The SEC lists A10 Networks, Inc. under CIK 0001580808, in computer communications equipment. We track it alongside the rest of the Information Technology sector.
ATEN Form 4 activity by transaction type, last 90 days
Form 4 transaction type
Transactions
Shares
Total value
Open-market sale
2
16,738
$460K
Grant or award
1
7,981
Tax withholding / forfeiture
1
1,743
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
ATEN insider transactions (Form 4)
62
46 Form 4 filings on record, the earliest from Nov 13, 2024, newest first. Filing history page 1 of 2.
Footnote F1 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a September 30, 2025 restricted stock unit grant that vested on October 5, 2026.
Footnote F1 (shares): Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (10/5/2026), provided that the Reporting Person continues to serve through each vesting date.
Footnote F1 (shares): The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 15, 2026.
Footnote F1 (shares): The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 9, 2026.
Footnote F2 (price): This is the weighted average price of the shares sold, which ranged from $27.55 to $28.46 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at… Full note on SEC EDGAR
Footnote F1 (shares): Shares withheld, on a non-discretionary basis, for tax purposes related to a July 1, 2022 restricted stock unit grant that vested on July 5, 2026.
Footnote F1 (shares): Performance-Based Restricted Stock Units that were previously reported on February 13, 2026, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average… Full note on SEC EDGAR
Footnote F2 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a Feburary 12, 2026 performance-based restricted stock unit grant that vested on May 14, 2026.
Footnote F1 (shares): Performance-Based Restricted Stock Units that were previously reported on February 13, 2026, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average… Full note on SEC EDGAR
Footnote F3 (shares): Performance-Based Restricted Stock Units were previously reported on February 10, 2025, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing… Full note on SEC EDGAR
Footnote F4 (shares): Includes 16,130 shares and 16,728 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a February 6, 2025 performance-based restricted stock unit grant and a February 12, 2026 performance-based restricted stock unit grant, respectively, each… Full note on SEC EDGAR
Footnote F1 (shares): Performance-Based Restricted Stock Units that were previously reported on February 13, 2026, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average… Full note on SEC EDGAR
Footnote F2 (shares): Performance-Based Restricted Stock Units were previously reported on February 10, 2025, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing… Full note on SEC EDGAR
Footnote F3 (shares): Includes 987 shares and 943 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a February 6, 2025 performance-based restricted stock unit grant and a February 12, 2026 performance-based restricted stock unit grant, respectively, each that… Full note on SEC EDGAR
Footnote F1 (price): This is the weighted average price of the shares sold, which ranged from $26.88 to $27.41 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at… Full note on SEC EDGAR
Footnote F1 (shares): Performance-Based Restricted Stock Units were previously reported on February 10, 2025, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing… Full note on SEC EDGAR
Footnote F2 (shares): Performance-Based Restricted Stock Units that were previously reported on February 13, 2026, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average… Full note on SEC EDGAR
Footnote F3 (shares): Includes 16,130 shares and 16,728 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a February 6, 2025 performance-based restricted stock unit grant and a February 12, 2026 performance-based restricted stock unit grant, respectively, each… Full note on SEC EDGAR
Footnote F1 (shares): Performance-Based Restricted Stock Units were previously reported on February 10, 2025, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing… Full note on SEC EDGAR
Footnote F2 (shares): Performance-Based Restricted Stock Units that were previously reported on February 13, 2026, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average… Full note on SEC EDGAR
Footnote F3 (shares): Includes 987 shares and 943 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a February 6, 2025 performance-based restricted stock unit grant and a February 12, 2026 performance-based restricted stock unit grant, respectively, each that… Full note on SEC EDGAR
Footnote F1 (shares): Performance-Based Restricted Stock Units were previously reported on October 2, 2025, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of a specified level of the volume weighted average closing… Full note on SEC EDGAR
Footnote F2 (shares): Performance-Based Restricted Stock Units that were previously reported on February 13, 2026, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average… Full note on SEC EDGAR
Footnote F3 (shares): Includes 2,458 shares and 536 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a September 30, 2025 performance-based restricted stock unit grant and a February 12, 2026 performance-based restricted stock unit grant, respectively, each… Full note on SEC EDGAR
Footnote F1 (shares): Represents restricted stock units granted to Mr. Chung as part of the director compensation program. The restricted stock units will vest on the earlier of April 22, 2027, or the date of the Issuer's next Annual Meeting, and will settle solely by delivery of an equal number of… Full note on SEC EDGAR
Footnote F1 (shares): Each share is represented by a Restricted Stock Unit ("RSU"). The RSUs will vest on the earlier of April 22, 2027 or the date of the Issuer's next Annual Meeting, provided that the Reporting Person continues to serve through each such vesting date.
