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.
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. JSONAs 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.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/gcts" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 11,899,389 | +9.9% | 1,625,322 | 7.32 |
| 2026-09-30 | 10,828,113 | -1.9% | 1,607,028 | 6.74 |
| 2026-09-15 | 11,034,821 | +6.3% | 1,369,960 | 8.05 |
| 2026-08-31 | 10,384,103 | +0.0% | 1,839,627 | 5.64 |
| 2026-08-14 | 10,383,715 | +30.1% | 3,251,349 | 3.19 |
| 2026-07-31 | 7,980,132 | +6.0% | 1,683,324 | 4.74 |
| 2026-07-15 | 7,528,239 | +6.4% | 1,960,032 | 3.84 |
| 2026-06-30 | 7,077,691 | -6.6% | 3,862,954 | 1.83 |
| 2026-06-15 | 7,576,550 | +9.4% | 5,541,828 | 1.37 |
| 2026-05-29 | 6,922,485 | +36.8% | 19,756,349 | 1.00 |
| 2026-05-15 | 5,061,672 | +71.1% | 6,790,589 | 1.00 |
| 2026-04-30 | 2,958,226 | -3.8% | 1,269,324 | 2.33 |
| 2026-04-15 | 3,076,054 | -5.4% | 1,090,237 | 2.82 |
| 2026-03-31 | 3,252,462 | +49.9% | 1,468,247 | 2.22 |
| 2026-03-13 | 2,169,417 | -19.6% | 1,094,648 | 1.98 |
| 2026-02-27 | 2,699,716 | -30.8% | 2,303,975 | 1.17 |
| 2026-02-13 | 3,898,424 | -38.7% | 2,568,625 | 1.52 |
| 2026-01-30 | 6,361,212 | +242.5% | 18,668,270 | 1.00 |
| 2026-01-15 | 1,857,151 | -15.8% | 339,133 | 5.48 |
| 2025-12-31 | 2,204,729 | +1.6% | 286,614 | 7.69 |
| 2025-12-15 | 2,171,125 | +2.7% | 105,989 | 20.48 |
| 2025-11-28 | 2,114,851 | +18.9% | 137,216 | 15.41 |
| 2025-11-14 | 1,778,626 | +3.3% | 257,547 | 6.91 |
| 2025-10-31 | 1,722,451 | +13.7% | 461,721 | 3.73 |
| 2025-10-15 | 1,514,559 | -15.8% | 241,706 | 6.27 |
| 2025-09-30 | 1,799,879 | -7.8% | 386,857 | 4.65 |
| 2025-09-15 | 1,952,989 | +13.2% | 289,924 | 6.74 |
| 2025-08-29 | 1,724,587 | -27.1% | 229,478 | 7.52 |
| 2025-08-15 | 2,365,997 | +12.4% | 250,843 | 9.43 |
| 2025-07-31 | 2,105,516 | +22.6% | 190,817 | 11.03 |
| 2025-07-15 | 1,717,763 | +4.6% | 322,661 | 5.32 |
| 2025-06-30 | 1,641,538 | +1.0% | 781,200 | 2.10 |
| 2025-06-13 | 1,625,657 | +53.4% | 1,453,872 | 1.12 |
| 2025-05-30 | 1,059,548 | +0.3% | 708,236 | 1.50 |
| 2025-05-15 | 1,056,099 | +35.7% | 622,748 | 1.70 |
| 2025-04-30 | 778,244 | -13.1% | 209,528 | 3.71 |
| 2025-04-15 | 895,027 | -12.8% | 225,945 | 3.96 |
| 2025-03-31 | 1,025,846 | +3.5% | 167,553 | 6.12 |
| 2025-03-14 | 990,657 | +8.0% | 108,321 | 9.15 |
| 2025-02-28 | 917,667 | +14.6% | 90,716 | 10.12 |
| 2025-02-14 | 800,712 | +11.5% | 128,170 | 6.25 |
| 2025-01-31 | 718,108 | +1.3% | 98,035 | 7.33 |
| 2025-01-15 | 708,586 | -4.5% | 138,392 | 5.12 |
| 2024-12-31 | 741,810 | +13.4% | 205,463 | 3.61 |
| 2024-12-13 | 653,994 | -6.0% | 162,408 | 4.03 |
| 2024-11-29 | 696,013 | +16.4% | 162,033 | 4.30 |
| 2024-11-15 | 598,002 | -9.1% | 163,368 | 3.66 |
| 2024-10-31 | 658,190 | -9.3% | 121,998 | 5.40 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs 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.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 1.1M | 1.5M | 76.7% | 149,252 |
| 2026-10-30 | 947K | 1.8M | 53.8% | 11,431 |
| 2026-10-29 | 389K | 674K | 57.8% | 1,573 |
| 2026-10-28 | 595K | 992K | 60.0% | 2,350 |
| 2026-10-27 | 685K | 1.1M | 62.0% | 645 |
| 2026-10-26 | 554K | 922K | 60.1% | 210 |
