John Schlaefer

CIK: 0001542775

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)1 (16.7%)

Derivative conversions

Awards (A)4 (66.7%)

Compensation grants

Other (G, F, J, C, D, …)1 (16.7%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

GCTS

GCT Semiconductor Holding, Inc.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (6 total)

GCTS
GCT Semiconductor Holding, Inc.
Sep 10, 2026
Award(A)
Direct
150K shares-
GCTS
GCT Semiconductor Holding, Inc.
Sep 26, 2025
Other(J)
Direct
555 shares-
GCTS
GCT Semiconductor Holding, Inc.
Sep 19, 2025
Award(A)
Direct
75K shares-
GCTS
GCT Semiconductor Holding, Inc.
Jan 13, 2025
Exercise(M)
Direct
35.7K shares at avg. $0.11$4K
GCTS
GCT Semiconductor Holding, Inc.
Mar 26, 2024
Award(A)
Direct
78.7K shares-
GCTS
GCT Semiconductor Holding, Inc.
Mar 26, 2024
Award(A)
Direct
12.8K shares-

		Type	Shares	Price		Ownership
Sep 10, 2026	GCTS GCT Semiconductor Holding, Inc.	Award(A)	150,000	-	$0	Direct
Sep 26, 2025	GCTS GCT Semiconductor Holding, Inc.	Other(J)	555	-	-	Direct
Sep 19, 2025	GCTS GCT Semiconductor Holding, Inc.	Award(A)	75,000	-	-	Direct
Jan 13, 2025	GCTS GCT Semiconductor Holding, Inc.	Exercise(M)	35,669	$0.11	$3,924	Direct
Mar 26, 2024	GCTS GCT Semiconductor Holding, Inc.	Award(A)	78,700	-	-	Direct
Mar 26, 2024	GCTS GCT Semiconductor Holding, Inc.	Award(A)	12,804	-	-	Direct

1-6 of 6 transactions

About Schlaefer John

Schlaefer John (SEC CIK 0001542775) files insider reports with the SEC as President, CEO & Class III Dir of GCT Semiconductor Holding, Inc. (GCTS).

Signal8 holds 5 ownership filings by Schlaefer John, all Form 4s, filed between Feb 21, 2025 and Sep 14, 2026. Those filings report 6 transactions, from Mar 26, 2024 to Sep 10, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Schlaefer John's filings is in SAN JOSE, CA.

Recent filings by Schlaefer John

Sep 10, 2026: Grant or award of GCTS shares (Form 4, code A).
Sep 26, 2025: Other transaction of GCTS shares (Form 4, code J).
Sep 19, 2025: Grant or award of GCTS shares (Form 4, code A).
Jan 13, 2025: Option exercise of GCTS shares (Form 4, code M).
Mar 26, 2024: Grants or awards of GCTS shares (2 lines, Form 4, code A).

Other insiders filing for GCT Semiconductor Holding, Inc. (GCTS)

Lee Kyeongho, Director
Barker Robert, Director
TUDER JEFFREY, Director
Chan Nelson, Director
Chun Kukjin, Director
Shin Hyunsoo, Director

How to read Form 4 transaction codes