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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 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
27
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 4 listed it in both
Shares listed
12,834,671
combined, among listed positions
Reported value
$508m
combined, at the quarter end

Among the 92 comparable managers: 13 buyers (opened or added shares) and 14 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -68,863.

Managers listing ATRC in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

27 of 27 holders

ActionFiling
Wellington Management Group LLP3,917,991$155munder 0.1%Trimmed-374,09617 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP3,563,582$141munder 0.1%Added+4,99017 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC1,086,326$43munder 0.1%Trimmed-104,78527 Oct 2026 (the filing on sec.gov)
Marshall Wace LLP913,453$36munder 0.1%Added+354,28113 Feb 2026 (the filing on sec.gov)
MFS Investment Management511,213$20munder 0.1%Added+86,53222 Jan 2026 (the filing on sec.gov)
Two Sigma Investments LP380,499$15munder 0.1%Trimmed-72,37617 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC321,900$13munder 0.1%Added+63,10012 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)285,759$11munder 0.1%Trimmed-108,23717 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP277,924$11munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP277,700$11munder 0.1%Trimmed-79,30017 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC242,741$9.6munder 0.1%Added+197,24217 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC220,290$8.7munder 0.1%Trimmed-53,45917 Feb 2026 (the filing on sec.gov)
Millennium Management LLC163,795$6.5munder 0.1%Trimmed-189,46517 Feb 2026 (the filing on sec.gov)
First Eagle Investment Management LLC116,609$4.6munder 0.1%Newnew4 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC99,956$4.0munder 0.1%Added+15,78417 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC85,803$3.4munder 0.1%Trimmed-88,88613 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC82,883$3.3munder 0.1%Trimmed-36,27410 Feb 2026 (the filing on sec.gov)
Invesco Ltd74,435$2.9munder 0.1%Added+5,46219 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC52,620$2.1munder 0.1%Trimmed-45,18512 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc50,577$2.0munder 0.1%Added+2,12117 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd22,883$905kunder 0.1%Held017 Feb 2026 (the filing on sec.gov)
PDT Partners LLC21,201$839k0.05%Trimmed-2,50017 Feb 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP19,978$790kunder 0.1%Added+6,37117 Feb 2026 (the filing on sec.gov)
Man Group PLC17,401$688kunder 0.1%Trimmed-42,09417 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC11,301$447kunder 0.1%Trimmed-6,45113 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, 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 (4)

Exited (1)

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 →