Comparable stake leader
BlackRock, Inc.
SEC ownership of AtriCure, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001323885.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
05 Aug 2026
- Public ticker
- ATRC on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
05 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001323885
- Issuer location
- Mason, OH
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of AtriCure, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
05 Aug 2026
13D/G
13F
3/4/5
Lead comparable stake: 7.8%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 7.8%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
7.8%
WELLINGTON MANAGEMENT GROUP LLP
6.8%
Hood River Capital Management LLC
6.2%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.5%
VANGUARD CAPITAL MANAGEMENT LLC
5.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
Company
|
7.8%
|
$136,165,391
3,862,837 shares
|
$0 | 30 Sep 2025 |
| WELLINGTON MANAGEMENT GROUP LLP |
13D/G
|
6.8%
|
$96,504,294
3,382,555 shares
|
-$16,738,950 | 31 Mar 2026 |
| Hood River Capital Management LLC |
13D/G
|
6.2%
|
$122,501,931
3,096,611 shares
|
+$6,839,133 | 31 Dec 2025 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
Vanguard Portfolio Management
|
5.5%
|
$78,305,863
2,744,685 shares
|
$0 | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
Vanguard Capital Management
|
5.1%
|
$72,265,491
2,532,965 shares
|
$0 | 31 Mar 2026 |
| MACQUARIE GROUP LTD |
13D/G
Macquarie Group Limited
|
4.6%
|
$80,700,257
2,289,369 shares
|
-$7,537,719 | 30 Sep 2025 |
| Champlain Investment Partners, LLC |
13D/G
13F
Company
|
4.4%
|
$71,407,964
2,137,963 shares
|
-$21,803,353 | 31 Mar 2025 |
| Michael H. Carrel |
3/4/5
President, CEO, & Director, Director
|
1.6%
|
$22,243,769
794,944 shares
|
— | 30 Jul 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$3,217,922.
Buys
$0
Insiders: 0
Sells
$3,217,922
Insiders: 5
Net
-$3,217,922
Shares: -88,412
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 88,412
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 47,246 | $0 | $1,777,845 | -$1,777,845 |
| 3-6 | 0 | 10,000 | $0 | $289,800 | -$289,800 |
| 6-9 | 0 | 18,166 | $0 | $676,378 | -$676,378 |
| 9-12 | 0 | 13,000 | $0 | $473,900 | -$473,900 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 21 reporting-owner rows connected to AtriCure, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
21
Largest Forms 3/4/5 holder
Michael H. Carrel
Net 12M change
-$3,217,923
Latest report
05 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Michael H. Carrel | President, CEO, & Director, Director | $22,243,769 | Mixed | 30 Jul 2026 | ||
| Douglas J. Seith | Chief Operating Officer | $6,558,105 | Mixed | 30 Jun 2026 | ||
| Angela L. Wirick | Chief Financial Officer | $6,404,955 | Mixed | 01 Mar 2026 | ||
| Salvatore Privitera | Chief Technical Officer | $4,527,254 | Mixed | 30 Jun 2026 | ||
| Mark R. Lanning | Director | $4,329,093 | Mixed | 05 May 2021 | ||
| Justin J. Noznesky | Chief Mktg & Strategy Officer | $3,888,497 | -$541,402 | -12% | Filing P/S | 29 Jul 2026 |
| Robert S. White | Director | $3,660,912 | Mixed | 18 May 2026 | ||
| Vinayak S. Doraiswamy | Chief Scientific Officer | $3,363,547 | -$523,080 | -13% | Filing P/S | 28 Jul 2026 |
| Mark A. Collar | Director | $3,221,228 | Mixed | 13 Mar 2023 | ||
