VIEX Capital Advisors, LLC

SEC source: 0001567619-19-017292 · doc1.xml · derivative · entry 5

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Opportunities Fund, LP - Series One

Disclosed balance after: 0

Underlying: Common Stock · 62,800 shares

Expires 2019-08-16

F4 · kind: Shares of Common Stock of the Issuer beneficially owned directly by Series One. These transactions represent the exercise on August 16, 2019 of 628 call option contracts by Series One, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the shares of Common Stock 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 shares of Common Stock 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 shares of Common Stock of the Issuer beneficially owned by Series One.

F5 · kind: (continued from footnote 4) The Issuer Common Stock holding for Series One reported in the Forms 4 filed on August 6, 2019, and August 8, 2019 should have reflected 1,295,134 shares of Issuer Common Stock as previously reported.

F7 · derivative.exercise_date: These options were presently exercisable.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F4 · ownership.nature: Shares of Common Stock of the Issuer beneficially owned directly by Series One. These transactions represent the exercise on August 16, 2019 of 628 call option contracts by Series One, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the shares of Common Stock 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 shares of Common Stock 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 shares of Common Stock of the Issuer beneficially owned by Series One.

F5 · ownership.nature: (continued from footnote 4) The Issuer Common Stock holding for Series One reported in the Forms 4 filed on August 6, 2019, and August 8, 2019 should have reflected 1,295,134 shares of Issuer Common Stock as previously reported.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0001567619-19-017292 · doc1.xml · derivative · entry 4

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 0

Underlying: Common Stock · 154,400 shares

Expires 2019-08-16

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. These transactions represent the exercise on August 16, 2019 of 1,544 call option contracts by VSO II, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by VSO II, and the exercise on August 16, 2019 of 584 put option contracts 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.

F3 · kind: (continued from footnote 2) 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.

F7 · derivative.exercise_date: These options were presently exercisable.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. These transactions represent the exercise on August 16, 2019 of 1,544 call option contracts by VSO II, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by VSO II, and the exercise on August 16, 2019 of 584 put option contracts 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.

F3 · ownership.nature: (continued from footnote 2) 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.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0001567619-19-017292 · doc1.xml · nonDerivative · entry 3

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 1,804,898

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. These transactions represent the exercise on August 16, 2019 of 1,544 call option contracts by VSO II, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by VSO II, and the exercise on August 16, 2019 of 584 put option contracts 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.

F3 · kind: (continued from footnote 2) 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.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. These transactions represent the exercise on August 16, 2019 of 1,544 call option contracts by VSO II, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by VSO II, and the exercise on August 16, 2019 of 584 put option contracts 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.

F3 · ownership.nature: (continued from footnote 2) 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.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0001567619-19-017292 · doc1.xml · nonDerivative · entry 2

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Opportunities Fund, LP - Series One

Disclosed balance after: 1,357,934

F4 · kind: Shares of Common Stock of the Issuer beneficially owned directly by Series One. These transactions represent the exercise on August 16, 2019 of 628 call option contracts by Series One, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the shares of Common Stock 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 shares of Common Stock 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 shares of Common Stock of the Issuer beneficially owned by Series One.

F5 · kind: (continued from footnote 4) The Issuer Common Stock holding for Series One reported in the Forms 4 filed on August 6, 2019, and August 8, 2019 should have reflected 1,295,134 shares of Issuer Common Stock as previously reported.

F4 · balance_after: Shares of Common Stock of the Issuer beneficially owned directly by Series One. These transactions represent the exercise on August 16, 2019 of 628 call option contracts by Series One, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the shares of Common Stock 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 shares of Common Stock 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 shares of Common Stock of the Issuer beneficially owned by Series One.

F5 · balance_after: (continued from footnote 4) The Issuer Common Stock holding for Series One reported in the Forms 4 filed on August 6, 2019, and August 8, 2019 should have reflected 1,295,134 shares of Issuer Common Stock as previously reported.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F4 · ownership.nature: Shares of Common Stock of the Issuer beneficially owned directly by Series One. These transactions represent the exercise on August 16, 2019 of 628 call option contracts by Series One, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the shares of Common Stock 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 shares of Common Stock 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 shares of Common Stock of the Issuer beneficially owned by Series One.

