organization · Reporting owner

VIEX Opportunities Fund, LP - Series Two

Disclosed activity across 2 companies

Tapewire entity: 126253
SEC CIK: 0001659404

Reported relationships

Latest disclosed role at each company.

Company	Last reported as	Report date	Published
A10 Networks, Inc.ATEN · Entity 4574	See Explanation of Responses	June 07, 2022	June 14, 2022

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

A10 Networks, Inc.

Report date June 07, 2022 · Filed June 14, 2022 · Amendment

Jointly reported with Singer Eric

Amendment: balances below belong to this corrected disclosure, not necessarily a complete replacement of earlier positions.

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common Stock, par value $0.00001SEC Table I · non-derivative	IndirectBy Viex Opportunities Fund, LP - Series Two	0	Reported balance After 2022-06-07 transaction · row 1 Amendment: may correct only part of an earlier disclosure. 1 source row Row 1 · 2022-06-07 · Sale · Disposed 13,036 · Balance 0 F4: Represents a weighted average price. These Shares were purchased in multiple transactions at prices ranging from $15.96 to $15.93. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares purchased at each separate price within the range set forth in this footnote. F1: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX GP, LLC ("VIEX GP"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F2: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or any other purpose. F3: Securities of the Issuer beneficially owned directly by Series Two. VIEX GP, as the general partner of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. VIEX Capital, as the investment manager of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. F5: On May 20, 2022, the Reporting Persons filed a Form 4 which inadvertently reported that Series Two beneficially owned 53,076 shares of Common Stock following the transactions reported therein when Series Two, in fact, beneficially owned 53,036 shares of Common Stock. Subsequent Form 4s filed by the Reporting Persons on May 26, 2022, and June 9, 2022 inadvertently reported an incorrect number of shares beneficially owned by Series Two following each transaction thereafter, and the Form 4 filed by the Reporting Persons on June 9, 2022 also inadvertently reported that Series Two sold 13,051 shares of Common Stock on June 7, 2022 and beneficially owned 25 shares of Common Stock thereafter. Accordingly, this amendment is being filed to report that Series Two, in fact, sold 13,036 shares of Common Stock on June 7, 2022 and beneficially owned 0 shares of Common Stock thereafter.

Filing footnotes · ownership attribution and instrument terms

F1: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX GP, LLC ("VIEX GP"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or any other purpose.

F3: Securities of the Issuer beneficially owned directly by Series Two. VIEX GP, as the general partner of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. VIEX Capital, as the investment manager of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two.

F4: Represents a weighted average price. These Shares were purchased in multiple transactions at prices ranging from $15.96 to $15.93. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares purchased at each separate price within the range set forth in this footnote.

F5: On May 20, 2022, the Reporting Persons filed a Form 4 which inadvertently reported that Series Two beneficially owned 53,076 shares of Common Stock following the transactions reported therein when Series Two, in fact, beneficially owned 53,036 shares of Common Stock. Subsequent Form 4s filed by the Reporting Persons on May 26, 2022, and June 9, 2022 inadvertently reported an incorrect number of shares beneficially owned by Series Two following each transaction thereafter, and the Form 4 filed by the Reporting Persons on June 9, 2022 also inadvertently reported that Series Two sold 13,051 shares of Common Stock on June 7, 2022 and beneficially owned 25 shares of Common Stock thereafter. Accordingly, this amendment is being filed to report that Series Two, in fact, sold 13,036 shares of Common Stock on June 7, 2022 and beneficially owned 0 shares of Common Stock thereafter.

Past disclosures · reporting ended (1)

No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.

QUANTUM CORP /DE/

Report date December 10, 2019 · Filed December 13, 2019

Jointly reported with Singer Eric, VIEX Opportunities Fund, LP Series One, VIEX Special Opportunities Fund III, LP, VIEX GP, LLC, VIEX Special Opportunities GP III, LLC, VIEX Capital Advisors, LLC

Section 16 reporting ended · disclosed 2019-12-13. Current position is not established by this disclosure.

