GCT Semiconductor Holding, Inc.
US ˙ NYSE

SecurityGCTS / GCT Semiconductor Holding, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership240,589 shares
Latest Disclosed Value $ 274,271
State Street Corp reports 66.28% increase in ownership of GCTS / GCT Semiconductor Holding, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 240,589 shares of GCT Semiconductor Holding, Inc. (US:GCTS) valued at $274,271 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 144,689 shares of GCT Semiconductor Holding, Inc.. This represents a change in shares of 66.28% during the quarter. The current value of the position is $765,073 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F GCT SEMICONDUCTOR HLDG COMMON STOCK 36170N107 240,589 95,900 66.28 274 58.38 0.0000
2026-02-13 2025-12-31 13F GCT SEMICONDUCTOR HLDG COMMON STOCK 36170N107 144,689 11,800 8.88 174 -13.93 0.0000
2025-11-14 2025-09-30 13F GCT SEMICONDUCTOR HLDG COMMON STOCK 36170N107 132,889 0 0.00 202 1.52 0.0000
2025-08-14 2025-06-30 13F GCT SEMICONDUCTOR HLDG COMMON STOCK 36170N107 132,889 -30,995 -18.91 198 -26.12 0.0000
2025-05-15 2025-03-31 13F GCT SEMICONDUCTOR HLDG COMMON STOCK 36170N107 163,884 1,200 0.74 269 -29.29 0.0000
2025-02-14 2024-12-31 13F GCT SEMICONDUCTOR HLDG COMMON STOCK 36170N107 162,684 12,589 8.39 379 -24.50 0.0000
2024-11-14 2024-09-30 13F GCT SEMICONDUCTOR HLDG COMMON STOCK 36170N107 150,095 14,786 10.93 503 -28.69 0.0000
2024-08-14 2024-06-30 13F GCT SEMICONDUCTOR HLDG COMMON STOCK 36170N107 135,309 135,309 705 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.