What does CUSIP 002121101 represent in this 13F holders report?

CUSIP 002121101 is the security identifier for ATEN - A10 Networks, Inc. - Common Stock used to aggregate holder disclosures.

How many institutions held ATEN - A10 Networks, Inc. - Common Stock in Q4 2020?

144 institutional investors reported ATEN - A10 Networks, Inc. - Common Stock for Q4 2020. Use the holders table for investor-level position and value details.

A10 Networks, Inc. - Common Stock (ATEN)

CUSIP: 002121101

Q4 2020 13F Holders as of 31 Dec 2020

Type / Class: Equity / Common Stock
Shares outstanding: 77,603,290
Total 13F shares: 62,784,683
Share change: +2,957,962
Total reported value: $618,930,554
Put/Call ratio: 39%
Price per share: $9.86
Number of holders: 144
Value change: +$35,638,570
Number of buys: 84
Number of sells: 63

Quarterly Holders Quick Answers

What is CUSIP 002121101?
CUSIP 002121101 identifies ATEN - A10 Networks, Inc. - Common Stock in SEC institutional holdings data.

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Explore More Reporting Periods

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Newer quarter: Q1 2021
Previous quarter: Q3 2020

Recent filing periods for CUSIP 002121101:

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

Top shareholders of ATEN - A10 Networks, 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
SUMMIT PARTNERS L P	13F	Company	12%	9,539,076	$60,764,000	—	30 Sep 2020	13F
VIEX Capital Advisors, LLC	13F	Company	9.9%	7,691,096	$48,992,000	—	30 Sep 2020	13F
BlackRock Finance, Inc.	13F	Company	7.1%	5,531,077	$35,235,000	—	30 Sep 2020	13F
VANGUARD GROUP INC	13F	Company	5.2%	4,025,309	$25,642,000	—	30 Sep 2020	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	4.7%	3,652,347	$23,265,000	—	30 Sep 2020	13F
Legal & General Group Plc	13F	Company	4.3%	3,347,854	$21,326,000	—	30 Sep 2020	13F
ETF MANAGERS GROUP, LLC	13F	Company	2.1%	1,595,830	$10,453,000	—	30 Sep 2020	13F
ROYCE & ASSOCIATES LP	13F	Company	2.1%	1,597,097	$10,174,000	—	30 Sep 2020	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	2%	1,554,798	$9,904,000	—	30 Sep 2020	13F
STATE STREET CORP	13F	Company	2%	1,553,769	$9,898,000	—	30 Sep 2020	13F
JACOBS LEVY EQUITY MANAGEMENT, INC	13F	Company	1.3%	993,014	$6,325,000	—	30 Sep 2020	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.2%	905,204	$5,765,000	—	30 Sep 2020	13F
FIRST TRUST ADVISORS LP	13F	Company	0.93%	725,351	$4,620,000	—	30 Sep 2020	13F
NORTHERN TRUST CORP	13F	Company	0.91%	703,536	$4,481,000	—	30 Sep 2020	13F
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	13F	Company	0.83%	640,740	$4,082,000	—	30 Sep 2020	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.76%	589,005	$3,752,000	—	30 Sep 2020	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.76%	587,493	$3,742,000	—	30 Sep 2020	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.76%	586,109	$3,734,000	—	30 Sep 2020	13F
TWO SIGMA ADVISERS, LP	13F	Company	0.65%	502,900	$3,203,000	—	30 Sep 2020	13F
Hillsdale Investment Management Inc.	13F	Company	0.62%	481,223	$3,065,000	—	30 Sep 2020	13F
Lynrock Lake LP	13F	Company	0.61%	471,232	$3,002,000	—	30 Sep 2020	13F
BNP PARIBAS FINANCIAL MARKETS	13F	Company	0.59%	459,840	$2,929,181	—	30 Sep 2020	13F
