Security Snapshot

AtriCure, Inc. - Common Stock (ATRC) Institutional Ownership

CUSIP: 04963C209

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

233

Shares (Excl. Options)

48,743,718

Price

$39.56

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Type / Class
Equity / Common Stock
Symbol
ATRC on Nasdaq
Shares outstanding
49,704,831
Price per share
$28.53
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
48,743,718
Total reported value
$1,928,694,159
% of total 13F portfolios
0%
Share change
-1,572,767
Value change
-$51,557,701
Number of holders
233
Price from insider filings
$28.53
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Quick Takeaways

  • ATRC - AtriCure, Inc. - Common Stock is tracked under CUSIP 04963C209.
  • 233 institutions reported positions in Q4 2025.
  • 5 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 233 to 17 between Q4 2025 and Q1 2026.
  • Reported value moved from $1,928,694,159 to $9,885,168.

Why This Matters

  • 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.

Source Evidence

Source: SEC Form 13F

Latest holder context comes from 233 institutions filings for Q4 2025.

Open SEC Evidence

Investment Quick Answers

What is CUSIP 04963C209?
CUSIP 04963C209 identifies ATRC - AtriCure, Inc. - Common Stock in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

Significant Owners of AtriCure, Inc. - Common Stock (ATRC) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
WELLINGTON MANAGEMENT GROUP LLP 8% $125,190,744 3,969,269 Wellington Management Group LLP 30 Jun 2025
BlackRock, Inc. 7.8% $136,165,391 3,862,837 BlackRock, Inc. 30 Sep 2025
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
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 Dec 2025, 233 institutional investors reported holding 48,743,718 shares of AtriCure, Inc. - Common Stock (ATRC). This represents 98% of the company’s total 49,704,831 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of AtriCure, Inc. - Common Stock (ATRC) together control 75% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
VANGUARD GROUP INC 9.9% 4,903,755 +1.3% 0% $193,992,548
BlackRock, Inc. 8.2% 4,065,804 +1.7% 0% $160,843,227
WELLINGTON MANAGEMENT GROUP LLP 7.9% 3,917,991 -8.7% 0.03% $154,995,724
ALLIANCEBERNSTEIN L.P. 7.2% 3,563,582 +0.14% 0.04% $140,975,304
Hood River Capital Management LLC 6.2% 3,096,611 +1.7% 1.3% $122,501,931
NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 4.1% 2,038,703 0% 0.12% $80,651,000
STATE STREET CORP 2.5% 1,242,374 -1.7% 0% $49,148,315
GEODE CAPITAL MANAGEMENT, LLC 2.4% 1,191,498 +0.04% 0% $47,143,730
First Light Asset Management, LLC 2.4% 1,175,445 +32% 3.6% $46,500,604
Champlain Investment Partners, LLC 2.4% 1,173,605 -41% 0.47% $46,427,814
NEUBERGER BERMAN GROUP LLC 2.2% 1,086,326 -8.8% 0.03% $42,998,602
BNP PARIBAS ASSET MANAGEMENT Holding S.A. 1.9% 959,294 +25% 0.04% $37,950,000
GW&K Investment Management, LLC 1.9% 952,089 +11% 0.33% $37,665,000
DIMENSIONAL FUND ADVISORS LP 1.9% 921,897 +8.4% 0.01% $36,472,238
MARSHALL WACE, LLP 1.8% 913,453 +63% 0.03% $36,136,202
GOLDMAN SACHS GROUP INC 1.8% 885,062 +14% 0% $35,013,053
KENNEDY CAPITAL MANAGEMENT LLC 1.7% 837,326 +0.05% 0.7% $33,124,617
VOYA INVESTMENT MANAGEMENT LLC 1.4% 712,329 +0.74% 0.03% $28,179,735
BANK OF AMERICA CORP /DE/ 1.4% 675,731 -6.8% 0% $26,731,929
DAFNA Capital Management LLC 1.2% 597,431 +0.87% 5.5% $23,634,370
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 1.1% 569,723 -4% 0% $22,538,243
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 1% 511,213 +20% 0.01% $20,223,587
NORTHERN TRUST CORP 0.88% 438,210 -5.2% 0% $17,335,587
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.88% 437,883 +2.3% 0% $17,322,651
Defilade Capital Management, L.P. 0.8% 397,636 0% 2.1% $15,730,480

Institutional Holders of AtriCure, Inc. - Common Stock (ATRC) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 346,365 $9,885,168 -$3,512,386 $28.53 17
2025 Q4 48,743,718 $1,928,694,159 -$51,557,701 $39.56 233
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
2019 Q4 34,897,661 $1,134,489,738 +$6,242,315 $32.51 136
2019 Q3 34,971,951 $871,931,403 +$13,937,979 $24.94 137
2019 Q2 34,463,060 $1,029,347,018 +$21,797,776 $29.84 141
2019 Q1 34,483,338 $923,710,939 -$1,149,424 $26.79 157
2018 Q4 34,464,747 $1,053,958,551 +$87,376,454 $30.60 146
2018 Q3 31,486,078 $1,102,867,845 +$24,118,532 $35.03 126
2018 Q2 30,819,604 $833,657,253 +$6,641,664 $27.05 106
2018 Q1 30,696,727 $629,904,807 +$10,866,556 $20.52 108
2017 Q4 30,239,580 $551,579,395 +$5,432,912 $18.24 109
2017 Q3 29,692,968 $664,222,260 +$28,363,887 $22.37 114
2017 Q2 28,173,961 $683,211,428 -$25,680,378 $24.25 106
2017 Q1 29,274,269 $560,358,844 +$61,634,671 $19.15 98
2016 Q4 28,132,992 $550,550,714 +$39,513,282 $19.57 99
2016 Q3 26,389,549 $417,429,910 +$29,131,174 $15.82 99
2016 Q2 25,645,722 $362,366,046 -$7,392,034 $14.13 100
2016 Q1 25,932,783 $436,449,990 -$27,162,554 $16.83 113
2015 Q4 26,812,438 $601,390,870 -$14,290,126 $22.44 116
2015 Q3 27,006,984 $591,696,477 +$313,235 $21.91 120
2015 Q2 27,036,324 $666,161,962 +$19,775,170 $24.64 111
2015 Q1 26,265,089 $538,117,096 +$27,766,697 $20.49 109
2014 Q4 24,915,260 $497,299,607 +$34,977,590 $19.96 104
2014 Q3 23,044,014 $339,203,923 +$6,474,716 $14.72 110
2014 Q2 23,012,825 $421,949,569 +$8,269,318 $18.38 112
2014 Q1 22,218,123 $417,693,024 +$117,712,646 $18.81 113