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ATRC in the 13F filings

Atricure Inc · CUSIP 04963C209

Sector · Medical devices and instrumentsTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Surgical, medical and electromedical devices
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
26
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 5 listed it in both
Shares listed
12,834,013
combined, among listed positions
Reported value
$402m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 18 buyers (opened or added shares) and 13 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +277,042.

Managers listing ATRC in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

26 of 26 holders

ActionFiling
AllianceBernstein LP3,258,872$129munder 0.1%Trimmed-304,71015 May 2026 (the filing on sec.gov)
Wellington Management Group LLP3,382,555$97munder 0.1%Trimmed-535,43615 May 2026 (the filing on sec.gov)
Marshall Wace LLP1,467,524$42munder 0.1%Added+554,07115 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC1,050,282$30munder 0.1%Trimmed-36,04427 Oct 2026 (the filing on sec.gov)
Two Sigma Investments LP751,003$21munder 0.1%Added+370,50415 May 2026 (the filing on sec.gov)
MFS Investment Management585,353$17munder 0.1%Added+74,14014 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)336,814$9.6munder 0.1%Added+51,05515 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC308,700$8.8munder 0.1%Trimmed-13,20014 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP277,682$7.9munder 0.1%Newnew14 May 2026 (the filing on sec.gov)
First Eagle Investment Management LLC262,143$7.5munder 0.1%Added+145,53414 May 2026 (the filing on sec.gov)
AQR Capital Management LLC186,382$5.3munder 0.1%Added+86,42615 May 2026 (the filing on sec.gov)
Millennium Management LLC179,886$5.1munder 0.1%Added+16,09115 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC101,682$2.9munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Voloridge Investment Management LLC97,182$2.8munder 0.1%Trimmed-123,10815 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC88,852$2.5munder 0.1%Added+5,96913 May 2026 (the filing on sec.gov)
Citadel Advisors LLC87,347$2.5munder 0.1%Trimmed-155,39415 May 2026 (the filing on sec.gov)
Man Group PLC85,116$2.4munder 0.1%Added+67,71515 May 2026 (the filing on sec.gov)
Invesco Ltd77,316$2.2munder 0.1%Added+2,88112 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc60,285$1.7munder 0.1%Added+9,70815 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.56,589$1.6munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP38,777$1.1munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Bridgewater Associates LP33,517$956kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd22,883$653kunder 0.1%Held018 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC17,299$494kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Caxton Associates LLP10,472$299kunder 0.1%Added+3,58714 May 2026 (the filing on sec.gov)
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Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (6)

Exited (6)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
4 in Q3 2024 to 3 in Q2 2026

Tracked managers listing it, at least.

035810201820192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ATRC by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20131$569kn.a.n.a.
Q2 20141$5.5mn.a.n.a.
Q3 20171$1.5mn.a.n.a.
Q4 20171$1.2mn.a.n.a.
Q1 20181$1.3mn.a.n.a.
Q2 20181$1.2mn.a.n.a.
Q3 20182$2.1mn.a.n.a.
Q4 20183$12mn.a.n.a.
Q1 20192$1.8mn.a.n.a.
Q2 20192$19mn.a.n.a.
Q4 20191$8.5mn.a.n.a.
Q1 20204$41mn.a.n.a.
Q2 20202$37mn.a.n.a.
Q3 20203$30mn.a.n.a.
Q4 20204$73mn.a.n.a.
Q1 20215$254mn.a.n.a.
Q2 20214$278mn.a.n.a.
Q3 20214$273mn.a.n.a.
Q4 20213$254mn.a.n.a.
Q1 20223$268mn.a.n.a.
Q2 20222$165mn.a.n.a.
Q3 20223$162mn.a.n.a.
Q4 20222$159mn.a.n.a.
Q1 20233$155mn.a.n.a.
Q2 20234$211mn.a.n.a.
Q3 20234$201mn.a.n.a.
Q4 20233$125m30
Q1 20242$140m20
Q2 20242$109m20
Q3 20244$151m31
Q4 20244$157m13
Q1 202510$284m81
Q2 20256$335m33
Q3 20254$290m12
Q4 20256$381m1314
Q1 20263$178m1813
Q2 20263$125m1513

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

ATRC and LLY →ATRC and JNJ →ATRC and VRTX →Choose a stock to compare with ATRC →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own ATRC, latest filings →Back to the 13F Explorer →