F5 · ownership.nature: (continued from footnote 4) The Issuer Common Stock holding for Series One reported in the Forms 4 filed on August 6, 2019, and August 8, 2019 should have reflected 1,295,134 shares of Issuer Common Stock as previously reported.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0001567619-19-017292 · doc1.xml · nonDerivative · entry 1

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 1,746,498

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. These transactions represent the exercise on August 16, 2019 of 1,544 call option contracts by VSO II, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by VSO II, and the exercise on August 16, 2019 of 584 put option contracts 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.

F3 · kind: (continued from footnote 2) 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.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. These transactions represent the exercise on August 16, 2019 of 1,544 call option contracts by VSO II, each contract representing 100 shares of Issuer Common Stock, and the acquisition of the shares underlying such call options by VSO II, and the exercise on August 16, 2019 of 584 put option contracts 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.

F3 · ownership.nature: (continued from footnote 2) 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.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

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.

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.

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.

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.

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.

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.

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.

SEC source: 0000899243-19-021348 · doc4.xml · derivative · entry 7

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 584

Underlying: Common Stock · 12,500 shares

Expires 2019-08-16

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · kind: (continued from footnote 2) 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.

F7 · derivative.exercise_date: These options are currently exercisable.

F8 · balance_after: The amount reported in Column 9 of Table II following the July 18, 2019 exercise of put options reflects the number of put option contracts outstanding following such exercise. The amounts reported in Column 9 of Table II following the August 6, 2019 and August 7, 2019 exercises of put options reflect the number of put option contracts outstanding following such exercises, taking into account the transactions reported on the Form 4 filed on August 6, 2019.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · ownership.nature: (continued from footnote 2) 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.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-021348 · doc4.xml · nonDerivative · entry 3

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 1,592,098

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · kind: (continued from footnote 2) 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.

F4 · balance_after: The amount reported in Column 5 of Table I following the July 18, 2019 exercise of put options reflects the amount beneficially owned following that transaction. The amounts reported in Column 5 of Table I following the August 6, 2019 and August 7, 2019 exercises of put options reflect the amounts beneficially owned following those transactions and take into account the transactions reported on the Form 4 filed on August 6, 2019.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · ownership.nature: (continued from footnote 2) 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.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-021348 · doc4.xml · derivative · entry 6

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 709

Underlying: Common Stock · 19,100 shares

Expires 2019-08-16

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · kind: (continued from footnote 2) 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.

F7 · derivative.exercise_date: These options are currently exercisable.

F8 · balance_after: The amount reported in Column 9 of Table II following the July 18, 2019 exercise of put options reflects the number of put option contracts outstanding following such exercise. The amounts reported in Column 9 of Table II following the August 6, 2019 and August 7, 2019 exercises of put options reflect the number of put option contracts outstanding following such exercises, taking into account the transactions reported on the Form 4 filed on August 6, 2019.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · ownership.nature: (continued from footnote 2) 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.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-021348 · doc4.xml · nonDerivative · entry 2

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 1,579,598

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · kind: (continued from footnote 2) 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.

F4 · balance_after: The amount reported in Column 5 of Table I following the July 18, 2019 exercise of put options reflects the amount beneficially owned following that transaction. The amounts reported in Column 5 of Table I following the August 6, 2019 and August 7, 2019 exercises of put options reflect the amounts beneficially owned following those transactions and take into account the transactions reported on the Form 4 filed on August 6, 2019.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · ownership.nature: (continued from footnote 2) 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.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-021088 · doc4.xml · derivative · entry 5

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 925

Underlying: Common Stock · 2,500 shares

Expires 2019-08-16

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on August 2, 2019 of 50 put option contracts sold by VSO II and the exercise on August 5, 2019 of 25 put option contracts sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty to such contracts 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.