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common Stock, par value $0.001SEC Table I · non-derivative	IndirectBy Viex Opportunities Fund, LP - Series One	835,679	Reported balance After 2019-12-10 transaction · row 2 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 2 · 2019-12-10 · Sale · Disposed 90,304 · Balance 835,679 F1: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F2: As of the close of business on December 10, 2019, the Reporting Persons ceased to be holders of an aggregate of 10% or more of Quantum Corporation's (the "Issuer") outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. F4: Securities of the Issuer beneficially owned directly by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One. VIEX Capital, as the investment manager of Series One, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One.
Common Stock, par value $0.001SEC Table I · non-derivative	IndirectBy Viex Opportunities Fund, LP - Series Two	159,421	Reported balance After 2019-12-10 transaction · row 3 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 3 · 2019-12-10 · Sale · Disposed 17,227 · Balance 159,421 F1: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F2: As of the close of business on December 10, 2019, the Reporting Persons ceased to be holders of an aggregate of 10% or more of Quantum Corporation's (the "Issuer") outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. F5: Securities of the Issuer beneficially owned directly by Series Two. VIEX GP, as the general partner of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. VIEX Capital, as the investment manager of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two.
Common Stock, par value $0.001SEC Table I · non-derivative	IndirectBy Viex Special Opportunities Fund III, LP	2,336,364	Reported balance After 2019-12-10 transaction · row 4 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 4 · 2019-12-10 · Sale · Disposed 252,469 · Balance 2,336,364 F1: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F2: As of the close of business on December 10, 2019, the Reporting Persons ceased to be holders of an aggregate of 10% or more of Quantum Corporation's (the "Issuer") outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. F6: Securities of the Issuer beneficially owned directly by VSO III. VSO GP III, as the general partner of VSO III, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO III. VIEX Capital, as the investment manager of VSO III, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO III. Mr. Singer, as the managing member of each of VSO GP III and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO III.
Common Stock, par value $0.001SEC Table I · non-derivative	Direct	66,681	Reported balance Holding disclosure · report date 2019-12-10 · row 1 Holding and transaction disclosures are not merged. 1 source row Row 1 · Balance 66,681 F1: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F2: As of the close of business on December 10, 2019, the Reporting Persons ceased to be holders of an aggregate of 10% or more of Quantum Corporation's (the "Issuer") outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. F3: Each share is represented by a restricted stock unit, all of which are fully vested and each of which represents a contingent right to receive one share of common stock of the Issuer.

Filing footnotes · ownership attribution and instrument terms

F1: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2: As of the close of business on December 10, 2019, the Reporting Persons ceased to be holders of an aggregate of 10% or more of Quantum Corporation's (the "Issuer") outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

F3: Each share is represented by a restricted stock unit, all of which are fully vested and each of which represents a contingent right to receive one share of common stock of the Issuer.

F4: Securities of the Issuer beneficially owned directly by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One. VIEX Capital, as the investment manager of Series One, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One.

F5: Securities of the Issuer beneficially owned directly by Series Two. VIEX GP, as the general partner of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. VIEX Capital, as the investment manager of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two.

F6: Securities of the Issuer beneficially owned directly by VSO III. VSO GP III, as the general partner of VSO III, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO III. VIEX Capital, as the investment manager of VSO III, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO III. Mr. Singer, as the managing member of each of VSO GP III and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO III.

