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A10 Networks, Inc. (ATEN) institutional ownership

Latest close $35.54 Jul 22, 2026
Market cap$2.6B 52-week range SectorTechnology
Funds holding · Q1 2026
258
reported ATEN position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Net bought $41M
149 buyers · 109 sellers

A10 Networks, Inc. (ATEN) price and institutional activity

Dates

Q1 2026

$170M bought by 149 investors
Prudential Financial Inc$16MJane Street Group, LLC$12M +147 more
$129M sold by 109 investors
First Trust Advisors LP-$15MPenserra Capital Management LLC-$13M +107 more
Bought Sold Totals per quarter; hover a bar for the names.

A10 Networks, Inc. (ATEN) institutional activity · 258

Investor Type Est. change Change Δ Own Date
Prudential Financial Inc · Added +$16M
Change +812K Date Q1 2026
Prudential Financial Inc Added· Q1 2026 +$16M +812K Q1 2026
First Trust Advisors LP · Reduced −$15M
Change −744K Date Q1 2026
First Trust Advisors LP Reduced· Q1 2026 −$15M −744K Q1 2026
Penserra Capital Management LLC · Reduced −$13M
Change −666K Date Q1 2026
Penserra Capital Management LLC Reduced· Q1 2026 −$13M −666K Q1 2026
Jane Street Group, LLC · New +$12M
Change +596K Date Q1 2026
Jane Street Group, LLC New· Q1 2026 +$12M +596K Q1 2026
Two Sigma Investments, LP · Added +$11M
Change +586K Δ Own +79.9% Date Q1 2026
Two Sigma Investments, LP Added· Q1 2026 +$11M +586K +79.9% Q1 2026
Deprince Race & Zollo Inc · New +$11M
Change +565K Date Q1 2026
Deprince Race & Zollo Inc New· Q1 2026 +$11M +565K Q1 2026
Royal Bank of Canada · Added +$10M
Change +531K Date Q1 2026
Royal Bank of Canada Added· Q1 2026 +$10M +531K Q1 2026
Oberweis Asset Management Inc/ · New +$9.9M
Change +504K Date Q1 2026
Oberweis Asset Management Inc/ New· Q1 2026 +$9.9M +504K Q1 2026
Two Sigma Advisers, LP · Exited −$9.3M
Change −474K Δ Own −100.0% Date Q1 2026
Two Sigma Advisers, LP Exited· Q1 2026 −$9.3M −474K −100.0% Q1 2026
Invesco Ltd. · Reduced −$9.3M
Change −474K Δ Own −56.6% Date Q1 2026
Invesco Ltd. Reduced· Q1 2026 −$9.3M −474K −56.6% Q1 2026
Qube Research & Technologies Ltd · Reduced −$9.1M
Change −465K Date Q1 2026
Qube Research & Technologies Ltd Reduced· Q1 2026 −$9.1M −465K Q1 2026
T. Rowe Price Associates · Reduced −$9.1M
Change −464K Date Q1 2026
T. Rowe Price Associates Reduced· Q1 2026 −$9.1M −464K Q1 2026
Arrowstreet Capital, Limited Partnership · Added +$7.9M
Change +402K Date Q1 2026
Arrowstreet Capital, Limited Partnership Added· Q1 2026 +$7.9M +402K Q1 2026
Citadel Advisors LLC Added· Q1 2026 +$7.1M +362K +238.1% Q1 2026
Russell Investments Group, Ltd. · Added +$7.0M
Change +356K Date Q1 2026
Russell Investments Group, Ltd. Added· Q1 2026 +$7.0M +356K Q1 2026
Data through Q1 2026 · filed Jun 2, 2026
15 of 258

Famous investor activity in A10 Networks, Inc. (ATEN)

