What does CUSIP 04963C209 represent in this 13F holders report?

CUSIP 04963C209 is the security identifier for ATRC - AtriCure, Inc. - Common Stock used to aggregate holder disclosures.

How many institutions held ATRC - AtriCure, Inc. - Common Stock in Q1 2018?

108 institutional investors reported ATRC - AtriCure, Inc. - Common Stock for Q1 2018. Use the holders table for investor-level position and value details.

AtriCure, Inc. - Common Stock (ATRC)

CUSIP: 04963C209

Q1 2018 13F Holders as of 31 Mar 2018

Type / Class: Equity / Common Stock
Shares outstanding: 49,704,831
Total 13F shares: 30,696,727
Share change: +457,147
Total reported value: $629,904,807
Price per share: $20.52
Number of holders: 108
Value change: +$10,866,556
Number of buys: 43
Number of sells: 59

Quarterly Holders Quick Answers

What is CUSIP 04963C209?
CUSIP 04963C209 identifies ATRC - AtriCure, Inc. - Common Stock in SEC institutional holdings data.

Need full ownership history?
Open the full security ownership history page.

Related Filing Research

Latest 13F filings for newly reported positions.
Latest Schedule 13D/13G reports for ownership changes outside 13F cadence.
Latest 10-Q/10-K reports for financial context tied to this issuer.
Recent insider transactions for executive and insider activity.
SEC investors directory and top value investors for manager drilldown.
Back to full security ownership history.

Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q2 2018
Previous quarter: Q4 2017

