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[Form 4] A10 Networks, Inc. Insider Trading Activity

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
4

A10 Networks (ATEN) Chief Financial Officer Michelle Caron reported grants dated 09/30/2025 totaling 13,706 shares in two award types: restricted stock units and performance-based restricted stock units. The restricted stock units vest in four equal annual installments starting on the vesting commencement date of 10/05/2025, provided continued service. The performance-based RSUs (PSUs) each represent a contingent right to one share and vest only if a specified volume-weighted average closing price milestone is achieved during any 100-day period between 09/30/2025 and 09/30/2029, then subject to continued employment with vesting in three installments: 50% within 30 days of milestone achievement and two additional 25% installments on the first and second anniversaries of achievement. The Form 4 was signed by an attorney-in-fact on 10/02/2025.

A10 Networks (ATEN) Chief Financial Officer Michelle Caron ha riportato grant datati 30/09/2025 per un totale di 13.706 azioni in due tipologie di premi: unità di azioni limitate vincolate (RSU) e RSU basate sulle prestazioni. Le RSU vincolate maturano in quattro rate annuali uguali a partire dalla data di inizio della vesting del 05/10/2025, previa continuazione del rapporto di lavoro. Le RSU basate sulle prestazioni (PSU) rappresentano ciascuna un diritto condizionale a una azione e maturano solo se viene raggiunta una certa soglia di prezzo medio di chiusura ponderata per volume durante un periodo di 100 giorni tra 30/09/2025 e 30/09/2029, quindi soggette a impiego continuato con maturazione in tre tranche: 50% entro 30 giorni dal raggiungimento della soglia e altre due tranche del 25% rispettivamente al primo e al secondo anniversario del raggiungimento. Il Form 4 è stato firmato da un procuratore in forza il 02/10/2025.

A10 Networks (ATEN) Directora financiera Michelle Caron reportó otorgamientos con fecha 30/09/2025 por un total de 13.706 acciones en dos tipos de premios: unidades de acciones restringidas y unidades de acciones restringidas basadas en desempeño. Las RSU restringidas se consolidan en cuatro cuotas anuales iguales a partir de la fecha de inicio de la vesting el 05/10/2025, siempre que continúe la relación laboral. Las RSU basadas en desempeño (PSU) representan cada una un derecho contingente a una acción y solo se consolidan si se alcanza un hito de precio medio ponderado por volumen durante cualquier periodo de 100 días entre 30/09/2025 y 30/09/2029, luego están condicionadas al empleo continuo con vesting en tres cuotas: 50% dentro de los 30 días siguientes a la consecución del hito y dos cuotas adicionales del 25% en el primer y segundo aniversario de la consecución. El Form 4 fue firmado por un apoderado en 02/10/2025.

A10 Networks (ATEN) 재무 최고책임자(CFO) Michelle Caron2025년 9월 30일로 날짜가 기재된 보조금이 총 13,706주에 대해 두 가지 수여 형태로 보고했습니다: 제한 주식 단위(RSU)와 성과 기반 제한 주식 단위(PSU). 제한 주식 단위는 4회의 동일한 연간 분할로 vesting되며 시작일은 2025년 10월 5일이고 계속 고용이 전제됩니다. 성과 기반 PSU는 각각 한 주식에 대한 조건부 권리를 나타내며, 2025년 9월 30일에서 2029년 9월 30일 사이의 100일 기간 동안 볼륨 가중 평균 종가 지표를 달성해야만 vesting이 발생하고, 고용 유지하에 3회로 분할 vesting됩니다: 달성 시점 30일 이내 50%, 달성의 첫 해와 두 번째 기념일에 각각 25%씩. Form 4는 대리인에 의해 2025년 10월 2일에 서명되었습니다.

