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AtriCure, Inc.

ATRC
Exchange
Nasdaq
Industry
Surgical & Medical Instruments & Apparatus
SEC CIK
0001323885

In the last 90 days, AtriCure, Inc. insiders filed 0 open-market purchases and 7 sales; 251 institutions reported holding it in 13F filings for Q2 2026, worth $1.47B in total; no superinvestor holds it.

Holders of 5% or more of ATRC

Holders whose latest Schedule 13D or 13G filing reports 5% or more of AtriCure, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of ATRC
HolderLatest formStakeChangeFirst filedLatest filingFiling
BlackRock, Inc.13G/A15.40%7.84M shares+7.60 ppfrom 7.80%Oct 17, 20252 filingsOct 5, 2026SEC
Vanguard Portfolio Management LLC13G/A7.22%3.68M shares+1.71 ppfrom 5.51%Apr 28, 20262 filingsOct 30, 2026SEC
Wellington Management Group LLP13G/A6.80%3.38M shares−1.20 ppfrom 8.00%Aug 12, 20252 filingsMay 15, 2026SEC
Hood River Capital Management LLC13G/A6.23%3.10M shares+0.23 ppfrom 6.00%Nov 14, 20243 filingsFeb 17, 2026SEC
Alliancebernstein L.P.13G/A5.50%2.77M shares–Feb 14, 20224 filingsAug 14, 2026SEC
Vanguard Capital Management LLC13G5.08%2.53M sharesNewApr 29, 20261 filingApr 29, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

37 Schedule 13D and 13G filings on AtriCure, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on ATRC
Filed (ET)FilerFormStakeChangeEvent dateFiling
Oct 30, 20261:38 PM ETVanguard Portfolio Management LLC13G/A7.22%3.68M shares+1.71 ppfrom 5.51%Sep 30, 2026SEC
Oct 5, 202611:58 AM ETBlackRock, Inc.13G/A15.40%7.84M shares+7.60 ppfrom 7.80%Sep 30, 2026SEC
Aug 14, 20263:30 PM ETAlliancebernstein L.P.13G/A5.50%2.77M shares–Jun 30, 2026SEC
May 15, 20267:48 AM ETWellington Management Group LLPand 3 others13G/A6.80%3.38M shares−1.20 ppfrom 8.00%Mar 31, 2026SEC
Apr 29, 20265:11 PM ETVanguard Capital Management LLC13G5.08%2.53M sharesNewMar 31, 2026SEC
Apr 28, 20264:14 PM ETVanguard Portfolio Management LLC13G5.51%2.74M sharesNewMar 31, 2026SEC
Mar 26, 20264:11 PM ETVanguard Group Inc13G/A0.00%0 shares–Below 5%Mar 13, 2026SEC
Feb 17, 20266:02 AM ETHood River Capital Management LLC13G/A6.23%3.10M shares+0.23 ppfrom 6.00%Dec 31, 2025SEC
Nov 13, 20251:55 PM ETMacquarie Group Ltdand 2 others13G/A4.60%2.29M shares−0.46 ppfrom 5.06%Below 5%Sep 30, 2025SEC
Oct 17, 20256:05 PM ETBlackRock, Inc.13G/A7.80%3.86M shares–Sep 30, 2025SEC
Aug 12, 202511:56 AM ETMacquarie Group Ltdand 2 others13G5.06%2.50M sharesNewJun 30, 2025SEC
Aug 12, 202510:34 AM ETWellington Management Group LLPand 3 others13G8.00%3.97M sharesNewJun 30, 2025SEC
May 14, 20254:02 PM ETChamplain Investment Partners, LLC13G4.40%2.14M shares−1.30 ppfrom 5.70%Below 5%Mar 31, 2025SEC
Feb 14, 20258:00 AM ETHood River Capital Management LLC13G/A6.00%2.92M shares–Dec 31, 2024SEC
Nov 14, 2024Hood River Capital Management LLC13GOld format–New–SEC
Nov 12, 202410:24 AM ETChamplain Investment Partners, LLC13G5.70%2.79M sharesNewSep 30, 2024SEC
Feb 14, 2024Alliancebernstein L.P.13G/AOld format–––SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Feb 1, 2024Invesco Ltd.13G/AOld format–––SEC
Jan 25, 20241:48 PM ETBlackRock Inc.13G/AOld format–––SEC
Dec 8, 2023Vanguard Group Inc13G/AOld format–––SEC
Feb 14, 2023Alliancebernstein L.P.13G/AOld format–––SEC
Feb 14, 2023Alger Associates Inc13G/AOld format–––SEC
Feb 9, 2023Vanguard Group Inc13G/AOld format–––SEC
Feb 3, 20234:27 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 3, 2023Invesco Ltd.13G/AOld format–––SEC
Feb 14, 2022Alliancebernstein L.P.13GOld format–New–SEC
Feb 14, 2022Alger Associates Inc13G/AOld format–––SEC
Feb 14, 2022Price T Rowe Associates Inc13G/AOld format–––SEC
Feb 9, 2022Vanguard Group Inc13G/AOld format–––SEC
Feb 9, 2022Invesco Ltd.13G/AOld format–––SEC
Feb 2, 20227:11 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 16, 2021Alger Associates Inc13GOld format–New–SEC
Feb 16, 2021Invesco Ltd.13GOld format–New–SEC
Feb 16, 2021Price T Rowe Associates Inc13GOld format–New–SEC
Feb 10, 2021Vanguard Group Inc13G/AOld format–––SEC
Jan 28, 20215:55 PM ETBlackRock Inc.13G/AOld format–––SEC

