AtriCure
ATRC
223 hedge funds and large institutions have $1.7B invested in AtriCure in 2025 Q3 according to their latest regulatory filings, with 34 funds opening new positions, 70 increasing their positions, 82 reducing their positions, and 11 closing their positions.
209% more first-time investments, than exits
New positions opened: 34 | Existing positions closed: 11
11% more funds holding
Funds holding: 201 → 223 (+22)
6% more capital invested
Capital invested by funds: $1.6B → $1.7B (+$94.6M)
1.93% less ownership
Funds ownership: 98.81% → 96.88% (-1.9%)
15% less repeat investments, than reductions
Existing positions increased: 70 | Existing positions reduced: 82
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Massachusetts Financial Services
Boston,
Massachusetts
|
+$14.6M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
+$11.1M |
| 3 |
PD
Point72 (DIFC)
Dubai,
United Arab Emirates
|
+$9.03M |
| 4 |
KCM
Kennedy Capital Management
St Louis,
Missouri
|
+$7.67M |
| 5 |
OAM
Oberweis Asset Management
Lisle,
Illinois
|
+$5.29M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
UBS AM
Chicago,
Illinois
|
-$21M |
| 2 |
Marshall Wace
London,
United Kingdom
|
-$15.4M |
| 3 |
N
Nuveen
Charlotte,
North Carolina
|
-$13.1M |
| 4 |
Macquarie Group
Sydney, NSW 2000,
Australia
|
-$7.37M |
| 5 |
GKIM
GW&K Investment Management
Boston,
Massachusetts
|
-$5.08M |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
226
Calamos Advisors
Naperville,
Illinois
| – | -$397K | -12,126 | Closed |
|
227
Norges Bank
Oslo,
Norway
| – | -$342K | -10,438 | Closed |
|
|
CCIA
228
Campbell & Co Investment Adviser
Baltimore,
Maryland
| – | -$284K | -8,681 | Closed |
|
229
D.E. Shaw & Co
New York
| – | -$255K | -7,776 | Closed |
|
|
B
230
Bailard
Foster City,
California
| – | -$213K | -6,500 | Closed |
|
231
Northwestern Mutual Wealth Management
Milwaukee,
Wisconsin
| – | -$4.1K | -125 | Closed |
|
|
CTC
232
Central Trust Company
Jefferson City,
Missouri
| – | -$1.15K | -35 | Closed |
|
ATRC Hedge Fund Activity: Q3 2025 in Review
223 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in AtriCure (ATRC) for Q3 2025, worth a combined $1.7B — up 5.9% from $1.6B a quarter earlier.
Buyers outnumbered sellers: 34 funds opened new ATRC positions and 11 closed out — a net gain of 23 holders — while 70 added to existing stakes and 82 trimmed.
The largest buyer was Massachusetts Financial Services, opening a new position worth an estimated $14.6M. The largest seller was UBS AM, cutting an estimated $21M.
- 223 institutional investors held AtriCure (ATRC) as of Q3 2025, up from 201 in Q2 2025.
- Funds reported $1.7B of AtriCure stock for Q3 2025, up 5.9% quarter-over-quarter.
- 34 funds opened new AtriCure positions in Q3 2025 and 11 closed out, a net change of +23 holders.
- The largest AtriCure buyer in Q3 2025 was Massachusetts Financial Services, an estimated $14.6M added.
- The largest AtriCure seller in Q3 2025 was UBS AM, an estimated $21M sold.
Based on aggregated 13F filings for Q3 2025.