A10 NetworksATEN

13F holders, Q1 2026 (March 31)
264holders +22
53new positions
29sold out
9famous investors
$23.12avg. 13F price*

At the end of Q1 2026, 264 institutions reported holding A10 Networks Inc. (ATEN) in their 13F filings, up 22 from Q4 2025. 53 opened new positions and 29 sold out. The largest holders were BlackRock, Inc. ($302.6M), Penserra Capital Management LLC ($83.1M) and Vanguard Portfolio Management LLC ($78.3M). 9 famous investors held it, including Jim Simons / Peter Brown (0.1% of Renaissance Technologies's portfolio), Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio) and Mario Gabelli (0.0% of GAMCO Investors's portfolio).

Company
A10 Networks Inc.
CUSIP
002121101
Latest filing quarter
Q2 2026

History

Number of 13F holders

0100200300400 Q1 2024: 181Q1 2024Q2 2024: 218Q2 2024Q3 2024: 207Q3 2024Q4 2024: 219Q4 2024Q1 2025: 252Q1 2025Q2 2025: 229Q2 2025Q3 2025: 236Q3 2025Q4 2025: 242Q4 2025Q1 2026: 264Q1 2026Q2 2026: 310Q2 2026

Total Exit/New Position Q4 2025 → Q1 2026

InstitutionsTotal Value
New Positions53$77.5M
Exits29$17.4M

All 13F filers, Q4 2025 → Q1 2026: 8,745,606 shares bought and 5,775,628 shares sold, net +2,969,978 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.

