Comparable stake leader
FIRST TRUST PORTFOLIOS LP
SEC ownership of A10 Networks, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001580808.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
11 Aug 2026
- Public ticker
- ATEN on NYSE
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
FIRST TRUST PORTFOLIOS LP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
FIRST TRUST PORTFOLIOS LP
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
11 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001580808
- Issuer location
- San Jose, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of A10 Networks, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
FIRST TRUST PORTFOLIOS LP
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
11 Aug 2026
13D/G
13F
3/4/5
Lead comparable stake: 6.7%
13D/G row: FIRST TRUST PORTFOLIOS LP
Showing 1-8 of 50 holder rows.
Quick read
FIRST TRUST PORTFOLIOS LP leads the comparable SEC ownership view at 6.7%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens FIRST TRUST PORTFOLIOS LP's linked filing trail.
Comparable ownership
Top 5
FIRST TRUST PORTFOLIOS LP
6.7%
VANGUARD CAPITAL MANAGEMENT LLC
5.1%
Legal & General Investment Manage...
3.1%
Dhrupad Trivedi
1.2%
Peter Y. Chung
0.29%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| FIRST TRUST PORTFOLIOS LP |
13D/G
First Trust Portfolios L.P.
|
6.7%
|
$179,673,991
4,809,261 shares
|
$0 | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Capital Management
|
5.1%
from 13D/G
|
$114,735,213
3,071,071 shares
|
— | 30 Jun 2026 |
| Legal & General Investment Management Ltd |
13D/G
Legal & General Group Plc
|
3.1%
|
$46,550,093
2,405,702 shares
|
$0 | 31 Dec 2021 |
| Dhrupad Trivedi |
3/4/5
Chief Executive Officer, Director
|
1.2%
|
$20,527,022
887,847 shares
|
-$2,060,000 | 15 May 2026 |
| Peter Y. Chung |
3/4/5
Director
|
0.29%
|
$4,792,729
207,298 shares
|
— | 22 Apr 2026 |
| Tor Braham |
3/4/5
Director
|
0.27%
|
$4,457,813
192,812 shares
|
— | 22 Apr 2026 |
| Brian Becker |
3/4/5
Chief Financial Officer
|
0.11%
|
$1,399,109
77,599 shares
|
— | 13 Aug 2025 |
| Robert Scott Weber |
3/4/5
General Counsel
|
0.07%
|
$1,409,325
50,586 shares
|
-$392,436 | 11 Aug 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$3,192,492.
Buys
$0
Insiders: 0
Sells
$3,192,492
Insiders: 4
Net
-$3,192,492
Shares: -141,436
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 141,436
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 16,738 | $0 | $460,460 | -$460,460 |
| 3-6 | 0 | 24,698 | $0 | $672,033 | -$672,033 |
| 6-9 | 0 | 100,000 | $0 | $2,060,000 | -$2,060,000 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-13 of 13 reporting-owner rows connected to A10 Networks, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
13
Largest Forms 3/4/5 holder
SUMMIT PARTNERS L P
Net 12M change
-$3,192,493
Latest report
25 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| SUMMIT PARTNERS L P | 10%+ Owner | $68,484,098 | Mixed | 08 Sep 2022 | ||
| Dhrupad Trivedi | Chief Executive Officer, Director | $20,527,022 | -$2,060,000 | -9.1% | Mixed | 15 May 2026 |
| Peter Y. Chung | Director | $4,792,729 | Mixed | 22 Apr 2026 | ||
| Tor Braham | Director | $4,457,813 | Mixed | 22 Apr 2026 | ||
| Robert D. Cochran | EVP Legal & Corp Collaboration | $4,374,286 | Mixed | 27 Jun 2022 | ||
