[SCHEDULE 13G/A] A10 NETWORKS INC SEC Filing

Rhea-AI Filing Summary

Legal & General Group Plc and its investment management subsidiaries have filed Amendment No. 1 to Schedule 13G reporting their aggregate ownership of A10 Networks (ATEN) common stock. As of the event date 12/31/2021, the group beneficially owns 2,405,702 shares, representing 3.1 % of ATEN’s outstanding shares. All voting and dispositive authority is held on a shared basis; no entity reports sole voting or dispositive power.

Break-down by entity:

• Legal & General Investment Management Ltd – 2,388,253 shares (3.1 %)
• LGIM Managers (Europe) Ltd – 2,386,395 shares (3.08 %)
• Legal & General UCITS ETF Plc – 2,386,395 shares (3.1 %)
• Legal & General Investment Management America Inc – 17,449 shares (0.02 %)

The filing classifies each reporting person as a foreign financial institution (FI). Because the combined stake is below the 5 % threshold, the group affirms “Ownership of 5 Percent or Less of a Class.”

Mary Ann Colledge, Head of Conduct Advisory, signed on behalf of each entity on 07/02/2025, certifying the accuracy of the information. No indication of recent purchases, sales, or intent to influence management is provided, suggesting the disclosure is a routine regulatory update rather than a strategic move.

Insights

Securities Analyst

TL;DR: Routine 13G shows Legal & General owns 3.1 % of ATEN—small, passive, little market impact.

The filing confirms Legal & General’s passive stake at just over 3 %. That level is typical for an indexed or quantitative strategy and does not confer meaningful influence. No change in control, activism signals, or transaction data are disclosed. For investors, the main takeaway is the continued presence of a reputable institutional holder, which marginally supports liquidity and float stability but is not thesis-altering.

Corporate Governance Expert

TL;DR: Foreign institutional group flags sub-5 % holding; governance implications minimal.

The Schedule 13G categorizes all entities as foreign FIs with shared dispositive power, indicating collective, not individual, decision-making. Because the stake remains under 5 %, Legal & General does not trigger heightened disclosure or potential influence rights. There is no evidence of coordination beyond normal group reporting. Governance impact on A10 Networks is therefore negligible at this time.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

A10 NETWORKS, INC.

(Name of Issuer)

Common stock, $0.00001 par value per share

(Title of Class of Securities)

002121101

(CUSIP Number)

12/31/2021

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 002121101

1

Names of Reporting Persons

Legal & General Group Plc

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED KINGDOM

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,388,253.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,405,702.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,405,702.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.1 %

12

Type of Reporting Person (See Instructions)

FI

SCHEDULE 13G

CUSIP No. 002121101

1

Names of Reporting Persons

Legal & General Investment Management Ltd

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED KINGDOM

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,388,253.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,388,253.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,388,253.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.1 %

12

Type of Reporting Person (See Instructions)

FI

SCHEDULE 13G

CUSIP No. 002121101

1

Names of Reporting Persons

LGIM Managers (Europe) Limited

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

IRELAND

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,386,395.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,386,395.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,386,395.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.08 %

12

Type of Reporting Person (See Instructions)

FI

SCHEDULE 13G

CUSIP No. 002121101

1

Names of Reporting Persons

Legal & General UCITS ETF Plc

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

IRELAND

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,386,395.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,386,395.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,386,395.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.1 %

12

Type of Reporting Person (See Instructions)

FI

SCHEDULE 13G

CUSIP No. 002121101

1

Names of Reporting Persons

Legal & General Investment Management America Inc

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

ILLINOIS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 17,449.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

17,449.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.02 %

12

Type of Reporting Person (See Instructions)

IA, CO, OO

Comment for Type of Reporting Person: CFTC registered Commodity Trading Advisor and Commodity Pool Operator, OSC and AMF registered portfolio in Canada

