Sum Alex

SEC source: 0000929638-26-003526 · form4.xml · nonDerivative · entry 1

Sum Alex · CIK 0001543349 · Sr. VP of Sales and Marketing

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 258,743

F1 · kind: Represents restricted stock units ("RSU"), which constitute a contingent right to receive one share of common stock, par value $0.0001 per share, of GCT Semiconductor Holding, Inc. The RSUs vest over four years in equal 25% installments on each anniversary of the September 10, 2026 grant date, commencing September 10, 2026, subject to the Reporting Person's continued service with the Issuer.

SEC source: 0000929638-25-003560 · form4.xml · nonDerivative · entry 1

Sum Alex · CIK 0001543349 · Sr. VP of Sales and Marketing

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 183,743

F1 · kind: Represents restricted stock units ("RSU"), which constitute a contingent right to receive one share of common stock, par value $0.0001 per share, of GCT Semiconductor Holding, Inc. The RSUs vest over four years in equal 25% installments on each anniversary of the September 19, 2025 grant date, commencing September 19, 2026, subject to the Reporting Person's continued service with the Issuer.

SEC source: 0000929638-25-000839 · form4.xml · derivative · entry 2

Sum Alex · CIK 0001543349 · Sr. VP of Sales and Marketing

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,259 shares

Expires 2025-02-23

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: Options fully vested.

SEC source: 0000929638-25-000839 · form4.xml · nonDerivative · entry 1

Sum Alex · CIK 0001543349 · Sr. VP of Sales and Marketing

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,743

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: A portion of these shares represent restricted stock units.

SEC source: 0000929638-24-001259 · form4.xml · derivative · entry 6

Sum Alex · CIK 0001543349 · VP of Marketing and Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,338

Underlying: Common Stock · 9,338 shares

Expires 2030-01-01

F3 · kind: Pursuant to the Business Combination Agreement, at the Effective Time, each outstanding option to purchase shares of GCT common stock was assumed and converted into an option to purchase shares of common stock of the Issuer with the same terms and conditions as were applicable to such option immediately prior to the Effective Time, subject to the applicable exchange ratio.

F7 · derivative.exercise_date: The option vests with respect to (i) twenty-five percent (25%) of the shares upon completion of one (1) year of service measured from January 1, 2020 and (ii) the balance of the shares subject to the option in a series of thirty-six (36) successive equal monthly installments upon completion of each additional month of service over the thirty-six (36) month period measured from January 1, 2021.

SEC source: 0000929638-24-001259 · form4.xml · derivative · entry 5

Sum Alex · CIK 0001543349 · VP of Marketing and Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,540

Underlying: Common Stock · 13,540 shares

Expires 2029-01-01

F3 · kind: Pursuant to the Business Combination Agreement, at the Effective Time, each outstanding option to purchase shares of GCT common stock was assumed and converted into an option to purchase shares of common stock of the Issuer with the same terms and conditions as were applicable to such option immediately prior to the Effective Time, subject to the applicable exchange ratio.

F6 · derivative.exercise_date: The option vests with respect to (i) twenty-five percent (25%) of the shares upon completion of one (1) year of service measured from January 1, 2019 and (ii) the balance of the shares subject to the option in a series of thirty-six (36) successive equal monthly installments upon completion of each additional month of service over the thirty-six (36) month period measured from January 1, 2020.

SEC source: 0000929638-24-001259 · form4.xml · derivative · entry 4

Sum Alex · CIK 0001543349 · VP of Marketing and Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,820

Underlying: Common Stock · 13,820 shares

Expires 2028-01-01

F3 · kind: Pursuant to the Business Combination Agreement, at the Effective Time, each outstanding option to purchase shares of GCT common stock was assumed and converted into an option to purchase shares of common stock of the Issuer with the same terms and conditions as were applicable to such option immediately prior to the Effective Time, subject to the applicable exchange ratio.

F5 · derivative.exercise_date: The option vests with respect to (i) twenty-five percent (25%) of the shares upon completion of one (1) year of service measured from January 1, 2018 and (ii) the balance of the shares subject to the option in a series of thirty-six (36) successive equal monthly installments upon completion of each additional month of service over the thirty-six (36) month period measured from January 1, 2019.

