SCHEDULE: Steven Nichtberger's 3.3% Stake in Cabaletta Bio

Steven Nichtberger reports beneficial ownership of 3.3% of Cabaletta Bio, Inc. common stock as of June 30, 2025.

Summary

• Steven Nichtberger beneficially owns 3,034,499 shares of Cabaletta Bio, Inc. common stock.
• This ownership represents approximately 3.3% of the company's outstanding common stock as of June 30, 2025.
• The total beneficial ownership includes 986,483 shares held directly by Dr. Nichtberger (1.1% of outstanding common stock).
• An additional 363,000 shares are held directly by the 2017 Nichtberger Family Trust (0.4% of outstanding common stock), for which Dr. Nichtberger is a trustee.
• The ownership also includes 1,685,016 shares underlying options held directly by Dr. Nichtberger that are exercisable within 60 days of June 30, 2025 (1.8% of outstanding common stock).
• The percentage of class was calculated based on 91,451,899 shares of common stock outstanding as of June 30, 2025, plus the 1,685,016 exercisable options.

Sentiment

Score: 5

Explanation: The filing is a routine beneficial ownership report (Schedule 13G Amendment No. 3) and does not contain information that would inherently indicate positive or negative sentiment beyond the fact of an insider holding a significant stake.

Future Outlook

NA

Industry Context

This filing is a standard disclosure of beneficial ownership by an individual, likely an insider, in a publicly traded biotechnology company. It provides transparency regarding significant individual holdings but does not offer insights into broader industry trends or competitive landscape.

Stakeholder Impact

• Shareholders: Provides transparency regarding a significant individual holding, potentially indicating alignment of interests with management/insiders.

Key Dates

Keywords

Cabaletta Bio, Steven Nichtberger, Beneficial Ownership, Common Stock, SEC Filing, Schedule 13G, Biotechnology, Pharmaceuticals