Tito Serafini - Dec 23, 2021 Form 4 Insider Report for Atreca, Inc. (BCEL)

Role: Chief Strategy Officer, Director
Signature: /s/ Courtney Phillips, Attorney-In-Fact
Stock symbol: BCEL
Transactions as of: Dec 23, 2021
Transactions value $: $0
Form type: 4
Date filed: 12/28/2021, 05:49 PM
Previous filing: Sep 28, 2021
Next filing: Mar 8, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	BCEL	Class A Common Stock						50K	Dec 23, 2021	By the Serafini/Postner Irrevocable Remainder Trust
holding	BCEL	Class A Common Stock						274K	Dec 23, 2021	By the Serafini/Postner Revocable Trust
holding	BCEL	Class A Common Stock						42.2K	Dec 23, 2021	Direct

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	+95K		$0.00	95K	Dec 23, 2021	Class A Common Stock	95K	$3.18	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	1/48 of the Option vests in equal monthly installments as measured from 12/1/2021. 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. Early Exercise is not permitted.