XOOMAR

GCT Semiconductor Holding (GCTS)

GCT Semiconductor Holding on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on NYSE, classified by the SEC as semiconductors & related devices.

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11.9M

Short interest

settlement 2026-10-15

7.3

Days to cover

+0.6 days vs prior

76.7%

Short share of volume

2026-11-02

4,000

Fails to deliver

settlement 2026-10-13

Wed 11 Nov

Next earnings

estimated date

$0

Insider flow, 90 days

0 buys, 0 sells

As of 2026-11-02.

Short interest

FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSON

As of 15 October 2026, short interest in GCTS is 11,899,389 shares, up 864,568 shares over the last month. Over the last 48 readings it ranged from 598,002 shares (15 November 2024) to 11,899,389 shares (15 October 2026). The latest reading sits at the top of that range. At the reported average volume of 1.6M shares a day that is 7.3 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-10-1511,899,389+9.9%1,625,3227.32
2026-09-3010,828,113-1.9%1,607,0286.74
2026-09-1511,034,821+6.3%1,369,9608.05
2026-08-3110,384,103+0.0%1,839,6275.64
2026-08-1410,383,715+30.1%3,251,3493.19
2026-07-317,980,132+6.0%1,683,3244.74
2026-07-157,528,239+6.4%1,960,0323.84
2026-06-307,077,691-6.6%3,862,9541.83
2026-06-157,576,550+9.4%5,541,8281.37
2026-05-296,922,485+36.8%19,756,3491.00
2026-05-155,061,672+71.1%6,790,5891.00
2026-04-302,958,226-3.8%1,269,3242.33
2026-04-153,076,054-5.4%1,090,2372.82
2026-03-313,252,462+49.9%1,468,2472.22
2026-03-132,169,417-19.6%1,094,6481.98
2026-02-272,699,716-30.8%2,303,9751.17
2026-02-133,898,424-38.7%2,568,6251.52
2026-01-306,361,212+242.5%18,668,2701.00
2026-01-151,857,151-15.8%339,1335.48
2025-12-312,204,729+1.6%286,6147.69
2025-12-152,171,125+2.7%105,98920.48
2025-11-282,114,851+18.9%137,21615.41
2025-11-141,778,626+3.3%257,5476.91
2025-10-311,722,451+13.7%461,7213.73
2025-10-151,514,559-15.8%241,7066.27
2025-09-301,799,879-7.8%386,8574.65
2025-09-151,952,989+13.2%289,9246.74
2025-08-291,724,587-27.1%229,4787.52
2025-08-152,365,997+12.4%250,8439.43
2025-07-312,105,516+22.6%190,81711.03
2025-07-151,717,763+4.6%322,6615.32
2025-06-301,641,538+1.0%781,2002.10
2025-06-131,625,657+53.4%1,453,8721.12
2025-05-301,059,548+0.3%708,2361.50
2025-05-151,056,099+35.7%622,7481.70
2025-04-30778,244-13.1%209,5283.71
2025-04-15895,027-12.8%225,9453.96
2025-03-311,025,846+3.5%167,5536.12
2025-03-14990,657+8.0%108,3219.15
2025-02-28917,667+14.6%90,71610.12
2025-02-14800,712+11.5%128,1706.25
2025-01-31718,108+1.3%98,0357.33
2025-01-15708,586-4.5%138,3925.12
2024-12-31741,810+13.4%205,4633.61
2024-12-13653,994-6.0%162,4084.03
2024-11-29696,013+16.4%162,0334.30
2024-11-15598,002-9.1%163,3683.66
2024-10-31658,190-9.3%121,9985.40

