GCTS on NYSE
GCT Semiconductor Holding, Inc.
American semiconductors and related devices company, incorporated in Delaware.
Price unavailable
Last updated Oct 18, 2026.
Overview
Compare with Rubicon Technology, Semilux International Ltd. or Nano Labs Ltd, or pick any stock.
Financials
From the company’s reports to the SEC. Every number links to the filing it came from.
Key numbers, fiscal 2025
-63.4%Gross margin3
-1274.9%Operating margin3
-1513.3%Net margin3
-68.6%Revenue growth, 20253
-$33.1MFree cash flow3
What sells
Revenue by product, business segment and region, as the company reports it to the SEC.
Products and services
Service brought in 61% of the revenue GCT Semiconductor Holding, Inc. broke down this way in fiscal 2025.
Products and services by year
| Products and services | 2024 | 2025 |
|---|---|---|
| Service | $4.4M | $1.7M |
| Product | $4.8M | $1.1M |
Regions
United States brought in 56% of the revenue GCT Semiconductor Holding, Inc. broke down this way in fiscal 2025.
Regions by year
| Regions | 2024 | 2025 |
|---|---|---|
| United States | $4.2M | $1.6M |
| Taiwan | $195.0K | $629.0K |
| [Canada] | $322.0K | $411.0K |
| DEMember | $944.0K | $142.0K |
| South Korea | $3.5M | $82.0K |
Where the money goes
Where each dollar of revenue went, fiscal 2025
- Cost of revenue18¢$4.7M
- Research and development55¢$14.0M
- Interest24¢$6.0M
- Income tax4¢$902.0K
Out of $2.9M in revenue.3 The company lost money this year.
Financial statements
Every line of the income statement as filed: the last 2 fiscal years, latest first.3
| Period ending | 2025-12-31 | 2024-12-31 |
|---|---|---|
| Total net revenues | $2.9M | $9.1M |
| Total cost of net revenues | $4.7M | $4.1M |
| Gross profit (loss) | -$1.8M | $5.1M |
| Research and development | $14.0M | $17.3M |
| Sales and marketing | $4.2M | $3.9M |
| General and administrative | $16.5M | $10.8M |
| Gain on extinguishment of liability | $0 | -$14.6M |
| Loss on impairment of long-lived assets | $0 | $787.0K |
| Total operating expenses | $34.7M | $18.2M |
| Loss from operations | -$36.5M | -$13.1M |
| Interest expense | -$6.0M | -$3.9M |
| Gain (loss) on foreign currency transactions, net | -$784.0K | $4.7M |
| Change in fair value of common stock warrant liabilities | $880.0K | $2.2M |
| Change in fair value of convertible promissory notes | -$336.0K | -$1.5M |
| Change in fair value of common stock forward liability | $312.0K | -$586.0K |
| Other income, net | $24.0K | $213.0K |
| Loss before provision for income taxes | -$42.5M | -$11.9M |
| Provision for income taxes | $902.0K | $445.0K |
| Net loss | -$43.4M | -$12.4M |
| Net loss per common share - basic | -$0.82 | -$0.30 |
| Net loss per common share - diluted | -$0.82 | -$0.30 |
| Weighted average number of common shares used in computing net loss per common share - basic | 52.9M shares | 40.6M shares |
| Weighted average number of common shares used in computing net loss per common share - diluted | 52.9M shares | 40.6M shares |
No quarter-by-quarter statement was filed.
