GCTS insider buying and SEC filings, explained
GCT Semiconductor Holding, Inc. · CIK 1851961
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Company profile
- Exchanges
- NYSE, NYSE
- Industry (SIC)
- Semiconductors & Related Devices
- State of incorporation
- DE
- Fiscal year end
- Dec 31
- Former names
- Concord Acquisition Corp III
Insider activity in the last 12 months
Bought
$58K
Insiders who bought
1
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Nov 25, 2025 | Purchase (code P) | Hyunsoo Shin (Director and Class II Director) bought 16,725 shares at $1.28 ($21K), reported as a purchase (code P). Holdings up 2% to 757,771 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 28, 2025 |
| Nov 20–21, 2025 | Purchase (code P) | Hyunsoo Shin (Director and Class II Director) bought 28,633 shares between Nov 20, 2025 and Nov 21, 2025 at $1.28 ($37K), reported as a purchase (code P). Holdings up 4% to 741,046 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 24, 2025 |
29 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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