A10 Networks, Inc. (ATEN) — Institutional Holders, Q2 2026
323 institutional investment managers reported a ATEN position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $3.2B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
ATEN in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- FIRST ADVISORSAdded · +1,524,922 sh+$57.0M
- FMRAdded · +1,405,772 sh+$52.5M
- NOMURA ASSET MANAGEMENT INTERNATIONALNew · +896,517 sh+$33.5M
- LOOMIS SAYLES & L PNew · +884,023 sh+$33.0M
- Invesco Ltd.Added · +880,381 sh+$32.9M
Biggest sellers
- BARCLAYS PLCTrimmed · -912,120 sh-$34.1M
- DEPRINCE RACE & ZOLLOSold out · -564,800 sh-$21.1M
- Penserra Capital ManagementTrimmed · -526,067 sh-$19.7M
- JANE STREET GROUPTrimmed · -502,068 sh-$18.8M
- CITADEL ADVISORSTrimmed · -420,780 sh-$15.7M
ATEN 13F holders ranked 1–100 of 323
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | BlackRock#1 · 13,568,496 sh | 13,568,496 | $506.9M | <0.01% | +3.7% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT#2 · 3,462,058 sh | 3,462,058 | $129.3M | <0.01% | +2.2% |
| 3 | FIRST ADVISORS#3 · 3,244,739 sh | 3,244,739 | $121.2M | 0.07% | +88.7% |
| 4 | STATE STREET#4 · 3,082,631 sh | 3,082,631 | $115.2M | <0.01% | -0.2% |
| 5 | VANGUARD CAPITAL MANAGEMENT#5 · 3,071,071 sh | 3,071,071 | $114.7M | <0.01% | -1.6% |
| 6 | Penserra Capital Management#6 · 3,068,045 sh | 3,068,045 | $114.6M | 0.88% | -14.6% |
| 7 | Boston Walden#7 · 2,416,808 sh | 2,416,808 | $90.3M | 0.69% | +11.2% |
| 8 | LINDEN ADVISORS#8 · 49,555,000 sh | 49,555,000 | $84.1M | 0.44% | New |
| 9 | WELLINGTON MANAGEMENT GROUP LLP#9 · 1,959,853 sh | 1,959,853 | $73.2M | 0.01% | -5.5% |
| 10 | FMR#10 · 12,433,878 sh | 12,433,878 | $72.2M | <0.01% | New |
| 11 | GEODE CAPITAL MANAGEMENT#11 · 1,813,638 sh | 1,813,638 | $67.8M | <0.01% | +5.6% |
| 12 | D. E. Shaw#12 · 28,047,577 sh | 28,047,577 | $67.3M | 0.03% | New |
| 13 | GOLDMAN SACHS GROUP#13 · 1,784,946 sh | 1,784,946 | $66.7M | <0.01% | +50.4% |
| 14 | DIMENSIONAL FUND ADVISORS#14 · 1,599,129 sh | 1,599,129 | $59.7M | 0.01% | -2.3% |
| 15 | RENAISSANCE TECHNOLOGIES#15 · 1,520,287 sh | 1,520,287 | $56.8M | 0.08% | -14.8% |
| 16 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#16 · 1,437,650 sh | 1,437,650 | $53.7M | 0.02% | -4.0% |
| 17 | MIRAE ASSET GLOBAL ETFS Ltd.#17 · 1,426,608 sh | 1,426,608 | $53.3M | 0.06% | -8.3% |
| 18 | CITADEL ADVISORS#18 · 27,998,240 sh | 27,998,240 | $51.0M | <0.01% | +5346.9% |
| 19 | Invesco Ltd.#19 · 1,243,053 sh | 1,243,053 | $46.4M | <0.01% | +242.7% |
| 20 | WOLVERINE ASSET MANAGEMENT#20 · 27,250,000 sh | 27,250,000 | $46.2M | 0.41% | New |
| 21 | PUNCH & ASSOCIATES INVESTMENT MANAGEMENT#21 · 1,188,747 sh | 1,188,747 | $44.4M | 2.20% | -18.6% |
| 22 | TWO SIGMA INVESTMENTS#22 · 1,124,963 sh | 1,124,963 | $42.0M | 0.03% | -14.8% |