Every line of the balance sheet as filed: the last 4 fiscal years (annual) or 4 quarters (quarterly), latest first.3
| Period ending | 2025-12-31 | 2024-12-31 | 2024-03-31 | 2023-12-31 |
|---|---|---|---|---|
| Cash and cash equivalents | $590.0K | $1.4M | ||
| Accounts receivable, net | $2.6M | $5.7M | ||
| Inventory | $947.0K | $3.0M | ||
| Contract assets | $5.4M | $5.1M | $3.4M | |
| Prepaid expenses and other current assets | $2.3M | $2.3M | ||
| Total current assets | $11.9M | $17.6M | ||
| Property and equipment, net | $2.7M | $869.0K | ||
| Operating lease right-of-use assets | $708.0K | $849.0K | ||
| Intangibles, net | $0 | $65.0K | ||
| Other assets | $381.0K | $523.0K | ||
| Total assets | $15.6M | $19.9M | ||
| Accounts payable | $628.0K | $1.0M | ||
| Contract liabilities | $0 | $48.0K | ||
| Accrued and other current liabilities | $21.7M | $21.2M | ||
| Common stock forward liability | $3.0K | $315.0K | ||
| Borrowings | $56.6M | $37.6M | ||
| Operating lease liabilities, current | $686.0K | $697.0K | ||
| Total current liabilities | $79.6M | $60.9M | ||
| Convertible promissory notes, net of current | $6.0M | $4.9M | ||
| Net defined benefit liabilities | $7.6M | $7.1M | ||
| Long-term operating lease liabilities | $41.0K | $177.0K | ||
| Other taxes payable | $2.3M | $2.1M | ||
| Warrant liabilities | $2.9M | $3.8M | ||
| Other liabilities | $531.0K | $285.0K | ||
| Total liabilities | $98.9M | $79.2M | ||
| Common stock, par value $0.0001 per share; 400,000 shares authorized as of December 31, 2025 and 2024; 58,137 and 47,987 shares issued and outstanding as of December 31, 2025 and 2024, respectively | $6.0K | $5.0K | ||
| Additional paid-in capital | $520.9M | $501.2M | ||
| Accumulated other comprehensive income | $1.2M | $1.5M | ||
| Accumulated deficit | -$605.4M | -$562.0M | ||
| Total stockholders' deficit | -$83.3M | -$59.3M | -$115.4M | |
| Total liabilities and stockholders' deficit | $15.6M | $19.9M | ||
| Preferred stock, par value | $0.00 | $0.00 | ||
| Preferred Stock, Shares Authorized | 40.0M shares | 40.0M shares | ||
| Preferred stock, shares issued | 0 shares | 0 shares | ||
| Preferred stock, shares outstanding | 0 shares | 0 shares | ||
| Common stock, par value per share | $0.00 | $0.00 | ||
| Common Stock, Shares Authorized | 400.0M shares | 400.0M shares | ||
| Common stock, shares issued | 58.1M shares | 48.0M shares | 45.8M shares | |
| Common stock, shares outstanding | 58.1M shares | 48.0M shares |
| Period ending | 2025-12-31 | 2024-12-31 | 2024-03-31 | 2023-12-31 |
|---|---|---|---|---|
| Cash and cash equivalents | $590.0K | $1.4M | ||
| Accounts receivable, net | $2.6M | $5.7M | ||
| Inventory | $947.0K | $3.0M | ||
| Contract assets | $5.4M | $5.1M | $3.4M | |
| Prepaid expenses and other current assets | $2.3M | $2.3M | ||
| Total current assets | $11.9M | $17.6M | ||
| Property and equipment, net | $2.7M | $869.0K | ||
| Operating lease right-of-use assets | $708.0K | $849.0K | ||
| Intangibles, net | $0 | $65.0K | ||
| Other assets | $381.0K | $523.0K | ||
| Total assets | $15.6M | $19.9M | ||
| Accounts payable | $628.0K | $1.0M | ||
| Contract liabilities | $0 | $48.0K | ||
| Accrued and other current liabilities | $21.7M | $21.2M | ||
| Common stock forward liability | $3.0K | $315.0K | ||
| Borrowings | $56.6M | $37.6M | ||
| Operating lease liabilities, current | $686.0K | $697.0K | ||
| Total current liabilities | $79.6M | $60.9M | ||
| Convertible promissory notes, net of current | $6.0M | $4.9M | ||
| Net defined benefit liabilities | $7.6M | $7.1M | ||
| Long-term operating lease liabilities | $41.0K | $177.0K | ||
| Other taxes payable | $2.3M | $2.1M | ||
| Warrant liabilities | $2.9M | $3.8M | ||
| Other liabilities | $531.0K | $285.0K | ||
| Total liabilities | $98.9M | $79.2M | ||
| Common stock, par value $0.0001 per share; 400,000 shares authorized as of December 31, 2025 and 2024; 58,137 and 47,987 shares issued and outstanding as of December 31, 2025 and 2024, respectively | $6.0K | $5.0K | ||
| Additional paid-in capital | $520.9M | $501.2M | ||
| Accumulated other comprehensive income | $1.2M | $1.5M | ||
| Accumulated deficit | -$605.4M | -$562.0M | ||
| Total stockholders' deficit | -$83.3M | -$59.3M | -$115.4M | |
| Total liabilities and stockholders' deficit | $15.6M | $19.9M | ||
| Preferred stock, par value | $0.00 | $0.00 | ||
| Preferred Stock, Shares Authorized | 40.0M shares | 40.0M shares | ||
| Preferred stock, shares issued | 0 shares | 0 shares | ||
| Preferred stock, shares outstanding | 0 shares | 0 shares | ||
| Common stock, par value per share | $0.00 | $0.00 | ||
| Common Stock, Shares Authorized | 400.0M shares | 400.0M shares | ||
| Common stock, shares issued | 58.1M shares | 48.0M shares | 45.8M shares | |
| Common stock, shares outstanding | 58.1M shares | 48.0M shares |
Cash flow is reported year to date, not quarter by quarter, so there are no separate quarterly figures.
