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A10 Networks, Inc.
$36.30 -1.70 (-4.47%) At close · Jul 2
Market Cap
$2.61B
Shares
71,998,175

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 265
Total Value: $1,601,327,542
Total Shares: 69,259,938
Showing 1–100 of 267 holdings by value · page 1 of 3

Institutional Ownership Trend

26 quarters

Superinvestors Holding ATEN

All superinvestors →
Mario Gabelli $988,380 Joel Greenblatt $459,671

Holder Concentration

Across 265 13F filers
Top Holder
18.9%
Jun 2023 → Mar 2026 · range 18.5% – 20.9%
of institutional value
Top 5
36.2%
Jun 2023 → Mar 2026 · range 36.2% – 50.5%
of institutional value
Top 10
49.4%
Jun 2023 → Mar 2026 · range 49.4% – 64.2%
of institutional value
HHI
519
Jun 2023 → Mar 2026 · range 519 – 710
Broadly held
Showing 100 of 267
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $302,600,956 18.90% 13,088,277
Mid Penserra Capital Management LLC $83,095,868 5.19% 3,594,112
Mega VANGUARD CAPITAL MANAGEMENT LLC $72,157,866 4.51% 3,121,015
Mega STATE STREET CORP $71,445,077 4.46% 3,090,185
Large Boston Trust Walden Corp $50,245,794 3.14% 2,173,261
Mega WELLINGTON MANAGEMENT GROUP LLP $47,962,691 3.00% 2,074,511
Mega BARCLAYS PLC $43,338,484 2.71% 1,874,502
Large RENAISSANCE TECHNOLOGIES LLC $41,268,899 2.58% 1,784,987
Mega FIRST TRUST ADVISORS LP $39,762,169 2.48% 1,719,817
Mega GEODE CAPITAL MANAGEMENT, LLC $39,706,426 2.48% 1,717,406
Mega DIMENSIONAL FUND ADVISORS LP $37,823,092 2.36% 1,635,947
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $35,978,788 2.25% 1,556,176
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $34,613,969 2.16% 1,497,144
Mid PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. $33,753,119 2.11% 1,459,910
Mega TWO SIGMA INVESTMENTS, LP $30,518,145 1.91% 1,319,989
Mega GOLDMAN SACHS GROUP INC $27,437,497 1.71% 1,186,743
Mega PRICE T ROWE ASSOCIATES INC /MD/ $24,804,013 1.55% 1,072,838
Large PRUDENTIAL FINANCIAL INC $20,465,985 1.28% 885,207
Mid ROYCE & ASSOCIATES LP $18,898,981 1.18% 817,430
Large Boston Partners $18,861,064 1.18% 815,790
Mega MORGAN STANLEY $18,798,566 1.17% 813,087
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $17,200,540 1.07% 743,968
Mega NORTHERN TRUST CORP Bank $16,285,817 1.02% 704,404
Mega Bank of New York Mellon Corp Bank $15,273,971 0.95% 660,639
Mega JANE STREET GROUP, LLC $13,778,317 0.86% 595,948
Mid DEPRINCE RACE & ZOLLO INC $13,058,176 0.82% 564,800
Mega ROYAL BANK OF CANADA Bank $12,402,976 0.77% 536,461
Mega CITADEL ADVISORS LLC $11,884,142 0.74% 514,020
Mid OBERWEIS ASSET MANAGEMENT INC/ $11,659,416 0.73% 504,300
Mega VANGUARD FIDUCIARY TRUST CO Bank $11,431,290 0.71% 494,433
Large Impax Asset Management Group plc $10,866,400 0.68% 470,000
Mid Aptus Capital Advisors, LLC $10,519,646 0.66% 455,002
Mega PRINCIPAL FINANCIAL GROUP INC $10,086,769 0.63% 436,279
Mid Defiance ETFs, LLC Mutual Fund $9,782,950 0.61% 423,138
Mega MILLENNIUM MANAGEMENT LLC $9,592,950 0.60% 414,920
Mid PARADIGM CAPITAL MANAGEMENT INC/NY $9,280,368 0.58% 401,400
Small Bridge City Capital, LLC $9,263,790 0.58% 400,683
Mega UBS Group AG $9,018,071 0.56% 390,055
Large Russell Investments Group, Ltd. $9,011,711 0.56% 389,780
Mega BNP PARIBAS ARBITRAGE, SA $9,010,141 0.56% 389,712
Mega Invesco Ltd. $8,384,974 0.52% 362,672
Large PEAK6 LLC $7,793,752 0.49% 337,100
Mid RICE HALL JAMES & ASSOCIATES, LLC $7,787,370 0.49% 336,824
Mega WELLS FARGO & COMPANY/MN $7,688,185 0.48% 332,534