| 2026-10-23 | 317K | 568K | 55.9% | 11,542 |
| 2026-10-22 | 579K | 1.1M | 53.5% | 1,205 |
| 2026-10-21 | 466K | 728K | 64.1% | 3,360 |
| 2026-10-20 | 699K | 1.1M | 63.9% | 1,817 |
| 2026-10-19 | 801K | 1.1M | 73.5% | 131,422 |
| 2026-10-16 | 865K | 1.4M | 63.1% | 9,798 |
| 2026-10-15 | 885K | 1.2M | 72.8% | 2,847 |
| 2026-10-14 | 609K | 936K | 65.1% | 2 |
| 2026-10-13 | 326K | 506K | 64.3% | 100 |
| 2026-10-12 | 682K | 1.0M | 67.0% | 17,668 |
| 2026-10-09 | 504K | 854K | 59.1% | 0 |
| 2026-10-08 | 315K | 543K | 58.0% | 0 |
| 2026-10-07 | 315K | 546K | 57.7% | 0 |
| 2026-10-06 | 403K | 684K | 59.0% | 1,803 |
| 2026-10-05 | 306K | 533K | 57.4% | 100 |
| 2026-10-02 | 445K | 619K | 71.9% | 0 |
| 2026-10-01 | 378K | 574K | 65.9% | 4,207 |
| 2026-09-30 | 323K | 593K | 54.5% | 906 |
| 2026-09-29 | 418K | 631K | 66.3% | 0 |
| 2026-09-28 | 383K | 679K | 56.4% | 0 |
| 2026-09-25 | 279K | 435K | 64.1% | 270 |
| 2026-09-24 | 321K | 494K | 64.9% | 14,751 |
| 2026-09-23 | 279K | 578K | 48.2% | 0 |
| 2026-09-22 | 418K | 629K | 66.5% | 200 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs 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.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-13 | 4,000 | $1.93 | $8K |
| 2026-10-05 | 15,675 | $2.25 | $35K |
| 2026-09-25 | 8,950 | $2.24 | $20K |
| 2026-09-24 | 20,819 | $2.16 | $45K |
| 2026-09-23 | 3 | $2.20 | $7 |
| 2026-09-21 | 31,165 | $2.07 | $65K |
| 2026-09-18 | 20,291 | $2.06 | $42K |
| 2026-09-17 | 26 | $1.91 | $50 |
| 2026-09-16 | 2,249 | $1.92 | $4K |
| 2026-09-15 | 46,987 | $1.87 | $88K |
| 2026-09-14 | 56,965 | $1.91 | $109K |
| 2026-09-11 | 7,625 | $1.86 | $14K |
| 2026-09-01 | 8,647 | $1.80 | $16K |
| 2026-08-31 | 12,717 | $1.86 | $24K |
| 2026-08-28 | 10,446 | $1.91 | $20K |
| 2026-08-24 | 16,439 | $2.04 | $34K |
| 2026-08-21 | 6,270 | $1.99 | $12K |
| 2026-08-19 | 75,208 | $1.93 | $145K |
| 2026-08-18 | 1,560 | $2.09 | $3K |
| 2026-08-13 | 5,959 | $2.17 | $13K |
| 2026-08-12 | 31,902 | $2.04 | $65K |
| 2026-08-11 | 9,641 | $2.45 | $24K |
| 2026-08-10 | 118,922 | $2.55 | $303K |
| 2026-08-06 | 5,475 | $2.27 | $12K |
| 2026-08-03 | 25,048 | $1.86 | $47K |
| 2026-07-28 | 1,518 | $1.98 | $3K |
| 2026-07-22 | 7,857 | $2.17 | $17K |
| 2026-07-20 | 59 | $2.10 | $124 |
| 2026-07-17 | 17,556 | $2.12 | $37K |
| 2026-07-15 | 2,724 | $2.39 | $7K |
Insider trades
SEC Form 4, newest first. JSONNo 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.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | Lee Kyeongho | Director, Chairman & Class III Director | Grant | 13K | $0.00 | $0 | 1.1M |
| 2026-09-30 | TUDER JEFFREY | Director, Class III Director | Grant | 13K | $0.00 | $0 | 164K |
| 2026-09-30 | Shin Hyunsoo | Director, Class II Director | Grant | 13K | $0.00 | $0 | 827K |
| 2026-09-30 | Chun Kukjin | Director, Class I Director | Grant | 13K | $0.00 | $0 | 112K |
| 2026-09-30 | Chan Nelson | Director, Class I Director | Grant | 13K | $0.00 | $0 | 148K |
| 2026-09-30 | Barker Robert | Director, Class II Director | Grant | 13K | $0.00 | $0 | 165K |
| 2026-09-10 | Sum Alex | Sr. VP of Sales and Marketing | Grant | 75K | $0.00 | $0 | 259K |
| 2026-09-10 | Schlaefer John | President, CEO & Class III Dir | Grant | 150K | $0.00 | $0 | 353K |
| 2026-09-10 | Kim Jeong-Min | Chief Technology Officer | Grant | 100K | $0.00 | $0 | 403K |
| 2026-09-10 | Cheng Edmond | Chief Financial Officer | Grant | 145K | $0.00 | $0 | 296K |
| 2026-06-30 | Lee Kyeongho | Director, Chairman & Class III Director | Grant | 9K | $0.00 | $0 | 1.1M |
| 2026-06-30 | Shin Hyunsoo | Director, Class II Director | Grant | 9K | $0.00 | $0 | 814K |
| 2026-06-30 | Chun Kukjin | Director, Class I Director | Grant | 9K | $0.00 | $0 | 99K |
| 2026-06-30 | Chan Nelson | Director, Class I Director | Grant | 9K | $0.00 | $0 | 135K |
| 2026-06-30 | Barker Robert | Director, Class II Director | Grant | 9K | $0.00 | $0 | 152K |
| 2026-06-30 | TUDER JEFFREY | Director, Class III Director | Grant | 9K | $0.00 | $0 | 151K |
| 2026-03-31 | TUDER JEFFREY | Director, Class III Director | Grant | 24K | $0.00 | $0 | 142K |
| 2026-03-31 | Lee Kyeongho | Director, Chairman & Class III Director | Grant | 24K | $0.00 | $0 | 1.1M |
| 2026-03-31 | Shin Hyunsoo | Director, Class II Director | Grant | 24K | $0.00 | $0 | 805K |
| 2026-03-31 | Chun Kukjin | Director, Class I Director | Grant | 24K | $0.00 | $0 | 89K |
| 2026-03-31 | Chan Nelson | Director, Class I Director | Grant | 24K | $0.00 | $0 | 126K |
| 2026-03-31 | Barker Robert | Director, Class II Director | Grant | 24K | $0.00 | $0 | 142K |
| 2026-02-23 | Chun Kukjin | Director, Class I Director | Gift | 40K | $0.00 | $0 | 65K |
| 2025-12-31 | TUDER JEFFREY | Director, Class III Director | Grant | 23K | $0.00 | $0 | 118K |
| 2025-12-31 | Lee Kyeongho | Director, Chairman & Class III Director | Grant | 23K | $0.00 | $0 | 1.1M |
| 2025-12-31 | Shin Hyunsoo | Director, Class II Director | Grant | 23K | $0.00 | $0 | 781K |
| 2025-12-31 | Chun Kukjin | Director, Class I Director | Grant | 23K | $0.00 | $0 | 105K |
| 2025-12-31 | Chan Nelson | Director, Class I Director | Grant | 23K | $0.00 | $0 | 102K |
| 2025-12-31 | Barker Robert | Director, Class II Director | Grant | 23K | $0.00 | $0 | 118K |
| 2025-11-25 | Shin Hyunsoo | Director, Class II Director | Buy | 17K | $1.28 | $21K | 758K |
| 2025-11-21 | Shin Hyunsoo | Director, Class II Director | Buy | 3K | $1.28 | $4K | 741K |
| 2025-11-20 | Shin Hyunsoo | Director, Class II Director | Buy | 25K | $1.28 | $33K | 738K |
| 2025-09-30 | Shin Hyunsoo | Director, Class II Director | Grant | 18K | $0.00 | $0 | 712K |
| 2025-09-30 | Lee Kyeongho | Director, Chairman & Class III Director | Grant | 18K | $0.00 | $0 | 1.0M |
| 2025-09-30 | Chun Kukjin | Director, Class I Director | Grant | 18K | $0.00 | $0 | 82K |
| 2025-09-30 | Chan Nelson | Director, Class I Director | Grant | 18K | $0.00 | $0 | 79K |
| 2025-09-30 | Barker Robert | Director, Class II Director | Grant | 18K | $0.00 | $0 | 95K |
| 2025-09-30 | TUDER JEFFREY | Director, Class III Director | Grant | 18K | $0.00 | $0 | 95K |
| 2025-09-26 | Schlaefer John | President, CEO & Class III Dir | Other transaction | 555 | $0.00 | $0 | 203K |
| 2025-09-19 | Kim Jeong-Min | Chief Technology Officer | Grant | 75K | $0.00 | $0 | 303K |
| 2025-09-19 | Schlaefer John | President, CEO & Class III Dir | Grant | 75K | $0.00 | $0 | 202K |
| 2025-09-19 | Sum Alex | Sr. VP of Sales and Marketing | Grant | 75K | $0.00 | $0 | 184K |
| 2025-09-19 | Cheng Edmond | Chief Financial Officer | Grant | 75K | $0.00 | $0 | 151K |
| 2025-09-12 | Shin Hyunsoo | Director, Class II Director | Buy | 44K | $1.51 | $67K | 694K |
| 2025-09-05 | Shin Hyunsoo | Director, Class II Director | Buy | 10K | $1.30 | $13K | 650K |
| 2025-09-04 | Shin Hyunsoo | Director, Class II Director | Buy | 8K | $1.26 | $10K | 640K |
| 2025-08-15 | Shin Hyunsoo | Director, Class II Director | Buy | 121K | $1.26 | $152K | 632K |
| 2025-06-30 | TUDER JEFFREY | Director, Class III Director | Grant | 18K | $0.00 | $0 | 77K |
| 2025-06-30 | Shin Hyunsoo | Director, Class II Director | Grant | 18K | $0.00 | $0 | 511K |
| 2025-06-30 | Lee Kyeongho | Director, Chairman & Class III Director | Grant | 18K | $0.00 | $0 | 1.0M |
| 2025-06-30 | Chun Kukjin | Director, Class I Director | Grant | 18K | $0.00 | $0 | 64K |
| 2025-06-30 | Chan Nelson | Director, Class I Director | Grant | 18K | $0.00 | $0 | 61K |
| 2025-06-30 | Barker Robert | Director, Class II Director | Grant | 18K | $0.00 | $0 | 77K |
| 2025-06-10 | Shin Hyunsoo | Director, Class II Director | Buy | 45K | $1.16 | $52K | 492K |
| 2025-06-10 | Shin Hyunsoo | Director, Class II Director | Buy | 40K | $1.20 | $48K | 447K |
| 2025-06-05 | Shin Hyunsoo | Director,Other | Buy | 21K | $1.02 | $22K | 407K |
| 2025-06-05 | Shin Hyunsoo | Director,Other | Buy | 59K | $1.03 | $60K | 386K |
| 2025-06-04 | Shin Hyunsoo | Director,Other | Buy | 80K | $1.02 | $82K | 327K |
| 2025-05-23 | Shin Hyunsoo | Class II Director | Buy | 77K | $1.04 | $80K | 247K |
| 2025-05-20 | Shin Hyunsoo | Class II Director | Buy | 86K | $1.18 | $101K | 170K |
| 2025-03-31 | Chan Nelson | Director,Other | Grant | 17K | $0.00 | $0 | 42K |
| 2025-03-31 | TUDER JEFFREY | Director,Other | Grant | 17K | $0.00 | $0 | 42K |
| 2025-03-31 | Lee Kyeongho | Director,Other | Grant | 17K | $0.00 | $0 | 1.0M |
| 2025-03-31 | Chun Kukjin | Director,Other | Grant | 17K | $0.00 | $0 | 46K |
| 2025-03-31 | Shin Hyunsoo | Director,Other | Grant | 17K | $0.00 | $0 | 84K |
| 2025-03-31 | Barker Robert | Director,Other | Grant | 17K | $0.00 | $0 | 59K |
| 2025-03-26 | TUDER JEFFREY | Director,Other | Other transaction | 16K | price not stated in the filing | not stated | 58K |
| 2025-03-26 | Concord Sponsor Group III LLC | TenPercentOwner | Other transaction | 3.1M | price not stated in the filing | not stated | 633K |
| 2025-02-19 | Sum Alex | Sr. VP of Sales and Marketing | Exercise or conversion | 13K | $0.11 | $1K | 109K |
| 2025-01-13 | Schlaefer John | President, CEO & Class III Dir | Exercise or conversion | 36K | $0.11 | $4K | 127K |
| 2024-12-31 | Barker Robert | Director,Other | Grant | 12K | $0.00 | $0 | 41K |
| 2024-12-31 | CHAN NELSON C | Director,Other | Grant | 12K | $0.00 | $0 | 25K |
| 2024-12-31 | Chun Kukjin | Director,Other | Grant | 12K | $0.00 | $0 | 29K |
| 2024-12-31 | Lee Kyeongho | Director,Other | Grant | 12K | $0.00 | $0 | 1.7M |
| 2024-12-31 | Shin Hyunsoo | Director,Other | Grant | 12K | $0.00 | $0 | 68K |
| 2024-12-31 | TUDER JEFFREY | Director,Other | Grant | 12K | $0.00 | $0 | 25K |
| 2024-12-16 | Shin Hyunsoo | Director,Other | Grant | 37K | $2.57 | $95K | 56K |
| 2024-12-13 | Shin Hyunsoo | Director,Other | Grant | 200 | $2.50 | $500 | 19K |