Every line of the cash flow as filed: the last 2 fiscal years, latest first.3
| Period ending | 2025-12-31 | 2024-12-31 |
|---|---|---|
| Net loss | -$43.4M | -$12.4M |
| Depreciation and amortization | $744.0K | $691.0K |
| Loss on impairment of long-lived assets | $787.0K | |
| Amortization of right-of-use assets | $707.0K | $634.0K |
| Stock-based compensation | $6.3M | $2.7M |
| Issuance of common stock to underwriter | $667.0K | |
| Change in provision for credit losses | $2.8M | -$431.0K |
| Change in fair value of warrant liabilities | -$880.0K | -$2.2M |
| Change in fair value of convertible promissory notes | $336.0K | $1.5M |
| Change in fair value of common stock forward liability | -$312.0K | $586.0K |
| Gain on extinguishment of liability | $0 | -$14.6M |
| Accounts receivable | $330.0K | -$339.0K |
| Inventory | $2.0M | -$1.5M |
| Contract assets | -$325.0K | -$1.7M |
| Prepaid expenses and other current assets | $187.0K | $1.1M |
| Other assets | $142.0K | -$327.0K |
| Accounts payable | -$402.0K | -$2.6M |
| Contract liabilities | -$48.0K | |
| Accrued and other current liabilities | $1.2M | -$3.2M |
| Net defined benefit liabilities | $536.0K | $480.0K |
| Other taxes payable | -$23.0K | $91.0K |
| Lease liabilities | -$917.0K | -$620.0K |
| Other liabilities | $244.0K | -$233.0K |
| Net cash used in operating activities | -$30.7M | -$31.0M |
| Purchases of property and equipment | -$2.4M | -$542.0K |
| Net cash used in investing activities | -$2.4M | -$542.0K |
| Proceeds from reverse recapitalization and PIPE Financing, net of transaction costs | $17.2M | |
| Proceeds from issuance of convertible promissory notes | $1.9M | $16.3M |
| Proceeds from borrowings | $21.8M | $11.9M |
| Proceeds from issuance of common stock under common stock purchase agreement | $190.0K | $8.5M |
| Proceeds from issuance of common stock under at-market agreement | $2.3M | |
| Proceeds from issuance of common stock and common stock warrants in a private placement | $2.2M | |
| Proceeds from issuance of common stock and common stock warrants in a registered direct offering | $11.0M | |
| Proceeds from exercise of stock options | $21.0K | $15.0K |
| Payment of common stock issuance costs | -$1.2M | |
| Tax withholding on restricted stock units | -$11.0K | |
| Repayments of borrowings | -$3.7M | -$14.1M |
| Repayments of convertible promissory notes | -$5.6M | |
| Net cash provided by financing activities | $32.2M | $36.5M |
| Effect of exchange rate changes on cash and cash equivalents | -$5.0K | -$3.8M |
| Net increase (decrease) in cash and cash equivalents | -$845.0K | $1.2M |
| Cash paid for interest | $5.9M | $5.2M |
| Cash paid for income taxes | $324.0K | $269.0K |
| Cash paid for operating leases | $728.0K | $744.0K |
| Issuance of common stock from conversion of convertible promissory notes | $1.1M | $41.2M |
| Settlement of common stock forward liability in equity | $271.0K | |
| Proceeds from issuance of common stock withheld for outstanding payables | $975.0K | |
| Operating lease right-of-use assets obtained in exchange for operating lease liabilities | $549.0K | $54.0K |
| Purchase of property and equipment in accrued expenses and other current liabilities | $58.0K |
No quarter-by-quarter statement was filed.
