Cabaletta Bio, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Convertible Preferred Stock

Convertible Preferred Stock

9 Months Ended

Sep. 30, 2019

Temporary Equity Disclosure [Abstract]

7. Convertible Preferred Stock

The Company has issued Series A Preferred, Series A-1 Preferred, Series A-2 Preferred, and Series B convertible preferred stock (Series B Preferred) (collectively, the Convertible Preferred Stock). The Company classifies Convertible Preferred Stock outside of stockholders’ deficit because the shares contain deemed liquidation rights that are a contingent redemption feature not solely within the control of the Company. There was no Convertible Preferred Stock issued during the nine months ended September 30, 2018 or outstanding as of September 30, 2018. The following table summarizes the Company’s Convertible Preferred Stock issued in the nine months ended September 30, 2019 and outstanding as of September 30, 2019:

	Series A Preferred				Series A-1 Preferred				Series A-2 Preferred						Series B Preferred					Total Convertible Preferred Stock
	Shares		Amount		Shares		Amount		Shares			Amount			Shares		Amount			Shares		Amount
Balance—December 31, 2018		3,146,551	$	12,575		7,372,719	$	24,994		1,873,777		$	6,352			—	$	—			12,393,047	$	43,921
Issuance		—		—		—		—		—			—			6,963,788		50,000			6,963,788		50,000
Exchange, including deemed dividend		—		—		—		—		(1,405,332	)		(4,764	)		1,405,332		10,090			—		5,326
Issuance costs		—		—		—		—		—			—			—		(1,293	)		—		(1,293	)
Balance—September 30, 2019		3,146,551	$	12,575		7,372,719	$	24,994		468,445		$	1,588			8,369,120	$	58,797			19,356,835	$	97,954

Non-Voting Common Stock Election

In October 2019, certain holders of the Company’s Convertible Preferred Stock elected to have such shares convert into 6,409,519 shares of non-voting Common Stock following the closing of the Company’s proposed initial public offering. The non-voting shares of Common Stock shall have the same rights and preferences as the Common Stock but shall be non-voting.