| 23 | PRUDENTIAL FINANCIAL#23 · 1,048,320 sh | 1,048,320 | $39.2M | 0.04% | +18.4% |
| 24 | TENOR CAPITAL MANAGEMENT , L.P.#24 · 21,250,000 sh | 21,250,000 | $36.4M | 0.51% | New |
| 25 | UBS Group AG#25 · 5,730,554 sh | 5,730,554 | $36.0M | <0.01% | +1369.2% |
| 26 | BARCLAYS PLC#26 · 962,382 sh | 962,382 | $36.0M | <0.01% | -48.7% |
| 27 | MORGAN STANLEY#27 · 908,083 sh | 908,083 | $33.9M | <0.01% | +11.7% |
| 28 | NOMURA ASSET MANAGEMENT INTERNATIONAL#28 · 896,517 sh | 896,517 | $33.5M | 0.05% | New |
| 29 | PRICE T ROWE ASSOCIATES#29 · 894,398 sh | 894,398 | $33.4M | <0.01% | -16.6% |
| 30 | LOOMIS SAYLES & L P#30 · 884,023 sh | 884,023 | $33.0M | 0.04% | New |
| 31 | BNP PARIBAS FINANCIAL MARKETS#31 · 6,093,164 sh | 6,093,164 | $30.8M | 0.01% | +1463.5% |
| 32 | Boston Partners#32 · 802,469 sh | 802,469 | $30.0M | 0.03% | -1.6% |
| 33 | CHARLES SCHWAB INVESTMENT MANAGEMENT#33 · 761,676 sh | 761,676 | $28.5M | <0.01% | +2.4% |
| 34 | NORTHERN#34 · 756,476 sh | 756,476 | $28.3M | <0.01% | +7.4% |
| 35 | Bank of New York Mellon#35 · 1,559,883 sh | 1,559,883 | $26.1M | <0.01% | +136.1% |
| 36 | DAVIDSON KEMPNER CAPITAL MANAGEMENT#36 · 15,000,000 sh | 15,000,000 | $25.4M | 0.30% | New |
| 37 | ROYCE & ASSOCIATES#37 · 597,646 sh | 597,646 | $22.3M | 0.18% | -26.9% |
| 38 | OBERWEIS ASSET MANAGEMENT#38 · 552,000 sh | 552,000 | $20.6M | 0.43% | +9.5% |
| 39 | VANGUARD FIDUCIARY#39 · 511,169 sh | 511,169 | $19.1M | <0.01% | +3.4% |
| 40 | ABSOLUTE INVESTMENT ADVISERS#40 · 11,000,000 sh | 11,000,000 | $18.6M | — | New |
| 41 | ROYAL BANK OF CANADA#41 · 463,003 sh | 463,003 | $17.3M | <0.01% | -13.7% |
| 42 | BANK OF AMERICA#42 · 461,387 sh | 461,387 | $17.2M | <0.01% | +123.2% |
| 43 | Aptus Capital Advisors#43 · 457,762 sh | 457,762 | $17.1M | 0.12% | +0.6% |
| 44 | ACADIAN ASSET MANAGEMENT#44 · 455,769 sh | 455,769 | $17.0M | 0.02% | New |
| 45 | PRINCIPAL FINANCIAL GROUP#45 · 446,423 sh | 446,423 | $16.7M | <0.01% | +2.3% |
| 46 | Defiance ETFs#46 · 412,194 sh | 412,194 | $15.7M | 0.21% | -2.6% |
| 47 | WASATCH ADVISORS#47 · 416,114 sh | 416,114 | $15.5M | — | New |
| 48 | Impax Asset Management Group plc#48 · 410,000 sh | 410,000 | $15.3M | 0.10% | -12.8% |
| 49 | CAPSTONE INVESTMENT ADVISORS#49 · 9,000,000 sh | 9,000,000 | $15.3M | 0.01% | New |
| 50 | Ceredex Value Advisors#50 · 387,750 sh | 387,750 | $14.5M | 0.41% | New |
| 51 | PARADIGM CAPITAL MANAGEMENT#51 · 384,700 sh | 384,700 | $14.4M | 0.39% | -4.2% |
| 52 | JPMORGAN CHASE#52 · 2,073,306 sh | 2,073,306 | $13.3M | <0.01% | +534.7% |
| 53 | WELLS FARGO & COMPANY#53 · 329,534 sh | 329,534 | $12.3M | <0.01% | -0.9% |
| 54 | Jump Financial#54 · 324,417 sh | 324,417 | $12.1M | 0.10% | +12.9% |
