ATEN Institutional Ownership & Shareholders
A10 NETWORKS INC (ATEN) is currently held by 303 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $2.82B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ATEN tracked by InsiderSet, reporting ownership valued at approximately $506.92M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $319.13M, representing an estimated loss of -37.04% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 49% of the total disclosed ATEN value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, First Trust Advisors Lp, and several other long-term asset managers with concentrated positions in A10 NETWORKS INC (ATEN).
This page ranks the largest institutional ATEN shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
303
Total Reported Value
$2.82B
Largest Holder
Blackrock, Inc.
Largest Position
$506.92M
Insider Transactions (90d)
4
Latest Filing Quarter
Q2 2026
New Institutional Positions
77
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 13,568,496 | $506,918,999 | $319,131,026 | -$187,787,973 | -37.04% | |
| Vanguard Portfolio Management Llc | 0.01% | 3,462,058 | $129,342,487 | $81,427,604 | -$47,914,883 | -37.04% | |
| First Trust Advisors Lp | 0.07% | 3,244,739 | $121,223,449 | $76,316,261 | -$44,907,188 | -37.04% | |
| State Street Corp | 0.00% | 3,082,631 | $115,167,094 | $72,503,481 | -$42,663,613 | -37.04% | |
| Vanguard Capital Management Llc | 0.00% | 3,071,071 | $114,735,213 | $72,231,590 | -$42,503,623 | -37.04% | |
| Penserra Capital Management Llc | 0.88% | 3,068,045 | $114,621,000 | $72,160,418 | -$42,460,582 | -37.04% | |
| Boston Trust Walden Corp | 0.66% | 3,018,750 | $81,838,312 | $71,001,000 | -$10,837,312 | -13.24% | |
| Wellington Management Group Llp | 0.01% | 1,959,853 | $73,220,107 | $46,095,743 | -$27,124,364 | -37.04% | |
| Geode Capital Management, Llc | 0.00% | 1,813,638 | $67,771,453 | $42,656,766 | -$25,114,687 | -37.06% | |
| Goldman Sachs Group Inc | 0.01% | 1,784,946 | $66,685,570 | $41,981,930 | -$24,703,640 | -37.04% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,599,129 | $59,740,024 | $37,611,514 | -$22,128,510 | -37.04% | |
| Renaissance Technologies LLC | Jim Simons | 0.08% | 1,520,287 | $56,797,922 | $35,757,150 | -$21,040,772 | -37.04% |
| Arrowstreet Capital, Limited Partnership | 0.02% | 1,437,650 | $53,710,604 | $33,813,528 | -$19,897,076 | -37.04% | |
| Fmr Llc | 0.00% | 1,433,878 | $53,569,672 | $33,724,811 | -$19,844,861 | -37.04% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.06% | 1,426,608 | $53,274,522 | $33,553,820 | -$19,720,702 | -37.02% | |
| Invesco Ltd. | 0.00% | 1,243,053 | $46,440,461 | $29,236,607 | -$17,203,854 | -37.04% | |
| Punch & Associates Investment Management, Inc. | 2.20% | 1,188,747 | $44,411,605 | $27,959,329 | -$16,452,276 | -37.04% | |
| Two Sigma Investments, Lp | 0.03% | 1,124,963 | $42,028,618 | $26,459,130 | -$15,569,488 | -37.04% | |
| Prudential Financial Inc | 0.04% | 1,048,320 | $39,165,235 | $24,656,486 | -$14,508,749 | -37.04% | |
| Barclays Plc | 0.01% | 962,382 | $35,954,591 | $22,635,225 | -$13,319,366 | -37.04% | |
| Morgan Stanley | 0.00% | 908,083 | $33,926,044 | $21,358,112 | -$12,567,932 | -37.05% | |
| Nomura Asset Management International Inc. | 0.05% | 896,517 | $33,494,000 | $21,086,080 | -$12,407,920 | -37.05% | |
| Price T Rowe Associates Inc | 0.00% | 894,398 | $33,416,000 | $21,036,241 | -$12,379,759 | -37.05% | |
| Loomis Sayles & Co L P | 0.04% | 884,023 | $33,027,099 | $20,792,221 | -$12,234,878 | -37.04% | |
| Boston Partners | 0.03% | 802,469 | $30,016,792 | $18,874,071 | -$11,142,721 | -37.12% | |
| Charles Schwab Investment Management Inc | 0.00% | 761,676 | $28,456,215 | $17,914,620 | -$10,541,595 | -37.04% | |
| Northern Trust Corp | 0.00% | 756,476 | $28,261,943 | $17,792,316 | -$10,469,627 | -37.04% | |