Form 144: proposed insider sales

38 notices from officers, directors and other affiliates planning to sell AtriCure, Inc. shares, newest first.

Form 144 notices for ATRC
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Nov 6, 20264:04 PM ETB Kristine Johnson Declaration TrustDirector2.45K$143.4KNov 6, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Nov 4, 20264:05 PM ETSalvatore PriviteraOfficer8.40K$546.3KNov 4, 202610b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Sep 23, 20264:03 PM ETSalvatore PriviteraOfficer4.52K$271.1KSep 23, 202610b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Sep 11, 202610:59 AM ETGroves Regina EDirector5.31K$285.1KSep 10, 2026Fidelity Brokerage Services LLCSEC
Sep 8, 20264:17 PM ETSalvatore PriviteraOfficer3.66K$201.1KSep 8, 202610b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Sep 2, 20265:15 PM ETSalvatore PriviteraOfficer7.76K$407.6KSep 2, 202610b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Aug 24, 20264:11 PM ETKarl DahlquistOfficer9.37K$458.1KAug 24, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Aug 5, 20264:16 PM ETMaggie YuenDirector3.50K$134.5KAug 5, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Aug 5, 20268:13 AM ETPrange KarenDirector3.56K$139.0KAug 5, 2026Fidelity Brokerage Services LLCSEC
Jul 29, 20262:23 PM ETNoznesky Justin JOfficer6.18K$239.9KJul 29, 2026RBC CAPITAL MARKETS LLCSEC
Jul 28, 20264:03 PM ETVinayak DoraiswamyOfficer6.00K$233.3KJul 28, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Jul 28, 20264:03 PM ETSven WehrweinDirector25.0K$964.4KJul 28, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
May 20, 20268:24 AM ETPrange KarenDirector3.00K$86.4KMay 20, 2026Fidelity Brokerage Services LLCSEC
May 15, 20265:05 PM ETVinayak DoraiswamyOfficer5.00K$140.7KMay 15, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Mar 12, 20264:38 PM ETVinayak DoraiswamyOfficer5.00K$149.2KMar 12, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Nov 26, 202511:48 AM ETNoznesky Justin JOfficer5.17K$192.6KNov 26, 2025RBC CAPITAL MARKETS LLCSEC
Nov 25, 20254:06 PM ETSven WehrweinDirector4.97K$188.7KNov 25, 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Nov 24, 20255:41 PM ETSven WehrweinDirector5.03K$187.9KNov 24, 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Nov 21, 20255:53 PM ETMaggie YuenDirector3.00K$107.2KNov 21, 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Sep 12, 20252:17 PM ETNoznesky Justin JOfficer3.00K$108.9KSep 12, 2025RBC CAPITAL MARKETS LLCSEC
Aug 22, 20254:01 PM ETSven WehrweinDirector5.00K$185.0KAug 22, 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Aug 19, 20254:12 PM ETSven WehrweinDirector5.00K$180.0KAug 19, 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Aug 6, 202510:38 AM ETGroves Regina EDirector2.45K$90.3KAug 6, 2025Fidelity Brokerage Services LLCSEC
Aug 5, 20254:08 PM ETVinayak DoraiswamyOfficer2.50K$91.4KAug 5, 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
May 28, 20254:02 PM ETVinayak DoraiswamyOfficer2.50K$83.6KMay 28, 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC

Showing the latest 25. See the ATRC notices from the last 12 months