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Leadership
Who has led GCT Semiconductor Holding, Inc., and when. Pick a name to see everywhere that person has worked.
Chief executive
Chair
President
Chief financial officer
2025
- Chief executive officerJohn Schlaefer Mar 27, 2024 to now9
- Chief executive officerJeffrey Tuder Nov 3, 2021 to Nov 3, 202110
- ChairKyeongho Lee Mar 27, 2024 to Mar 27, 202411
- PresidentJohn Schlaefer Mar 27, 2024 to now9
- Chief financial officerEdmond Cheng Mar 27, 2024 to now12
- Chief financial officerMichele Cito Nov 3, 2021 to Nov 3, 202113
Board members and other officers (11)
- VP of Marketing and SalesAlex Sum Mar 27, 2024 to now14
- Vice President of FinanceDavid Yoon Mar 27, 2024 to Mar 27, 202415
- VP of Engineering & CTOJeemee Kim Mar 27, 2024 to now16
- Board memberJohn Schlaefer Mar 27, 2024 to now9
- Board memberKukjin Chun Mar 27, 2024 to now17
- Board memberKyeongho Lee Mar 27, 2024 to now18
- Board memberNelson C. Chan Mar 28, 2024 to now19
- Board memberJeffrey Tuder Nov 3, 2021 to now10
- Board memberLawrence E. Leibowitz Nov 3, 2021 to Nov 17, 202320
- Board memberPeter Ort Nov 3, 2021 to Nov 17, 202321
- Board memberThomas C. King Nov 3, 2021 to Nov 17, 202322
Former names
- Concord Acquisition Corp IIIMar 26, 2021 to Mar 28, 20242
Timeline
Filings
330 filings to the SEC since October 2021: 5 annual reports, 15 quarterly reports, 42 major events, 124 insider forms, 43 large holders, 101 other. The latest 20:
- Oct 2, 20264 EDGAR
- Oct 2, 20264 EDGAR
- Oct 2, 20264 EDGAR
- Oct 2, 20264 EDGAR
- Oct 2, 20264 EDGAR
- Oct 2, 20264 EDGAR
- Sep 18, 20268-K CURRENT REPORT EDGAR
- Sep 15, 20268-K CURRENT REPORT EDGAR
- Sep 14, 20264 EDGAR
- Sep 14, 20264 EDGAR
- Sep 14, 20264 EDGAR
- Sep 14, 20264 EDGAR
- Aug 10, 202610-Q EDGAR
- Aug 10, 20268-K CURRENT REPORT EDGAR
- Aug 3, 2026DEF 14A EDGAR
- Aug 3, 2026ARS EDGAR
- Aug 3, 2026DEFA14A EDGAR
- Jul 7, 20264 EDGAR
- Jul 2, 20264 EDGAR
- Jul 2, 20264 EDGAR
The 330 filings since October 2021 can be filtered by form type and year here when JavaScript is on.
Every filing from the last three years, summarized. The full record is on SEC EDGAR.
Insider trades and holders
Large holders
Investors who own more than 5% must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively. 43 such filings since October 2021, the latest 10:
- May 15, 2026SCHEDULE 13G/A
- Feb 13, 2026SCHEDULE 13G/A
- Aug 22, 2025SCHEDULE 13G/A
- Aug 12, 2025SCHEDULE 13G/A
- Apr 15, 2025SCHEDULE 13G
- Mar 28, 2025SCHEDULE 13G/A
- Feb 14, 2025SCHEDULE 13G
- Nov 14, 2024SC 13G/A
- Nov 13, 2024SC 13G/A
- Nov 13, 2024SC 13G/A
From Forms 4 and Schedules 13D and 13G filed with the SEC.
Held by these funds
The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 54. Change is in shares since the quarter before.
13F reports cover disclosed long positions in U.S. stocks only.
Sources
The numbers on this page point here. Each one links to the record it came from.
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11SEC EDGARKyeongho Lee, Chair
- 12
- 13
- 14SEC EDGARAlex Sum, VP of Marketing and Sales
- 15
- 16SEC EDGARJeemee Kim, VP of Engineering & CTO
- 17SEC EDGARKukjin Chun, Board member
- 18SEC EDGARKyeongho Lee, Board member
- 19SEC EDGARNelson C. Chan, Board member
- 20SEC EDGARLawrence E. Leibowitz, Board member
- 21SEC EDGARPeter Ort, Board member
- 22SEC EDGARThomas C. King, Board member