| Ubs Group Ag | 0.00% | 736,554 | $27,517,658 | $17,323,750 | -$10,193,908 | -37.04% | |
| Bank Of New York Mellon Corp | 0.00% | 659,883 | $24,653,236 | $15,520,448 | -$9,132,788 | -37.04% | |
| Royce & Associates Lp | 0.18% | 597,646 | $22,328,055 | $14,056,634 | -$8,271,421 | -37.04% | |
| Bnp Paribas Financial Markets | 0.01% | 573,164 | $21,413,407 | $13,480,817 | -$7,932,590 | -37.04% | |
| Oberweis Asset Management Inc/ | 0.43% | 552,000 | $20,622,720 | $12,983,040 | -$7,639,680 | -37.04% | |
| D. E. Shaw & Co., Inc. | 0.01% | 547,577 | $20,457,477 | $12,879,011 | -$7,578,466 | -37.04% | |
| Vanguard Fiduciary Trust Co | 0.00% | 511,169 | $19,097,274 | $12,022,695 | -$7,074,579 | -37.04% | |
| Royal Bank Of Canada | 0.00% | 463,003 | $17,298,000 | $10,889,831 | -$6,408,169 | -37.05% | |
| Bank Of America Corp | 0.00% | 461,387 | $17,237,418 | $10,851,822 | -$6,385,596 | -37.04% | |
| Aptus Capital Advisors, Llc | 0.12% | 457,762 | $17,101,989 | $10,766,562 | -$6,335,427 | -37.04% | |
| Acadian Asset Management Llc | 0.02% | 455,769 | $17,012,000 | $10,719,687 | -$6,292,313 | -36.99% | |
| Principal Financial Group Inc | 0.01% | 446,423 | $16,678,363 | $10,499,869 | -$6,178,494 | -37.04% | |
| Defiance Etfs, Llc | 0.22% | 412,194 | $15,663,372 | $9,694,803 | -$5,968,569 | -38.11% | |
| Impax Asset Management Group Plc | 0.10% | 410,000 | $15,317,600 | $9,643,200 | -$5,674,400 | -37.04% | |
| Wasatch Advisors Lp | 0.11% | 535,558 | $14,518,977 | $12,596,324 | -$1,922,653 | -13.24% | |
| Ceredex Value Advisors Llc | 0.41% | 387,750 | $14,486,340 | $9,119,880 | -$5,366,460 | -37.04% | |
| Paradigm Capital Management Inc/Ny | 0.39% | 384,700 | $14,372,392 | $9,048,144 | -$5,324,248 | -37.04% | |
| Wells Fargo & Company/Mn | 0.00% | 329,534 | $12,311,401 | $7,750,640 | -$4,560,761 | -37.05% | |
| Jump Financial, Llc | 0.11% | 324,417 | $12,120,220 | $7,630,288 | -$4,489,932 | -37.04% | |
| Crawford Investment Counsel Inc | 0.18% | 295,532 | $11,041,076 | $6,950,913 | -$4,090,163 | -37.04% | |
| Jpmorgan Chase & Co | 0.00% | 283,306 | $10,409,889 | $6,663,357 | -$3,746,532 | -35.99% | |
| Envestnet Asset Management Inc | 0.00% | 247,901 | $9,261,565 | $5,830,632 | -$3,430,933 | -37.04% | |
| Public Sector Pension Investment Board | 0.02% | 247,318 | $9,239,800 | $5,816,919 | -$3,422,881 | -37.04% |
Frequently asked questions about ATEN
Who are the largest institutional holders of ATEN?
The largest institutional holders of ATEN reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Portfolio Management Llc, First Trust Advisors Lp, State Street Corp, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported ATEN position.
What is ATEN institutional ownership?
This page tracks ATEN positions reported by institutional investment managers through SEC Form 13F. A10 NETWORKS INC (ATEN) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ATEN?
InsiderSet currently tracks 303 institutional managers reporting ATEN holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ATEN shareholders.
How much ATEN stock do institutions own?
Institutional investment managers disclosed approximately $2.82B in ATEN holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ATEN institutional ownership last updated?
The latest ATEN institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ATEN holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ATEN position after the reporting date.
Are institutions buying or selling ATEN?
Institutional buying and selling can be analyzed by comparing ATEN positions across consecutive 13F reporting periods. InsiderSet's ATEN Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ATEN ownership changes.
How has ATEN institutional ownership changed over time?
InsiderSet tracks ATEN institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.