A10 Networks (ATEN) Directeur financier Michelle Caron a reporté des attributions datées du 30/09/2025 totalisant 13 706 actions réparties en deux types de primes : des unités d’actions restreintes et des unités d’actions restreintes basées sur la performance. Les RSU restreintes se vestent en quatre versements annuels égaux à partir de la date de commencement de la vesting le 05/10/2025, sous réserve de la poursuite de l’emploi. Les RSU basées sur la performance (PSU) représentent chacune un droit conditionnel à une action et se vestent uniquement si un jalon du prix de clôture moyen pondéré par le volume est atteint pendant toute période de 100 jours entre le 30/09/2025 et le 30/09/2029, puis, sous réserve de l’emploi continu, se vestent en trois versements : 50% dans les 30 jours suivant l’atteinte du jalon et deux versements supplémentaires de 25% au premier et au deuxième anniversaire de l’atteinte. Le Form 4 a été signé par un mandataire le 02/10/2025.

A10 Networks (ATEN) Chief Financial Officer Michelle Caron meldete Zuschüsse mit dem Datum 30.09.2025 in zwei Award-Typen: Restricted Stock Units und leistungsbasierte Restricted Stock Units. Die Restricted Stock Units (RSU) vesten in vier gleichen jährlichen Raten ab dem Vesting-Beginn am 05.10.2025 bei fortbestehendem Arbeitsverhältnis. Die leistungsbasierten RSUs (PSU) stellen jeweils ein bedingtes Recht auf eine Aktie dar und vesten nur, wenn während eines beliebigen 100-Tage-Zeitraums zwischen dem 30.09.2025 und dem 30.09.2029 eine bestimmte volumengewichtete durchschnittliche Schlusskurs-Hürde erreicht wird; danach erfolgt die Vesting-Bildung bei fortbestehendem Anstellungsverhältnis in drei Tranchen: 50% innerhalb von 30 Tagen nach Erreichung der Hürde und zwei weitere Tranchen von 25% an dem ersten und zweiten Jahrestag der Erreichung. Das Form 4 wurde von Bevollmächtigtem am 02.10.2025 unterschrieben.

A10 Networks (ATEN) المدير المالي ميشل كارون أفادت بمنح بتاريخ 30/09/2025 بإجمالي 13,706 أسهم موزعة على نوعين من الجوائز: وحدات الأسهم المقيدة (RSU) ووحدات الأسهم المقيدة القائمة على الأداء (PSU). تتقيد RSU المقيدة بتسوية على أربع دفعات سنوية متساوية ابتداءً من تاريخ بدء الاستحقاق 05/10/2025 بشرط الاستمرار في العمل. تمثل PSU القائمة على الأداء حقاً شرطياً في سهم واحد لكل وحدة وتتحقق vesting فقط إذا تم الوصول إلى عتبة سعر الإغلاق المتوسط المرجح بالحجم خلال أي فترة 100 يوم بين 30/09/2025 و 30/09/2029، ثم تظل مرتبطة بالاستمرار في العمل مع vesting في ثلاث دفعات: 50% خلال 30 يوماً من تحقيق العتبة ودفعتان إضافيتان من 25% في الأول والثاني من anniversaries للإنجاز. تم توقيع Form 4 بواسطة وكيل نيابة في 02/10/2025.

A10 Networks (ATEN) 首席财务官 Michelle Caron 报告称,日期为 2025/09/30 的授予共计 13,706 股,分为两种类型:受限股票单位(RSU)和基于业绩的受限股票单位(PSU)。受限股票单位在四个等额年度分期归属,起始归属日期为 2025/10/05,前提为持续任职。基于业绩的 RSU(PSU)每单位代表一个或有权利,只有在在 100 天期内任何一个周期中达到按成交量加权的收盘价里程碑时才归属,且在持续雇佣的前提下,分三期归属:在达到里程碑后 30 天内归属 50%;之后的第一和第二周年各归属 25%。Form 4 已由代理律师于 2025/10/02 签署。

Positive
  • Grant of 13,706 restricted stock units with clear annual vesting schedule beginning 10/05/2025
  • Grant of 13,706 performance-based RSUs that vest only upon a defined VWAP performance milestone measured through 09/30/2029
Negative
  • None.

