Latest Period
Q1 2026
Security Snapshot
AtriCure, Inc. - Common Stock (ATRC) Institutional Ownership
CUSIP: 04963C209
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
220
Shares (Excl. Options)
50,013,349
Price
$28.53
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- Security type / class
- Equity / Common Stock
- Symbol
- ATRC on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 50,013,349
- Total 13F value
- $1,462,601,752
- Portfolio coverage rank
- 0%
- Share change
- +826,328
- Value change
- -$2,230,294
- Number of holders
- 220
- Shares outstanding
- 49,743,456
- SEC-reported price per share
- $26.69
- Insider filing price
- $26.69
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- ATRC - AtriCure, Inc. - Common Stock is tracked under CUSIP 04963C209.
- 220 institutions reported positions in Q1 2026.
- 7 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 234 to 220 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $1,928,695,662 to $1,462,601,752.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 220 institutions filings for Q1 2026.
Security key
04963C209
Latest holder period
Q1 2026
13F holders
220
13D/G owners
7
CIK / CUSIP context first
Open Q1 2026 holders
ATRC full holder history
AtriCure, Inc. SEC filings
AtriCure, Inc. company facts
AtriCure, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 04963C209:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
7
Security
ATRC
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 7.8% | $136,165,391 | 3,862,837 | BlackRock, Inc. | 30 Sep 2025 | |||
| WELLINGTON MANAGEMENT GROUP LLP | 6.8% | -15% | $96,504,294 | -$16,738,950 | 3,382,555 | -15% | Wellington Management Group LLP | 31 Mar 2026 |
| Hood River Capital Management LLC | 6.2% | +3.8% | $122,501,931 | +$6,839,133 | 3,096,611 | +5.9% | Hood River Capital Management LLC | 31 Dec 2025 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.5% | $78,305,863 | 2,744,685 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.1% | $72,265,491 | 2,532,965 | Vanguard Capital Management | 31 Mar 2026 | |||
| MACQUARIE GROUP LTD | 4.6% | -9.2% | $80,700,257 | -$7,537,719 | 2,289,369 | -8.5% | Macquarie Group Limited | 30 Sep 2025 |
| Champlain Investment Partners, LLC | 4.4% | -22% | $71,407,964 | -$21,803,353 | 2,137,963 | -23% | Champlain Investment Partners, LLC | 31 Mar 2025 |
As of 31 Mar 2026, 220 institutional investors reported holding 50,013,349 shares of AtriCure, Inc. - Common Stock (ATRC). This represents 101% of the company’s total 49,743,456 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
76%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.1% | 4,042,681 | -0.57% | 0% | $115,337,702 |
| WELLINGTON MANAGEMENT GROUP LLP | 6.8% | 3,382,555 | -14% | 0.02% | $96,504,294 |
| ALLIANCEBERNSTEIN L.P. | 6.6% | 3,258,872 | -8.6% | 0.04% | $128,920,976 |
| Hood River Capital Management LLC | 6.3% | 3,117,545 | +0.68% | 0.89% | $88,943,559 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.4% | 2,702,632 | 0% | 0% | $77,106,091 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.3% | 2,155,764 | 0% | 0% | $61,503,947 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 3.6% | 1,804,927 | -11% | 0.09% | $51,495,000 |
