Steven Nichtberger - Jan 31, 2022 Form 4 Insider Report for Cabaletta Bio, Inc. (CABA)

Role
President & CEO, Director
Signature
By: /s/ Michael Gerard, Attorney-in-Fact
Stock symbol
CABA
Transactions as of
Jan 31, 2022
Transactions value $
$50,500
Form type
4
Date filed
2/2/2022, 03:26 PM
Previous filing
Jan 19, 2022
Next filing
Oct 18, 2022

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CABA Common Stock Options Exercise $50.5K +50K +6.36% $1.01* 836K Jan 31, 2022 Direct
holding CABA Common Stock 363K Jan 31, 2022 By 2017 Nichtberger Family Trust F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CABA Stock Option (Right to Buy) Options Exercise $0 -50K -17.88% $0.00 230K Jan 31, 2022 Common Stock 50K $1.01 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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 a stock option to purchase 279,677 shares of common stock. The shares vest and become exercisable over four years, with 25% vested on October 11, 2019, and the remaining shares vesting in 36 equal monthly installments thereafter. On January 31, 2022 the reporting person exercised this option for 50,000 shares.