AtriCure Ownership | Who Owns AtriCure?

Overview Forecast RevenueFinancials Chart Transcripts

AtriCure Ownership Summary

AtriCure is owned by 54.93% institutional investors, 3.19% insiders, and 41.87% retail investors. Vanguard group is the largest institutional shareholder, holding 10.28% of ATRC shares. Delaware Small Cap Core I is the top mutual fund, with 3.99% of its assets in AtriCure shares.

ATRC Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	AtriCure	54.93%	3.19%	41.87%
Sector	Healthcare Stocks	232.51%	10.72%	-143.23%
Industry	Medical Instruments & Supplies Stocks	31.73%	13.63%	54.64%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	4.90M	10.28%	$193.99M
Blackrock	4.62M	9.84%	$105.10M
Wellington management group llp	4.29M	9.03%	$151.30M
Blackrock funding, inc. /de	4.07M	8.53%	$160.84M
Alliancebernstein	3.56M	7.48%	$125.44M
Hood river capital management	3.05M	6.40%	$107.36M
Champlain investment partners	1.98M	4.16%	$69.73M
State street	1.26M	2.66%	$44.57M
Neuberger berman group	1.19M	2.50%	$41.97M
Geode capital management	1.19M	2.50%	$47.14M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Dafna capital management	592.27K	5.16%	$20.88M
First light asset management	890.36K	2.96%	$31.39M
Kent lake capital	250.00K	2.57%	$5.69M
Millrace asset group	70.05K	1.55%	$1.59M
Highmark wealth management	83.72K	1.35%	$3.31M
Hood river capital management	3.05M	1.27%	$107.36M
Knott david m jr	51.40K	0.94%	$2.03M
Riverwater partners	60.32K	0.92%	$2.39M
Perkins capital management	27.45K	0.86%	$1.09M
Alphacentric advisors	26.04K	0.79%	$795.63K

Top Buyers

Holder	Shares	% Assets	Change
Blackrock	4.62M	0.00%	384.73K
Wellington management group llp	4.29M	0.03%	322.82K
Point72 (difc)	262.06K	0.60%	262.06K
Kent lake capital	250.00K	2.57%	250.00K
Kennedy capital management	836.92K	0.65%	222.53K

Top Sellers

Holder	Shares	% Assets	Change
Macquarie group	-	-	-2.29M
Fiera capital	-	-	-918.21K
Timessquare capital management	-	-	-854.55K
Loomis sayles & co l p	-	-	-808.42K
Jennison associates	-	-	-593.27K

New Positions

Holder	Shares	% Assets	Change	Value
Kent lake capital	250.00K	2.57%	250.00K	$5.69M
Norges bank	214.02K	0.00%	214.02K	$8.47M
First eagle investment management	116.61K	0.01%	116.61K	$4.61M
Grandeur peak global advisors	78.90K	0.37%	78.90K	$2.78M
F/m investments	72.59K	0.11%	72.59K	$2.87M

Sold Out

Holder	Change
Principal securities	-5.00
Bokf, na	-8.00
Newedge advisors	-10.00
Stephens consulting	-20.00
Continuum advisory	-24.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	153	-30.77%	26,192,658	-45.59%	54	0.54%	78	-27.10%	47	-39.74%
Sep 30, 2025	210	9.95%	47,939,371	8.74%	100	1.17%	100	7.53%	78	18.18%
Jun 30, 2025	199	-9.95%	48,911,144	-2.70%	102	0.91%	94	-18.26%	72	14.29%
Mar 31, 2025	218	2.35%	50,044,148	7.76%	105	1.09%	112	2.75%	63	-11.27%
Dec 31, 2024	212	6.53%	46,334,587	-5.81%	98	0.90%	108	12.50%	72	-5.26%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Delaware Small Cap Core I	1.95M	3.99%	118.04K
Macquarie Small Cap Core I	1.89M	3.80%	-141.92K
Hood River Small-Cap Growth Instl	1.64M	3.30%	-20.57K
Vanguard US Total Market Shares ETF	1.48M	2.99%	-
Vanguard Total Stock Mkt Idx Inv	1.46M	2.94%	-30.69K
Champlain Small Company Fund, LLC	1.33M	2.68%	-3.90K
iShares Russell 2000 ETF	1.17M	2.35%	-
Vanguard Small Cap Index	1.14M	2.29%	-7.76K
AB Small Cap Growth A	1.01M	2.03%	-15.02K
AB Discovery Growth A	771.18K	1.55%	-7.92K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Nov 25, 2025	WEHRWEIN SVEN	-	Sell	$188.75K
Nov 24, 2025	WEHRWEIN SVEN	-	Sell	$187.83K
Nov 26, 2025	Noznesky Justin J	Chief Mktg & Strategy Officer	Sell	$192.64K
Nov 21, 2025	Yuen Maggie	-	Sell	$107.16K
Sep 12, 2025	Noznesky Justin J	Chief Mktg & Strategy Officer	Sell	$108.90K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	4
2025 Q3	-	5
2025 Q2	-	1
2025 Q1	-	1
2024 Q4	-	-

ATRC Ownership FAQ

Who Owns AtriCure?

AtriCure shareholders are primarily institutional investors at 54.93%, followed by 3.19% insiders and 41.88% retail investors. The average institutional ownership in AtriCure's industry, Medical Instruments & Supplies Stocks, is 31.73%, which AtriCure exceeds.

Who owns the most shares of AtriCure?

AtriCure’s largest shareholders are Vanguard group (4.9M shares, 10.28%), Blackrock (4.62M shares, 9.84%), and Wellington management group llp (4.29M shares, 9.03%). Together, they hold 29.15% of AtriCure’s total shares outstanding.

Does Blackrock own AtriCure?

Yes, BlackRock owns 9.84% of AtriCure, totaling 4.62M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 105.1M$. In the last quarter, BlackRock increased its holdings by 384.73K shares, a 9.09% change.

Who is AtriCure’s biggest shareholder by percentage of total assets invested?

Dafna capital management is AtriCure’s biggest shareholder by percentage of total assets invested, with 5.16% of its assets in 592.27K AtriCure shares, valued at 20.88M$.

Who is the top mutual fund holder of AtriCure shares?

Delaware Small Cap Core I is the top mutual fund holder of AtriCure shares, with 3.99% of its total shares outstanding invested in 1.95M AtriCure shares.

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