SEC source: 0000929638-24-001259 · form4.xml · derivative · entry 3

Sum Alex · CIK 0001543349 · VP of Marketing and Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,259

Underlying: Common Stock · 13,259 shares

Expires 2025-01-01

F3 · kind: Pursuant to the Business Combination Agreement, at the Effective Time, each outstanding option to purchase shares of GCT common stock was assumed and converted into an option to purchase shares of common stock of the Issuer with the same terms and conditions as were applicable to such option immediately prior to the Effective Time, subject to the applicable exchange ratio.

F4 · derivative.exercise_date: The option vests with respect to (i) twenty-five percent (25%) of the shares upon completion of one (1) year of service measured from January 1, 2015 and (ii) the balance of the shares subject to the option in a series of thirty-six (36) successive equal monthly installments upon completion of each additional month of service over the thirty-six (36) month period measured from January 1, 2016.

SEC source: 0000929638-24-001259 · form4.xml · nonDerivative · entry 2

Sum Alex · CIK 0001543349 · VP of Marketing and Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,341

F2 · kind: Represents the Issuer's common stock subject to restricted stock units (RSUs). Pursuant to the Business Combination Agreement, at the Effective Time (as defined in the Business Combination Agreement), each award of restricted stock units relating to a share of GCT common stock granted under GCT's existing equity plans was automatically converted into an award of restricted stock units covering the number of shares of the common stock of the Issuer in the manner set forth in the Business Combination Agreement. The shares subject to RSUs reported herein will vest in equal annual installments over a four (4) year period measured from December 11, 2023.

SEC source: 0000929638-24-001259 · form4.xml · nonDerivative · entry 1

Sum Alex · CIK 0001543349 · VP of Marketing and Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,142

F1 · kind: Pursuant to the Business Combination Agreement, dated as of November 2, 2023 (the "Business Combination Agreement"), by and among Concord Acquisition Corp III, Gibraltar Merger Sub Inc., and GCT Semiconductor, Inc. ("GCT"), at the Effective Time (as defined in the Business Combination Agreement), each share of GCT common stock was automatically converted for the right to receive common stock of the Issuer in the manner set forth in the Business Combination Agreement.

SEC source: 0000929638-25-000892 · form4.xml · derivative · entry 6

Sum Alex · CIK 0001543349 · Sr. VP of Sales and Marketing

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,338

Underlying: Common Stock · 9,338 shares

Expires 2030-06-08

F3 · kind: Pursuant to the Business Combination Agreement, at the Effective Time, each outstanding option to purchase shares of GCT common stock was assumed and converted into an option to purchase shares of common stock of the Issuer with the same terms and conditions as were applicable to such option immediately prior to the Effective Time, subject to the applicable exchange ratio.

F7 · derivative.exercise_date: The option vests with respect to (i) twenty-five percent (25%) of the shares upon completion of one (1) year of service measured from January 1, 2020 and (ii) the balance of the shares subject to the option in a series of thirty-six (36) successive equal monthly installments upon completion of each additional month of service over the thirty-six (36) month period measured from January 1, 2021.

F9 · derivative.expiration_date: This amendment is also being filed by the Reporting Person to amend the Form 4 filed on March 26, 2024 to correct the reported expiration date of stock options following the transactions previously reported on March 26, 2024.

SEC source: 0000929638-25-000892 · form4.xml · derivative · entry 5

Sum Alex · CIK 0001543349 · Sr. VP of Sales and Marketing

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,540

Underlying: Common Stock · 13,540 shares

Expires 2029-04-19

F3 · kind: Pursuant to the Business Combination Agreement, at the Effective Time, each outstanding option to purchase shares of GCT common stock was assumed and converted into an option to purchase shares of common stock of the Issuer with the same terms and conditions as were applicable to such option immediately prior to the Effective Time, subject to the applicable exchange ratio.

F6 · derivative.exercise_date: The option vests with respect to (i) twenty-five percent (25%) of the shares upon completion of one (1) year of service measured from January 1, 2019 and (ii) the balance of the shares subject to the option in a series of thirty-six (36) successive equal monthly installments upon completion of each additional month of service over the thirty-six (36) month period measured from January 1, 2020.

