SCHEDULE 13G: Citadel Entities Disclose Significant Passive Stake in Cabaletta Bio, Exceeding 5% Ownership Threshold
Beneficial Ownership Report
Citadel Advisors LLC, Citadel Securities LLC, and affiliated entities, along with Kenneth Griffin, have disclosed a combined beneficial ownership of 5.2% in Cabaletta Bio, Inc., primarily for investment purposes.
Summary
- Citadel Advisors LLC, Citadel Advisors Holdings LP, and Citadel GP LLC collectively beneficially own 4,687,280 shares of Cabaletta Bio, Inc., representing 5.0% of the outstanding common stock.
- Citadel Securities LLC, Citadel Securities Group LP, and Citadel Securities GP LLC collectively beneficially own 131,280 shares, representing 0.1% of the outstanding common stock.
- Kenneth Griffin, through his control over the various Citadel entities, is deemed to beneficially own an aggregate of 4,818,560 shares, which constitutes 5.2% of Cabaletta Bio's common stock.
- The beneficial ownership is primarily held with shared voting and shared dispositive power among the reporting persons.
- The percentages are based on 92,943,101 shares outstanding, which includes 89,943,101 shares outstanding immediately following the issuer's public offering and 3,000,000 shares issuable upon conversion of certain warrants held by affiliates of the reporting persons.
- The shares were acquired and are held for investment purposes and not with the intent to change or influence the control of Cabaletta Bio, Inc.
Sentiment
Score: 5
Explanation: The document is a factual, routine regulatory filing disclosing beneficial ownership, with no inherent positive or negative sentiment regarding the issuer's performance or outlook.
Industry Context
This filing is a routine disclosure by a significant institutional investor, Citadel, indicating a passive ownership stake in Cabaletta Bio, Inc. It reflects a standard investment position rather than a strategic industry move or competitive action.
Stakeholder Impact
- Shareholders: Provides transparency regarding a significant institutional holder's passive stake, which may offer some stability or liquidity perception.
Key Dates
| Date | Description |
|---|---|
| 2023-10-13 | Date of filing of Power of Attorney for Seth Levy to sign on behalf of Kenneth Griffin (filed with Allakos Inc. Schedule 13G). |
| 2025-06-12 | Date of event which required the filing of this statement, coinciding with the issuer's public offering prospectus supplement. |
| 2025-06-20 | Date as of which the reported share holdings are accurate (opening of the market). |
| 2025-06-20 | Date of filing of this Schedule 13G statement. |
Keywords
Cabaletta Bio, Citadel, Beneficial Ownership, Schedule 13G, Common Stock, Institutional Investment, Passive Stake
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