| 55 | SILVERBACK ASSET MANAGEMENT#55 · 6,750,000 sh | 6,750,000 | $11.5M | 1.24% | New |
| 56 | Bridge City Capital#56 · 296,239 sh | 296,239 | $11.1M | 2.53% | -26.1% |
| 57 | CRAWFORD INVESTMENT COUNSEL#57 · 295,532 sh | 295,532 | $11.0M | 0.18% | -7.8% |
| 58 | ENVESTNET ASSET MANAGEMENT#58 · 247,901 sh | 247,901 | $9.3M | <0.01% | New |
| 59 | PUBLIC SECTOR PENSION INVESTMENT BOARD#59 · 247,318 sh | 247,318 | $9.2M | 0.02% | -3.3% |
| 60 | RICE HALL JAMES & ASSOCIATES#60 · 245,117 sh | 245,117 | $9.2M | 0.45% | -27.2% |
| 61 | Nuveen#61 · 236,607 sh | 236,607 | $8.8M | <0.01% | +49.2% |
| 62 | AMERICAN CENTURY COMPANIES#62 · 234,381 sh | 234,381 | $8.8M | <0.01% | +5.4% |
| 63 | PICTON MAHONEY ASSET MANAGEMENT#63 · 5,000,000 sh | 5,000,000 | $8.5M | 0.06% | New |
| 64 | Portolan Capital Management#64 · 226,920 sh | 226,920 | $8.5M | 0.32% | New |
| 65 | PEREGRINE CAPITAL MANAGEMENT#65 · 201,952 sh | 201,952 | $7.5M | 0.25% | -8.0% |
| 66 | SUMMIT PARTNERS L P#66 · 200,065 sh | 200,065 | $7.5M | 1.23% | 0.0% |
| 67 | Legal & General Group Plc#67 · 189,446 sh | 189,446 | $7.1M | <0.01% | -0.6% |
| 68 | Informed Momentum#68 · 188,768 sh | 188,768 | $7.1M | 0.63% | New |
| 69 | MILLENNIUM MANAGEMENT#69 · 375,579 sh | 375,579 | $6.9M | <0.01% | -9.5% |
| 70 | Connor, Clark & Lunn Investment Management Ltd.#70 · 178,808 sh | 178,808 | $6.7M | 0.01% | +31.1% |
| 71 | RHUMBLINE ADVISERS#71 · 172,167 sh | 172,167 | $6.4M | <0.01% | -10.4% |
| 72 | BESSEMER GROUP#72 · 171,223 sh | 171,223 | $6.4M | <0.01% | 0.0% |
| 73 | AMERIPRISE FINANCIAL#73 · 168,623 sh | 168,623 | $6.3M | <0.01% | +36.5% |
| 74 | Uniplan Investment Counsel#74 · 161,381 sh | 161,381 | $6.0M | 0.57% | +51.9% |
| 75 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#75 · 159,216 sh | 159,216 | $5.9M | <0.01% | -1.4% |
| 76 | IQ EQ FUND MANAGEMENT (IRELAND) Ltd#76 · 158,843 sh | 158,843 | $5.9M | 0.38% | -9.3% |
| 77 | SEI INVESTMENTS#77 · 151,678 sh | 151,678 | $5.7M | <0.01% | +25.1% |
| 78 | DEUTSCHE BANK AG\#78 · 1,487,103 sh | 1,487,103 | $5.6M | <0.01% | +1746.8% |
| 79 | Creative Planning#79 · 149,624 sh | 149,624 | $5.6M | <0.01% | +17.6% |
| 80 | HARBOR CAPITAL ADVISORS#80 · 147,669 sh | 147,669 | $5.5M | — | -21.1% |
| 81 | VOYA INVESTMENT MANAGEMENT#81 · 143,421 sh | 143,421 | $5.4M | <0.01% | -13.8% |
| 82 | Hennion & Walsh Asset Management#82 · 141,978 sh | 141,978 | $5.3M | — | +24.4% |
| 83 | TRUIST FINANCIAL#83 · 138,302 sh | 138,302 | $5.2M | <0.01% | +20.2% |
| 84 | CREDIT AGRICOLE S A#84 · 138,000 sh | 138,000 | $5.2M | 0.01% | New |
| 85 | Swiss National Bank#85 · 136,700 sh | 136,700 | $5.1M | <0.01% | -4.0% |
| 86 | 4D Advisors#86 · 135,000 sh | 135,000 | $5.0M | 1.94% | New |
| 87 | Russell Investments Group, Ltd.#87 · 134,991 sh | 134,991 | $5.0M | <0.01% | -65.4% |
