AtriCure Ownership | Who Owns AtriCure?
AtriCure Ownership Summary
AtriCure is owned by 38.76% institutional investors, 3.76% insiders, and 57.48% retail investors. Vanguard group is the largest institutional shareholder, holding 10.28% of ATRC shares. Delaware Small Cap Core I is the top mutual fund, with 3.99% of its assets in AtriCure shares.
ATRC Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | AtriCure | 38.76% | 3.76% | 57.48% |
| Sector | Healthcare Stocks | 35.58% | 11.87% | 52.55% |
| Industry | Medical Instruments & Supplies Stocks | 35.51% | 13.37% | 51.13% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Vanguard group | 4.90M | 10.28% | $193.99M |
| Blackrock | 4.62M | 9.84% | $105.10M |
| Blackrock funding, inc. /de | 4.04M | 8.47% | $115.34M |
| Wellington management group llp | 3.38M | 7.08% | $96.50M |
| Alliancebernstein | 3.26M | 6.82% | $128.92M |
| Hood river capital management | 3.12M | 6.53% | $88.94M |
| Macquarie management | 1.80M | 3.78% | $51.49M |
| Goldman sachs group | 1.67M | 3.49% | $47.56M |
| Marshall wace, llp | 1.47M | 3.07% | $41.87M |
| State street | 1.30M | 2.73% | $37.15M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Dafna capital management | 597.43K | 3.88% | $17.04M |
| Kent lake capital | 250.00K | 2.57% | $5.69M |
| Grandeur peak global advisors | 381.90K | 2.55% | $10.90M |
| First light asset management | 729.52K | 1.87% | $20.81M |
| Millrace asset group | 70.05K | 1.55% | $1.59M |
| Divisadero street capital management, lp | 1.16M | 1.38% | $33.09M |
| Highmark wealth management | 83.72K | 0.97% | $2.39M |
| Hood river capital management | 3.12M | 0.89% | $88.94M |
| Knott david m jr | 51.40K | 0.87% | $1.47M |
| Alphacentric advisors | 26.04K | 0.79% | $795.63K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Divisadero street capital management, lp | 1.16M | 1.38% | 1.16M |
| Goldman sachs group | 1.67M | 0.01% | 782.10K |
| Marshall wace, llp | 1.47M | 0.04% | 554.07K |
| Blackrock | 4.62M | 0.00% | 384.73K |
| Morgan stanley | 719.16K | 0.00% | 373.05K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Macquarie group | - | - | -2.29M |
| Fiera capital | - | - | -918.21K |
| Timessquare capital management | - | - | -854.55K |
| Loomis sayles & co l p | - | - | -808.42K |
| Jennison associates | - | - | -593.27K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Vanguard fiduciary trust | 342.85K | 0.00% | 342.85K | $9.78M |
| Arrowstreet capital, limited partnership | 277.68K | 0.00% | 277.68K | $7.92M |
| Kent lake capital | 250.00K | 2.57% | 250.00K | $5.69M |
| Norges bank | 214.02K | 0.00% | 214.02K | $8.47M |
| Hrt financial lp | 67.07K | 0.00% | 67.07K | $1.91M |
Sold Out
| Holder | Change |
|---|---|
| Tfc financial management | -1.00 |
| Dunhill financial | -1.00 |
| Sbi securities | -2.00 |
| Clearstead advisors | -3.00 |
| Principal securities | -5.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 119 | -48.93% | 18,506,055 | -62.03% | 38 | 0.37% | 52 | -59.69% | 38 | -47.95% |
| Dec 31, 2025 | 153 | -30.77% | 26,192,658 | -45.59% | 54 | 0.54% | 78 | -27.10% | 47 | -39.74% |
| Sep 30, 2025 | 210 | 9.95% | 47,939,371 | 8.74% | 100 | 1.17% | 100 | 7.53% | 78 | 18.18% |
| Jun 30, 2025 | 199 | -9.95% | 48,911,144 | -2.70% | 102 | 0.91% | 94 | -18.26% | 72 | 14.29% |
| Mar 31, 2025 | 218 | 2.35% | 50,044,148 | 7.76% | 105 | 1.09% | 112 | 2.75% | 63 | -11.27% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Delaware Small Cap Core I | 1.95M | 3.99% | 118.04K |
| Macquarie Small Cap Core I | 1.89M | 3.80% | -141.92K |
| Hood River Small-Cap Growth Instl | 1.64M | 3.23% | - |
| Vanguard Total Stock Mkt Idx Inv | 1.52M | 3.00% | 4.38K |
| Vanguard US Total Market Shares ETF | 1.48M | 2.99% | - |
| Nomura US Small Cap Core Equity | 1.44M | 2.84% | 1.44M |
| Nomura Small Cap Core I | 1.44M | 2.84% | -45.71K |
| iShares Russell 2000 ETF | 1.14M | 2.24% | 9.59K |
| Vanguard Small Cap Index | 1.09M | 2.16% | 289.00 |
| Champlain Small Company Fund, LLC | 924.47K | 1.83% | -4.22K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 20, 2026 | Prange Karen | - | Sell | $85.95K |
| May 15, 2026 | Doraiswamy Vinayak | Chief Scientific Officer | Sell | $140.65K |
| Mar 12, 2026 | Doraiswamy Vinayak | Chief Scientific Officer | Sell | $149.15K |
| Nov 24, 2025 | WEHRWEIN SVEN | - | Sell | $187.83K |
| Nov 25, 2025 | WEHRWEIN SVEN | - | Sell | $188.75K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | - | 2 |
| 2026 Q1 | - | 1 |
| 2025 Q4 | - | 4 |
| 2025 Q3 | - | 5 |
| 2025 Q2 | - | 1 |
ATRC Ownership FAQ
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