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 2015?

101 institutional investors reported ATEN - A10 Networks, Inc. - Common Stock for Q4 2015. Use the holders table for investor-level position and value details.

A10 Networks, Inc. - Common Stock (ATEN)

CUSIP: 002121101

Q4 2015 13F Holders as of 31 Dec 2015

Type / Class: Equity / Common Stock
Shares outstanding: 77,603,290
Total 13F shares: 28,572,628
Share change: +1,253,561
Total reported value: $187,447,370
Put/Call ratio: 105%
Price per share: $6.56
Number of holders: 101
Value change: +$8,861,245
Number of buys: 61
Number of sells: 37

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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Newer quarter: Q1 2016
Previous quarter: Q3 2015

Recent filing periods for CUSIP 002121101:

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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%	9,427,846	$56,473,000	—	30 Sep 2015	13F
FRANKLIN RESOURCES INC	13F	Company	3.8%	2,922,518	$17,506,000	—	30 Sep 2015	13F
ROYCE & ASSOCIATES LP	13F	Company	2.2%	1,718,027	$10,291,000	—	30 Sep 2015	13F
VANGUARD GROUP INC	13F	Company	1.4%	1,073,140	$6,428,000	—	30 Sep 2015	13F
WESTERLY CAPITAL MANAGEMENT, LLC	13F	Company	1.3%	1,040,812	$6,234,000	—	30 Sep 2015	13F
BlackRock Fund Advisors	13F	Company	1.1%	885,739	$5,306,000	—	30 Sep 2015	13F
AMERIPRISE FINANCIAL INC	13F	Company	1.1%	877,351	$5,256,000	—	30 Sep 2015	13F
CAISSE DE DEPOT ET PLACEMENT DU QUEBEC	13F	Company	0.88%	680,000	$4,073,000	—	30 Sep 2015	13F
Alyeska Investment Group, L.P.	13F	Company	0.79%	609,527	$3,651,000	—	30 Sep 2015	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.72%	560,880	$3,360,000	—	30 Sep 2015	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.67%	521,700	$3,125,000	—	30 Sep 2015	13F
JPMORGAN CHASE & CO	13F	Company	0.63%	492,059	$2,947,000	—	30 Sep 2015	13F
MORGAN STANLEY	13F	Company	0.6%	469,438	$2,813,000	—	30 Sep 2015	13F
State of Tennessee, Department of Treasury	13F	Company	0.59%	458,512	$2,746,000	—	30 Sep 2015	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.59%	454,318	$2,722,000	—	30 Sep 2015	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	0.54%	417,355	$2,500,000	—	30 Sep 2015	13F
STATE STREET CORP	13F	Company	0.51%	395,116	$2,365,000	—	30 Sep 2015	13F
BTG Pactual Global Asset Management Ltd	13F	Company	0.47%	365,000	$2,186,000	—	30 Sep 2015	13F
NORTHERN TRUST CORP	13F	Company	0.46%	354,415	$2,123,000	—	30 Sep 2015	13F
Spark Investment Management LLC	13F	Company	0.42%	322,300	$1,930,000	—	30 Sep 2015	13F
CITADEL ADVISORS LLC	13F	Company	0.4%	306,536	$1,836,000	—	30 Sep 2015	13F
BOGLE INVESTMENT MANAGEMENT L P /DE/	13F	Company	0.38%	294,937	$1,766,000	—	30 Sep 2015	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.33%	253,300	$1,517,000	—	30 Sep 2015	13F
PUTNAM INVESTMENTS LLC	13F	Company	0.32%	246,993	$1,480,000	—	30 Sep 2015	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.28%	215,397	$1,290,000	—	30 Sep 2015	13F