| Eric Singer | Director | $3,003,764 | -$672,033 | -18% | Mixed | 05 May 2026 |
| Dana Elizabeth Wolf | Director | $2,089,739 | -$68,024 | -3.2% | Mixed | 25 Aug 2026 |
| Robert Scott Weber | General Counsel | $1,409,325 | -$392,436 | -22% | Filing P/S | 11 Aug 2026 |
| Brian Becker | Chief Financial Officer | $1,399,109 | Filing P/S | 13 Aug 2025 | ||
| Matthew P. Bruening | EVP, Worldwide Sales & Mktg | $1,084,252 | Mixed | 13 Nov 2023 | ||
| Michelle Elizabeth Caron | Chief Financial Officer | $823,395 | Mixed | 15 May 2026 | ||
| Sheen George Khoury | Executive VP, Sales and Mktg | $773,373 | Mixed | 12 Feb 2026 | ||
| Karen S. Thomas | EVP, Worldwide Sales and Mkt | $591,857 | Mixed | 26 Dec 2024 |
Recent insider transactions for A10 Networks, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Dana Elizabeth Wolf | ATEN | Common Stock | Sale | -4.42% | $68,024 | $25.65 | -2,652 | 57,409 | 25 Aug 2026 | Direct |
| Robert Scott Weber | ATEN | Common Stock | Sale | -21.8% | $392,436 | $27.86 | -14,086 | 50,586 | 11 Aug 2026 | Direct |
| Robert Scott Weber | ATEN | Common Stock | Tax liability | -2.85% | -1,897 | 64,672 | 06 Jul 2026 | Direct | ||
| Michelle Elizabeth Caron | ATEN | Common Stock | Tax liability | -2.09% | -760 | 35,614 | 15 May 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Tax liability | -3.57% | -32,858 | 887,847 | 15 May 2026 | Direct | ||
| Robert Scott Weber | ATEN | Common Stock | Tax liability | -2.86% | -1,930 | 65,527 | 15 May 2026 | Direct | ||
| Michelle Elizabeth Caron | ATEN | Common Stock | Tax liability | -2.06% | -748 | 35,626 | 15 May 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Tax liability | -3.57% | -32,858 | 887,847 | 15 May 2026 | Direct | ||
| Robert Scott Weber | ATEN | Common Stock | Tax liability | -2.86% | -1,930 | 65,527 | 15 May 2026 | Direct | ||
| Michelle Elizabeth Caron | ATEN | Common Stock | Options Exercise | 8.95% | 2,989 | 36,374 | 14 May 2026 | Direct | ||
| Michelle Elizabeth Caron | ATEN | Performance-based Restricted Stock Units | Options Exercise | -100% | -2,989 | 0 | 14 May 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Options Exercise | 16.3% | 129,164 | 920,705 | 14 May 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Performance-based Restricted Stock Units | Options Exercise | -100% | -129,164 | 0 | 14 May 2026 | Direct | ||
| Robert Scott Weber | ATEN | Common Stock | Options Exercise | 12.7% | 7,588 | 67,457 | 14 May 2026 | Direct | ||
| Robert Scott Weber | ATEN | Performance-based Restricted Stock Units | Options Exercise | -100% | -7,588 | 0 | 14 May 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Tax liability | -3.99% | -32,858 | 791,536 | 06 May 2026 | Direct | ||
| Robert Scott Weber | ATEN | Common Stock | Tax liability | -3.12% | -1,930 | 59,869 | 06 May 2026 | Direct | ||
| Michelle Elizabeth Caron | ATEN | Common Stock | Tax liability | -8.23% | -2,994 | 33,385 | 06 May 2026 | Direct | ||
| Eric Singer | ATEN | Common Stock | Sale | -26.4% | $672,033 | $27.21 | -24,698 | 68,806 | 05 May 2026 | Direct |
| Dhrupad Trivedi | ATEN | Common Stock | Options Exercise | 18.6% | 129,159 | 824,394 | 05 May 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Performance-based Restricted Stock Units | Options Exercise | -67.1% | -129,159 | 63,406 | 05 May 2026 | Direct | ||