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 2 November 2026, the short share of GCTS volume is 76.7%, up 16.6 points over the last five sessions. Over the last 30 readings it ranged from 48.2% (23 September 2026) to 76.7% (2 November 2026). The latest reading sits at the top of that range. The latest reading is 14.6 points above the 30-session average of 62.1%, on 1.5M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-11-021.1M1.5M76.7%149,252
2026-10-30947K1.8M53.8%11,431
2026-10-29389K674K57.8%1,573
2026-10-28595K992K60.0%2,350
2026-10-27685K1.1M62.0%645
2026-10-26554K922K60.1%210
2026-10-23317K568K55.9%11,542
2026-10-22579K1.1M53.5%1,205
2026-10-21466K728K64.1%3,360
2026-10-20699K1.1M63.9%1,817
2026-10-19801K1.1M73.5%131,422
2026-10-16865K1.4M63.1%9,798
2026-10-15885K1.2M72.8%2,847
2026-10-14609K936K65.1%2
2026-10-13326K506K64.3%100
2026-10-12682K1.0M67.0%17,668
2026-10-09504K854K59.1%0
2026-10-08315K543K58.0%0
2026-10-07315K546K57.7%0
2026-10-06403K684K59.0%1,803
2026-10-05306K533K57.4%100
2026-10-02445K619K71.9%0
2026-10-01378K574K65.9%4,207
2026-09-30323K593K54.5%906
2026-09-29418K631K66.3%0
2026-09-28383K679K56.4%0
2026-09-25279K435K64.1%270
2026-09-24321K494K64.9%14,751
2026-09-23279K578K48.2%0
2026-09-22418K629K66.5%200

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 13 October 2026, the fails-to-deliver balance in GCTS is 4,000 shares, down 11,675 shares over the last settlement date. Over the last 30 readings it ranged from 3 shares (23 September 2026) to 118,922 shares (10 August 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-10-134,000$1.93$8K
2026-10-0515,675$2.25$35K
2026-09-258,950$2.24$20K
2026-09-2420,819$2.16$45K
2026-09-233$2.20$7
2026-09-2131,165$2.07$65K
2026-09-1820,291$2.06$42K
2026-09-1726$1.91$50
2026-09-162,249$1.92$4K
2026-09-1546,987$1.87$88K
2026-09-1456,965$1.91$109K
2026-09-117,625$1.86$14K
2026-09-018,647$1.80$16K
2026-08-3112,717$1.86$24K
2026-08-2810,446$1.91$20K
2026-08-2416,439$2.04$34K
2026-08-216,270$1.99$12K
2026-08-1975,208$1.93$145K
2026-08-181,560$2.09$3K
2026-08-135,959$2.17$13K
2026-08-1231,902$2.04$65K
2026-08-119,641$2.45$24K
2026-08-10118,922$2.55$303K
2026-08-065,475$2.27$12K
2026-08-0325,048$1.86$47K
2026-07-281,518$1.98$3K
2026-07-227,857$2.17$17K
2026-07-2059$2.10$124
2026-07-1717,556$2.12$37K
2026-07-152,724$2.39$7K