Transaction history

JSON API

Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction date	Company	Activity / security	Shares / units	Reported price	Reported value	Details
November 14, 2019 Filed Nov 18, 2019 16:27 UTC	A10 Networks, Inc. ATEN · Entity 4574	OtherCommon Stock, par value $0.00001	67,200	$7.50	$504,000.00	Disclosure SEC source: 0001209191-19-056945 · doc4.xml · nonDerivative · entry 1 Singer Eric · CIK 0001443284 · Director VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Director VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · Director VIEX GP, LLC · CIK 0001654852 · Director VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Director VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Director VIEX Special Opportunities Fund III, LP · CIK 0001619126 · Director VIEX Special Opportunities GP III, LLC · CIK 0001676049 · Director VIEX Capital Advisors, LLC · CIK 0001619125 · Director Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Viex Special Opportunities Fund II, LP Disclosed balance after: 4,966,322 F1 · kind: Shares of Common Stock of A10 Networks, Inc. (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transaction reported herein represent the exercise of 672 put option contracts on November 14, 2019 sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty and the acquisition of the shares underlying such put options by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. F2 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F3 · ownership.nature: Securities of the Issuer beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document
August 16, 2019 Filed Aug 19, 2019 17:31 UTC	A10 Networks, Inc. ATEN · Entity 4574	OtherPut Option (Obligation to Buy) · Derivative	1,117	$0.00 Strike: $5.00	$0.00	Disclosure SEC source: 0001209191-19-046654 · doc4.xml · derivative · entry 7 Singer Eric · CIK 0001443284 · Director VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Director VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · Director VIEX GP, LLC · CIK 0001654852 · Director VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Director VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Director VIEX Special Opportunities Fund III, LP · CIK 0001619126 · Director VIEX Special Opportunities GP III, LLC · CIK 0001676049 · Director VIEX Capital Advisors, LLC · CIK 0001619125 · Director Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Viex Special Opportunities Fund II, LP Disclosed balance after: 0 Underlying: Common Stock, par value $0.00001 · 111,700 shares Expires 2019-08-16 F9 · kind: Put options expired on August 16, 2019. F9 · derivative.exercise_date: Put options expired on August 16, 2019. F2 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F3 · ownership.nature: Securities of the Issuer beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document
August 16, 2019 Filed Aug 19, 2019 17:31 UTC	A10 Networks, Inc. ATEN · Entity 4574	OtherPut Option (Obligation to Buy) · Derivative	11,048	$0.00 Strike: $7.50	$0.00	Disclosure SEC source: 0001209191-19-046654 · doc4.xml · derivative · entry 6 Singer Eric · CIK 0001443284 · Director VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Director VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · Director VIEX GP, LLC · CIK 0001654852 · Director VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Director VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Director VIEX Special Opportunities Fund III, LP · CIK 0001619126 · Director VIEX Special Opportunities GP III, LLC · CIK 0001676049 · Director VIEX Capital Advisors, LLC · CIK 0001619125 · Director Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Viex Special Opportunities Fund II, LP Disclosed balance after: 0 Underlying: Common Stock, par value $0.00001 · 1,104,800 shares Expires 2019-08-16 F1 · kind: Shares of Common Stock of A10 Networks, Inc. (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transaction reported herein represent the exercise of 11,048 put option contracts on August 16, 2019 sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty and the acquisition of the shares underlying such put options by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. F8 · derivative.exercise_date: These options are currently exercisable. F2 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F3 · ownership.nature: Securities of the Issuer beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document