| GOLDMAN SACHS GROUP INC | 3.4% | 1,667,166 | +88% | 0.01% | $47,564,245 |
| MARSHALL WACE, LLP | 3% | 1,467,524 | +61% | 0.04% | $41,868,462 |
| STATE STREET CORP | 2.6% | 1,302,162 | +4.8% | 0% | $37,150,682 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.5% | 1,226,116 | +2.9% | 0% | $34,988,106 |
| Divisadero Street Capital Management, LP | 2.3% | 1,159,955 | 1.5% | $33,093,516 | |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 2.1% | 1,060,806 | +11% | 0.04% | $30,264,796 |
| NEUBERGER BERMAN GROUP LLC | 2.1% | 1,050,282 | -3.3% | 0.02% | $29,954,828 |
| DIMENSIONAL FUND ADVISORS LP | 2% | 997,759 | +8.2% | 0.01% | $28,465,965 |
| Champlain Investment Partners, LLC | 2% | 971,111 | -17% | 0.35% | $27,705,797 |
| GW&K Investment Management, LLC | 1.9% | 963,415 | +1.2% | 0.24% | $27,486,000 |
| KENNEDY CAPITAL MANAGEMENT LLC | 1.7% | 834,155 | -0.38% | 0.5% | $23,798,442 |
| BANK OF AMERICA CORP /DE/ | 1.5% | 768,561 | +14% | 0% | $21,927,046 |
| TWO SIGMA INVESTMENTS, LP | 1.5% | 751,003 | +97% | 0.02% | $21,426,116 |
| First Light Asset Management, LLC | 1.5% | 729,521 | -38% | 1.9% | $20,813,234 |
| VOYA INVESTMENT MANAGEMENT LLC | 1.4% | 719,649 | +1% | 0.02% | $20,531,586 |
| MORGAN STANLEY | 1.4% | 719,162 | +108% | 0% | $20,517,698 |
| DAFNA Capital Management LLC | 1.2% | 597,431 | 0% | 3.9% | $17,044,706 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 1.2% | 585,353 | +15% | 0.01% | $16,700,121 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 50,013,349 | $1,462,601,752 | -$2,230,294 | $28.53 | 220 |
| 2025 Q4 | 48,743,756 | $1,928,695,662 | -$52,107,022 | $39.56 | 234 |
| 2025 Q3 | 48,137,442 | $1,696,572,476 | -$26,346,560 | $35.25 | 219 |
| 2025 Q2 | 48,899,026 | $1,601,933,467 | -$39,427,096 | $32.77 | 197 |
| 2025 Q1 | 50,269,592 | $1,621,969,076 | +$127,818,413 | $32.26 | 217 |
| 2024 Q4 | 46,483,344 | $1,421,304,781 | -$87,630,696 | $30.56 | 209 |
| 2024 Q3 | 49,264,286 | $1,381,109,066 | -$12,223,311 | $28.04 | 198 |
| 2024 Q2 | 50,723,505 | $1,155,009,424 | +$19,813,566 | $22.77 | 194 |
| 2024 Q1 | 49,351,679 | $1,501,026,424 | +$67,021,576 | $30.42 | 218 |
| 2023 Q4 | 47,164,039 | $1,683,028,664 | +$48,077,369 | $35.69 | 230 |
| 2023 Q3 | 45,425,624 | $1,988,207,852 | +$14,251,801 | $43.80 | 224 |
| 2023 Q2 | 45,005,948 | $2,219,137,443 | +$14,004,669 | $49.36 | 219 |
| 2023 Q1 | 44,806,862 | $1,857,210,760 | -$5,467,106 | $41.45 | 219 |
| 2022 Q4 | 44,912,321 | $1,992,625,452 | +$11,085,452 | $44.38 | 207 |
| 2022 Q3 | 44,732,086 | $1,747,349,909 | -$40,042,063 | $39.10 | 201 |
| 2022 Q2 | 44,464,969 | $1,816,797,154 | +$5,915,882 | $40.86 | 196 |
| 2022 Q1 | 44,016,086 | $2,889,958,812 | -$4,881,515 | $65.67 | 206 |
| 2021 Q4 | 44,091,364 | $3,064,833,086 | +$50,071,000 | $69.53 | 211 |
| 2021 Q3 | 43,335,200 | $3,014,938,884 | -$67,863,474 | $69.55 | 206 |
| 2021 Q2 | 44,284,173 | $3,513,197,655 | -$20,715,510 | $79.33 | 206 |
| 2021 Q1 | 44,587,200 | $2,919,424,135 | +$101,599,138 | $65.52 | 184 |
| 2020 Q4 | 44,006,691 | $2,449,180,355 | +$92,888,778 | $55.67 | 191 |
| 2020 Q3 | 42,560,668 | $1,698,181,209 | +$16,788,166 | $39.90 | 178 |
| 2020 Q2 | 41,949,121 | $1,885,283,353 | +$271,715,763 | $44.95 | 184 |
| 2020 Q1 | 36,027,641 | $1,210,074,214 | +$38,131,339 | $33.59 | 151 |