ATEN A10 Networks, Inc.

NYSE
$24.74

A10 Networks, Inc. (ATEN) Institutional Ownership

What the institutions did with ATEN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.

Managers compared
334
filed both this quarter and last
Managers holding
307
+48 on the quarter
Buyers
166
75 opened new
Sellers
128
27 sold out entirely
Buyer share
56.5%
of managers who traded it
Breadth
+12.9
net buyers, as a share of those trading

Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Ownership map

Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
BlackRock, Inc. 13.6M 17.7%
VANGUARD PORTFOLIO MANAGEMENT LLC 3.5M 4.5%
FIRST TRUST ADVISORS LP 3.2M 4.2%
STATE STREET CORP 3.1M 4.0%
VANGUARD CAPITAL MANAGEMENT LLC 3.1M 4.0%
Penserra Capital Management LLC 3.1M 4.0%
Boston Trust Walden Corp 2.4M 3.2%
WELLINGTON MANAGEMENT GROUP LLP 2.0M 2.6%
GEODE CAPITAL MANAGEMENT, LLC 1.8M 2.4%
GOLDMAN SACHS GROUP INC 1.8M 2.3%
DIMENSIONAL FUND ADVISORS LP 1.6M 2.1%
RENAISSANCE TECHNOLOGIES LLC 1.5M 2.0%
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 1.4M 1.9%
FMR LLC 1.4M 1.9%
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 1.4M 1.9%
Invesco Ltd. 1.2M 1.6%
PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. 1.2M 1.6%
TWO SIGMA INVESTMENTS, LP 1.1M 1.5%
PRUDENTIAL FINANCIAL INC 1.0M 1.4%
BARCLAYS PLC 962.4K 1.3%
MORGAN STANLEY 908.1K 1.2%
NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 896.5K 1.2%
PRICE T ROWE ASSOCIATES INC /MD/ 894.4K 1.2%
LOOMIS SAYLES & CO L P 884.0K 1.2%
Boston Partners 802.5K 1.0%

Largest changes

Manager Action Previous Current Change
FIRST TRUST ADVISORS LP Increased 1.7M 3.2M +1.5M
FMR LLC Increased 28.1K 1.4M +1.4M
BARCLAYS PLC Reduced 1.9M 962.4K -912.1K
NOMURA ASSET MANAGEMENT INTERNATIONAL INC. New 0 896.5K +896.5K
LOOMIS SAYLES & CO L P New 0 884.0K +884.0K
Invesco Ltd. Increased 362.7K 1.2M +880.4K
GOLDMAN SACHS GROUP INC Increased 1.2M 1.8M +598.2K
DEPRINCE RACE & ZOLLO INC Sold Out 564.8K 0 -564.8K
Penserra Capital Management LLC Reduced 3.6M 3.1M -526.1K
JANE STREET GROUP, LLC Reduced 595.9K 93.9K -502.1K
BlackRock, Inc. Increased 13.1M 13.6M +480.2K
ACADIAN ASSET MANAGEMENT LLC New 0 455.8K +455.8K
CITADEL ADVISORS LLC Reduced 514.0K 93.2K -420.8K
WASATCH ADVISORS LP New 0 416.1K +416.1K
Ceredex Value Advisors LLC New 0 387.8K +387.8K
UBS Group AG Increased 390.1K 736.6K +346.5K
HRT FINANCIAL LP Sold Out 320.4K 0 -320.4K
Man Group plc Sold Out 304.4K 0 -304.4K
D. E. Shaw & Co., Inc. Increased 263.4K 547.6K +284.2K
PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. Reduced 1.5M 1.2M -271.2K
RENAISSANCE TECHNOLOGIES LLC Reduced 1.8M 1.5M -264.7K
Russell Investments Group, Ltd. Reduced 389.8K 135.0K -254.8K
BANK OF AMERICA CORP /DE/ Increased 206.7K 461.4K +254.7K
ENVESTNET ASSET MANAGEMENT INC New 0 247.9K +247.9K
Boston Trust Walden Corp Increased 2.2M 2.4M +243.5K
MILLENNIUM MANAGEMENT LLC Reduced 414.9K 175.6K -239.3K
Portolan Capital Management, LLC New 0 226.9K +226.9K
ROYCE & ASSOCIATES LP Reduced 817.4K 597.6K -219.8K
TWO SIGMA INVESTMENTS, LP Reduced 1.3M 1.1M -195.0K
Informed Momentum Co LLC New 0 188.8K +188.8K
BNP PARIBAS FINANCIAL MARKETS Increased 389.7K 573.2K +183.5K
PRICE T ROWE ASSOCIATES INC /MD/ Reduced 1.1M 894.4K -178.4K
PRUDENTIAL FINANCIAL INC Increased 885.2K 1.0M +163.1K
NEW YORK STATE COMMON RETIREMENT FUND Reduced 235.7K 81.2K -154.5K
Qube Research & Technologies Ltd Reduced 157.5K 12.1K -145.4K
Banque Cantonale Vaudoise Sold Out 139.5K 0 -139.5K
CREDIT AGRICOLE S A New 0 138.0K +138.0K
4D Advisors, LLC New 0 135.0K +135.0K
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Reduced 1.6M 1.4M -129.6K
Hillsdale Investment Management Inc. Sold Out 127.7K 0 -127.7K
Quantbot Technologies LP Sold Out 124.5K 0 -124.5K
TUDOR INVESTMENT CORP ET AL Reduced 238.9K 120.3K -118.6K
WELLINGTON MANAGEMENT GROUP LLP Reduced 2.1M 2.0M -114.7K
Bridge City Capital, LLC Reduced 400.7K 296.2K -104.4K
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Sold Out 98.9K 0 -98.9K
GEODE CAPITAL MANAGEMENT, LLC Increased 1.7M 1.8M +96.2K
MORGAN STANLEY Increased 813.1K 908.1K +95.0K
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced 108.2K 13.7K -94.5K
RICE HALL JAMES & ASSOCIATES, LLC Reduced 336.8K 245.1K -91.7K
CITIGROUP INC Increased 45.7K 128.4K +82.6K
HSBC HOLDINGS PLC Reduced 175.8K 94.4K -81.3K
Nuveen, LLC Increased 158.6K 236.6K +78.0K
Brevan Howard Capital Management LP Increased 24.9K 102.1K +77.2K
OSAIC HOLDINGS, INC. Increased 4.3K 80.0K +75.7K
VANGUARD PORTFOLIO MANAGEMENT LLC Increased 3.4M 3.5M +74.2K
ROYAL BANK OF CANADA Reduced 536.5K 463.0K -73.5K
Vest Financial, LLC New 0 66.7K +66.7K
MARTINGALE ASSET MANAGEMENT L P Reduced 96.2K 33.7K -62.5K
Numerai GP LLC New 0 62.0K +62.0K
Impax Asset Management Group plc Reduced 470.0K 410.0K -60.0K

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.