| 2024-12-13 | Shin Hyunsoo | Director,Other | Grant | 800 | $2.50 | $2K | 19K |
| 2024-09-30 | Barker Robert | Director,Other | Grant | 8K | $0.00 | $0 | 29K |
| 2024-09-30 | CHAN NELSON C | Director,Other | Grant | 8K | $0.00 | $0 | 13K |
| 2024-09-30 | Chun Kukjin | Director,Other | Grant | 8K | $0.00 | $0 | 17K |
| 2024-09-30 | Lee Kyeongho | Director,Other | Grant | 8K | $0.00 | $0 | 1.7M |
| 2024-09-30 | Shin Hyunsoo | Director,Other | Grant | 8K | $0.00 | $0 | 18K |
| 2024-09-30 | TUDER JEFFREY | Director,Other | Grant | 8K | $0.00 | $0 | 13K |
| 2024-09-26 | Anapass, Inc. | TenPercentOwner | Buy | 742K | $3.02 | $2.2M | 8.0M |
| 2024-08-21 | Cheng Edmond | Chief Financial Officer | Grant | 76K | $0.00 | $0 | 76K |
| 2024-06-30 | Barker Robert | Director,Other | Grant | 5K | $0.00 | $0 | 21K |
| 2024-06-30 | CHAN NELSON C | Director,Other | Grant | 5K | $0.00 | $0 | 5K |
| 2024-06-30 | Chun Kukjin | Director,Other | Grant | 5K | $0.00 | $0 | 9K |
| 2024-06-30 | Lee Kyeongho | Director,Other | Grant | 5K | $0.00 | $0 | 1.7M |
| 2024-06-30 | Shin Hyunsoo | Director,Other | Grant | 5K | $0.00 | $0 | 10K |
| 2024-06-30 | TUDER JEFFREY | Director,Other | Grant | 5K | $0.00 | $0 | 5K |
| 2024-03-26 | Kim Jeemee | VP of Engineering & CTO | Grant | 12K | $0.00 | $0 | 228K |
| 2024-03-26 | Kim Jeemee | VP of Engineering & CTO | Grant | 215K | $0.00 | $0 | 215K |
| 2024-03-26 | Barker Robert | Director,Other | Grant | 13K | $0.00 | $0 | 13K |
| 2024-03-26 | Barker Robert | Director,Other | Grant | 4K | $0.00 | $0 | 17K |
| 2024-03-26 | Sum Alex | Sr. VP of Sales and Marketing | Grant | 90K | $0.00 | $0 | 90K |
| 2024-03-26 | Lee Kyeongho | Director,Other | Grant | 868K | $0.00 | $0 | 868K |
| 2024-03-26 | Lee Kyeongho | Director,Other | Grant | 93K | $0.00 | $0 | 93K |
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. JSONNo holder on file reports 5% or more of GCTS in its latest filing.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-05-15 | 13G/Ano. 3 | TD SECURITIES (USA) LLCbroker-dealer | 3.5M | 4.6% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 3 | TORONTO DOMINION BANKnon-US institution | 0 | 0.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 3 | TD GROUP US HOLDINGS LLCparent holding company | 0 | 0.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 3 | TORONTO DOMINION HOLDINGS USA INCparent holding company | 0 | 0.0% | 2026-03-31 |
13F holders
Tracked managers holding GCTS at their latest 13F. JSON4 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.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Renaissance Technologies | 2026-06-30 | 1.7M | $5.0M | 0.01% | new |
| Citadel Advisors | 2026-06-30 | 77K | $229K | 0.00% | new |
| Millennium Management | 2026-06-30 | 32K | $95K | 0.00% | new |
| Two Sigma Investments | 2026-06-30 | 32K | $94K | 0.00% | 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.
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Datasets
Frequently Asked Questions
How much of GCTS is sold short?
What is GCTS's daily short volume?
Does GCTS have fails to deliver?
Are GCTS insiders buying or selling?
Who owns 5% or more of GCTS?
Which tracked 13F managers own GCTS?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.