIVS) stake under 10%
Esousa Group Holdings LLC and Michael Wachs together own 9.9% of VivoSim Labs (VIVS) common stock, or 319,429 shares, as of June 30, 2026. They hold warrants for 576,542 additional shares but cannot exercise them to exceed the 9.9% ownership limit. They have sole voting and dispositive power over the 319,429 shares.
How this was made
The 30-second read
Why it matters
The main new information is the reported beneficial ownership level (9.9%) and that warrants are excluded from beneficial ownership due to a 9.9% beneficial ownership limitation.
Market read
This is a regulatory ownership update that may slightly affect perceived control dynamics but does not indicate a transaction, financing, or operational change.
What to watch
Traders may be over-weighting the stake size; the key constraint is the beneficial ownership limitation that prevents warrant exercises from pushing ownership above 9.9%.
Background
The article summarizes an amended Schedule 13G/A for VivoSim Labs, detailing beneficial ownership and warrant terms.
Ticker impact
VivoSim Labs filed an amended Schedule 13G showing Esousa Group Holdings LLC and Michael Wachs beneficially own 9.9% of shares, with warrants capped below that level.
Limited near-term impact; any reaction is likely modest unless investors interpret the stake as signaling control or future financing.
This is a beneficial ownership disclosure (13G/A) with a stated 9.9% cap on warrant-driven ownership, which is typically incremental rather than a fundamental catalyst.
Market effects
Minimal, as the disclosure is company-specific and does not change sector fundamentals.
None indicated.
None indicated.
Counterpoint
The 9.9% cap may reduce the market’s control concerns, so the disclosure could be less bullish than a headline “near-10% stake” might imply.
Key entities
- issuerVivoSim Labs, Inc.
Company whose amended Schedule 13G/A discloses Esousa and Michael Wachs’ beneficial ownership and warrant limitation.
- investorEsousa Group Holdings LLC
Reporting person with beneficial ownership of 319,429 shares (9.9%) and warrants subject to a 9.9% cap.
- investorMichael Wachs
Co-reporting person with beneficial ownership of 319,429 shares (9.9%) and warrants subject to a 9.9% cap.