SCHEDULE 13G

Item 1.
(a)	Name of issuer: A10 NETWORKS, INC.
(b)	Address of issuer's principal executive offices: 2300 ORCHARD PKWY, SAN JOSE, CA, 95131
Item 2.
(a)	Name of person filing: Legal & General Group Plc
(b)	Address or principal business office or, if none, residence: ONE COLEMAN STREET, LONDON, EC2R 5AA
(c)	Citizenship: United Kingdom
(d)	Title of class of securities: Common stock, $0.00001 par value per share
(e)	CUSIP No.: 002121101
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 2405702
(b)	Percent of class: 3.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 2388253
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 2388253
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. 8 (a).LEGAL & GENERAL INVESTMENT MANAGEMENT LIMITED IS A DISCRETIONARY INVESTMENT MANAGER AUTHORISED AND REGULATED BY THE UK FINANCIAL CONDUCT AUTHORITY. LEGAL & GENERAL UCITS ETF PLC IS ORGANISED AS AN OPEN-ENDED INVESTMENT COMPANY WITH VARIABLE CAPITAL. THE COMPANY IS STRUCTURED AS AN UMBRELLA FUND AND IS COMPRISED OF SEPARATE SUB-FUNDS. THE COMPANY HAS SEGREGATED LIABILITY BETWEEN ITS FUNDS AND IS ORGANISED UNDER THE LAWS OF IRELAND AS A PUBLIC LIMITED COMPANY PURSUANT TO THE COMPANIES ACT (2014) (AS AMENDED)(THE """"""""COMPANIES ACT""""""""). THE COMPANY HAS ENTERED INTO A MANAGEMENT AGREEMENT WITH LGIM MANAGERS (EUROPE) LIMITED UNDER WHICH THE MANAGER IS RESPONSIBLE FOR THE MANAGEMENT OF THE COMPANYS AFFAIRS. LGIM MANAGERS (EUROPE) LIMITED IS A LIMITED LIABILITY COMPANY INCORPORATED IN IRELAND AND AUTHORISED BY THE CENTRAL BANK OF IRELAND AS A SUPER MANCO. THE MANAGER HAS APPOINTED LEGAL & GENERAL INVESTMENT MANAGEMENT LIMITED AS INVESTMENT MANAGER FOR EACH OF THE FUNDS. THE INVESTMENT MANAGER IS AUTHORISED AND REGULATED BY THE UK FINANCIAL CONDUCT AUTHORITY. LEGAL & GENERAL INVESTMENT MANAGEMENT AMERICA INC. IS AN INVESTMENT MANAGER REGULATED BY THE SECURITIES AND EXCHANGE COMMISSION. LEGAL & GENERAL GROUP PLC IS AN INSURANCE COMPANY AND MULTINATIONAL FINANCIAL SERVICES GROUP COMPANY. Name of Persons Filing: THIS STATEMENT IS FILED BY: (i) Legal & General Group Plc (ii) Legal & General Investment Management Ltd (iii) LGIM Managers (Europe) Limited (iv) Legal & General UCITS ETF Plc (v) Legal & General Investment Management America Inc 8 (b). Address of Principal Business Office or, if none, Residence: THE ADDRESS OF PRINCIPAL BUSINESS OFFICE IS: (i) ONE COLEMAN STREET, LONDON, EC2R 5AA (ii) ONE COLEMAN STREET, LONDON, EC2R 5AA (iii) 70 SIR JOHN ROGERSONS QUAY, DUBLIN 2, IRELAND (iv) 70 SIR JOHN ROGERSONS QUAY, DUBLIN 2, IRELAND (v) 71 SOUTH WACKER DRIVE, SUITE 800, CHICAGO IL 60606
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to the financial institutions in the group is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Legal & General Group Plc

Signature:	Mary Ann Colledge
Name/Title:	Head of Conduct Advisory
Date:	07/02/2025

Legal & General Investment Management Ltd

Signature:	Mary Ann Colledge
Name/Title:	Head of Conduct Advisory
Date:	07/02/2025

LGIM Managers (Europe) Limited

Signature:	Mary Ann Colledge
Name/Title:	Head of Conduct Advisory
Date:	07/02/2025

Legal & General UCITS ETF Plc

Signature:	Mary Ann Colledge
Name/Title:	Head of Conduct Advisory
Date:	07/02/2025

Legal & General Investment Management America Inc

Signature:	Mary Ann Colledge
Name/Title:	Head of Conduct Advisory
Date:	07/02/2025

Comments accompanying signature: After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

FAQ

How many A10 Networks (ATEN) shares does Legal & General currently own?

2,405,702 shares are reported as beneficially owned across the Legal & General group.

What percentage of ATEN’s outstanding stock does this represent?

The filing states a 3.1 % ownership position.

Does Legal & General have sole voting power over its ATEN shares?

No. The group reports 0 shares with sole voting power; all voting authority is shared.

Is this a passive investment or an activist position?

Filed on Schedule 13G as opposed to 13D, the disclosure indicates a passive investment with no activist intent disclosed.

Which subsidiaries hold the bulk of the ATEN shares?

Legal & General Investment Management Ltd and LGIM Managers (Europe) Ltd each control roughly 2.39 million shares (about 3 %).

Why is the filing date 2025 but the event date 2021?

Institutional investors often file annual 13G updates covering holdings as of the prior year-end; signature occurs when the report is finalized—in this case, 07/02/2025.