F5 · derivative.exercise_date: These options are currently exercisable.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on August 2, 2019 of 50 put option contracts sold by VSO II and the exercise on August 5, 2019 of 25 put option contracts sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty to such contracts 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.

F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-021088 · doc4.xml · nonDerivative · entry 2

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 1,557,998

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on August 2, 2019 of 50 put option contracts sold by VSO II and the exercise on August 5, 2019 of 25 put option contracts sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty to such contracts 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.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on August 2, 2019 of 50 put option contracts sold by VSO II and the exercise on August 5, 2019 of 25 put option contracts sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty to such contracts 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.

F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-021088 · doc4.xml · derivative · entry 4

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 950

Underlying: Common Stock · 5,000 shares

Expires 2019-08-16

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on August 2, 2019 of 50 put option contracts sold by VSO II and the exercise on August 5, 2019 of 25 put option contracts sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty to such contracts 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.

F5 · derivative.exercise_date: These options are currently exercisable.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on August 2, 2019 of 50 put option contracts sold by VSO II and the exercise on August 5, 2019 of 25 put option contracts sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty to such contracts 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.

F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-021088 · doc4.xml · nonDerivative · entry 1

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 1,555,498

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on August 2, 2019 of 50 put option contracts sold by VSO II and the exercise on August 5, 2019 of 25 put option contracts sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty to such contracts 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.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on August 2, 2019 of 50 put option contracts sold by VSO II and the exercise on August 5, 2019 of 25 put option contracts sold by VSO II, each contract representing 100 shares of Issuer Common Stock, by the counterparty to such contracts 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.

F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

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").

SEC source: 0000899243-19-021348 · doc4.xml · derivative · entry 5

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 975

Underlying: Common Stock · 2,500 shares

Expires 2019-08-16

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · kind: (continued from footnote 2) 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.

F7 · derivative.exercise_date: These options are currently exercisable.

F8 · balance_after: The amount reported in Column 9 of Table II following the July 18, 2019 exercise of put options reflects the number of put option contracts outstanding following such exercise. The amounts reported in Column 9 of Table II following the August 6, 2019 and August 7, 2019 exercises of put options reflect the number of put option contracts outstanding following such exercises, taking into account the transactions reported on the Form 4 filed on August 6, 2019.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · ownership.nature: (continued from footnote 2) 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.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-021348 · doc4.xml · nonDerivative · entry 1

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 1,552,998

F2 · kind: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · kind: (continued from footnote 2) 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.

F4 · balance_after: The amount reported in Column 5 of Table I following the July 18, 2019 exercise of put options reflects the amount beneficially owned following that transaction. The amounts reported in Column 5 of Table I following the August 6, 2019 and August 7, 2019 exercises of put options reflect the amounts beneficially owned following those transactions and take into account the transactions reported on the Form 4 filed on August 6, 2019.

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (the "Issuer") beneficially owned directly by VSO II or options sold by VSO II. The transactions reported herein represent the exercise on July 18, 2019 of 25 put option contracts sold by VSO II, the exercise on August 6, 2019 of 191 put option contracts sold by VSO II and the exercise on August 7, 2019 of 125 put option contracts 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.

F3 · ownership.nature: (continued from footnote 2) 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.

F6 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-017553 · doc4.xml · nonDerivative · entry 4

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 1,550,498

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F3 · ownership.nature: Shares of Common Stock 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 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.

F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-017553 · doc4.xml · nonDerivative · entry 3

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 1,496,011

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F3 · ownership.nature: Shares of Common Stock 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 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.

F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-017553 · doc4.xml · nonDerivative · entry 2

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Opportunities Fund, LP - Series One

Disclosed balance after: 1,295,134

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (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 shares of Common Stock 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 shares of Common Stock 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 shares of Common Stock of the Issuer beneficially owned by Series One.

F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-017553 · doc4.xml · nonDerivative · entry 1

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Opportunities Fund, LP - Series One

Disclosed balance after: 1,249,621

F1 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Shares of Common Stock of Immersion Corporation (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 shares of Common Stock 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 shares of Common Stock 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 shares of Common Stock of the Issuer beneficially owned by Series One.

