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GCT Semiconductor Holding, Inc.

GCTS Net buying

CIK 0001851961 #3997 in the set updated 21 Sep 2026

Bought (120 mo)

$2.99M

out of their own pocket, the only kind of buying there is

Sold (120 mo)

$0.00

$0.00 on a plan · $0.00 straight out of an exercise

Sold at will

$0.00

0 of 0 sales

Net

+$2.99M

+$2.99M against sales at will

By person

16 insiders · 17 transactions

Insider

Role

Bought

Sold

Net

Holding

Worth

Change

Anapass, Inc. entity

10% owner

$2.24M (1)

—

+$2.24M

8,017,466

$10.26M

—

Shin Hyunsoo

Director

$746.39K (14)

—

+$746.39K

814,068

$1.04M

+81,406,700%

Concord Sponsor Group III LLC entity

10% owner

—

8,590,312

$11.00M

+28.2%

Lee Kyeongho

Director

—

1,096,122

$1.40M

+109,612,100%

Kim Jeong-Min

Chief Technology Officer

—

402,701

$515.46K

+40,270,000%

Schlaefer John

President, CEO & Class III Dir

—

352,728

$451.49K

—

Cheng Edmond

Chief Financial Officer

—

296,000

$378.88K

—

Sum Alex

Sr. VP of Sales and Marketing

—

258,743

$331.19K

+25,874,200%

Barker Robert

Director

—

151,710

$194.19K

+15,170,900%

TUDER JEFFREY

Director

—

151,190

$193.52K

—

Chan Nelson

Director

—

134,901

$172.67K

—

Chun Kukjin

Director

—

98,636

$126.25K

—

LEIBOWITZ LAWRENCE E

Director

—

30,000

$38.40K

—

KING THOMAS C.

Director

—

30,000

$38.40K

—

Ort Peter

Director

—

30,000

$38.40K

—

Yoon David

Vice President of Finance

—

8,204

$10.50K

—

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.

Individual transactions

Insider

Date

Role

Action

Price

Amount

Shin Hyunsoo

25 Nov 2025

Director

Buy

16,725

$1.28

$21.41K

Shin Hyunsoo

21 Nov 2025

Director

Buy

3,180

$1.28

$4.07K

Shin Hyunsoo

20 Nov 2025

Director

Buy

25,453

$1.28

$32.58K

Shin Hyunsoo

12 Sep 2025

Director

Buy

44,067

$1.51

$66.54K

Shin Hyunsoo

5 Sep 2025

Director

Buy

10,300

$1.30

$13.39K

Shin Hyunsoo

4 Sep 2025

Director

Buy

8,250

$1.26

$10.40K

Shin Hyunsoo

15 Aug 2025

Director

Buy

121,000

$1.26

$152.46K

Shin Hyunsoo

10 Jun 2025

Director

Buy

45,000

$1.16

$52.20K

Shin Hyunsoo

10 Jun 2025

Director

Buy

40,000

$1.20

$48.00K

Shin Hyunsoo

5 Jun 2025

Director

Buy

21,300

$1.02

$21.73K

Shin Hyunsoo

5 Jun 2025

Director

Buy

58,700

$1.03

$60.46K

Shin Hyunsoo

4 Jun 2025

Director

Buy

80,000

$1.02

$81.60K

Shin Hyunsoo

23 May 2025

Class II Director

Buy

77,000

$1.04

$80.08K

Shin Hyunsoo

20 May 2025

Class II Director

Buy

86,000

$1.18

$101.48K

Sum Alex

19 Feb 2025

Sr. VP of Sales and Marketing

Exercised, kept

13,259

$0.11

$1.46K

Schlaefer John

13 Jan 2025

President, CEO & Class III Dir

Exercised, kept

35,669

$0.11

$3.92K

Anapass, Inc.

26 Sep 2024

10% owner

Buy

741,603

$3.02

$2.24M

What was left out

Form 4 filings counted 94

Amendments (4/A) skipped 6

Filings about a different issuer 0

Unreadable filings 0

Joint filings 0

Sales on a Rule 10b5-1 plan 0

Sales straight out of an exercise 0

Sales at will 0

Transactions with no price 0

Shares from compensation/vesting 24,628,548

History held since 17 Nov 2023