AtriCure
ATRC · NASDAQ
$57.67+$2.14 (+3.85%)TodayMarket closed ·
Prev close $55.53
Who owns ATRC
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 47.7% of ATRC’s shares.
- BlackRock Institutional Trust Company, N.A.7.6%
- Wellington Management Company, LLP6.9%
- Vanguard Portfolio Management, LLC6.1%
- Hood River Capital Management LLC5.7%
- Next 6 largest institutions21.4%
- All other shareholders52.3%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 3.85M | 7.56% |
| Wellington Management Company, LLP | 3.50M | 6.87% |
| Vanguard Portfolio Management, LLC | 3.13M | 6.15% |
| Hood River Capital Management LLC | 2.91M | 5.71% |
| AllianceBernstein L.P. | 2.77M | 5.44% |
| Vanguard Capital Management, LLC | 2.19M | 4.31% |
| Nomura Investment Management Business Trust | 1.73M | 3.41% |
| Goldman Sachs Asset Management, L.P. | 1.47M | 2.89% |
| State Street Investment Management (US) | 1.39M | 2.73% |
| Marshall Wace LLP | 1.33M | 2.62% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Hood River Small-Cap Growth Fund | 1.53M | 3.00% |
| Vanguard Total Stock Market Index Fund | 1.52M | 2.99% |
| Nomura Small Cap Core Fund | 1.38M | 2.71% |
| iShares Russell 2000 ETF | 1.29M | 2.54% |
| Vanguard Small-Cap Index Fund | 1.11M | 2.18% |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Gilbert CisnerosHouse | Purchase | $1K–$15K | Aug 20, 2026 |
| Gil CisnerosHouse | Purchase | $1K–$15K | Mar 3, 2026 |
Short interest
Settled Sep 30, 2026
- Shares short
- 4.82M
- Days to cover
- 2.61
- % of shares outstanding
- 9.47%
- Average daily volume
- 1.85M
- Change since last report
- +12.6%
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