13F reference period
Q2 2026
Security Snapshot
A10 Networks, Inc. - Common Stock (ATEN) Institutional Ownership
CUSIP: 002121101
13F Institutional Holders and Ownership History from Q1 2014 to Q3 2026
Institutions Reporting
309
Shares (Excl. Options)
76.53M
Full value: 76,532,036 · shares · 30 Jun 2026Price
$37.36
The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.
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- Security type / class
- Equity / Common Stock
- Symbol
- ATEN on NYSE
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 76,532,036
- Total 13F value
- $2,858,234,823
- Portfolio coverage rank
- 0%
- Share change
- +4,147,900
- Value change
- +$184,446,519
- Number of holders
- 309
- Shares outstanding
- 72,713,301
- SEC-reported price per share
- $27.11
- Insider filing price
- $27.11
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- ATEN - A10 Networks, Inc. - Common Stock is tracked under CUSIP 002121101.
- 309 institutions reported positions in Q2 2026.
- 4 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 262 to 309 between Q1 2026 and Q2 2026.
- SEC-reported value moved from to
$1.67B
Full value: $1,671,918,508 · USD · 31 Mar 2026.$2.86B
Full value: $2,858,234,823 · USD · 30 Jun 2026
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 309 institutions filings for Q2 2026.
Security key
002121101
13F reference period
Q2 2026
13F holders
309
13D/G owners
4
CIK / CUSIP context first
Open Q2 2026 holders
ATEN full holder history
A10 Networks, Inc. SEC filings
A10 Networks, Inc. company facts
A10 Networks, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 002121101:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
4
Security
ATEN
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| FIRST TRUST PORTFOLIOS LP | 6.7% | $179,673,991 | 4,809,261 | First Trust Portfolios L.P. | 30 Jun 2026 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.2% | $102,702,521 | 3,788,363 | Vanguard Portfolio Management | 30 Sep 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5% | -2% | $98,261,252 | -$752,845 | 3,624,539 | -0.76% | Vanguard Capital Management | 30 Sep 2026 |
| Legal & General Investment Management Ltd | 3.1% | $46,550,093 | 2,405,702 | Legal & General Group Plc | 31 Dec 2021 |
As of 30 Jun 2026,
309
institutional investors reported holding
shares of
A10 Networks, Inc. - Common Stock (ATEN).
This represents
105%
of the company’s total
outstanding shares.
76.53M
Full value: 76,532,036 · shares · 30 Jun 202672.71M
Full value: 72,713,301 · shares · Stored outstanding share count13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
75%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 19% | 13,568,496 | +3.7% | 0.01% | $506,918,999 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4.8% | 3,462,058 | +2.2% | 0.01% | $129,342,487 |
| FIRST TRUST ADVISORS LP | 4.5% | 3,244,739 | +89% | 0.07% | $121,223,449 |
| STATE STREET CORP | 4.2% | 3,082,631 | -0.24% | 0% | $115,167,094 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.2% | 3,071,071 | -1.6% | 0% | $114,735,213 |
| Penserra Capital Management LLC | 4.2% | 3,068,045 | -15% | 0.88% | $114,621,000 |
| Boston Trust Walden Corp | 3.3% | 2,416,808 | +11% | 0.69% | $90,291,947 |