D. E. Shaw & Co., Inc.	13F	Company	0.26%	199,701	$1,196,000	—	30 Sep 2015	13F
Lapides Asset Management, LLC	13F	Company	0.22%	172,800	$1,035,000	—	30 Sep 2015	13F
Bank of New York Mellon Corp	13F	Company	0.2%	156,715	$939,000	—	30 Sep 2015	13F
THRIVENT FINANCIAL FOR LUTHERANS	13F	Company	0.2%	156,250	$936,000	—	30 Sep 2015	13F
True Bearing Asset Management LP	13F	Company	0.2%	155,606	$932,000	—	30 Sep 2015	13F
A.R.T. Advisors, LLC	13F	Company	0.18%	137,277	$822,000	—	30 Sep 2015	13F
Nationwide Fund Advisors	13F	Company	0.17%	128,430	$769,000	—	30 Sep 2015	13F
BlackRock Investment Management, LLC	13F	Company	0.15%	115,589	$692,000	—	30 Sep 2015	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.15%	114,601	$686,000	—	30 Sep 2015	13F
WHV Investments, Inc.	13F	Company	0.12%	89,595	$643,000	—	30 Sep 2015	13F
HIGHBRIDGE CAPITAL MANAGEMENT LLC	13F	Company	0.14%	105,059	$630,000	—	30 Sep 2015	13F
STRS OHIO	13F	Company	0.13%	101,400	$607,000	—	30 Sep 2015	13F
TFS CAPITAL LLC	13F	Company	0.13%	99,728	$597,000	—	30 Sep 2015	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.12%	93,723	$562,000	—	30 Sep 2015	13F
Allianz Asset Management GmbH	13F	Company	0.11%	82,675	$495,000	—	30 Sep 2015	13F
TEACHERS ADVISORS, LLC	13F	Company	0.09%	70,036	$420,000	—	30 Sep 2015	13F
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F	Company	0.08%	61,730	$370,000	—	30 Sep 2015	13F
NORGES BANK	13F	Company	0.07%	50,500	$302,000	—	30 Sep 2015	13F
CROSSLINK CAPITAL INC	13F	Company	0.06%	49,644	$297,000	—	30 Sep 2015	13F
Nine Chapters Capital Management LLC	13F	Company	0.06%	47,400	$284,000	—	30 Sep 2015	13F
BOOTHBAY FUND MANAGEMENT, LLC	13F	Company	0.06%	46,420	$278,000	—	30 Sep 2015	13F
Engineers Gate Manager LP	13F	Company	0.05%	37,426	$224,000	—	30 Sep 2015	13F
PRIMECAP MANAGEMENT CO/CA/	13F	Company	0.05%	35,000	$210,000	—	30 Sep 2015	13F
PARADIGM CAPITAL MANAGEMENT INC/NY	13F	Company	0.04%	32,700	$196,000	—	30 Sep 2015	13F
SECOR Capital Advisors, LP	13F	Company	0.04%	32,129	$192,000	—	30 Sep 2015	13F

Institutional Holders of A10 Networks, Inc. - Common Stock (ATEN) as of Q4 2015

As of 31 Dec 2015, A10 Networks, Inc. - Common Stock (ATEN) was held by 101 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 28,572,628 shares. The largest 10 holders included SUMMIT PARTNERS L P, FRANKLIN RESOURCES INC, ROYCE & ASSOCIATES LLC, VANGUARD GROUP INC, RENAISSANCE TECHNOLOGIES LLC, BlackRock Fund Advisors, CAISSE DE DEPOT ET PLACEMENT DU QUEBEC, MILLENNIUM MANAGEMENT LLC, AMERIPRISE FINANCIAL INC, and BlackRock Institutional Trust Company, N.A.. This page lists 101 institutional shareholders reporting positions in this security for the Q4 2015 filing period.

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

Compare Q4 2015 vs Q3 2015 Across Filers

Q3 2015 holders

Q4 2015 holders

101

Holder diff

Investor	Q3 2015 Shares	Q4 2015 Shares	Share Diff	Share Chg %	Q3 2015 Value $	Q4 2015 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.