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Cabaletta Bio, Inc.

For the period ended Dec 31, 2024. Filed Mar 31, 2025.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2024 · Filed Mar 31, 2025

CABA$1.50+15.4%Stored close · as of Nov 9, 2026

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Item 9B. Other Information

Rule 10b5-1 Trading Plans

During the fiscal quarter ended on December 31, 2024, none of our directors and officers (as defined in Rule 16a-1(f) under the Exchange Act)adopted, modified orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as those terms are defined in Item 408(a) of Regulation S-K, except as described in the table below:

Name and TitleActionAction DateDuration of Trading Arrangements(1)Rule 10b5-1 Trading Arrangement?(Y/N)*Aggregate Number of Securities Subject to Trading Arrangement
Steven Nichtberger Chief Executive OfficerTerminate(2)October 18, 2024July 8, 2024 - July31, 2025YUp to 350,000 shares to be sold
Steven Nichtberger Chief Executive OfficerAdopt(2)October 18, 2024February 16, 2025 – July 27, 2026YUp to 350,000 shares to be sold
Gwendolyn Binder President of Science and TechnologyTerminateNovember 21, 2024February 20, 2024 – February 21, 2025YUp to 100,756 shares to be sold
Gwendolyn Binder President of Science and TechnologyAdoptDecember 18, 2024March 27, 2025 to December 12, 2025YUp to 100,756 shares to be sold
  • Denotes whether the trading plan is intended, when adopted, to satisfy the affirmative defense of Rule 10b5-1(c).

(1) Except as indicated by footnote, each trading arrangement permitted or permits transactions through and including the earlier to occur of (a) the completion of all purchases or sales or (b) the date listed in the table.

(2) Represents the modification, as described in Rule 10b5-1(c)(1)(iv) under the Exchange Act, of a written trading arrangement adopted on November 9, 2023 that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.

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