Tito Serafini - Feb 9, 2023 Form 4 Insider Report for Atreca, Inc. (BCEL)

Role: Chief Strategy Officer, Director
Signature: /s/ Courtney J. Phillips, Attorney-In-Fact
Stock symbol: BCEL
Transactions as of: Feb 9, 2023
Transactions value $: $0
Form type: 4
Date filed: 2/13/2023, 07:57 PM
Previous filing: Sep 20, 2022
Next filing: Aug 4, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BCEL	Class A Common Stock	Award	$0	-43.8K	-35.84%	$0.00	78.3K	Feb 9, 2023	Direct	F1
holding	BCEL	Class A Common Stock						50K	Feb 9, 2023	By the Serafini/Postner Irrevocable Remainder Trust
holding	BCEL	Class A Common Stock						229K	Feb 9, 2023	By the Serafini/Postner Revocable Trust

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	BCEL	Employee stock option (right to buy)	Award	$0	+175K		$0.00	175K	Feb 9, 2023	Class A Common Stock	175K	$1.49	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 received an award of 43,750 restricted stock units on February 9, 2023, vesting in three equal annual installments beginning on August 1, 2023. Each restricted stock unit represents a right to receive one share of Atreca Class A Common Stock upon vesting.
F2	1/48 of the Option vests in equal monthly installments as measured from January 1, 2023. If applicable, vesting accelerates as provided in, and subject to the terms and conditions of, that certain Executive Employment Agreement between the Issuer and the Reporting Person, as may be amended from time to time.