Footnote F1 (shares): Each share is represented by a Restricted Stock Unit ("RSU"). The RSUs will vest on the earlier of April 22, 2027 or the date of the Issuer's next Annual Meeting, provided that the Reporting Person continues to serve through each such vesting date.
Footnote F1 (shares): Each share is represented by a Restricted Stock Unit ("RSU"). The RSUs will vest on the earlier of April 22, 2027 or the date of the Issuer's next Annual Meeting, provided that the Reporting Person continues to serve through each such vesting date.
Footnote F1 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on February 21, 2023, which vested on February 28, 2026.
Footnote F1 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on February 21, 2023, which vested on February 28, 2026.
Footnote F1 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on January 25, 2022, which vested on February 24, 2026.
Footnote F1 (shares): The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2025.
Footnote F2 (price): This is the weighted average price of the shares sold, which ranged from $20.51 to $21.10 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at… Full note on SEC EDGAR
Footnote F3 (price): This is the weighted average price of the shares sold, which ranged from $20.18 to $21.11 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at… Full note on SEC EDGAR
Footnote F4 (shares): Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (2/1/2026), provided that the Reporting Person continues to serve through each such vesting… Full note on SEC EDGAR
Footnote F5 (price): This is the weighted average price of the shares sold, which ranged from $20.23 to $20.72 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at… Full note on SEC EDGAR
Footnote F1 (shares): Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (2/1/2026), provided that the Reporting Person continues to serve through each such vesting… Full note on SEC EDGAR
Footnote F1 (shares): Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (2/1/2026), provided that the Reporting Person continues to serve through each such vesting… Full note on SEC EDGAR
Footnote F1 (shares): Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (2/1/2026), provided that the Reporting Person continues to serve through each such vesting… Full note on SEC EDGAR
Footnote F1 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on January 25, 2022, which vested on February 10, 2026.
Footnote F1 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on July, 1 2022, which vested on February 10, 2026.
Footnote F1 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on February 21, 2023, which vested on January 31, 2026.
Footnote F2 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to restricted stock units granted on February 21, 2023, January 30, 2024 and February 6, 2025, each of which vested on February 1, 2026.
Footnote F1 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on February 21, 2023, which vested on January 31, 2026.
Footnote F2 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to restricted stock units granted on February 21, 2023, January 30, 2024 and February 6, 2025, each of which vested on February 1, 2026.
Footnote F1 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a January 30, 2024 performance restricted stock unit grant that vested on January 15, 2026.
Footnote F1 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a January 30, 2024 performance restricted stock unit grant that vested on January 15, 2026.
Footnote F1 (shares): Represents a bona fide gift by Reporting Person to a tax-exempt public charity under Section 501(c)(3) of the Internal Revenue Code.
Footnote F3 (shares): Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a January 30, 2024 restricted stock unit grant that vested on December 13, 2025.
An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
A10 Networks, Inc. (ATEN) had 4 insider filings in the last 90 days, with the most recent on 2026-10-07. The full record for ATEN runs to 46 Form 4 filings, the earliest from 2024-11-13. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying ATEN stock?
No insider purchases of ATEN were filed in the last 90 days.
How many insiders are selling ATEN stock?
2 insider sales of ATEN were filed in the last 90 days, totaling $460K.
Where can I see ATEN SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects ATEN Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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