Security key
36170N107
GCT Semiconductor Holding, Inc. - Common Stock, par value $0.0001 per share (GCTS)
CUSIP: 36170N107
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 3,867,323
- Total 13F value
- $4,641,395
- Share change
- +10,111
- SEC-reported price per share
- $1.20
- Number of holders
- 24
- Value change
- -$69,422
- Number of buys
- 12
- Number of sells
- 13
- Shares outstanding
- 75,138,957
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
24
Top holders
10
GCTS full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
GCT Semiconductor Holding, Inc. SEC filings
GCT Semiconductor Holding, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 36170N107
Recent filing periods:
Ownership snapshot
Top reported holders of GCTS - GCT Semiconductor Holding, Inc. - Common Stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
SUNP Corp
Disclosed value leader
SUNP Corp
Comparable rows
15/15
Latest evidence
30 Sep 2025
13D/G
3/4/5
13F
Lead comparable stake: 5.2%
13D/G row: SUNP Corp
Showing 1-6 of 15 holder rows.
Quick read
SUNP Corp leads the comparable SEC ownership view at 5.2%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens SUNP Corp's linked filing trail.
Comparable ownership
Top 5
SUNP Corp
5.2%
Concord Sponsor Group III LLC
1.3%
John Schlaefer
0.27%
Alex Sum
0.24%
Edmond Cheng
0.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| SUNP Corp |
13D/G
|
5.2%
|
$4,162,544
2,910,870 shares
|
-$1,587,905 | 30 Jun 2025 |
| Concord Sponsor Group III LLC |
13D/G
3/4/5
10%+ Owner
|
1.3%
|
$891,946
632,586 shares
|
$0 | 26 Mar 2025 |
| John Schlaefer |
3/4/5
President, CEO & Class III Dir, Director
|
0.27%
|
$273,682
202,728 shares
|
— | 26 Sep 2025 |
| Alex Sum |
3/4/5
Sr. VP of Sales and Marketing
|
0.24%
|
$248,053
183,743 shares
|
— | 19 Sep 2025 |
| Edmond Cheng |
3/4/5
Chief Financial Officer
|
0.2%
|
$203,850
151,000 shares
|
— | 19 Sep 2025 |
| VANGUARD GROUP INC |
13F
Company
|
2.1%
|
$2,407,376
1,583,800 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
24
Shares
3,867,323
Rows available
24
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
29
Q4 2025 holders
24
Holder diff
-5
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend