GCTS · GCT Semiconductor Holding, Inc. · Shareholders & Ownership

$1.28 +0.01 (+0.79%) Q2 2026 earnings call transcript

Market Cap

$116.80M

91.97M

Volume · Oct 28 2.11M Avg daily vol (3M) 1.94M

Every disclosed holder of GCTS in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns GCTS

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	59	12,970,433	14.10%	Yes
Insiders (Forms 3, 4, 5)	0	0	0.00%	No
13D/G-only blocks	8	21,702,136	23.60%	Yes
Remaining	—	57,297,157	62.30%	Rest
Registered funds (N-PORT, not summed)	11	3,929,961	4.27%	No

Shares outstanding: 91,969,726, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of GCTS

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	COWEN AND COMPANY, LLC 13G CIK 48966 · Broker-dealer · Sep 30, 2024 Rule 13d-1(b), qualified institution	3,743,950	4.07%	—	Sep 30, 2024	Rule 13d-1(b), qualified institution
2	TD SECURITIES (USA) LLC 13G CIK 803012 · Broker-dealer · Mar 31, 2026 Rule 13d-1(b), qualified institution	3,456,392	3.76%	-236,715	Mar 31, 2026	Rule 13d-1(b), qualified institution
3	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,999,130	3.26%	+1,254,181	Jun 30, 2026	carried, not yet filed for the newest quarter
4	SUNP Corp 13G CIK 2062913 · Non-US institution · Jun 30, 2025 Rule 13d-1(c), passive investor	2,910,870	3.17%	-1,110,423	Jun 30, 2025	Rule 13d-1(c), passive investor
5	Global Coretech Growth Fund 1 13G CIK 2018158 · Unknown · Apr 17, 2024 Rule 13d-1(c), passive investor	2,248,875	2.45%	0	Apr 17, 2024	Rule 13d-1(c), passive investor
6	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	2,145,646	2.33%	+940,700	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
7	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,695,300	1.84%	+1,695,300	Jun 30, 2026	carried, not yet filed for the newest quarter
8	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,296,433	1.41%	+1,296,433	Jun 30, 2026	carried, not yet filed for the newest quarter
9	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,281,164	1.39%	+683,217	Jun 30, 2026	carried, not yet filed for the newest quarter
9.1	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	212,062	0.23%	+108,919	Jun 30, 2026	iShares Trust, not summed
10	Lee Kyeongho Insider CIK 1542776 · Sep 30, 2026 Director, issuer-wide, not summed	1,109,093	1.21%	+12,971	Sep 30, 2026	Director, issuer-wide, not summed
11	Shin Hyunsoo Insider CIK 2007757 · Sep 30, 2026 Director, issuer-wide, not summed	827,039	0.90%	+12,971	Sep 30, 2026	Director, issuer-wide, not summed
12	TUDOR INVESTMENT CORP ET AL 13F CIK 923093 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	818,485	0.89%	+818,485	Jun 30, 2026	carried, not yet filed for the newest quarter
13	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	800,086	0.87%	+293,640	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
14	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	767,459	0.83%	+293,113	Jun 30, 2026	carried, not yet filed for the newest quarter
15	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	646,238	0.70%	+608,875	Jun 30, 2026	carried, not yet filed for the newest quarter
16	Concord Sponsor Group III LLC 13G CIK 1891676 · Unknown · Mar 26, 2025 Rule 13d-1(d), exempt investor	632,586	0.69%	—	Mar 26, 2025	Rule 13d-1(d), exempt investor
16.1	Concord Sponsor Group III LLC Insider CIK 1891676 · Mar 26, 2025 10% Owner, issuer-wide, not summed	632,586	0.69%	-4,359,540	Mar 26, 2025	10% Owner, issuer-wide, not summed
17	Robertson Stephens Wealth Management, LLC 13F CIK 1767307 · Registered investment adviser · Sep 30, 2026	455,500	0.50%	+305,500	Sep 30, 2026
18	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	416,917	0.45%	+170,673	Jun 30, 2026	carried, not yet filed for the newest quarter
19	Kim Jeong-Min Insider CIK 2007834 · Sep 10, 2026 Chief Technology Officer, issuer-wide, not summed	402,701	0.44%	+100,000	Sep 10, 2026	Chief Technology Officer, issuer-wide, not summed
20	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	353,089	0.38%	+112,500	Jun 30, 2026	carried, not yet filed for the newest quarter
21	Schlaefer John Insider CIK 1542775 · Sep 10, 2026 Director, President, CEO & Class III Dir, issuer-wide, not summed	352,728	0.38%	+150,000	Sep 10, 2026	Director, President, CEO & Class III Dir, issuer-wide, not summed
22	Periscope Capital Inc. 13G CIK 1695320 · Exempt reporting adviser · Sep 30, 2024 Rule 13d-1(b), qualified institution	300,000	0.33%	—	Sep 30, 2024	Rule 13d-1(b), qualified institution
23	Cheng Edmond Insider CIK 1491155 · Sep 10, 2026 Chief Financial Officer, issuer-wide, not summed	296,000	0.32%	+145,000	Sep 10, 2026	Chief Financial Officer, issuer-wide, not summed
24	Sum Alex Insider CIK 1543349 · Sep 10, 2026 Sr. VP of Sales and Marketing, issuer-wide, not summed	258,743	0.28%	+75,000	Sep 10, 2026	Sr. VP of Sales and Marketing, issuer-wide, not summed
25	Informed Momentum Co LLC 13F CIK 1510989 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	241,246	0.26%	+241,246	Jun 30, 2026	carried, not yet filed for the newest quarter
26	MOORE CAPITAL MANAGEMENT, LP 13G CIK 1448574 · Registered investment adviser · Sep 30, 2024 Rule 13d-1(d), exempt investor	196,250	0.21%	—	Sep 30, 2024	Rule 13d-1(d), exempt investor
27	XTX Topco Ltd 13F CIK 1828301 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	164,717	0.18%	+139,038	Jun 30, 2026	carried, not yet filed for the newest quarter
28	Barker Robert Insider CIK 2007837 · Sep 30, 2026 Director, issuer-wide, not summed	164,681	0.18%	+12,971	Sep 30, 2026	Director, issuer-wide, not summed
29	TUDER JEFFREY Insider CIK 1671976 · Sep 30, 2026 Director, issuer-wide, not summed	164,161	0.18%	+12,971	Sep 30, 2026	Director, issuer-wide, not summed
30	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	155,346	0.17%	+92,645	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Chan Nelson Insider CIK 1242653 · Sep 30, 2026 Director, issuer-wide, not summed	147,872	0.16%	+12,971	Sep 30, 2026	Director, issuer-wide, not summed
32	SEI INVESTMENTS CO 13F CIK 350894 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	142,901	0.16%	+142,901	Jun 30, 2026	carried, not yet filed for the newest quarter
33	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	133,082	0.14%	+133,082	Jun 30, 2026	carried, not yet filed for the newest quarter
34	Team Hewins, LLC 13F CIK 1964760 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	125,640	0.14%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Asset Management One Co., Ltd. 13F CIK 1068855 · Registered investment adviser · Sep 30, 2026	124,610	0.14%	+124,610	Sep 30, 2026
36	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	112,837	0.12%	+45,324	Jun 30, 2026	carried, not yet filed for the newest quarter
36.1	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Aug 31, 2026 GOLDMAN SACHS TRUST, not summed	45,438	0.05%	-57,381	Aug 31, 2026	GOLDMAN SACHS TRUST, not summed
37	Chun Kukjin Insider CIK 2007838 · Sep 30, 2026 Director, issuer-wide, not summed	111,607	0.12%	+12,971	Sep 30, 2026	Director, issuer-wide, not summed
38	ExodusPoint Capital Management, LP 13F CIK 1736225 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	88,539	0.10%	+88,539	Jun 30, 2026	carried, not yet filed for the newest quarter
39	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	77,168	0.08%	+77,168	Jun 30, 2026	carried, not yet filed for the newest quarter
40	BRIDGEWAY CAPITAL MANAGEMENT, LLC 13F CIK 1107261 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	75,000	0.08%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
40.1	Ultra-Small Company Market Fund Fund S000004424 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	75,000	0.08%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
41	Caitong International Asset Management Co., Ltd 13F CIK 1963355 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	65,817	0.07%	+65,798	Jun 30, 2026	carried, not yet filed for the newest quarter
42	Focus Partners Wealth 13F CIK 1542153 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	64,000	0.07%	+64,000	Jun 30, 2026	carried, not yet filed for the newest quarter
43	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	63,164	0.07%	+151	Jun 30, 2026	carried, not yet filed for the newest quarter
44	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	58,713	0.06%	+58,713	Jun 30, 2026	carried, not yet filed for the newest quarter
45	BRC Group Holdings, Inc. 13F CIK 1464790 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	56,818	0.06%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
46	ROYAL BANK OF CANADA 13F CIK 1000275 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	49,213	0.05%	+46,956	Jun 30, 2026	carried, not yet filed for the newest quarter
47	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	43,532	0.05%	+24,243	Jun 30, 2026	carried, not yet filed for the newest quarter
48	Jefferies Financial Group Inc. 13F CIK 96223 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	39,400	0.04%	+39,400	Jun 30, 2026	carried, not yet filed for the newest quarter
49	Spark Investment Management LLC 13F CIK 1554871 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	37,100	0.04%	+37,100	Jun 30, 2026	carried, not yet filed for the newest quarter
50	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	31,956	0.03%	+31,956	Jun 30, 2026	carried, not yet filed for the newest quarter

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 81 holders

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Key facts CIK 1851961 CUSIP 36170N107 13F (30d) 5 filings 5 filers Visit website Investor relations