Ownership 264 holders

BlackRock, Inc. 0.01% Add +0.8% 13,088,277 $302.6M
Penserra Capital Management LLC 0.98% Reduce -15.6% 3,594,112 $83.1M
Vanguard Portfolio Management LLC 0.00% — 3,387,848 $78.3M
Vanguard Capital Management LLC 0.00% — 3,121,015 $72.2M
State Street Corp. 0.00% Reduce -0.8% 3,090,185 $71.4M
Boston Trust Walden Corp 0.41% Reduce -11.0% 2,173,261 $50.2M
Wellington Management Group LLP 0.01% Add +2.7% 2,074,511 $48.0M
Barclays PLC 0.02% Add +1.8% 1,874,502 $43.3M
Renaissance Technologies 0.06% Reduce -16.4% 1,784,987 $41.3M
First Trust Advisors LP 0.03% Reduce -30.2% 1,719,817 $39.8M
Geode Capital Management, LLC 0.00% Reduce -3.4% 1,717,406 $39.7M
Dimensional Fund Advisors LP 0.01% Reduce -0.8% 1,635,947 $37.8M
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.05% Add +7.4% 1,556,176 $36.0M
Arrowstreet Capital, Limited Partnership 0.02% Add +36.7% 1,497,144 $34.6M
Punch & Associates Investment Management, Inc. 1.97% Add +1.7% 1,459,910 $33.8M
Two Sigma Investments, LP 0.03% Add +79.9% 1,319,989 $30.5M
Goldman Sachs Group Inc. 0.00% Add +14.7% 1,186,743 $27.4M
T. Rowe Price Associates Inc. 0.00% Reduce -30.2% 1,072,838 $24.8M
Prudential Financial Inc. 0.03% Add +1105.9% 885,207 $20.5M
Boston Partners 0.02% Reduce -2.9% 815,790 $19.0M
Royce & Associates LP 0.19% Add +12.4% 817,430 $18.9M
Morgan Stanley 0.00% Add +1.1% 813,087 $18.8M
Charles Schwab Investment Management Inc. 0.00% Add +2.1% 743,968 $17.2M
Northern Trust Corp. 0.00% Add +2.4% 704,404 $16.3M
Bank of New York Mellon Corp 0.00% Reduce -0.8% 660,639 $15.3M
Jane Street Group, LLC 0.01% New 595,948 $13.8M
Deprince Race & Zollo Inc. 0.25% New 564,800 $13.1M
Royal Bank of Canada 0.00% Add +9899.3% 536,461 $12.4M
Citadel Advisors 0.01% Add +238.1% 514,020 $11.9M
Oberweis Asset Management Inc./ 0.34% New 504,300 $11.7M
Vanguard Fiduciary Trust Co. 0.00% — 494,433 $11.4M
Impax Asset Management Group plc 0.08% Add +30.6% 470,000 $10.9M
Aptus Capital Advisors, LLC 0.09% Add +1.0% 455,002 $10.5M
Principal Financial Group Inc. 0.01% Reduce -3.5% 436,279 $10.1M
Defiance ETFs, LLC 0.14% Reduce -24.5% 423,138 $9.8M
Millennium Management 0.01% Add +95.7% 414,920 $9.6M
Paradigm Capital Management Inc. 0.35% No change 401,400 $9.3M
Bridge City Capital, LLC 2.57% Add +5.6% 400,683 $9.3M
UBS Group AG 0.00% Reduce -9.3% 390,055 $9.0M
Russell Investments Group, Ltd. 0.01% Add +1064.4% 389,780 $9.0M
BNP Paribas Financial Markets 0.01% Add +84.9% 389,712 $9.0M
Invesco Ltd. 0.00% Reduce -56.6% 362,672 $8.4M
Rice Hall James & Associates, LLC 0.43% Add +6.4% 336,824 $7.8M
Wells Fargo & Company 0.00% Add +29.8% 332,534 $7.7M
Crawford Investment Counsel Inc. 0.13% Add +5.8% 320,622 $7.4M
HRT Financial LP 0.02% New 320,380 $7.4M
JPMorgan Chase & Co. 0.00% Add +50.5% 326,646 $7.3M
Man Group plc 0.01% Add +60.0% 304,441 $7.0M
Jump Financial, LLC 0.11% New 287,458 $6.6M
D. E. Shaw & Co. 0.01% New 263,387 $6.1M
Public Sector Pension Investment Board 0.02% Add +3.0% 255,787 $5.9M
Tudor Investment Corporation 0.03% Reduce -35.5% 238,857 $5.5M