August 16, 2019 Filed Aug 19, 2019 17:31 UTC	A10 Networks, Inc. ATEN · Entity 4574	OtherCommon Stock, par value $0.00001	1,104,800	$7.50	$8,286,000.00	Disclosure SEC source: 0001209191-19-046654 · doc4.xml · nonDerivative · entry 1 Singer Eric · CIK 0001443284 · Director VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Director VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · Director VIEX GP, LLC · CIK 0001654852 · Director VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Director VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Director VIEX Special Opportunities Fund III, LP · CIK 0001619126 · Director VIEX Special Opportunities GP III, LLC · CIK 0001676049 · Director VIEX Capital Advisors, LLC · CIK 0001619125 · Director Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Viex Special Opportunities Fund II, LP Disclosed balance after: 4,899,122 F1 · kind: Shares of Common Stock of A10 Networks, Inc. (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transaction reported herein represent the exercise of 11,048 put option contracts on August 16, 2019 sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty and the acquisition of the shares underlying such put options by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. F2 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F3 · ownership.nature: Securities of the Issuer beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document
August 15, 2019 Filed Aug 16, 2019 18:10 UTC	A10 Networks, Inc. ATEN · Entity 4574	OtherPut Option (Obligation to Buy) · Derivative	2,179	$0.00 Strike: $7.50	$0.00	Disclosure SEC source: 0001209191-19-046403 · doc4.xml · derivative · entry 8 Singer Eric · CIK 0001443284 · Director VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Director VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · Director VIEX GP, LLC · CIK 0001654852 · Director VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Director VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Director VIEX Special Opportunities Fund III, LP · CIK 0001619126 · Director VIEX Special Opportunities GP III, LLC · CIK 0001676049 · Director VIEX Capital Advisors, LLC · CIK 0001619125 · Director Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Viex Special Opportunities Fund II, LP Disclosed balance after: 11,048 Underlying: Common Stock, par value $0.00001 · 217,900 shares Expires 2019-08-16 F1 · kind: Shares of Common Stock of A10 Networks, Inc. (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercises of (i) 452 put option contracts on August 14, 2019 and (ii) 2,179 put option contracts on August 15, 2019 sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty and the acquisition of the shares underlying such put options by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. F8 · derivative.exercise_date: These options are currently exercisable. F2 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F3 · ownership.nature: Securities of the Issuer beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document
August 15, 2019 Filed Aug 16, 2019 18:10 UTC	A10 Networks, Inc. ATEN · Entity 4574	OtherCommon Stock, par value $0.00001	217,900	$7.50	$1,634,250.00	Disclosure SEC source: 0001209191-19-046403 · doc4.xml · nonDerivative · entry 2 Singer Eric · CIK 0001443284 · Director VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Director VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · Director VIEX GP, LLC · CIK 0001654852 · Director VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Director VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Director VIEX Special Opportunities Fund III, LP · CIK 0001619126 · Director VIEX Special Opportunities GP III, LLC · CIK 0001676049 · Director VIEX Capital Advisors, LLC · CIK 0001619125 · Director Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Viex Special Opportunities Fund II, LP Disclosed balance after: 3,794,322 F1 · kind: Shares of Common Stock of A10 Networks, Inc. (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercises of (i) 452 put option contracts on August 14, 2019 and (ii) 2,179 put option contracts on August 15, 2019 sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty and the acquisition of the shares underlying such put options by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. F2 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F3 · ownership.nature: Securities of the Issuer beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document
August 14, 2019 Filed Aug 16, 2019 18:10 UTC	A10 Networks, Inc. ATEN · Entity 4574	OtherPut Option (Obligation to Buy) · Derivative	452	$0.00 Strike: $7.50	$0.00	Disclosure SEC source: 0001209191-19-046403 · doc4.xml · derivative · entry 7 Singer Eric · CIK 0001443284 · Director VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Director VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · Director VIEX GP, LLC · CIK 0001654852 · Director VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Director VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Director VIEX Special Opportunities Fund III, LP · CIK 0001619126 · Director VIEX Special Opportunities GP III, LLC · CIK 0001676049 · Director VIEX Capital Advisors, LLC · CIK 0001619125 · Director Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Viex Special Opportunities Fund II, LP Disclosed balance after: 13,227 Underlying: Common Stock, par value $0.00001 · 45,200 shares Expires 2019-08-16 F1 · kind: Shares of Common Stock of A10 Networks, Inc. (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercises of (i) 452 put option contracts on August 14, 2019 and (ii) 2,179 put option contracts on August 15, 2019 sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty and the acquisition of the shares underlying such put options by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. F8 · derivative.exercise_date: These options are currently exercisable. F2 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F3 · ownership.nature: Securities of the Issuer beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document
