Cabaletta Bio, Inc. — Director's Dealing 2019

Oct 30, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Cabaletta Bio, Inc. (CABA)
CIK: 0001759138
Period of Report: 2019-10-29

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-10-29	Common Stock	C	60483	—	Acquired	786483	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-10-29	Series A-1 Preferred Stock	$	C	90725	Disposed		Common Stock (60483)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	363000	Indirect

Footnotes

F1: Upon the closing of the Issuer's initial public offering, all shares of Series A-1 Preferred Stock automatically converted into shares of Common Stock of the Issuer on a one-for-1.5 basis. The Series A-1 Preferred Stock had no expiration date.

F2: 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.