Mega JPMORGAN CHASE & CO $7,552,053 0.47% 326,646
Mid CRAWFORD INVESTMENT COUNSEL INC $7,412,780 0.46% 320,622
Large HRT FINANCIAL LP $7,407,185 0.46% 320,380
Large Man Group plc $7,038,675 0.44% 304,441
Mid Jump Financial, LLC $6,646,028 0.42% 287,458
Mega D. E. Shaw & Co., Inc. $6,089,507 0.38% 263,387
Large Public Sector Pension Investment Board Pension $5,913,795 0.37% 255,787
Large TUDOR INVESTMENT CORP ET AL $5,522,373 0.34% 238,857
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $5,450,008 0.34% 235,727
Mega AMERICAN CENTURY COMPANIES INC $5,141,171 0.32% 222,369
Mid PEREGRINE CAPITAL MANAGEMENT LLC $5,077,591 0.32% 219,619
Mega BANK OF AMERICA CORP /DE/ Bank $4,778,210 0.30% 206,670
Small SUMMIT PARTNERS L P $4,625,502 0.29% 200,065
Mega RHUMBLINE ADVISERS $4,441,583 0.28% 192,110
Mega Legal & General Group Plc $4,407,040 0.28% 190,616
Mid HARBOR CAPITAL ADVISORS, INC. $4,326,445 0.27% 187,130
Mega HSBC HOLDINGS PLC $4,064,032 0.25% 175,780
Mid IQ EQ FUND MANAGEMENT (IRELAND) Ltd $4,050,485 0.25% 175,194
Large BESSEMER GROUP INC $3,958,675 0.25% 171,223
Large VOYA INVESTMENT MANAGEMENT LLC $3,848,970 0.24% 166,478
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $3,735,125 0.23% 161,554
Mega Nuveen, LLC $3,666,161 0.23% 158,571
Large Qube Research & Technologies Ltd $3,642,463 0.23% 157,546
Mega Swiss National Bank Bank $3,292,288 0.21% 142,400
Mid Banque Cantonale Vaudoise $3,224,592 0.20% 139,472
Mega VICTORY CAPITAL MANAGEMENT INC $3,175,578 0.20% 137,352
Large Connor, Clark & Lunn Investment Management Ltd. $3,152,319 0.20% 136,346
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension $2,996,513 0.19% 129,607
Mid Hillsdale Investment Management Inc. $2,951,522 0.18% 127,661
Large Creative Planning $2,942,436 0.18% 127,268
Mid Quantbot Technologies LP $2,879,249 0.18% 124,535
Mega AMERIPRISE FINANCIAL INC $2,856,221 0.18% 123,539
Large SEI INVESTMENTS CO $2,803,091 0.18% 121,241
Large TRUIST FINANCIAL CORP $2,659,146 0.17% 115,015
Mid Hennion & Walsh Asset Management, Inc. $2,637,899 0.16% 114,096
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $2,502,092 0.16% 108,222
Small Uniplan Investment Counsel, Inc. $2,456,915 0.15% 106,268
Large FEDERATED HERMES, INC. $2,456,892 0.15% 106,267
Mega FRANKLIN RESOURCES INC $2,404,454 0.15% 103,999
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $2,286,729 0.14% 98,907
Mid KAMES CAPITAL plc $2,284,256 0.14% 98,800
Mid PDT Partners, LLC $2,280,233 0.14% 98,626
Mid MARTINGALE ASSET MANAGEMENT L P $2,224,675 0.14% 96,223
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $2,114,347 0.13% 91,451
Large Universal- Beteiligungs- und Servicegesellschaft mbH $2,085,863 0.13% 90,219
Mega JANUS HENDERSON GROUP PLC $2,023,115 0.13% 87,505
Mega DEUTSCHE BANK AG\ Bank $1,861,735 0.12% 80,525
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $1,810,296 0.11% 78,300
Mega Fisher Asset Management, LLC $1,731,364 0.11% 74,886
Large Cresset Asset Management, LLC $1,684,384 0.11% 72,854
Mega ALLIANCEBERNSTEIN L.P. $1,677,540 0.10% 72,558
Large ExodusPoint Capital Management, LP $1,673,541 0.10% 72,385
Large KLP KAPITALFORVALTNING AS $1,606,840 0.10% 69,500
Mid Brooklyn Investment Group $1,594,100 0.10% 68,949
Large Allianz Asset Management GmbH $1,524,879 0.10% 65,955
Small GLOBEFLEX CAPITAL L P $1,509,805 0.09% 65,303
Key facts CIK 1580808 CUSIP 002121101 13F (30d) 3 filings 3 filers Visit website Investor relations

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