How many institutional investors hold ATRC?

2 tracked institutional investors disclosed a position in ATRC (ATRICURE INC) in their most recent 13F filing.

Who is the largest institutional holder of ATRC?

Ken Griffin, Citadel Advisors, holds the largest disclosed position in ATRC, valued at $10M.

Where does this ATRC ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

ATRC — ATRICURE INC

Name: ATRICURE INC (ATRC) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

About ATRICURE INC (ATRC)

ATRICURE INC (ATRC) appears in the most recent 13F filings of 2 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $10M. Across recent filings, tracked investors recorded 2 new positions, 0 increased, 0 reduced, and 0 exited. All data sourced from SEC 13F filings.

Tracked investors reporting ATRC

Investor	Firm	Shares	Market value	% of portfolio	As of
Ken Griffin	Citadel Advisors	242.7K	$9.6M	0.01%	Dec 31, 2025
Ray Dalio	Bridgewater Associates	33.5K	$956.2K	0.00%	Mar 31, 2026

Ken GriffinDec 31, 2025
Citadel Advisors
Shares
242.7K
Value
$9.6M
% Portfolio
0.01%
Ray DalioMar 31, 2026
Bridgewater Associates
Shares
33.5K
Value
$956.2K
% Portfolio
0.00%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Ray Dalio	New	—	$956.2K	May 15, 2026
Ken Griffin	New	—	$1.9M	Nov 14, 2025

Ray Dalio
New
$956.2KMay 15, 2026
Ken Griffin
New
$1.9MNov 14, 2025

Frequently asked questions

How many institutional investors hold ATRC?: 2 tracked institutional investors disclosed a position in ATRC (ATRICURE INC) in their most recent 13F filing.
Who is the largest institutional holder of ATRC?: Ken Griffin, Citadel Advisors, holds the largest disclosed position in ATRC, valued at $10M.
Did institutional ownership of ATRC increase or decrease?: Across recent 13F filings, tracked investors recorded 2 new positions, 0 increased, 0 reduced, and 0 fully exited ATRC.
Where does this ATRC ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.