New York State Common Retirement Fund 0.01% Add +140.9% 235,727 $5.5M
American Century Companies Inc. 0.00% Reduce -3.1% 222,369 $5.1M
Peregrine Capital Management LLC 0.19% Reduce -8.8% 219,619 $5.1M
Bank of America Corp. 0.00% Add +24.9% 206,670 $4.8M
Summit Partners L P 0.69% Add +6.8% 200,065 $4.6M
Rhumbline Advisers 0.00% Add +2.8% 192,110 $4.4M
Legal & General Group Plc 0.00% Reduce -8.4% 190,616 $4.4M
Harbor Capital Advisors, Inc. 0.35% Reduce -14.0% 187,130 $4.3M
IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.31% Reduce -0.2% 175,194 $4.1M
HSBC Holdings PLC 0.00% Add +14.3% 175,780 $4.0M
Bessemer Group Inc. 0.01% No change 171,223 $4.0M
Voya Investment Management LLC 0.00% Reduce -23.3% 166,478 $3.8M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% Add +17.8% 161,554 $3.7M
Nuveen, LLC 0.00% Reduce -1.6% 158,571 $3.7M
Qube Research & Technologies Ltd 0.01% Reduce -74.7% 157,546 $3.6M
Swiss National Bank 0.00% No change 142,400 $3.3M
Banque Cantonale Vaudoise 0.12% Reduce -3.5% 139,472 $3.2M
Victory Capital Management Inc. 0.00% Reduce -17.3% 137,352 $3.2M
Connor, Clark & Lunn Investment Management Ltd. 0.01% Reduce -40.6% 136,346 $3.2M
State Board of Administration of Florida Retirement System 0.01% Reduce -0.9% 129,607 $3.0M
Hillsdale Investment Management Inc. 0.08% Reduce -4.3% 127,661 $3.0M
Creative Planning 0.00% Add +84.6% 127,268 $2.9M
Quantbot Technologies LP 0.12% Add +290.3% 124,535 $2.9M
Ameriprise Financial Inc. 0.00% Reduce -6.5% 123,539 $2.9M
Sei Investments Co. 0.00% Reduce -1.7% 121,241 $2.8M
Truist Financial Corp. 0.00% Add +0.0% 115,015 $2.7M
Hennion & Walsh Asset Management, Inc. 0.09% Add +10.9% 114,096 $2.6M
Susquehanna International Group, LLP 0.00% Add +116.4% 108,222 $2.5M
Uniplan Investment Counsel, Inc. 0.26% New 106,268 $2.5M
Federated Hermes, Inc. 0.00% Reduce -0.1% 106,267 $2.5M
Franklin Resources Inc. 0.00% Add +1.6% 103,999 $2.4M
Healthcare of Ontario Pension Plan Trust Fund 0.00% Add +53.7% 98,907 $2.3M
AEGON ASSET MANAGEMENT UK Plc 0.03% New 98,800 $2.3M
PDT Partners, LLC 0.14% Add +178.0% 98,626 $2.3M
Martingale Asset Management L P 0.06% Reduce -4.3% 96,223 $2.2M
California State Teachers Retirement System 0.00% Add +36.6% 91,451 $2.1M
Universal- Beteiligungs- und Servicegesellschaft mbH 0.00% Reduce -40.0% 90,219 $2.1M
Janus Henderson Group PLC 0.00% Add +171.1% 87,505 $2.0M
Deutsche Bank AG 0.00% Add +9.9% 80,525 $1.9M
Canada Pension Plan Investment Board 0.00% Reduce -4.5% 78,300 $1.8M
Fisher Asset Management 0.00% Add +0.4% 74,886 $1.7M
Cresset Asset Management, LLC 0.01% Add +0.6% 72,854 $1.7M
ExodusPoint Capital Management, LP 0.02% New 72,385 $1.7M
KLP Kapitalforvaltning As 0.01% No change 69,500 $1.6M
Brooklyn Investment Group 0.05% Add +25.7% 68,949 $1.6M
Nilsine Partners, LLC 0.12% Add +6.6% 55,864 $1.5M
Allianz Asset Management GmbH 0.00% Reduce -1.7% 65,955 $1.5M
Globeflex Capital L P 0.23% No change 65,303 $1.5M
Summit Global Investments 0.09% Reduce -5.3% 63,936 $1.5M
Verity Asset Management, Inc. 0.60% Reduce -32.2% 62,353 $1.4M
