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
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 53 | $77.5M |
| Exits | 29 | $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 |
"% of holder's portfolio" is ATEN's weight in each manager's 13F, not the share of A10 Networks Inc. the manager owns.