Recent filing periods for CUSIP 04963C209:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of ATRC - AtriCure, Inc. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
FMR LLC	13F	Company	10%	5,169,500	$94,291,000	—	31 Dec 2017	13F
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	9.1%	4,507,903	$82,224,000	—	31 Dec 2017	13F
BlackRock Finance, Inc.	13F	Company	5.5%	2,731,558	$49,823,000	—	31 Dec 2017	13F
Hudson Executive Capital LP	13F	Company	4%	2,005,610	$36,582,000	—	31 Dec 2017	13F
VANGUARD GROUP INC	13F	Company	3%	1,489,956	$27,178,000	—	31 Dec 2017	13F
PEREGRINE CAPITAL MANAGEMENT LLC	13F	Company	2.3%	1,134,406	$20,692,000	—	31 Dec 2017	13F
First Light Asset Management, LLC	13F	Company	2.2%	1,075,447	$19,616,000	—	31 Dec 2017	13F
VICTORY CAPITAL MANAGEMENT INC	13F	Company	2.2%	1,068,895	$19,497,000	—	31 Dec 2017	13F
LOOMIS SAYLES & CO L P	13F	Company	1.7%	829,195	$15,125,000	—	31 Dec 2017	13F
Neuberger Berman Group LLC	13F	Company	1.6%	816,524	$14,895,000	—	31 Dec 2017	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	1.5%	736,960	$13,442,000	—	31 Dec 2017	13F
STATE STREET CORP	13F	Company	1.4%	673,029	$12,281,000	—	31 Dec 2017	13F
EMERALD ADVISERS, LLC	13F	Company	1.1%	553,411	$10,094,000	—	31 Dec 2017	13F
EMERALD MUTUAL FUND ADVISERS TRUST	13F	Company	0.98%	489,106	$8,921,000	—	31 Dec 2017	13F
Cortina Asset Management, LLC	13F	Company	0.86%	426,465	$7,779,000	—	31 Dec 2017	13F
WASATCH ADVISORS LP	13F	Company	0.85%	422,004	$7,697,000	—	31 Dec 2017	13F
NORTHERN TRUST CORP	13F	Company	0.85%	420,791	$7,675,000	—	31 Dec 2017	13F
DAFNA Capital Management LLC	13F	Company	0.78%	389,145	$7,098,000	—	31 Dec 2017	13F
CITADEL ADVISORS LLC	13F	Company	0.76%	378,639	$6,906,000	—	31 Dec 2017	13F
ROYCE & ASSOCIATES LP	13F	Company	0.59%	290,799	$5,304,000	—	31 Dec 2017	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.56%	277,755	$5,066,000	—	31 Dec 2017	13F
LORD, ABBETT & CO. LLC	13F	Company	0.49%	245,653	$4,481,000	—	31 Dec 2017	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.48%	240,032	$4,378,000	—	31 Dec 2017	13F
AlphaOne Investment Services, LLC	13F	Company	0.46%	229,725	$4,190,000	—	31 Dec 2017	13F
Bank of New York Mellon Corp	13F	Company	0.41%	202,576	$3,695,000	—	31 Dec 2017	13F
Tamarack Advisers, LP	13F	Company	0.35%	175,000	$3,192,000	—	31 Dec 2017	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.35%	173,033	$3,157,000	—	31 Dec 2017	13F
D. E. Shaw & Co., Inc.	13F	Company	0.31%	153,527	$2,800,000	—	31 Dec 2017	13F
Allianz Asset Management GmbH	13F	Company	0.3%	150,782	$2,750,000	—	31 Dec 2017	13F
MORGAN STANLEY	13F	Company	0.29%	145,578	$2,656,000	—	31 Dec 2017	13F
ESSEX INVESTMENT MANAGEMENT CO LLC	13F	Company	0.29%	145,258	$2,650,000	—	31 Dec 2017	13F
KOPP INVESTMENT ADVISORS LLC	13F	Company	0.26%	127,435	$2,324,000	—	31 Dec 2017	13F
DEUTSCHE BANK AG\	13F	Company	0.24%	117,504	$2,141,000	—	31 Dec 2017	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.22%	110,742	$2,020,000	—	31 Dec 2017	13F
TWO SIGMA ADVISERS, LP	13F	Company	0.22%	108,200	$1,974,000	—	31 Dec 2017	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.21%	104,167	$1,900,000	—	31 Dec 2017	13F
MACQUARIE GROUP LTD	13F	Company	0.2%	100,056	$1,825,000	—	31 Dec 2017	13F
PERKINS CAPITAL MANAGEMENT INC	13F	Company	0.18%	88,550	$1,615,000	—	31 Dec 2017	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.17%	84,360	$1,539,000	—	31 Dec 2017	13F
TEACHERS ADVISORS, LLC	13F	Company	0.16%	78,851	$1,438,000	—	31 Dec 2017	13F
QUANTUM CAPITAL MANAGEMENT	13F	Company	0.16%	77,907	$1,421,000	—	31 Dec 2017	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.15%	76,029	$1,387,000	—	31 Dec 2017	13F
Skylands Capital, LLC	13F	Company	0.15%	75,000	$1,368,000	—	31 Dec 2017	13F
UNITED SERVICES AUTOMOBILE ASSOCIATION	13F	Company	0.15%	73,132	$1,334,000	—	31 Dec 2017	13F
PDT Partners, LLC	13F	Company	0.13%	66,366	$1,211,000	—	31 Dec 2017	13F
Nuveen Asset Management, LLC	13F	Company	0.12%	60,981	$1,112,000	—	31 Dec 2017	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.12%	59,372	$1,083,000	—	31 Dec 2017	13F
GSA CAPITAL PARTNERS LLP	13F	Company	0.11%	54,712	$998,000	—	31 Dec 2017	13F
Swiss National Bank	13F	Company	0.11%	54,700	$998,000	—	31 Dec 2017	13F
Laurion Capital Management LP	13F	Company	0.1%	51,831	$945,000	—	31 Dec 2017	13F

Institutional Holders of AtriCure, Inc. - Common Stock (ATRC) as of Q1 2018

As of 31 Mar 2018, AtriCure, Inc. - Common Stock (ATRC) was held by 108 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 30,696,727 shares. The largest 10 holders included FMR LLC, WELLINGTON MANAGEMENT GROUP LLP, BlackRock Inc., Hudson Executive Capital LP, VANGUARD GROUP INC, PRICE T ROWE ASSOCIATES INC /MD/, First Light Asset Management, LLC, PEREGRINE CAPITAL MANAGEMENT LLC, MILLENNIUM MANAGEMENT LLC, and LOOMIS SAYLES & CO L P. This page lists 108 institutional shareholders reporting positions in this security for the Q1 2018 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q1 2018 vs Q4 2017 Across Filers

Q4 2017 holders

109

Q1 2018 holders

108

Holder diff

-1

Investor	Q4 2017 Shares	Q1 2018 Shares	Share Diff	Share Chg %	Q4 2017 Value $	Q1 2018 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.