| Karl S. Dahlquist | Chief Legal Officer | $2,758,537 | Mixed | 30 Jun 2026 | ||
| Deborah Lee Yount | Chief Human Resources Officer | $1,765,692 | Mixed | 01 Mar 2025 | ||
| B. Kristine Johnson | Director | $1,596,367 | Mixed | 18 May 2026 | ||
| Sven Wehrwein | Director | $1,533,201 | -$1,687,578 | -52% | Filing P/S | 28 Jul 2026 |
| Scott William Drake | Director | $1,307,602 | Mixed | 07 May 2021 | ||
| Regina E. Groves | Director | $1,137,177 | Mixed | 18 May 2026 | ||
| Karen N. Prange | Director | $884,989 | -$224,233 | -20% | Filing P/S | 05 Aug 2026 |
| Deborah H. Telman | Director | $808,197 | Mixed | 18 May 2026 | ||
| Shlomo Nachman | Director | $703,407 | Mixed | 18 May 2026 | ||
| Maggie Yuen | Director | $538,456 | -$241,630 | -31% | Filing P/S | 05 Aug 2026 |
| Tonya Austin | Chief Human Resources Officer | $534,621 | Mixed | 13 May 2022 |
Recent insider transactions for AtriCure, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Karen N. Prange | ATRC | Common Stock | Sale | -13.5% | $138,283 | $38.80 | -3,564 | 22,809 | 05 Aug 2026 | Direct |
| Maggie Yuen | ATRC | Common Stock | Sale | -20% | $134,470 | $38.42 | -3,500 | 14,015 | 05 Aug 2026 | Direct |
| Michael H. Carrel | ATRC | Common Stock | Gift | -0.6% | -4,700 | 774,434 | 30 Jul 2026 | Direct | ||
| Justin J. Noznesky | ATRC | Common Stock | Sale | -5.81% | $239,862 | $38.80 | -6,182 | 100,219 | 29 Jul 2026 | Direct |
| Vinayak S. Doraiswamy | ATRC | Common Stock | Sale | -6.49% | $233,280 | $38.88 | -6,000 | 86,511 | 28 Jul 2026 | Direct |
| Sven Wehrwein | ATRC | Common Stock | Sale | -38.2% | $946,000 | $37.84 | -25,000 | 40,518 | 28 Jul 2026 | Direct |
| Sven Wehrwein | ATRC | Common Stock | Options Exercise | 61.7% | 25,000 | 65,518 | 28 Jul 2026 | Direct | ||
| Sven Wehrwein | ATRC | Non-qualified Stock Option (right to buy) | Options Exercise | -100% | -25,000 | 0 | 28 Jul 2026 | Direct | ||
| Michael H. Carrel | ATRC | Common Stock | Award | 0.08% | 636 | 779,134 | 30 Jun 2026 | Direct | ||
| Vinayak S. Doraiswamy | ATRC | Common Stock | Award | 0.69% | 636 | 92,511 | 30 Jun 2026 | Direct | ||
| Karl S. Dahlquist | ATRC | Common Stock | Award | 0.66% | 636 | 96,689 | 30 Jun 2026 | Direct | ||
| Douglas J. Seith | ATRC | Common Stock | Award | 0.23% | 527 | 229,867 | 30 Jun 2026 | Direct | ||
| Salvatore Privitera | ATRC | Common Stock | Award | 0.4% | 636 | 158,684 | 30 Jun 2026 | Direct | ||
| Karen N. Prange | ATRC | Common Stock | Sale | -10.2% | $85,950 | $28.65 | -3,000 | 26,373 | 20 May 2026 | Direct |
| Karen N. Prange | ATRC | Common Stock | Award | 26.4% | 6,144 | 29,373 | 18 May 2026 | Direct | ||
| Deborah H. Telman | ATRC | Common Stock | Award | 27.7% | 6,144 | 28,328 | 18 May 2026 | Direct | ||
| Maggie Yuen | ATRC | Common Stock | Award | 54% | 6,144 | 17,515 | 18 May 2026 | Direct | ||
| Shlomo Nachman | ATRC | Common Stock | Award | 33.2% | 6,144 | 24,655 | 18 May 2026 | Direct | ||
| B. Kristine Johnson | ATRC | Common Stock | Award | 12.3% | 6,144 | 55,954 | 18 May 2026 | Direct | ||
| Regina E. Groves | ATRC | Common Stock | Award | 18.2% | 6,144 | 39,859 | 18 May 2026 | Direct | ||
| Sven Wehrwein | ATRC | Common Stock | Award | 17.9% | 6,144 | 40,518 | 18 May 2026 | Direct | ||
| Robert S. White | ATRC | Common Stock | Award | 5.03% | 6,144 | 128,318 | 18 May 2026 | Direct | ||