| WELLINGTON MANAGEMENT GROUP LLP | 2.7% | 1,959,853 | -5.5% | 0.01% | $73,220,107 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.5% | 1,813,638 | +5.6% | 0% | $67,771,453 |
| GOLDMAN SACHS GROUP INC | 2.5% | 1,784,946 | +50% | 0.01% | $66,685,570 |
| DIMENSIONAL FUND ADVISORS LP | 2.2% | 1,599,129 | -2.3% | 0.01% | $59,740,024 |
| RENAISSANCE TECHNOLOGIES LLC | 2.1% | 1,520,287 | -15% | 0.08% | $56,797,922 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2% | 1,437,650 | -4% | 0.02% | $53,710,604 |
| FMR LLC | 2% | 1,433,878 | +5002% | 0% | $53,569,672 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 2% | 1,426,608 | -8.3% | 0.06% | $53,274,522 |
| Invesco Ltd. | 1.7% | 1,243,053 | +243% | 0% | $46,440,461 |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. | 1.6% | 1,188,747 | -19% | 2.2% | $44,411,605 |
| TWO SIGMA INVESTMENTS, LP | 1.5% | 1,124,963 | -15% | 0.03% | $42,028,618 |
| PRUDENTIAL FINANCIAL INC | 1.4% | 1,048,320 | +18% | 0.04% | $39,165,235 |
| BARCLAYS PLC | 1.3% | 962,382 | -49% | 0.01% | $35,954,591 |
| MORGAN STANLEY | 1.2% | 908,082 | +12% | 0% | $33,925,979 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.2% | 896,517 | 0.05% | $33,494,000 | |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.2% | 894,398 | -17% | 0% | $33,416,000 |
| LOOMIS SAYLES & CO L P | 1.2% | 884,023 | 0.04% | $33,027,099 | |
| Boston Partners | 1.1% | 802,469 | -1.6% | 0.03% | $30,016,792 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
51
Headline period
Q2 2026
Rows shown
1-25 of 51
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 12,160,543 | $330,281,151 | +$36,993,905 | $27.11 | 100 |
| 2026 Q2 | 76,532,036 | $2,858,234,823 | +$184,446,519 | $37.36 | 309 |
| 2026 Q1 | 72,324,617 | $1,671,918,508 | +$58,028,253 | $23.12 | 262 |
| 2025 Q4 | 70,281,999 | $1,243,378,521 | -$9,201,116 | $17.69 | 241 |
| 2025 Q3 | 70,175,328 | $1,273,706,190 | -$5,933,480 | $18.15 | 235 |
| 2025 Q2 | 70,356,781 | $1,361,399,966 | +$12,807,261 | $19.35 | 228 |
| 2025 Q1 | 70,069,030 | $1,145,010,285 | +$74,061,719 | $16.34 | 250 |
| 2024 Q4 | 65,023,933 | $1,196,430,987 | +$1,517,140 | $18.40 | 217 |
| 2024 Q3 | 65,329,932 | $943,377,304 | -$22,895,903 | $14.44 | 205 |
| 2024 Q2 | 66,605,248 | $922,442,459 | -$45,022,565 | $13.85 | 216 |
| 2024 Q1 | 67,636,871 | $928,770,250 | +$160,707 | $13.69 | 181 |
| 2023 Q4 | 67,701,244 | $891,612,240 | +$31,693,298 | $13.17 | 189 |
| 2023 Q3 | 65,322,589 | $981,799,095 | +$297,731 | $15.03 | 191 |
| 2023 Q2 | 65,353,425 | $953,578,596 | +$32,328,411 | $14.59 | 195 |
| 2023 Q1 | 63,529,814 | $984,023,416 | -$39,311,216 | $15.49 | 214 |
| 2022 Q4 | 65,905,004 | $1,095,968,396 | +$15,993,327 | $16.63 | 220 |
| 2022 Q3 | 65,180,756 | $864,946,691 | -$62,771,185 | $13.27 | 186 |
| 2022 Q2 | 68,739,787 | $988,224,155 | +$89,098,269 | $14.38 | 194 |
| 2022 Q1 | 63,381,238 | $884,250,577 | -$16,566,449 | $13.95 | 189 |
| 2021 Q4 | 64,752,279 | $1,072,853,997 | -$50,652,948 | $16.58 | 174 |
| 2021 Q3 | 67,225,746 | $905,996,390 | +$14,969,942 | $13.48 | 149 |
| 2021 Q2 | 66,068,645 | $744,229,727 | +$6,894,407 | $11.26 | 132 |
| 2021 Q1 | 65,708,350 | $630,499,637 | +$28,739,618 | $9.61 | 133 |
| 2020 Q4 | 62,784,683 | $618,930,554 | +$35,638,570 | $9.86 | 144 |
| 2020 Q3 | 60,024,202 | $382,700,781 | +$17,450,035 | $6.37 | 141 |