Insights

TL;DR: CFO received time-based RSUs and performance-based PSUs totaling 13,706 awards on 09/30/2025.

The filing shows a grant of 13,706 restricted stock units that vest one-quarter annually beginning 10/05/2025, linking a portion of pay to continued service.

The filing also discloses 13,706 performance-based restricted stock units tied to a specified VWAP milestone measured over any 100-day window between 09/30/2025 and 09/30/2029; vesting of earned PSUs occurs in 50%/25%/25% installments after the milestone and subject to continued employment.

A10 Networks (ATEN) Chief Financial Officer Michelle Caron ha riportato grant datati 30/09/2025 per un totale di 13.706 azioni in due tipologie di premi: unità di azioni limitate vincolate (RSU) e RSU basate sulle prestazioni. Le RSU vincolate maturano in quattro rate annuali uguali a partire dalla data di inizio della vesting del 05/10/2025, previa continuazione del rapporto di lavoro. Le RSU basate sulle prestazioni (PSU) rappresentano ciascuna un diritto condizionale a una azione e maturano solo se viene raggiunta una certa soglia di prezzo medio di chiusura ponderata per volume durante un periodo di 100 giorni tra 30/09/2025 e 30/09/2029, quindi soggette a impiego continuato con maturazione in tre tranche: 50% entro 30 giorni dal raggiungimento della soglia e altre due tranche del 25% rispettivamente al primo e al secondo anniversario del raggiungimento. Il Form 4 è stato firmato da un procuratore in forza il 02/10/2025.

A10 Networks (ATEN) Directora financiera Michelle Caron reportó otorgamientos con fecha 30/09/2025 por un total de 13.706 acciones en dos tipos de premios: unidades de acciones restringidas y unidades de acciones restringidas basadas en desempeño. Las RSU restringidas se consolidan en cuatro cuotas anuales iguales a partir de la fecha de inicio de la vesting el 05/10/2025, siempre que continúe la relación laboral. Las RSU basadas en desempeño (PSU) representan cada una un derecho contingente a una acción y solo se consolidan si se alcanza un hito de precio medio ponderado por volumen durante cualquier periodo de 100 días entre 30/09/2025 y 30/09/2029, luego están condicionadas al empleo continuo con vesting en tres cuotas: 50% dentro de los 30 días siguientes a la consecución del hito y dos cuotas adicionales del 25% en el primer y segundo aniversario de la consecución. El Form 4 fue firmado por un apoderado en 02/10/2025.

A10 Networks (ATEN) 재무 최고책임자(CFO) Michelle Caron2025년 9월 30일로 날짜가 기재된 보조금이 총 13,706주에 대해 두 가지 수여 형태로 보고했습니다: 제한 주식 단위(RSU)와 성과 기반 제한 주식 단위(PSU). 제한 주식 단위는 4회의 동일한 연간 분할로 vesting되며 시작일은 2025년 10월 5일이고 계속 고용이 전제됩니다. 성과 기반 PSU는 각각 한 주식에 대한 조건부 권리를 나타내며, 2025년 9월 30일에서 2029년 9월 30일 사이의 100일 기간 동안 볼륨 가중 평균 종가 지표를 달성해야만 vesting이 발생하고, 고용 유지하에 3회로 분할 vesting됩니다: 달성 시점 30일 이내 50%, 달성의 첫 해와 두 번째 기념일에 각각 25%씩. Form 4는 대리인에 의해 2025년 10월 2일에 서명되었습니다.

A10 Networks (ATEN) Directeur financier Michelle Caron a reporté des attributions datées du 30/09/2025 totalisant 13 706 actions réparties en deux types de primes : des unités d’actions restreintes et des unités d’actions restreintes basées sur la performance. Les RSU restreintes se vestent en quatre versements annuels égaux à partir de la date de commencement de la vesting le 05/10/2025, sous réserve de la poursuite de l’emploi. Les RSU basées sur la performance (PSU) représentent chacune un droit conditionnel à une action et se vestent uniquement si un jalon du prix de clôture moyen pondéré par le volume est atteint pendant toute période de 100 jours entre le 30/09/2025 et le 30/09/2029, puis, sous réserve de l’emploi continu, se vestent en trois versements : 50% dans les 30 jours suivant l’atteinte du jalon et deux versements supplémentaires de 25% au premier et au deuxième anniversaire de l’atteinte. Le Form 4 a été signé par un mandataire le 02/10/2025.