| Vinayak S. Doraiswamy | ATRC | Common Stock | Sale | -5.16% | $140,650 | $28.13 | -5,000 | 91,875 | 15 May 2026 | Direct |
| Vinayak S. Doraiswamy | ATRC | Common Stock | Sale | -4.91% | $149,150 | $29.83 | -5,000 | 96,875 | 12 Mar 2026 | Direct |
| Robert S. White | ATRC | Common Stock | Options Exercise | 8.91% | 10,000 | 122,174 | 10 Mar 2026 | Direct | ||
| Robert S. White | ATRC | Non-qualified Stock Option (right to buy) | Options Exercise | -100% | -10,000 | 0 | 10 Mar 2026 | Direct | ||
| Michael H. Carrel | ATRC | Common Stock | Gift | -0.76% | -6,000 | 778,498 | 06 Mar 2026 | Direct | ||
| Michael H. Carrel | ATRC | Common Stock | Tax liability | -8.49% | -72,777 | 784,498 | 01 Mar 2026 | Direct | ||
| Michael H. Carrel | ATRC | Common Stock | Award | 24.7% | 169,898 | 857,275 | 01 Mar 2026 | Direct | ||
| Justin J. Noznesky | ATRC | Common Stock | Tax liability | -12.8% | -15,586 | 106,401 | 01 Mar 2026 | Direct | ||
| Justin J. Noznesky | ATRC | Common Stock | Award | 54.8% | 43,189 | 121,987 | 01 Mar 2026 | Direct | ||
| Salvatore Privitera | ATRC | Common Stock | Tax liability | -7.67% | -13,127 | 158,048 | 01 Mar 2026 | Direct | ||
| Salvatore Privitera | ATRC | Common Stock | Award | 36.3% | 45,588 | 171,175 | 01 Mar 2026 | Direct | ||
| Vinayak S. Doraiswamy | ATRC | Common Stock | Tax liability | -13.3% | -15,585 | 101,875 | 01 Mar 2026 | Direct | ||
| Vinayak S. Doraiswamy | ATRC | Common Stock | Award | 63.4% | 45,588 | 117,460 | 01 Mar 2026 | Direct | ||
| Angela L. Wirick | ATRC | Common Stock | Tax liability | -10.1% | -22,965 | 204,893 | 01 Mar 2026 | Direct | ||
| Angela L. Wirick | ATRC | Common Stock | Award | 38.3% | 63,088 | 227,858 | 01 Mar 2026 | Direct | ||
| Douglas J. Seith | ATRC | Common Stock | Tax liability | -9.1% | -22,948 | 229,340 | 01 Mar 2026 | Direct | ||
| Douglas J. Seith | ATRC | Common Stock | Award | 36.8% | 67,918 | 252,288 | 01 Mar 2026 | Direct | ||
| Karl S. Dahlquist | ATRC | Common Stock | Tax liability | -14% | -15,687 | 96,053 | 01 Mar 2026 | Direct | ||
| Karl S. Dahlquist | ATRC | Common Stock | Award | 63% | 43,189 | 111,740 | 01 Mar 2026 | Direct | ||
| Douglas J. Seith | ATRC | Common Stock | Award | 0.14% | 257 | 184,370 | 31 Dec 2025 | Direct | ||
| Michael H. Carrel | ATRC | Common Stock | Gift | -0.58% | -4,000 | 687,377 | 10 Dec 2025 | Direct | ||
| Justin J. Noznesky | ATRC | Common Stock | Sale | -6.15% | $192,640 | $37.29 | -5,166 | 78,798 | 26 Nov 2025 | Direct |
| Sven Wehrwein | ATRC | Common Stock | Sale | -12.6% | $188,746 | $38.00 | -4,967 | 34,374 | 25 Nov 2025 | Direct |
| Sven Wehrwein | ATRC | Common Stock | Options Exercise | 14.4% | 4,967 | 39,341 | 25 Nov 2025 | Direct | ||
| Sven Wehrwein | ATRC | Non-qualified Stock Option (right to buy) | Options Exercise | -16.6% | -4,967 | 25,000 | 25 Nov 2025 | Direct | ||
| Sven Wehrwein | ATRC | Common Stock | Sale | -12.8% | $187,832 | $37.32 | -5,033 | 34,374 | 24 Nov 2025 | Direct |
| Sven Wehrwein | ATRC | Common Stock | Options Exercise | 14.6% | 5,033 | 39,407 | 24 Nov 2025 | Direct | ||
| Sven Wehrwein | ATRC | Non-qualified Stock Option (right to buy) | Options Exercise | -14.4% | -5,033 | 29,967 | 24 Nov 2025 | Direct |
* marks a reported price that did not pass the local price check.