CANADA LIFE ASSURANCE Co 0.00% Reduce -6.0% 59,168 $1.4M
Allspring Global Investments Holdings, LLC 0.00% Add +11.4% 55,218 $1.3M
Alliancebernstein L.P. 0.00% Add +4.3% 72,558 $1.3M
Quantinno Capital Management LP 0.00% Add +151.3% 55,029 $1.3M
SG Americas Securities, LLC 0.00% Add +6.0% 54,521 $1.3M
XTX Topco Ltd 0.02% Add +15.3% 50,129 $1.2M
AQR Capital Management 0.00% Add +29.1% 49,846 $1.2M
Legato Capital Management LLC 0.10% Reduce -39.6% 48,392 $1.1M
Thrivent Financial for Lutherans 0.00% Reduce -3.2% 47,723 $1.1M
State of Alaska, Department of Revenue 0.01% Reduce -2.5% 47,065 $1.1M
VANGUARD ASSET MANAGEMENT, Ltd 0.00% — 46,610 $1.1M
Squarepoint Ops LLC 0.00% New 45,864 $1.1M
Citigroup Inc. 0.00% Reduce -29.7% 45,743 $1.1M
VARCOV Co. 0.39% New 44,778 $1.0M
Mackenzie Financial Corp. 0.00% Reduce -56.0% 44,129 $1.0M
GAMCO Investors 0.01% No change 42,750 $988K
Aquatic Capital Management LLC 0.03% New 42,737 $988K
Illumine Investment Management, LLC 0.76% Add +0.1% 42,732 $988K
Gsa Capital Partners LLP 0.06% Add +23.0% 40,988 $948K
Magnetar Financial LLC 0.01% New 40,453 $935K
Amundi 0.00% Add +6.7% 40,416 $934K
Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% Add +24.6% 39,540 $914K
MetLife Investment Management, LLC 0.00% Reduce -0.9% 38,856 $898K
Raymond James Financial Inc. 0.00% Reduce -47.0% 37,849 $875K
Teton Advisors, LLC 0.59% No change 36,000 $832K
Horizon Investments, LLC 0.01% Reduce -2.2% 34,314 $793K
Tidal Investments LLC 0.00% Add +14.2% 33,989 $786K
Illinois Municipal Retirement Fund 0.01% Reduce -7.3% 33,229 $768K
Evergreen Capital Management LLC 0.02% Add +11.2% 33,106 $765K
Louisiana State Employees Retirement System 0.01% Reduce -3.6% 31,700 $733K
Manufacturers Life Insurance Company, The 0.00% Reduce -4.1% 29,501 $682K
Trexquant Investment LP 0.00% Reduce -83.3% 29,323 $678K
Pathstone Holdings, LLC 0.00% Add +144.9% 29,138 $674K
nVerses Capital, LLC 0.61% New 29,119 $673K
State of Tennessee, Department of Treasury 0.00% Add +75.4% 29,086 $672K
Unique Wealth Strategies, LLC 0.27% New 28,208 $652K
FMR LLC 0.00% Add +68.1% 28,106 $650K
Vanguard Global Advisers, LLC 0.00% — 27,840 $644K
Mirae Asset Global Investments Co., Ltd. 0.00% Add +16.5% 27,422 $634K
WINTON GROUP Ltd 0.02% Reduce -63.0% 26,457 $612K
1492 Capital Management LLC 0.23% Add +33.3% 26,378 $610K
Cookson Peirce & Co. Inc. 0.02% New 25,000 $578K
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main 0.00% Reduce -82.2% 24,983 $578K
Brevan Howard Capital Management LP 0.01% New 24,900 $576K
Optimize Financial Inc. 0.27% No change 23,700 $548K
Weiss Asset Management LP 0.01% New 21,630 $500K
Amalgamated Bank 0.00% Reduce -1.9% 20,597 $476K
New York State Teachers Retirement System 0.00% Add +18.8% 20,501 $474K
Captrust Financial Advisors 0.00% New 20,273 $469K
Police & Firemen's Retirement System of New Jersey 0.00% Add +9.3% 20,050 $464K
Gotham Asset Management 0.00% Reduce -42.5% 19,882 $460K
Seizert Capital Partners, LLC 0.02% No change 19,747 $457K