F4 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-017361 · doc4.xml · nonDerivative · entry 2

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Special Opportunities Fund II, LP

Disclosed balance after: 1,455,146

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $7.50 to $7.70, inclusive. The Reporting Persons undertake to provide to Immersion Corporation (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 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F4 · ownership.nature: Shares of Common Stock 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 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.

F5 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000899243-19-017361 · doc4.xml · nonDerivative · entry 1

Singer Eric · CIK 0001443284 · 10% owner

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · 10% owner

VIEX GP, LLC · CIK 0001654852 · 10% owner

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · 10% owner

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · 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: Indirect · By VIEX Opportunities Fund, LP - Series One

Disclosed balance after: 1,215,486

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $7.50 to $7.70, inclusive. The Reporting Persons undertake to provide to Immersion Corporation (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 · 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 Special Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F3 · ownership.nature: Shares of Common Stock 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 shares of Common Stock 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 shares of Common Stock 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 shares of Common Stock of the Issuer beneficially owned by Series One.

F5 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the shares of Common Stock 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 shares of Common Stock for purposes of Section 16 or for any other purpose.

SEC source: 0000921895-17-002829 · form410114019_12082017.xml · nonDerivative · entry 4

Singer Eric · CIK 0001443284 · Passive Investor

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Passive Investor

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Passive Investor

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Passive Investor

VIEX GP, LLC · CIK 0001654852 · Passive Investor

VIEX Capital Advisors, LLC · CIK 0001619125 · Passive Investor

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: 1,603,783

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"), VIEXSpecial Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEXCapital"), 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.

F4 · ownership.nature: Shares of Common Stock beneficially owned directly 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 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 beneficially owned by VSO II. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock beneficially owned by VSO II.

SEC source: 0000921895-17-002829 · form410114019_12082017.xml · nonDerivative · entry 3

Singer Eric · CIK 0001443284 · Passive Investor

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Passive Investor

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Passive Investor

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Passive Investor

VIEX GP, LLC · CIK 0001654852 · Passive Investor

VIEX Capital Advisors, LLC · CIK 0001619125 · Passive Investor

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: 1,808,992

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"), VIEXSpecial Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEXCapital"), 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.

F4 · ownership.nature: Shares of Common Stock beneficially owned directly 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 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 beneficially owned by VSO II. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock beneficially owned by VSO II.

SEC source: 0000921895-17-002829 · form410114019_12082017.xml · nonDerivative · entry 2

Singer Eric · CIK 0001443284 · Passive Investor

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Passive Investor

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Passive Investor

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Passive Investor

VIEX GP, LLC · CIK 0001654852 · Passive Investor

VIEX Capital Advisors, LLC · CIK 0001619125 · Passive Investor

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By: VIEX Opportunities Fund, LP - Series One

Disclosed balance after: 1,623,438

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"), VIEXSpecial Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEXCapital"), 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 · ownership.nature: Shares of Common Stock beneficially owned directly by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the shares of Common Stock beneficially owned by Series One. VIEX Capital, as the investment manager of Series One, may be deemed the beneficial owner of the shares of Common Stock 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 shares of Common Stock beneficially owned by Series One.

SEC source: 0000921895-17-002829 · form410114019_12082017.xml · nonDerivative · entry 1

Singer Eric · CIK 0001443284 · Passive Investor

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · Passive Investor

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · Passive Investor

VIEX Special Opportunities GP II, LLC · CIK 0001658891 · Passive Investor

VIEX GP, LLC · CIK 0001654852 · Passive Investor

VIEX Capital Advisors, LLC · CIK 0001619125 · Passive Investor

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By: VIEX Opportunities Fund, LP - Series One

Disclosed balance after: 1,831,162

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"), VIEXSpecial Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEXCapital"), 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 · ownership.nature: Shares of Common Stock beneficially owned directly by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the shares of Common Stock beneficially owned by Series One. VIEX Capital, as the investment manager of Series One, may be deemed the beneficial owner of the shares of Common Stock 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 shares of Common Stock beneficially owned by Series One.

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.