Cabaletta Bio, Inc. — Director's Dealing 2019

Oct 25, 2019

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Cabaletta Bio, Inc. (CABA)
CIK: 0001759138
Period of Report: 2019-10-24

Reporting Person: Simon Mark (Director)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Series A-1 Preferred Stock	$		Common Stock (18144)		Direct
Stock Option (Right to Buy)	$1.01	2028-10-28	Common Stock (27968)		Direct
Stock Option (Right to Buy)	$6.30	2029-02-18	Common Stock (18460)		Direct

Footnotes

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

F2: This option vests in eight equal quarterly installments beginning on October 11, 2018.

F3: This option vests in eight equal quarterly installments beginning on February 19, 2019.