Arizona State Retirement System 0.00% Reduce -1.6% 19,701 $455K
Vanguard Investments Australia, Ltd. 0.00% — 19,665 $455K
Yousif Capital Management, LLC 0.01% Reduce -0.9% 19,049 $440K
Pacer Advisors, Inc. 0.00% Add +35.5% 18,413 $426K
Schonfeld Strategic Advisors LLC 0.00% New 18,035 $417K
Lazard Asset Management LLC 0.00% Reduce -36.1% 17,993 $416K
Teachers Retirement System of the State of Kentucky 0.00% No change 17,891 $414K
Linden Thomas Advisory Services, LLC 0.04% Add +22.1% 17,728 $410K
Commonwealth of Pennsylvania Public School Empls Retrmt SYS 0.00% Reduce -0.4% 17,681 $409K
Axq Capital, LP 0.05% New 17,556 $406K
Fifth Third Bancorp 0.00% Add +3005.6% 17,081 $395K
Inceptionr LLC 0.09% New 16,531 $382K
Oregon Public Employees Retirement Fund 0.01% Reduce -0.6% 16,318 $377K
Intech Investment Management LLC 0.00% Reduce -45.6% 15,752 $364K
Cim Investment Management Inc. 0.09% Add +42.0% 15,292 $354K
Commonwealth Equity Services, LLC 0.00% Reduce -42.3% 14,763 $341K
Neuberger Berman Group LLC 0.00% New 14,512 $336K
Vanguard Personalized Indexing Management, LLC 0.00% New 14,366 $332K
Pinnacle Financial Partners, Inc. 0.00% Reduce -0.3% 14,209 $329K
Abel Hall, LLC 0.06% New 12,663 $293K
Cornerstone Investment Partners, LLC 0.01% New 12,183 $282K
BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.00% Add +4.3% 12,078 $279K
US Bancorp \de 0.00% Add +0.3% 11,988 $277K
Simplex Trading, LLC 0.01% Add +643.5% 11,717 $271K
Empowered Funds, LLC 0.00% New 11,689 $270K
Freestone Grove Partners LP 0.00% New 11,591 $268K
ProShare Advisors LLC 0.00% Reduce -20.0% 11,188 $259K
Summit Trail Advisors, LLC 0.00% New 10,913 $252K
Impact Partnership Wealth, LLC 0.03% New 10,573 $244K
Campbell & CO Investment Adviser LLC 0.01% New 10,561 $244K
Maryland State Retirement & Pension System 0.00% No change 10,502 $243K
Glenmede Trust Co. NA 0.00% New 10,382 $240K
LSV Asset Management 0.00% No change 10,400 $240K
Pictet Asset Management Holding SA 0.00% New 10,290 $238K
Gabelli Funds LLC 0.00% No change 10,000 $231K
Hohimer Wealth Management, LLC 0.03% Reduce -15.2% 9,654 $223K
M&T Bank Corp 0.00% New 9,273 $214K
Leonteq Securities AG 0.01% Add +111.3% 9,229 $213K
Dynamic Technology Lab Private Ltd 0.03% Reduce -57.2% 9,140 $211K
Merit Financial Group, LLC 0.00% New 8,810 $204K
State of Wyoming 0.02% New 7,799 $180K
Tower Research Capital LLC (TRC) 0.00% Add +6.3% 7,321 $169K
GAMMA Investing LLC 0.01% Add +49.8% 6,608 $153K
Ameritas Investment Partners, Inc. 0.00% No change 6,009 $139K
Nkcfo LLC 0.03% New 5,000 $116K
Osaic Holdings, Inc. 0.00% Add +508.5% 4,302 $99K
PNC Financial Services Group, Inc. 0.00% Add +14.1% 3,938 $91K
Rockefeller Capital Management L.P. 0.00% Add +292.1% 3,827 $88K
Cwm, LLC 0.00% Add +7.0% 3,246 $75K
KBC Group NV 0.00% No change 3,197 $74K
Parkside Financial Bank & Trust 0.00% No change 2,408 $56K
Towarzystwo Funduszy Inwestycyjnych Pzu SA 0.02% No change 2,300 $53K
Quadrant Capital Group LLC 0.00% Add +162.9% 2,295 $53K
Natixis 0.00% Reduce -0.5% 2,260 $52K
Group One Trading LLC 0.00% New 2,050 $47K
