Who owns A10 Networks, Inc.?
Institutional ownership of ATEN from SEC Form 13F filings across 203 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
203
13F holders
$2.04B
value, 2026 filers
82.3%
of shares outstanding (59.3M sh)
48
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of ATEN's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 13.6M | $506.9M | 0.0% | 18.8% | +3.7% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | 3.5M | $129.3M | 0.0% | 4.8% | +2.2% |
| 3 | FIRST TRUST ADVISORS LP | 3.2M | $121.2M | 0.1% | 4.5% | +88.7% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 3.1M | $114.7M | 0.0% | 4.3% | -50.8% |
| 5 | Penserra Capital Management LLC | 3.1M | $114,621 | 0.9% | 4.3% | -14.6% |
| 6 | WELLINGTON MANAGEMENT GROUP LLP | 2.0M | $73.2M | 0.0% | 2.7% | -5.5% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 1.8M | $67.8M | 0.0% | 2.5% | +5.6% |
| 8 | GOLDMAN SACHS GROUP INC | 1.8M | $66.7M | 0.0% | 2.5% | +50.4% |
| 9 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.4M | $53.7M | 0.0% | 2% | -4.0% |
| 10 | FMR LLC | 1.4M | $53.6M | 0.0% | 2% | +5001.7% |
| 11 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 1.4M | $53.3M | 0.1% | 2% | -8.3% |
| 12 | Invesco Ltd. | 1.2M | $46.4M | 0.0% | 1.7% | +242.7% |
| 13 | TWO SIGMA INVESTMENTS, LP | 1.1M | $42.0M | 0.0% | 1.6% | -14.8% |
| 14 | PRUDENTIAL FINANCIAL INC | 1.0M | $39.2M | 0.0% | 1.5% | +18.4% |
| 15 | BARCLAYS PLC | 962,382 | $36.0M | 0.0% | 1.3% | -48.7% |
| 16 | MORGAN STANLEY | 908,083 | $33.9M | 0.0% | 1.3% | +11.7% |
| 17 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC.NEW | 896,517 | $33.5M | 0.1% | 1.2% | new |
| 18 | PRICE T ROWE ASSOCIATES INC /MD/ | 894,398 | $33,416 | 0.0% | 1.2% | -16.6% |
| 19 | Sixth Street Partners Management Company, L.P.NEW | 761,676 | $28.5M | 4.9% | 1.1% | new |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 761,676 | $28.5M | 0.0% | 1.1% | +2.4% |
| 21 | NORTHERN TRUST CORP | 756,476 | $28.3M | 0.0% | 1.1% | +7.4% |
| 22 | UBS Group AG | 736,554 | $27.5M | 0.0% | 1% | +88.8% |
| 23 | Bank of New York Mellon Corp | 659,883 | $24.7M | 0.0% | 0.9% | -0.1% |
| 24 | BNP PARIBAS FINANCIAL MARKETS | 573,164 | $21.4M | 0.0% | 0.8% | +47.1% |
| 25 | D. E. Shaw & Co., Inc. | 547,577 | $20.5M | 0.0% | 0.8% | +107.9% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.