A10 Networks, Inc. (ATEN) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Weber Robert Scott · Officer Tax withholding or exercise payment (F) -$69K
Price $36.30 Qty -2K Owned 65K ΔOwn −2.8% Trade date Jul 6, 2026 Filed date Jul 6, 2026
Weber Robert Scott Officer Tax withholding or exercise payment (F) $36.30 -2K -$69K 65K −2.8% Jul 6, 2026 Jul 6, 2026
Caron Michelle Elizabeth · CFO Tax withholding or exercise payment (F) -$20K
Price $27.00 Qty -748 Owned 36K Trade date May 15, 2026 Filed date May 15, 2026
Caron Michelle Elizabeth CFO Tax withholding or exercise payment (F) $27.00 -748 -$20K 36K May 15, 2026 May 15, 2026
Trivedi Dhrupad · Director Tax withholding or exercise payment (F) -$887K
Price $27.00 Qty -33K Owned 888K Trade date May 15, 2026 Filed date May 15, 2026
Trivedi Dhrupad Director Tax withholding or exercise payment (F) $27.00 -33K -$887K 888K May 15, 2026 May 15, 2026
Weber Robert Scott · Officer Tax withholding or exercise payment (F) -$52K
Price $27.00 Qty -2K Owned 66K Trade date May 15, 2026 Filed date May 15, 2026
Weber Robert Scott Officer Tax withholding or exercise payment (F) $27.00 -2K -$52K 66K May 15, 2026 May 15, 2026
Caron Michelle Elizabeth · CFO 2 operations 0
Owned 0 Trade date May 14, 2026 Filed date May 15, 2026
Caron Michelle Elizabeth CFO 2 operations 0 0 May 14, 2026 May 15, 2026
Trivedi Dhrupad · Director 4 operations 0
Owned 0 Trade date May 14, 2026 Filed date May 15, 2026
Trivedi Dhrupad Director 4 operations 0 0 May 14, 2026 May 15, 2026
Weber Robert Scott · Officer 4 operations 0
Owned 0 Trade date May 14, 2026 Filed date May 15, 2026
Weber Robert Scott Officer 4 operations 0 0 May 14, 2026 May 15, 2026
Trivedi Dhrupad · Director Tax withholding or exercise payment (F) -$891K
Price $27.13 Qty -33K Owned 792K Trade date May 6, 2026 Filed date May 6, 2026
Trivedi Dhrupad Director Tax withholding or exercise payment (F) $27.13 -33K -$891K 792K May 6, 2026 May 6, 2026
Weber Robert Scott · Officer Tax withholding or exercise payment (F) -$52K
Price $27.13 Qty -2K Owned 60K Trade date May 6, 2026 Filed date May 6, 2026
Weber Robert Scott Officer Tax withholding or exercise payment (F) $27.13 -2K -$52K 60K May 6, 2026 May 6, 2026
Caron Michelle Elizabeth · CFO Tax withholding or exercise payment (F) -$81K
Price $27.13 Qty -3K Owned 33K Trade date May 6, 2026 Filed date May 6, 2026
Caron Michelle Elizabeth CFO Tax withholding or exercise payment (F) $27.13 -3K -$81K 33K May 6, 2026 May 6, 2026
Singer Eric · Director Sell −$672K
Price $27.21 Qty −25K Owned 69K Trade date May 5, 2026 Filed date May 6, 2026
Singer Eric Director Sell $27.21 −25K −$672K 69K May 5, 2026 May 6, 2026
Trivedi Dhrupad · Director 4 operations 0
Owned 66K Trade date May 5, 2026 Filed date May 6, 2026
Trivedi Dhrupad Director 4 operations 0 66K May 5, 2026 May 6, 2026
Weber Robert Scott · Officer 4 operations 0
Owned 4K Trade date May 5, 2026 Filed date May 6, 2026
Weber Robert Scott Officer 4 operations 0 4K May 5, 2026 May 6, 2026
Caron Michelle Elizabeth · CFO 4 operations 0
Owned 3K Trade date May 5, 2026 Filed date May 6, 2026
Caron Michelle Elizabeth CFO 4 operations 0 3K May 5, 2026 May 6, 2026
Chung Peter Y. · Director Grant (A) 7K
Owned 207K Trade date Apr 22, 2026 Filed date Apr 24, 2026
Chung Peter Y. Director Grant (A) 7K 207K Apr 22, 2026 Apr 24, 2026
15 of 42
15 of 42 Sign in to continue to older insider transactions.

A10 Networks, Inc. (ATEN) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
BlackRock Inc. 13.2M
% of shares outstanding 17.8% Filing date Jan 19, 2024
BlackRock Inc. 13.2M 17.8% Jan 19, 2024
Vanguard Group Inc 7.1M
% of shares outstanding 9.5% Filing date Feb 13, 2024
Vanguard Group Inc 7.1M 9.5% Feb 13, 2024
Vanguard Capital Management LLC 3.7M
% of shares outstanding 5.1% Filing date Apr 29, 2026
Vanguard Capital Management LLC 3.7M 5.1% Apr 29, 2026
Renaissance Technologies LLC 3.0M
% of shares outstanding 3.8% Filing date Feb 10, 2022
Renaissance Technologies LLC 3.0M 3.8% Feb 10, 2022
Legal & General Investment Management Ltd 2.4M
% of shares outstanding 3.1% Filing date Feb 14, 2022
Legal & General Investment Management Ltd 2.4M 3.1% Feb 14, 2022
First Trust Portfolios LP 2.0M
% of shares outstanding 2.8% Filing date Jul 8, 2024
First Trust Portfolios LP 2.0M 2.8% Jul 8, 2024
Viex Capital Advisors, LLC 1.7M
% of shares outstanding 2.3% Filing date Nov 3, 2021
Viex Capital Advisors, LLC 1.7M 2.3% Nov 3, 2021
Summit Partners L P 606K
% of shares outstanding 0.0% Filing date Nov 8, 2024
Summit Partners L P 606K 0.0% Nov 8, 2024
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A10 Networks, Inc. (ATEN) ownership FAQ

Who owns ATEN?

258 reporting institutions disclosed ATEN position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.