$ATRC

$61.51 +$0.43 (0.7%) Close

$ATRC Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 50.9M shares outstanding

Who owns ATRC?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 49.2%

BlackRock, Inc. 8.8% · Wellington Management Group LLP 6.9%

Institutional ownership

100.0%

+1.7 pts vs last qtr

Institutional holders

248

+24 vs last qtr

Net shares bought

+2.2M

by institutions in Q2 2026

New / sold out

50 / 26

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Arrowstreet Capital, Limited Partnership +1.0M
Point72 Asset Management, L.P. NEW +604.4K

Biggest sellers in Q2 2026

Voya Investment Management LLC −691.3K
Alliancebernstein L.P. −490.5K

Who is planning to sell?

Notices of proposed sale, last 12 months

$4.39M

17 notices from 8 people

Shares covered

106.0K

0.21% of the company

Arranged in advance

20%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Sven Wehrwein Director $1.34M
Salvatore Privitera Officer 10b5-1 $880K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2019–FY2025

+27.0%

+4.07% a year

Each share's claim on the business

−21.3%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $218M

over 7 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years65% 3–5 years7% 1–3 years11% Under 1 year16%

Quarterly turnover

11.6%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting ATRC on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	4.5M	8.80%	+431.9K (+10.7%)	≤2021	0.0%
Shares held by quarter Peak holding4.5M (Q2'26) Change over 8 quarters+168.7K Share of the company8.800% BlackRock, Inc.'s full portfolio →
WM Wellington Management Group LLP	3.5M	6.87%	+113.0K (+3.3%)	≤2021	0.0%
Shares held by quarter Peak holding4.3M (Q3'25) Change over 8 quarters+2.0M Share of the company6.870% Wellington Management Group LLP's full portfolio →

BlackRock, Inc.

4.5M

% of company

8.80%

Change vs last qtr

+431.9K (+10.7%)

Held since

≤2021

Wellington Management Group LLP

3.5M

% of company

6.87%

Change vs last qtr

+113.0K (+3.3%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding AtriCure, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ATRC on Form N-PORT; together they hold 40.7% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
HR Hood River Small-Cap Growth Fund Manager Directed Portfolios	$42.7M	1.5M	3.00%	0.64%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$42.5M	1.5M	2.99%	0.00%	June 30, 2026

Hood River Small-Cap Growth Fund

Manager Directed Portfolios

Position value

$42.7M

% of company

3.00%

% of the fund

0.64%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$42.5M

% of company

2.99%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding AtriCure, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
CM Carrel Michael H Insider	794.9K	1.56%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company1.560% Carrel Michael H's insider activity →
SD Seith Douglas J Insider	233.4K	0.46%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.460% Seith Douglas J's insider activity →

Carrel Michael H

Insider

794.9K

% of company

1.56%

Change vs last qtr

—

Held since

—

Seith Douglas J

Insider

233.4K

% of company

0.46%

Change vs last qtr

—

Held since

—

14 more holders behind a free account

See every insider and 5%+ holder of AtriCure, Inc..

Comments