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SIMPLEX TRADING, LLC

Position in ATRC — AtriCure, Inc.

CIK 1488542 CHICAGO, IL

Position in ATRC

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$84,891
+$13,224 QoQ
Shares Held
3,034
+20.8% QoQ
Ownership
0.006%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#197
of 252 holders
Holding Since
Jun 2020
10 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in ATRC Over Time

Shares Held

Position Value (USD)

Position in Medical Instruments & Supplies

Healthcare · as of Jun 30, 2026

SIMPLEX TRADING, LLC holds $12,800,862 across 24 Medical Instruments & Supplies names. ATRC ranks #13 (0.7% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in ATRC

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10 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $84,891 3,034
2026-03-31 $71,667 2,512
2024-09-30 $2,046 73
2024-03-31 $121,406 3,991
2022-12-31 $22,190 500
2022-09-30 $45,277 1,158
2021-09-30 $5,633 81
2021-06-30 $6,425 81
2020-12-31 $37,799 679
2020-06-30 $98,350 2,188