| Robert Scott Weber | ATEN | Common Stock | Options Exercise | 14% | 7,589 | 61,799 | 05 May 2026 | Direct | ||
| Robert Scott Weber | ATEN | Performance-based Restricted Stock Units | Options Exercise | -67.2% | -7,589 | 3,706 | 05 May 2026 | Direct | ||
| Michelle Elizabeth Caron | ATEN | Common Stock | Options Exercise | 84.8% | 16,695 | 36,379 | 05 May 2026 | Direct | ||
| Michelle Elizabeth Caron | ATEN | Performance-based Restricted Stock Units | Options Exercise | -100% | -16,695 | 0 | 05 May 2026 | Direct | ||
| Peter Y. Chung | ATEN | Common Stock | Award | 3.62% | 7,233 | 207,298 | 22 Apr 2026 | See Remarks | ||
| Dana Elizabeth Wolf | ATEN | Common Stock | Award | 13.7% | 7,233 | 60,061 | 22 Apr 2026 | Direct | ||
| Eric Singer | ATEN | Common Stock | Award | 8.38% | 7,233 | 93,504 | 22 Apr 2026 | Direct | ||
| Tor Braham | ATEN | Common Stock | Award | 3.9% | 7,233 | 192,812 | 22 Apr 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Tax liability | -1.43% | -10,101 | 695,235 | 28 Feb 2026 | Direct | ||
| Robert Scott Weber | ATEN | Common Stock | Tax liability | -1.38% | -757 | 54,210 | 28 Feb 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Tax liability | -1.16% | -8,261 | 705,336 | 24 Feb 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Sale | -4.46% | $685,014 | $20.55 | -33,334 | 713,597 | 13 Feb 2026 | Direct |
| Dhrupad Trivedi | ATEN | Common Stock | Award | 21.4% | 131,516 | 746,931 | 12 Feb 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Sale | -5.14% | $685,326 | $20.56 | -33,333 | 615,415 | 12 Feb 2026 | Direct |
| Dhrupad Trivedi | ATEN | Performance-based Restricted Stock Units | Award | 131,516 | 131,516 | 12 Feb 2026 | Direct | |||
| Michelle Elizabeth Caron | ATEN | Common Stock | Award | 43.6% | 5,978 | 19,684 | 12 Feb 2026 | Direct | ||
| Michelle Elizabeth Caron | ATEN | Performance-based Restricted Stock Units | Award | 5,978 | 5,978 | 12 Feb 2026 | Direct | |||
| Robert Scott Weber | ATEN | Common Stock | Award | 15.6% | 7,413 | 54,967 | 12 Feb 2026 | Direct | ||
| Robert Scott Weber | ATEN | Performance-based Restricted Stock Units | Award | 7,413 | 7,413 | 12 Feb 2026 | Direct | |||
| Sheen George Khoury | ATEN | Common Stock | Award | 21.3% | 7,771 | 44,294 | 12 Feb 2026 | Direct | ||
| Sheen George Khoury | ATEN | Performance-based Restricted Stock Units | Award | 7,771 | 7,771 | 12 Feb 2026 | Direct | |||
| Dhrupad Trivedi | ATEN | Common Stock | Sale | -4.89% | $689,660 | $20.69 | -33,333 | 648,748 | 11 Feb 2026 | Direct |
| Dhrupad Trivedi | ATEN | Common Stock | Tax liability | -1.2% | -8,261 | 682,081 | 10 Feb 2026 | Direct | ||
| Robert Scott Weber | ATEN | Common Stock | Tax liability | -3.84% | -1,897 | 47,554 | 10 Feb 2026 | Direct | ||
| Robert Scott Weber | ATEN | Common Stock | Tax liability | -8.53% | -4,614 | 49,451 | 01 Feb 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Tax liability | -8.23% | -61,945 | 690,342 | 01 Feb 2026 | Direct | ||
| Robert Scott Weber | ATEN | Common Stock | Tax liability | -1.52% | -836 | 54,065 | 31 Jan 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Tax liability | -1.33% | -10,102 | 752,287 | 31 Jan 2026 | Direct | ||
| Dhrupad Trivedi | ATEN | Common Stock | Tax liability | -1.69% | -13,106 | 762,389 | 15 Jan 2026 | Direct |
* marks a reported price that did not pass the local price check.