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ATEN · A10 Networks, Inc.

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Market Cap
$1.84B
Shares
72.61M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 314
Total Value: $2,884,526,787
Total Shares: 77,165,555
Showing 1–100 of 319 holdings by value · page 1 of 4

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 314 13F filers · Δ vs Mar 31, 2026
Top Holder
17.6%
Sep 2023 → Jun 2026 · range 17.6% – 20.9%
−0.4 pts
Top 5
34.2%
Sep 2023 → Jun 2026 · range 34.2% – 50.5%
−1.9 pts
Top 10
48.5%
Sep 2023 → Jun 2026 · range 48.5% – 64.2%
−0.9 pts
HHI
469
Sep 2023 → Jun 2026 · range 469 – 710
Broadly held−24

Quarterly Activity

vs Mar 31, 2026
New
80
Increased
91
Decreased
101
Sold Out
33
Unchanged
42
Holder count: +47
Institutional value: +71.7%
Shares held: +6.2%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 319
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1580808 CUSIP 002121101 13F (30d) 248 filings 241 filers Visit website Investor relations