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for GCTS in the last 90 days. The most recent filings are listed below. Latest filing: Lee Kyeongho (Director, Chairman & Class III Director) on 2026-09-30.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-30Lee KyeonghoDirector, Chairman & Class III DirectorGrant13K$0.00$01.1M
2026-09-30TUDER JEFFREYDirector, Class III DirectorGrant13K$0.00$0164K
2026-09-30Shin HyunsooDirector, Class II DirectorGrant13K$0.00$0827K
2026-09-30Chun KukjinDirector, Class I DirectorGrant13K$0.00$0112K
2026-09-30Chan NelsonDirector, Class I DirectorGrant13K$0.00$0148K
2026-09-30Barker RobertDirector, Class II DirectorGrant13K$0.00$0165K
2026-09-10Sum AlexSr. VP of Sales and MarketingGrant75K$0.00$0259K
2026-09-10Schlaefer JohnPresident, CEO & Class III DirGrant150K$0.00$0353K
2026-09-10Kim Jeong-MinChief Technology OfficerGrant100K$0.00$0403K
2026-09-10Cheng EdmondChief Financial OfficerGrant145K$0.00$0296K
2026-06-30Lee KyeonghoDirector, Chairman & Class III DirectorGrant9K$0.00$01.1M
2026-06-30Shin HyunsooDirector, Class II DirectorGrant9K$0.00$0814K
2026-06-30Chun KukjinDirector, Class I DirectorGrant9K$0.00$099K
2026-06-30Chan NelsonDirector, Class I DirectorGrant9K$0.00$0135K
2026-06-30Barker RobertDirector, Class II DirectorGrant9K$0.00$0152K
2026-06-30TUDER JEFFREYDirector, Class III DirectorGrant9K$0.00$0151K
2026-03-31TUDER JEFFREYDirector, Class III DirectorGrant24K$0.00$0142K
2026-03-31Lee KyeonghoDirector, Chairman & Class III DirectorGrant24K$0.00$01.1M
2026-03-31Shin HyunsooDirector, Class II DirectorGrant24K$0.00$0805K
2026-03-31Chun KukjinDirector, Class I DirectorGrant24K$0.00$089K
2026-03-31Chan NelsonDirector, Class I DirectorGrant24K$0.00$0126K
2026-03-31Barker RobertDirector, Class II DirectorGrant24K$0.00$0142K
2026-02-23Chun KukjinDirector, Class I DirectorGift40K$0.00$065K
2025-12-31TUDER JEFFREYDirector, Class III DirectorGrant23K$0.00$0118K
2025-12-31Lee KyeonghoDirector, Chairman & Class III DirectorGrant23K$0.00$01.1M
2025-12-31Shin HyunsooDirector, Class II DirectorGrant23K$0.00$0781K
2025-12-31Chun KukjinDirector, Class I DirectorGrant23K$0.00$0105K
2025-12-31Chan NelsonDirector, Class I DirectorGrant23K$0.00$0102K
2025-12-31Barker RobertDirector, Class II DirectorGrant23K$0.00$0118K
2025-11-25Shin HyunsooDirector, Class II DirectorBuy17K$1.28$21K758K
2025-11-21Shin HyunsooDirector, Class II DirectorBuy3K$1.28$4K741K
2025-11-20Shin HyunsooDirector, Class II DirectorBuy25K$1.28$33K738K
2025-09-30Shin HyunsooDirector, Class II DirectorGrant18K$0.00$0712K
2025-09-30Lee KyeonghoDirector, Chairman & Class III DirectorGrant18K$0.00$01.0M
2025-09-30Chun KukjinDirector, Class I DirectorGrant18K$0.00$082K
2025-09-30Chan NelsonDirector, Class I DirectorGrant18K$0.00$079K
2025-09-30Barker RobertDirector, Class II DirectorGrant18K$0.00$095K
2025-09-30TUDER JEFFREYDirector, Class III DirectorGrant18K$0.00$095K
2025-09-26Schlaefer JohnPresident, CEO & Class III DirOther transaction555$0.00$0203K
2025-09-19Kim Jeong-MinChief Technology OfficerGrant75K$0.00$0303K
2025-09-19Schlaefer JohnPresident, CEO & Class III DirGrant75K$0.00$0202K
2025-09-19Sum AlexSr. VP of Sales and MarketingGrant75K$0.00$0184K
2025-09-19Cheng EdmondChief Financial OfficerGrant75K$0.00$0151K
2025-09-12Shin HyunsooDirector, Class II DirectorBuy44K$1.51$67K694K
2025-09-05Shin HyunsooDirector, Class II DirectorBuy10K$1.30$13K650K
