Cabaletta Bio, Inc. — Director's Dealing 2020

Feb 13, 2020

SEC Form 5 — Annual Statement of Changes in Beneficial Ownership

Issuer: Cabaletta Bio, Inc. (CABA)
CIK: 0001759138
Period of Report: 2019-12-31

Reporting Person: Nichtberger Steven (Director, President & CEO)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-12-11	Stock Option (Right to Buy)	$1.01	A	93225	Acquired	2028-10-28	Common Stock (93225)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	786483	Direct
Common Stock	363000	Indirect

Footnotes

F1: The reporting person disclaims beneficial ownership of these securities, and the filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

F2: On October 29, 2018, the reporting person was granted an performance stock option to purchase 279,677 shares of common stock, of which 93,225 of the shares shall vest upon affirmative approval by our board of directors of a clinical candidate for treatment of MG with in vivo proof-of-concept to support a decision to move forward with IND-enabling development of such clinical candidate. This performance criteria was met on December 10,2019, resulting in vesting of the option as to 93,225 shares.