| 88 | CITIGROUP#88 · 128,365 sh | 128,365 | $4.8M | <0.01% | +180.6% |
| 89 | VICTORY CAPITAL MANAGEMENT#89 · 122,942 sh | 122,942 | $4.6M | <0.01% | -10.5% |
| 90 | TUDOR INVESTMENT ET AL#90 · 120,260 sh | 120,260 | $4.5M | <0.01% | -49.7% |
| 91 | STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM#91 · 114,819 sh | 114,819 | $4.3M | <0.01% | -11.4% |
| 92 | FEDERATED HERMES#92 · 114,416 sh | 114,416 | $4.3M | <0.01% | +7.7% |
| 93 | Warberg Asset Management#93 · 2,500,000 sh | 2,500,000 | $4.2M | 0.77% | New |
| 94 | PDT Partners#94 · 111,226 sh | 111,226 | $4.2M | 0.22% | +12.8% |
| 95 | Universal- Beteiligungs- und Servicegesellschaft mbH#95 · 104,707 sh | 104,707 | $3.9M | <0.01% | +16.1% |
| 96 | Brevan Howard Capital Management#96 · 102,085 sh | 102,085 | $3.8M | 0.03% | +310.0% |
| 97 | FRANKLIN RESOURCES#97 · 99,729 sh | 99,729 | $3.7M | <0.01% | -4.1% |
| 98 | HSBC PLC#98 · 94,437 sh | 94,437 | $3.5M | <0.01% | -46.3% |
| 99 | JANE STREET GROUP#99 · 93,880 sh | 93,880 | $3.5M | <0.01% | -84.2% |
| 100 | AQR CAPITAL MANAGEMENT#100 · 83,207 sh | 83,207 | $3.1M | <0.01% | +66.9% |
Funds that sold out of ATEN in Q2 2026 (29)
Held ATEN at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| DEPRINCE RACE & ZOLLO564,800 sh | 564,800 | $13.1M |
| HRT FINANCIAL320,380 sh | 320,380 | $7.4M |
| Man Group plc304,441 sh | 304,441 | $7.0M |
| Walleye Capital5,000,000 sh | 5,000,000 | $6.0M |
| Banque Cantonale Vaudoise139,472 sh | 139,472 | $3.2M |
| Hillsdale Investment Management127,661 sh | 127,661 | $3.0M |
| Quantbot Technologies124,535 sh | 124,535 | $2.9M |
| HEALTHCARE OF ONTARIO PENSION PLAN FUND98,907 sh | 98,907 | $2.3M |
| Squarepoint Ops45,864 sh | 45,864 | $1.1M |
| VARCOV44,778 sh | 44,778 | $1.0M |
| MACKENZIE FINANCIAL44,129 sh | 44,129 | $1.0M |
| GSA CAPITAL PARTNERS LLP40,988 sh | 40,988 | $948.0K |
| Magnetar Financial40,453 sh | 40,453 | $935.3K |
| Horizon Investments34,314 sh | 34,314 | $793.3K |
| Trexquant Investment29,323 sh | 29,323 | $677.9K |
| SEIZERT CAPITAL PARTNERS19,747 sh | 19,747 | $456.6K |
| Schonfeld Strategic Advisors18,035 sh | 18,035 | $417.0K |
| INCEPTIONR16,531 sh | 16,531 | $382.2K |
| Dynamic Technology Lab Private Ltd9,140 sh | 9,140 | $211.3K |
| NKCFO5,000 sh | 5,000 | $116.0K |
| QUADRANT CAPITAL GROUP4,590 sh | 4,590 | $102.0K |
| NATIXIS2,260 sh | 2,260 | $52.3K |
| Aster Capital Management (DIFC) Ltd760 sh | 760 | $12.4K |
| Sound Income Strategies265 sh | 265 | $6.4K |
| MAI Capital Management122 sh | 122 | $2.8K |
| Root Financial Partners100 sh | 100 | $2.3K |
| Golden State Equity Partners82 sh | 82 | $1.9K |
| Western Wealth Management5 sh | 5 | $116.00 |
| Elequin Securities21 sh | 21 | — |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.