2025-09-04Shin HyunsooDirector, Class II DirectorBuy8K$1.26$10K640K
2025-08-15Shin HyunsooDirector, Class II DirectorBuy121K$1.26$152K632K
2025-06-30TUDER JEFFREYDirector, Class III DirectorGrant18K$0.00$077K
2025-06-30Shin HyunsooDirector, Class II DirectorGrant18K$0.00$0511K
2025-06-30Lee KyeonghoDirector, Chairman & Class III DirectorGrant18K$0.00$01.0M
2025-06-30Chun KukjinDirector, Class I DirectorGrant18K$0.00$064K
2025-06-30Chan NelsonDirector, Class I DirectorGrant18K$0.00$061K
2025-06-30Barker RobertDirector, Class II DirectorGrant18K$0.00$077K
2025-06-10Shin HyunsooDirector, Class II DirectorBuy45K$1.16$52K492K
2025-06-10Shin HyunsooDirector, Class II DirectorBuy40K$1.20$48K447K
2025-06-05Shin HyunsooDirector,OtherBuy21K$1.02$22K407K
2025-06-05Shin HyunsooDirector,OtherBuy59K$1.03$60K386K
2025-06-04Shin HyunsooDirector,OtherBuy80K$1.02$82K327K
2025-05-23Shin HyunsooClass II DirectorBuy77K$1.04$80K247K
2025-05-20Shin HyunsooClass II DirectorBuy86K$1.18$101K170K
2025-03-31Chan NelsonDirector,OtherGrant17K$0.00$042K
2025-03-31TUDER JEFFREYDirector,OtherGrant17K$0.00$042K
2025-03-31Lee KyeonghoDirector,OtherGrant17K$0.00$01.0M
2025-03-31Chun KukjinDirector,OtherGrant17K$0.00$046K
2025-03-31Shin HyunsooDirector,OtherGrant17K$0.00$084K
2025-03-31Barker RobertDirector,OtherGrant17K$0.00$059K
2025-03-26TUDER JEFFREYDirector,OtherOther transaction16Kprice not stated in the filingnot stated58K
2025-03-26Concord Sponsor Group III LLCTenPercentOwnerOther transaction3.1Mprice not stated in the filingnot stated633K
2025-02-19Sum AlexSr. VP of Sales and MarketingExercise or conversion13K$0.11$1K109K
2025-01-13Schlaefer JohnPresident, CEO & Class III DirExercise or conversion36K$0.11$4K127K
2024-12-31Barker RobertDirector,OtherGrant12K$0.00$041K
2024-12-31CHAN NELSON CDirector,OtherGrant12K$0.00$025K
2024-12-31Chun KukjinDirector,OtherGrant12K$0.00$029K
2024-12-31Lee KyeonghoDirector,OtherGrant12K$0.00$01.7M
2024-12-31Shin HyunsooDirector,OtherGrant12K$0.00$068K
2024-12-31TUDER JEFFREYDirector,OtherGrant12K$0.00$025K
2024-12-16Shin HyunsooDirector,OtherGrant37K$2.57$95K56K
2024-12-13Shin HyunsooDirector,OtherGrant200$2.50$50019K
2024-12-13Shin HyunsooDirector,OtherGrant800$2.50$2K19K
2024-09-30Barker RobertDirector,OtherGrant8K$0.00$029K
2024-09-30CHAN NELSON CDirector,OtherGrant8K$0.00$013K
2024-09-30Chun KukjinDirector,OtherGrant8K$0.00$017K
2024-09-30Lee KyeonghoDirector,OtherGrant8K$0.00$01.7M
2024-09-30Shin HyunsooDirector,OtherGrant8K$0.00$018K
2024-09-30TUDER JEFFREYDirector,OtherGrant8K$0.00$013K
2024-09-26Anapass, Inc.TenPercentOwnerBuy742K$3.02$2.2M8.0M
2024-08-21Cheng EdmondChief Financial OfficerGrant76K$0.00$076K
2024-06-30Barker RobertDirector,OtherGrant5K$0.00$021K
2024-06-30CHAN NELSON CDirector,OtherGrant5K$0.00$05K
2024-06-30Chun KukjinDirector,OtherGrant5K$0.00$09K
2024-06-30Lee KyeonghoDirector,OtherGrant5K$0.00$01.7M
2024-06-30Shin HyunsooDirector,OtherGrant5K$0.00$010K
2024-06-30TUDER JEFFREYDirector,OtherGrant5K$0.00$05K
2024-03-26Kim JeemeeVP of Engineering & CTOGrant12K$0.00$0228K
2024-03-26Kim JeemeeVP of Engineering & CTOGrant215K$0.00$0215K
2024-03-26Barker RobertDirector,OtherGrant13K$0.00$013K
2024-03-26Barker RobertDirector,OtherGrant4K$0.00$017K
2024-03-26Sum AlexSr. VP of Sales and MarketingGrant90K$0.00$090K
2024-03-26Lee KyeonghoDirector,OtherGrant868K$0.00$0868K
2024-03-26Lee KyeonghoDirector,OtherGrant93K$0.00$093K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

