Douglas J. Seith - 01 Mar 2026 Form 4 Insider Report for AtriCure, Inc. (ATRC)

Role: Chief Operating Officer
Signature: /s/ Douglas J. Seith
Issuer symbol: ATRC
Transactions as of: 01 Mar 2026
Net transactions value: -$717,354
Form type: 4
Filing time: 03 Mar 2026, 16:52:33 UTC
Previous filing: 02 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Seith Douglas J	Chief Operating Officer	7555 INNOVATION WAY, MASON	/s/ Douglas J. Seith	03 Mar 2026	0001565823

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ATRC	Common Stock	Award	$0	+42,386	+23%	$0.000000	226,756	01 Mar 2026	Direct	F1
transaction	ATRC	Common Stock	Award	$0	+25,532	+11%	$0.000000	252,288	01 Mar 2026	Direct	F2
transaction	ATRC	Common Stock	Tax liability	$717,354	-22,948	-9.1%	$31.26	229,340	01 Mar 2026	Direct	F3

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

Explanation of Responses:

Id	Content
F1	The Reporting Person acquired these shares pursuant to a Restricted Stock Award under the AtriCure, Inc. 2023 Stock Incentive Plan. One third of the shares will vest annually upon the respective one, two, and three year anniversaries of the date of grant.
F2	The Reporting Person acquired these shares pursuant to the vesting and release of a Performance Share Award under the AtriCure, Inc. 2023 Stock Incentive Plan. The award had Company performance goals and a service period requirement which were met.
F3	The Reporting Person has elected to transfer these shares to the Company to satisfy the tax withholding obligation incurred upon the vesting and release of shares previously acquired pursuant to a Restricted Stock Award or Performance Share Award.