ATEN Institutional Ownership
Who owns A10 Networks, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 315 funds reported holding ATEN at Jun 30, 2026, together owning 128.6% of the company.
- ▲170 buying vs 128 selling
- ▲Held by funds +29.0 pts
- ▲Funds holding +50
- ▼Superinvestors: 0 added, 3 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 315 | 265 | +18.9% |
| In funds' top 10 | 4 | 3 | +33.3% |
| 13F shares | 93.4M | 72.3M | +29.1% |
| Held by funds | 128.6% | 99.6% | +29.0 pts |
| New positions | 81 | 53 | +52.8% |
| Increased | 89 | 98 | −9.2% |
| Reduced | 100 | 77 | +29.9% |
| Sold out | 28 | 32 | −12.5% |
| Calls (shares) | 123K | 13K | +856.6% |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | 0.00 | 0.00 | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in ATEN
All superinvestors →
Who owns ATEN
share of fund held shares- Index and passive funds35.8%
- Active managers and hedge funds52.3%
- Banks and brokers10.9%
- Pensions, insurers and other1.1%
The top 10 holders own 53.4% of all ATEN shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
65 funds changed their position- Boston Trust Walden CorpAdded+602K sh
- Robeco Institutional Asset Management B.V.Added+160K sh
- Wasatch Advisors LPAdded+119K sh
- Absolute Investment Advisers, LLCAdded+2M sh
- Cookson Peirce & Co IncSold out−53K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 18.69% | 13.6M | $507M | +480K |
| 2 | Absolute Investment Advisers, LLC | 15.15% | 11M | $18.6M | +11M |
| 3 | Picton Mahoney Asset Management | 6.89% | 5M | $8.5M | +5M |
| 4 | Vanguard Portfolio Management LLC | 4.77% | 3.5M | $129M | +74K |
| 5 | First Trust Advisors LP | 4.47% | 3.2M | $121M | +1.5M |
| 6 | State Street Corp | 4.25% | 3.1M | $115M | −7,554 |
| 7 | Vanguard Capital Management LLC | 4.23% | 3.1M | $115M | −50K |
| 8 | Penserra Capital Management LLC | 4.23% | 3.1M | $115M | −526K |
| 9 | Boston Trust Walden Corp | 3.33% | 2.4M | $90.3M | +244K |
| 10 | Wellington Management Group LLP | 2.70% | 2M | $73.2M | −115K |
- First Trust Advisors LP+1.5M sh+$57M
- Fmr LLC+1.4M sh+$52.5M
- Nomura Asset Management International Inc.+897K sh+$33.5M
- Loomis Sayles & Co L P+884K sh+$33M
- Invesco Ltd.+880K sh+$32.9M
- Goldman Sachs Group Inc+598K sh+$22.3M
- Absolute Investment Advisers, LLC+11M sh+$18.6M
- BlackRock, Inc.+480K sh+$17.9M
- Barclays PLC−912K sh−$34.1M
- Penserra Capital Management LLC−526K sh−$19.7M
- Jane Street Group, LLC−502K sh−$18.8M
- Citadel Advisors LLC−421K sh−$15.7M
- Deprince Race & Zollo Inc−565K sh−$13.1M
- Punch & Associates Investment Management, Inc.−271K sh−$10.1M
- Renaissance Technologies LLC−265K sh−$9.9M
- Russell Investments Group, Ltd.−255K sh−$9.5M
ATEN institutional ownership FAQ
Who owns the most ATEN stock?
In Q2 2026 13F filings the largest holder of ATEN was BlackRock, Inc., followed by Absolute Investment Advisers, LLC and Picton Mahoney Asset Management. Index fund managers are usually the biggest holders of large companies.
What percentage of ATEN is owned by institutions?
Funds that file 13F reports held 128.6% of ATEN's shares at Jun 30, 2026, compared with 99.6% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying ATEN?
In Q2 2026, 170 funds bought ATEN (81 of them new positions) and 128 sold (28 sold out completely). Among well known investors, 0 added and 3 cut. Our fund sentiment for ATEN is bullish.
What is ATEN's institutional put/call ratio?
Funds reported $0 of ATEN puts against $4.6M of calls, a put/call ratio of 0.00 (0.00 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this ATEN ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.