AllianceBernstein L.P. (ATRC) reports 5.5% beneficial ownership in AtriCure

Rhea-AI Filing Summary

AllianceBernstein L.P. filed an amended Schedule 13G reporting beneficial ownership of AtriCure Inc common stock. As of June 30, 2026, AllianceBernstein reported beneficial ownership of 2,768,365 shares, representing 5.5% of AtriCure’s outstanding common stock. The shares are held solely for investment purposes in client discretionary investment advisory accounts.

AllianceBernstein reported sole voting power over 2,631,027 shares and sole dispositive power over 2,737,665 shares, with an additional 30,700 shares subject to shared dispositive power and no shared voting power. AllianceBernstein is a Delaware partnership and a majority-owned subsidiary of Equitable Holdings, Inc., but states it operates under independent management and makes independent decisions from its parent.

Key Figures

Beneficially owned shares: 2,768,365 shares Percent of class: 5.5% Sole voting power: 2,631,027 shares +4 more

7 metrics

Beneficially owned shares 2,768,365 shares AtriCure common stock beneficially owned by AllianceBernstein L.P. as of June 30, 2026

Percent of class 5.5% Portion of AtriCure common stock class held by AllianceBernstein L.P.

Sole voting power 2,631,027 shares Shares of AtriCure over which AllianceBernstein L.P. has sole power to vote

Shared voting power 0 shares Shares of AtriCure over which AllianceBernstein L.P. has shared power to vote

Sole dispositive power 2,737,665 shares Shares of AtriCure over which AllianceBernstein L.P. has sole power to dispose

Shared dispositive power 30,700 shares Shares of AtriCure over which AllianceBernstein L.P. has shared power to dispose

As-of date 06/30/2026 Date of ownership information for AllianceBernstein L.P.’s AtriCure position

Key Terms

beneficially owned, Sole Voting Power, dispositive power, discretionary investment advisory accounts, +1 more

5 terms

beneficially owned financial

"Amount beneficially owned: 2,768,365 shares acquired solely for investment purposes"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole Voting Power financial

"Sole Voting Power 2,631,027.00 6 | Shared Voting Power 0.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

dispositive power financial

"Sole Dispositive Power 2,737,665.00 8 | Shared Dispositive Power 30,700.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

discretionary investment advisory accounts financial

"shares acquired solely for investment purposes on behalf of client discretionary investment advisory accounts"

Schedule 13G regulatory

"EQH calculates and reports beneficial ownership separately from AllianceBernstein pursuant to guidance provided"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

FAQ

What percentage of AtriCure (ATRC) shares does AllianceBernstein L.P. report owning?

AllianceBernstein L.P. reports beneficial ownership of 5.5% of AtriCure Inc’s common stock. This corresponds to 2,768,365 shares held across client discretionary investment advisory accounts as of June 30, 2026.

How many AtriCure (ATRC) shares does AllianceBernstein L.P. beneficially own?

AllianceBernstein L.P. beneficially owns 2,768,365 shares of AtriCure common stock. These shares are held solely for investment purposes on behalf of client discretionary investment advisory accounts, according to the Schedule 13G/A filing.

What voting power does AllianceBernstein L.P. have over its AtriCure (ATRC) holdings?

AllianceBernstein L.P. has sole voting power over 2,631,027 shares of AtriCure and no shared voting power. This defines how many shares it can vote or direct the vote for on behalf of its clients.

What dispositive power does AllianceBernstein L.P. report for its AtriCure (ATRC) position?

AllianceBernstein L.P. reports sole dispositive power over 2,737,665 shares of AtriCure and shared dispositive power over 30,700 shares. Dispositive power refers to the authority to dispose of or direct the disposition of the shares.

Are AllianceBernstein L.P.’s AtriCure (ATRC) shares held for investment or control purposes?

AllianceBernstein L.P. states the 2,768,365 AtriCure shares are acquired solely for investment purposes. The position is held on behalf of client discretionary investment advisory accounts, not for exercising control over AtriCure.

What is the relationship between AllianceBernstein L.P. and Equitable Holdings, Inc. in this AtriCure (ATRC) filing?

AllianceBernstein L.P. is a majority owned subsidiary of Equitable Holdings, Inc. It states it operates under independent management and makes independent decisions from Equitable Holdings and its subsidiaries for beneficial ownership reporting.

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Available on EDGAR 08/14/2026 - 03:32 PM Accepted by SEC EDGAR 08/14/2026 - 03:30 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

AtriCure Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

04963C209

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 04963C209

1

Names of Reporting Persons

AllianceBernstein L.P.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 2,631,027.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,737,665.00
8	Shared Dispositive Power 30,700.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,768,365.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.5 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: AtriCure Inc
(b)	Address of issuer's principal executive offices: 7555 INNOVATION WAY,, MASON,, OH, 45040
Item 2.
(a)	Name of person filing: AllianceBernstein L.P. ("AllianceBernstein L.P.")
(b)	Address or principal business office or, if none, residence: 501 Commerce Street, Nashville, TN 37203 All media outlets, please contact Jennifer Will at AllianceBernstein (212-969-1157) with any questions. All other questions can be directed to Section13USFilings@alliancebernstein.com.
(c)	Citizenship: Delaware
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 04963C209
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 2,768,365 shares acquired solely for investment purposes on behalf of client discretionary investment advisory accounts.* *AllianceBernstein L.P. is a majority owned subsidiary of Equitable Holdings, Inc. ("EQH"). AllianceBernstein operates under independent management and makes independent decisions from EQH and its respective subsidiaries, and EQH calculates and reports beneficial ownership separately from AllianceBernstein pursuant to guidance provided by the Securities and Exchange Commission in Release Number 34-39538 (January 12, 1998).
(b)	Percent of class: 5.5 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 2,631,027
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 2,737,665
	(iv) Shared power to dispose or to direct the disposition of: 30,700
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

AllianceBernstein L.P.

Signature:	Marcus Edwards
Name/Title:	AVP/ Senior Compliance Associate
Date:	08/14/2026