ATEN A10 Networks, Inc.
A10 Networks, Inc. (ATEN) Institutional Ownership
What the institutions did with ATEN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Boston Trust Walden Corp | 3.0M | 32.3% |
| DIMENSIONAL FUND ADVISORS LP | 1.6M | 17.4% |
| Bank of New York Mellon Corp | 646.5K | 6.9% |
| WASATCH ADVISORS LP | 535.6K | 5.7% |
| PRINCIPAL FINANCIAL GROUP INC | 501.2K | 5.4% |
| BARCLAYS PLC | 446.1K | 4.8% |
| Bridge City Capital, LLC | 334.9K | 3.6% |
| SUMMIT PARTNERS L P | 200.1K | 2.1% |
| Hennion & Walsh Asset Management, Inc. | 181.3K | 1.9% |
| Robeco Institutional Asset Management B.V. | 166.8K | 1.8% |
| Creative Planning | 153.6K | 1.6% |
| HARBOR CAPITAL ADVISORS, INC. | 150.1K | 1.6% |
| TRUIST FINANCIAL CORP | 136.4K | 1.5% |
| CITIGROUP INC | 89.9K | 1.0% |
| Verity Asset Management, Inc. | 79.6K | 0.9% |
| AEGON ASSET MANAGEMENT UK Plc | 74.6K | 0.8% |
| Vest Financial, LLC | 71.0K | 0.8% |
| Allspring Global Investments Holdings, LLC | 59.5K | 0.6% |
| Summit Global Investments | 52.5K | 0.6% |
| Nilsine Partners, LLC | 48.1K | 0.5% |
| Thrivent Financial for Lutherans | 46.2K | 0.5% |
| Asset Management One Co., Ltd. | 43.8K | 0.5% |
| Illinois Municipal Retirement Fund | 37.7K | 0.4% |
| Mirae Asset Global Investments Co., Ltd. | 35.6K | 0.4% |
| Y-Intercept (Hong Kong) Ltd | 33.5K | 0.4% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Boston Trust Walden Corp | Increased | 2.4M | 3.0M | +601.9K |
| BARCLAYS PLC | Reduced | 962.4K | 446.1K | -516.3K |
| Robeco Institutional Asset Management B.V. | Increased | 6.4K | 166.8K | +160.5K |
| WASATCH ADVISORS LP | Increased | 416.1K | 535.6K | +119.4K |
| PRINCIPAL FINANCIAL GROUP INC | Increased | 446.4K | 501.2K | +54.7K |
| COOKSON PEIRCE & CO INC | Sold Out | 52.5K | 0 | -52.5K |
| Asset Management One Co., Ltd. | Increased | 652 | 43.8K | +43.2K |
| Hennion & Walsh Asset Management, Inc. | Increased | 142.0K | 181.3K | +39.3K |
| Bridge City Capital, LLC | Increased | 296.2K | 334.9K | +38.7K |
| CITIGROUP INC | Reduced | 128.4K | 89.9K | -38.4K |
| Summit Global Investments | Increased | 21.4K | 52.5K | +31.0K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 1.6M | 1.6M | +30.6K |
| ABN AMRO INVESTMENT SOLUTIONS | New | 0 | 29.6K | +29.6K |
| STRS OHIO | New | 0 | 29.5K | +29.5K |
| SIMPLEX TRADING, LLC | Reduced | 41.7K | 17.9K | -23.8K |
| Inspire Investing, LLC | New | 0 | 23.2K | +23.2K |
| Y-Intercept (Hong Kong) Ltd | Increased | 13.8K | 33.5K | +19.7K |
| Verity Asset Management, Inc. | Increased | 64.2K | 79.6K | +15.5K |
| DekaBank Deutsche Girozentrale | New | 0 | 14.4K | +14.4K |
| Bank of New York Mellon Corp | Reduced | 659.9K | 646.5K | -13.3K |
| Procyon Advisors, LLC | Sold Out | 12.6K | 0 | -12.6K |
| Caitong International Asset Management Co., Ltd | Increased | 10 | 11.1K | +11.1K |
| State of Alaska, Department of Revenue | Reduced | 35.5K | 24.6K | -10.9K |
| Larson Financial Group LLC | Increased | 361 | 9.7K | +9.3K |
| Nilsine Partners, LLC | Reduced | 56.7K | 48.1K | -8.6K |
| GW HENSSLER & ASSOCIATES LTD | Sold Out | 8.1K | 0 | -8.1K |
| LEVEL FOUR ADVISORY SERVICES, LLC | Reduced | 27.7K | 20.0K | -7.7K |
| XPONANCE LLC | Sold Out | 7.3K | 0 | -7.3K |
| PINNACLE ASSOCIATES LTD | Sold Out | 7.1K | 0 | -7.1K |
| Mirae Asset Global Investments Co., Ltd. | Increased | 28.5K | 35.6K | +7.1K |
| SAWGRASS ASSET MANAGEMENT LLC | Sold Out | 6.7K | 0 | -6.7K |
| PERSONAL CFO SOLUTIONS, LLC | Sold Out | 6.3K | 0 | -6.3K |
| Kingdom Financial Group LLC. | Sold Out | 6.3K | 0 | -6.3K |
| Bayforest Capital Ltd | New | 0 | 6.3K | +6.3K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | Sold Out | 5.9K | 0 | -5.9K |
| Maryland State Retirement & Pension System | Increased | 10.5K | 16.2K | +5.7K |
| Concurrent Investment Advisors, LLC | Sold Out | 5.7K | 0 | -5.7K |
| Vest Financial, LLC | Increased | 66.7K | 71.0K | +4.3K |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM | Reduced | 22.0K | 17.7K | -4.3K |
| Creative Planning | Increased | 149.6K | 153.6K | +4.0K |
| NATIXIS | New | 0 | 2.9K | +2.9K |
| Illinois Municipal Retirement Fund | Increased | 35.2K | 37.7K | +2.4K |
| Allspring Global Investments Holdings, LLC | Increased | 57.1K | 59.5K | +2.4K |
| HARBOR CAPITAL ADVISORS, INC. | Increased | 147.7K | 150.1K | +2.4K |
| Parkside Financial Bank & Trust | Reduced | 2.3K | 146 | -2.2K |
| Sterling Capital Management LLC | Increased | 255 | 2.4K | +2.2K |
| NISA INVESTMENT ADVISORS, LLC | Increased | 2.5K | 4.5K | +1.9K |
| TRUIST FINANCIAL CORP | Reduced | 138.3K | 136.4K | -1.9K |
| State of Wyoming | Sold Out | 1.5K | 0 | -1.5K |
| FIFTH THIRD BANCORP | Reduced | 16.8K | 15.7K | -1.2K |
| Thrivent Financial for Lutherans | Reduced | 47.3K | 46.2K | -1.1K |
| Farther Finance Advisors, LLC | Reduced | 2.3K | 1.3K | -948 |
| PARK AVENUE SECURITIES LLC | Increased | 13.4K | 14.2K | +800 |
| FIRST HORIZON CORP | New | 0 | 700 | +700 |
| Louisiana State Employees Retirement System | Reduced | 31.6K | 30.9K | -700 |
| YOUSIF CAPITAL MANAGEMENT, LLC | Reduced | 19.1K | 18.4K | -646 |
| Parallel Advisors, LLC | Reduced | 1.1K | 462 | -600 |
| AMALGAMATED BANK | Reduced | 19.3K | 18.8K | -530 |
| Pinnacle Wealth Planning Services, Inc. | Increased | 409 | 885 | +476 |
| SIGNATUREFD, LLC | Reduced | 2.2K | 1.7K | -472 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.