August 14, 2019 Filed Aug 16, 2019 18:10 UTC	A10 Networks, Inc. ATEN · Entity 4574	OtherCommon Stock, par value $0.00001	45,200	$7.50	$339,000.00	Disclosure SEC source: 0001209191-19-046403 · doc4.xml · nonDerivative · entry 1 Singer Eric · CIK 0001443284 · Director VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Director VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · Director VIEX GP, LLC · CIK 0001654852 · Director VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Director VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Director VIEX Special Opportunities Fund III, LP · CIK 0001619126 · Director VIEX Special Opportunities GP III, LLC · CIK 0001676049 · Director VIEX Capital Advisors, LLC · CIK 0001619125 · Director Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Viex Special Opportunities Fund II, LP Disclosed balance after: 3,576,422 F1 · kind: Shares of Common Stock of A10 Networks, Inc. (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercises of (i) 452 put option contracts on August 14, 2019 and (ii) 2,179 put option contracts on August 15, 2019 sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty and the acquisition of the shares underlying such put options by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock of the Issuer beneficially owned by VSO II. F2 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F3 · ownership.nature: Securities of the Issuer beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document
July 26, 2019 Filed Jul 30, 2019 17:02 UTC	A10 Networks, Inc. ATEN · Entity 4574	GrantCommon Stock, par value $0.00001	30,120	$0.00	$0.00	Disclosure SEC source: 0000921895-19-002071 · form410114025_07302019.xml · nonDerivative · entry 1 Singer Eric · CIK 0001443284 · Director VIEX Opportunities Fund, LP Series One · CIK 0001606750 · See Explanation of Responses VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · See Explanation of Responses VIEX Special Opportunities Fund II, LP · CIK 0001619127 · See Explanation of Responses VIEX Special Opportunities Fund III, LP · CIK 0001619126 · See Explanation of Responses VIEX GP, LLC · CIK 0001654852 · See Explanation of Responses VIEX Special Opportunities GP II, LLC · CIK 0001658891 · See Explanation of Responses VIEX Special Opportunities GP III, LLC · CIK 0001676049 · See Explanation of Responses VIEX Capital Advisors, LLC · CIK 0001619125 · See Explanation of Responses Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 30,120 F2 · balance_after: Each share is represented by a restricted stock unit, which vests in three equal annual installments on the anniversary of the grant date of 07/26/2019, provided that the Reporting Person continues to serve through each vesting date. F1 · ownership.direct: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), Viex Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), Viex Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). Read SEC document
December 01, 2017 Filed Dec 4, 2017 21:18 UTC	QUANTUM CORP /DE/ QTM · Entity 4987	GrantCommon Stock	16,681	$0.00	$0.00	Disclosure SEC source: 0001209191-17-063533 · doc4.xml · nonDerivative · entry 1 Singer Eric · CIK 0001443284 · Director · 10% owner VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner VIEX Opportunities Fund, LP Series Two · CIK 0001659404 · 10% owner VIEX Special Opportunities Fund III, LP · CIK 0001619126 · 10% owner VIEX Special Opportunities GP III, LLC · CIK 0001676049 · 10% owner VIEX GP, LLC · CIK 0001654852 · 10% owner VIEX Capital Advisors, LLC · CIK 0001619125 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 16,681 F1 · security: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP ("VIEX Opportunities"), a series limited partnership, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities, VIEX Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons"). F2 · security: The Reporting Persons are filing this report because each of the Reporting Persons is a member of a Section 13(d) group, disclosed in a Schedule 13D filed on behalf of the Reporting Persons, as it may be amended, which beneficially owns in the aggregate more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the shares of Common Stock reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such shares of Common Stock for purposes of Section 16 or for any other purpose. F3 · shares: Restricted stock units will fully vest on the earlier to occur of: i) the date of Quantum Corporation's next Annual Stockholder Meeting; and ii) September 1, 2018. F4 · balance_after: Reflects a 1-for-8 reverse stock split of the Issuer's common stock effected on April 18, 2017. F5 · balance_after: Mr. Singer, as the managing member of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the (i) 925,983 Shares owned by Series One, (ii) 176,648 Shares owned by Series Two and (iii) 2,588,833 owned by VSO III. Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.