AtriCure, Inc.
ATRC- Exchange
- Nasdaq
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001323885
In the last 90 days, AtriCure, Inc. insiders filed 0 open-market purchases and 10 sales; 251 institutions reported holding it in 13F filings for Q2 2026, worth $1.47B in total; no superinvestor holds it.
Holders of 5% or more of ATRC
Holders whose latest Schedule 13D or 13G filing reports 5% or more of AtriCure, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Wellington Management Group LLP | 13G | 8.00%3.97M shares | New | Aug 12, 20251 filing | Aug 12, 2025 | SEC |
| Hood River Capital Management LLC | 13G/A | 6.00%2.92M shares | – | Feb 14, 20251 filing | Feb 14, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
6 Schedule 13D and 13G filings on AtriCure, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Nov 13, 20251:55 PM ET | Macquarie Group Ltdand 2 others | 13G/A | 4.60%2.29M shares | −0.46 ppfrom 5.06%Below 5% | Sep 30, 2025 | SEC |
| Aug 12, 202511:56 AM ET | Macquarie Group Ltdand 2 others | 13G | 5.06%2.50M shares | New | Jun 30, 2025 | SEC |
| Aug 12, 202510:34 AM ET | Wellington Management Group LLPand 3 others | 13G | 8.00%3.97M shares | New | Jun 30, 2025 | SEC |
| May 14, 20254:02 PM ET | Champlain Investment Partners, LLC | 13G | 4.40%2.14M shares | −1.30 ppfrom 5.70%Below 5% | Mar 31, 2025 | SEC |
| Feb 14, 20258:00 AM ET | Hood River Capital Management LLC | 13G/A | 6.00%2.92M shares | – | Dec 31, 2024 | SEC |
| Nov 12, 202410:24 AM ET | Champlain Investment Partners, LLC | 13G | 5.70%2.79M shares | New | Sep 30, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell AtriCure, Inc. shares.
No Form 144 notices for AtriCure, Inc. are on file.