LOS ANGELES CAPITAL MANAGEMENT LLC	13F	Company	0.59%	457,877	$2,917,000	—	30 Sep 2020	13F
PRUDENTIAL FINANCIAL INC	13F	Company	0.58%	447,901	$2,853,000	—	30 Sep 2020	13F
Assenagon Asset Management S.A.	13F	Company	0.56%	435,680	$2,775,000	—	30 Sep 2020	13F
KENNEDY CAPITAL MANAGEMENT LLC	13F	Company	0.53%	414,474	$2,640,000	—	30 Sep 2020	13F
Divisar Capital Management LLC	13F	Company	0.49%	381,003	$2,427,000	—	30 Sep 2020	13F
Penserra Capital Management LLC	13F	Company	0.45%	350,955	$2,235,000	—	30 Sep 2020	13F
Nuveen Asset Management, LLC	13F	Company	0.44%	337,736	$2,152,000	—	30 Sep 2020	13F
JPMORGAN CHASE & CO	13F	Company	0.41%	320,646	$2,101,000	—	30 Sep 2020	13F
FULLER & THALER ASSET MANAGEMENT, INC.	13F	Company	0.39%	305,155	$1,944,000	—	30 Sep 2020	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.37%	288,866	$1,841,000	—	30 Sep 2020	13F
CITADEL ADVISORS LLC	13F	Company	0.37%	284,946	$1,815,000	—	30 Sep 2020	13F
MACKAY SHIELDS LLC	13F	Company	0.36%	278,600	$1,775,000	—	30 Sep 2020	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.34%	267,435	$1,703,000	—	30 Sep 2020	13F
Russell Investments Group, Ltd.	13F	Company	0.34%	263,855	$1,679,000	—	30 Sep 2020	13F
Bank of New York Mellon Corp	13F	Company	0.34%	261,588	$1,666,000	—	30 Sep 2020	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.31%	239,038	$1,522,000	—	30 Sep 2020	13F
Squarepoint Ops LLC	13F	Company	0.3%	229,446	$1,462,000	—	30 Sep 2020	13F
PARADIGM CAPITAL MANAGEMENT INC/NY	13F	Company	0.29%	227,600	$1,450,000	—	30 Sep 2020	13F
PANAGORA ASSET MANAGEMENT INC	13F	Company	0.28%	214,889	$1,368,000	—	30 Sep 2020	13F
Roumell Asset Management, LLC	13F	Company	0.25%	191,850	$1,222,000	—	30 Sep 2020	13F
Trexquant Investment LP	13F	Company	0.24%	190,091	$1,211,000	—	30 Sep 2020	13F
AQR CAPITAL MANAGEMENT LLC	13F	Company	0.23%	182,099	$1,160,000	—	30 Sep 2020	13F
MARTINGALE ASSET MANAGEMENT L P	13F	Company	0.23%	181,621	$1,158,000	—	30 Sep 2020	13F
Worth Venture Partners, LLC	13F	Company	0.22%	171,120	$1,090,000	—	30 Sep 2020	13F
PARAMETRIC PORTFOLIO ASSOCIATES LLC	13F	Company	0.22%	169,761	$1,081,000	—	30 Sep 2020	13F
Engineers Gate Manager LP	13F	Company	0.2%	157,258	$1,002,000	—	30 Sep 2020	13F
GLOBEFLEX CAPITAL L P	13F	Company	0.2%	153,381	$977,000	—	30 Sep 2020	13F
Deutsche Girozentrale DekaBank	13F	Individual	0.19%	151,250	$967,000	—	30 Sep 2020	13F

Institutional Holders of A10 Networks, Inc. - Common Stock (ATEN) as of Q4 2020

As of 31 Dec 2020, A10 Networks, Inc. - Common Stock (ATEN) was held by 144 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 62,784,683 shares. The largest 10 holders included SUMMIT PARTNERS L P, VIEX Capital Advisors, LLC, BlackRock Inc., VANGUARD GROUP INC, Legal & General Group Plc, RENAISSANCE TECHNOLOGIES LLC, ETF MANAGERS GROUP, LLC, ALLIANCEBERNSTEIN L.P., ROYCE & ASSOCIATES LP, and STATE STREET CORP. This page lists 144 institutional shareholders reporting positions in this security for the Q4 2020 filing period.

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

Compare Q4 2020 vs Q3 2020 Across Filers

Q3 2020 holders

141

Q4 2020 holders

144

Holder diff

Investor	Q3 2020 Shares	Q4 2020 Shares	Share Diff	Share Chg %	Q3 2020 Value $	Q4 2020 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.