A10 Networks (ATEN) Chief Financial Officer Michelle Caron meldete Zuschüsse mit dem Datum 30.09.2025 in zwei Award-Typen: Restricted Stock Units und leistungsbasierte Restricted Stock Units. Die Restricted Stock Units (RSU) vesten in vier gleichen jährlichen Raten ab dem Vesting-Beginn am 05.10.2025 bei fortbestehendem Arbeitsverhältnis. Die leistungsbasierten RSUs (PSU) stellen jeweils ein bedingtes Recht auf eine Aktie dar und vesten nur, wenn während eines beliebigen 100-Tage-Zeitraums zwischen dem 30.09.2025 und dem 30.09.2029 eine bestimmte volumengewichtete durchschnittliche Schlusskurs-Hürde erreicht wird; danach erfolgt die Vesting-Bildung bei fortbestehendem Anstellungsverhältnis in drei Tranchen: 50% innerhalb von 30 Tagen nach Erreichung der Hürde und zwei weitere Tranchen von 25% an dem ersten und zweiten Jahrestag der Erreichung. Das Form 4 wurde von Bevollmächtigtem am 02.10.2025 unterschrieben.

SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
Caron Michelle Elizabeth

(Last) (First) (Middle)
2300 ORCHARD PARKWAY

(Street)
SAN JOSE CA 95131

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
A10 Networks, Inc. [ ATEN ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
Chief Financial Officer
3. Date of Earliest Transaction (Month/Day/Year)
09/30/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 09/30/2025 A 13,706(1) A $0 13,706 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Performance-based Restricted Stock Units (2) 09/30/2025 A 13,706 (3) 09/30/2029 Common Stock 13,706 $0 13,706 D
Explanation of Responses:
1. Each share is represented by a Restricted Stock Unit ("RSU"). One-fourth (1/4) of the total RSUs will vest on each of the first four (4) anniversaries of the Vesting Commencement Date (10/5/2025), provided that the Reporting Person continues to serve through each vesting date.
2. Each share is represented by a Performance-based Restricted Stock Unit ("PSU").
3. Grant of 13,706 PSUs, 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 prices of a share of ATEN common stock during any one hundred (100) day period between September 30, 2025 and September 30, 2029 (the "Performance Milestone"). Upon achievement of the Performance Milestone, vesting is subject to continued employment with the Company through the applicable vesting date, which occurs in three installments, with the vesting of the first fifty percent (50%) to occur within thirty (30) days of achievement of the Performance Milestone and an additional twenty-five percent (25%) on each of the first and second anniversaries of the date of achievement of the Performance Milestone.
Remarks:
/s/ Jill Osato, as Attorney-in-Fact 10/02/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did the ATEN Form 4 filed for Michelle Caron report?

The Form 4 reports grants dated 09/30/2025 of 13,706 restricted stock units and 13,706 performance-based RSUs to CFO Michelle Caron.

When do the restricted stock units for ATEN vest?

The RSUs vest in four equal annual installments beginning on the vesting commencement date of 10/05/2025, subject to continued service.

What performance period applies to the ATEN PSUs?

The PSUs require achievement of a specified VWAP milestone during any 100-day period between 09/30/2025 and 09/30/2029.

How do PSUs vest after the performance milestone is achieved?

Upon milestone achievement, vesting occurs in three installments: 50% within 30 days of achievement, then 25% on each of the first and second anniversaries, subject to continued employment.

Who signed the Form 4 and when was it signed?

The Form 4 was signed by Jill Osato, as Attorney-in-Fact on 10/02/2025.
A10 Networks Inc

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