Hantz Financial Services, Inc. 0.00% Reduce -63.1% 1,850 $43K
Signaturefd, LLC 0.00% Add +41.8% 1,738 $40K
Nisa Investment Advisors, LLC 0.00% Add +12.7% 1,595 $37K
Huntington National Bank 0.00% Reduce -1.2% 1,511 $35K
MassMutual Private Wealth & Trust, FSB 0.00% Reduce -9.1% 1,455 $34K
Farther Finance Advisors, LLC 0.00% Reduce -38.2% 1,393 $34K
Salomon & Ludwin, LLC 0.00% Add +4.7% 1,325 $32K
Versant Capital Management, Inc 0.00% Add +7973.3% 1,211 $28K
Kemnay Advisory Services Inc. 0.00% New 830 $19K
Steigerwald, Gordon & Koch Inc. 0.00% No change 800 $18K
Sterling Capital Management LLC 0.00% Reduce -26.7% 756 $17K
Northwestern Mutual Wealth Management Co. 0.00% No change 728 $17K
Federation des caisses Desjardins du Quebec 0.00% Add +571.0% 671 $16K
Jones Financial Companies LLLP 0.00% No change 668 $15K
SBI Securities Co., Ltd. 0.00% Reduce -1.1% 636 $15K
UMB Bank, n.a. 0.00% Add +17.8% 590 $14K
Allworth Financial LP 0.00% Add +129.2% 541 $13K
Aster Capital Management (DIFC) Ltd 0.00% Reduce -48.4% 760 $12K
Covestor Ltd 0.01% Add +1.1% 457 $10K
Smartleaf Asset Management LLC 0.00% Reduce -42.8% 419 $9K
WealthCollab, LLC 0.00% No change 390 $9K
Marquette Asset Management, LLC 0.00% Add +76.0% 382 $9K
Cassaday & Co Wealth Management LLC 0.00% New 380 $9K
Pinnacle Wealth Planning Services, Inc. 0.00% Add +24.5% 371 $9K
Barrow Hanley Mewhinney & Strauss LLC 0.00% New 349 $8K
Bell Investment Advisors, Inc 0.00% New 331 $8K
Los Angeles Capital Management LLC 0.00% No change 327 $8K
First Pacific Financial 0.00% Add +40.2% 321 $7K
Arax Advisory Partners 0.00% Add +624.9% 1,341 $6K
Sound Income Strategies, LLC 0.00% Add +0.4% 265 $6K
Parallel Advisors, LLC 0.00% Add +100.8% 267 $6K
EverSource Wealth Advisors, LLC 0.00% Add +25.7% 235 $5K
Assetmark, Inc. 0.00% Add +34.1% 220 $5K
Public Employees Retirement System of Ohio 0.00% New 184 $4K
Rothschild Investment LLC 0.00% Add +90.0% 171 $4K
Allianz SE 0.00% New 150 $3K
Keating Financial Advisory Services, Inc. 0.00% New 126 $3K
MAI Capital Management 0.00% Reduce -64.6% 122 $3K
Private Wealth Management Group, LLC 0.00% No change 112 $3K
Root Financial Partners, LLC 0.00% New 100 $2K
Aventura Private Wealth, LLC 0.00% Reduce -51.5% 97 $2K
Ascentis Independent Advisors 0.00% New 82 $2K
Farmers & Merchants Investments Inc. 0.00% No change 50 $1K
Investors Portfolio Services LLC 0.00% New 34 $939
SouthState Bank Corp 0.00% No change 34 $787
Caitong International Asset Management Co., Ltd 0.00% New 30 $694
Bare Financial Services, Inc 0.00% New 29 $670
Bruce G. Allen Investments, LLC 0.00% Add +4.0% 26 $601
Essential Partners LLC 0.00% No change 23 $532
Elequin Capital, LP 0.00% New 21 $486
Ankerstar Wealth, LLC 0.00% No change 19 $439
Gilpin Wealth Management, LLC 0.00% Add +200.0% 18 $417
Larson Financial Group LLC 0.00% New 10 $223
Hughes Financial Services, LLC 0.00% New 2 $46
Avion Wealth 0.00% No change 30 $0

"% of holder's portfolio" is ATEN's weight in each manager's 13F, not the share of A10 Networks Inc. the manager owns.