Latest Period
Q2 2026
Security Snapshot
A10 Networks, Inc. - Common (ATEN) Institutional Ownership
CUSIP: 002121101
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
308
Shares (Excl. Options)
76,503,930
Price
$37.36
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- Security type / class
- Equity / Common
- Symbol
- ATEN on NYSE
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 76,503,930
- Total 13F value
- $2,856,245,595
- Portfolio coverage rank
- 0%
- Share change
- +4,137,494
- Value change
- +$184,057,763
- Number of holders
- 308
- Shares outstanding
- 71,994,925
- SEC-reported price per share
- $36.43
- Insider filing price
- $36.43
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
Key facts
- ATEN - A10 Networks, Inc. - Common is tracked under CUSIP 002121101.
- 308 institutions reported positions in Q2 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 262 to 308 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $1,671,918,508 to $2,856,245,595.
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 308 institutions filings for Q2 2026.
Security key
002121101
Latest holder period
Q2 2026
13F holders
308
13D/G owners
3
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
3
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 CAPITAL MANAGEMENT LLC | 5.1% | $84,441,384 | 3,652,309 | Vanguard Capital Management | 31 Mar 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, 308 institutional investors reported holding 76,503,930 shares of A10 Networks, Inc. - Common (ATEN). This represents 106% of the company’s total 71,994,925 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
76%
| 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 | 4.3% | 3,082,631 | -0.24% | 0% | $115,167,094 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.3% | 3,071,071 | -1.6% | 0% | $114,735,213 |
| Penserra Capital Management LLC | 4.3% | 3,068,045 | -15% | 0.88% | $114,621,000 |
| Boston Trust Walden Corp | 3.4% | 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. | 1.7% | 1,188,747 | -19% | 2.2% | $44,411,605 |
| TWO SIGMA INVESTMENTS, LP | 1.6% | 1,124,963 | -15% | 0.03% | $42,028,618 |
| PRUDENTIAL FINANCIAL INC | 1.5% | 1,048,320 | +18% | 0.04% | $39,165,235 |
| BARCLAYS PLC | 1.3% | 962,382 | -49% | 0.01% | $35,954,591 |
| MORGAN STANLEY | 1.3% | 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
50
Latest
Q2 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 76,503,930 | $2,856,245,595 | +$184,057,763 | $37.36 | 308 |
| 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 |
| 2020 Q2 | 57,174,252 | $389,100,218 | +$21,932,393 | $6.81 | 125 |