No holder on file reports 5% or more of GCTS in its latest filing.

FiledFormHolderSharesOf classEvent
2026-05-1513G/Ano. 3TD SECURITIES (USA) LLCbroker-dealer3.5M4.6%2026-03-31
2026-05-1513G/Ano. 3TORONTO DOMINION BANKnon-US institution00.0%2026-03-31
2026-05-1513G/Ano. 3TD GROUP US HOLDINGS LLCparent holding company00.0%2026-03-31
2026-05-1513G/Ano. 3TORONTO DOMINION HOLDINGS USA INCparent holding company00.0%2026-03-31

13F holders

Tracked managers holding GCTS at their latest 13F. JSON

4 of the 30 tracked managers held GCTS at their latest 13F, $5.5M in total at quarter-end prices. Renaissance Technologies is the largest at $5.0M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 0 cut.

FundQuarterSharesValueOf portfolioChange in shares
Renaissance Technologies2026-06-301.7M$5.0M0.01%new
Citadel Advisors2026-06-3077K$229K0.00%new
Millennium Management2026-06-3032K$95K0.00%new
Two Sigma Investments2026-06-3032K$94K0.00%new

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

What this page is

GCT Semiconductor Holding in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows GCT Semiconductor Holding (GCTS), SEC CIK 1851961, listed on NYSE, classified by the SEC as semiconductors & related devices. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest
FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-13.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-05-15.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Earnings dates
SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-10.JSON and CSV
Insider trades
SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-09-30.JSON and CSV
Company record
EDGAR filing index for CIK 1851961Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
10 requests a minute without a key, 30 with a free key from a free account.

How to read it

  • Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
  • Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
  • Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Datasets

Frequently Asked Questions

How much of GCTS is sold short?
11,899,389 shares were held short at the 2026-10-15 settlement, 7.3 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is GCTS's daily short volume?
On 2026-11-02, 1,125,976 of the 1,467,462 GCTS shares reported to FINRA were sold short, 76.7% of the day's reported volume. Short volume is a flow for one day, not a position.
Does GCTS have fails to deliver?
The SEC's latest file shows 4,000 GCTS shares failed to deliver at settlement 2026-10-13. Fails are reported per settlement date and published twice a month with a lag.
Are GCTS insiders buying or selling?
No open-market insider trades were reported for GCTS in the last 90 days. The most recent filings are listed below. Latest filing: Lee Kyeongho (Director, Chairman & Class III Director) on 2026-09-30.
Who owns 5% or more of GCTS?
No holder on file reports 5% or more of GCTS in its latest filing.
Which tracked 13F managers own GCTS?
4 of the 30 tracked 13F managers held GCTS shares at their latest filing, $5.5M in all. The largest: Renaissance Technologies (1.7M shares, $5.0M), Ken Griffin's Citadel Advisors (77K shares, $229K), Izzy Englander's Millennium Management (32K shares, $95K), Two Sigma Investments (32K shares, $94K).

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.