F9 · derivative.expiration_date: This amendment is also being filed by the Reporting Person to amend the Form 4 filed on March 26, 2024 to correct the reported expiration date of stock options following the transactions previously reported on March 26, 2024.

SEC source: 0000929638-25-000892 · form4.xml · derivative · entry 4

Sum Alex · CIK 0001543349 · Sr. VP of Sales and Marketing

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,820

Underlying: Common Stock · 13,820 shares

Expires 2028-03-14

F3 · kind: Pursuant to the Business Combination Agreement, at the Effective Time, each outstanding option to purchase shares of GCT common stock was assumed and converted into an option to purchase shares of common stock of the Issuer with the same terms and conditions as were applicable to such option immediately prior to the Effective Time, subject to the applicable exchange ratio.

F5 · derivative.exercise_date: The option vests with respect to (i) twenty-five percent (25%) of the shares upon completion of one (1) year of service measured from January 1, 2018 and (ii) the balance of the shares subject to the option in a series of thirty-six (36) successive equal monthly installments upon completion of each additional month of service over the thirty-six (36) month period measured from January 1, 2019.

F9 · derivative.expiration_date: This amendment is also being filed by the Reporting Person to amend the Form 4 filed on March 26, 2024 to correct the reported expiration date of stock options following the transactions previously reported on March 26, 2024.

SEC source: 0000929638-25-000892 · form4.xml · derivative · entry 3

Sum Alex · CIK 0001543349 · Sr. VP of Sales and Marketing

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,259

Underlying: Common Stock · 13,259 shares

Expires 2025-02-23

F3 · kind: Pursuant to the Business Combination Agreement, at the Effective Time, each outstanding option to purchase shares of GCT common stock was assumed and converted into an option to purchase shares of common stock of the Issuer with the same terms and conditions as were applicable to such option immediately prior to the Effective Time, subject to the applicable exchange ratio.

F4 · derivative.exercise_date: The option vests with respect to (i) twenty-five percent (25%) of the shares upon completion of one (1) year of service measured from January 1, 2015 and (ii) the balance of the shares subject to the option in a series of thirty-six (36) successive equal monthly installments upon completion of each additional month of service over the thirty-six (36) month period measured from January 1, 2016.

F9 · derivative.expiration_date: This amendment is also being filed by the Reporting Person to amend the Form 4 filed on March 26, 2024 to correct the reported expiration date of stock options following the transactions previously reported on March 26, 2024.

SEC source: 0000929638-25-000892 · form4.xml · nonDerivative · entry 2

Sum Alex · CIK 0001543349 · Sr. VP of Sales and Marketing

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,341

F2 · kind: Represents the Issuer's common stock subject to restricted stock units (RSUs). Pursuant to the Business Combination Agreement, at the Effective Time (as defined in the Business Combination Agreement), each award of restricted stock units relating to a share of GCT common stock granted under GCT's existing equity plans was automatically converted into an award of restricted stock units covering the number of shares of the common stock of the Issuer in the manner set forth in the Business Combination Agreement. The shares subject to RSUs reported herein will vest in equal annual installments over a four (4) year period measured from December 11, 2023.

SEC source: 0000929638-25-000892 · form4.xml · nonDerivative · entry 1

Sum Alex · CIK 0001543349 · Sr. VP of Sales and Marketing

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,143

F1 · kind: Pursuant to the Business Combination Agreement, dated as of November 2, 2023 (the "Business Combination Agreement"), by and among Concord Acquisition Corp III, Gibraltar Merger Sub Inc., and GCT Semiconductor, Inc. ("GCT"), at the Effective Time (as defined in the Business Combination Agreement), each share of GCT common stock was automatically converted for the right to receive common stock of the Issuer in the manner set forth in the Business Combination Agreement.

F8 · balance_after: This amendment is being filed to amend the securities as beneficially owned by the reporting person following the transactions previously reported on March 26, 2024. On March 26, 2024, the reporting person filed a Form 4, which inadvertently reported that the reporting person held 90,142 of common stock. As reported in this amendment, the reporting person directly owned 90,143 shares of common stock following the transactions.