Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

SEALSQ Corp

CIK 0001951222LAES· quarter ending 2026-06-30

Shares outstanding

191,525,129

as of 2025-12-31 · 20-F cover page, filed 2026-03-31

Held by 13F filers

12,305,962

6.4% of shares outstanding

Holders

108

+23 vs 2026-03-31 · 39 new, 16 exited

Value

$38.7M

shares -65.3% vs prior quarter

Share classes (cover page of the 20-F filed 2026-03-31, as of 2025-12-31)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	LAES · NASDAQ	191,525,129	12,305,962	6.4%	108	G79483106

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	G79483106	ORD SHS	108	12,305,962	191,525,129	6.4%	$38.7M	6 call / 4 put	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (108 of 108 · G79483106)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	UBS Group AG	1,361,471	0.71%	$4.3M	+428,080 (+45.9%)
2	Bank of New York Mellon Corp	1,242,296	0.65%	$3.9M	+1,124,462 (+954.3%)
3	HRT FINANCIAL LP	1,131,645	0.59%	$3.6M	+420,076 (+59.0%)
4	TWO SIGMA INVESTMENTS, LP	1,103,028	0.58%	$3.5M	NEW
5	Kessler Investment Group, LLC	975,458	0.51%	$3.1M	-18,321 (-1.8%)
6	BARCLAYS PLC	514,556	0.27%	$1.6M	NEW
7	TUDOR INVESTMENT CORP ET AL	484,909	0.25%	$1.5M	NEW
8	Man Group plc	367,260	0.19%	$1.2M	NEW
9	SBI Securities Co., Ltd.	331,008	0.17%	$1.0M	+77,693 (+30.7%)
10	XTX Topco Ltd	323,249	0.17%	$1.0M	+269,453 (+500.9%)
11	WIM INVESTMENT MANAGEMENT Ltd	229,600	0.12%	$723K	NEW
12	GOLDMAN SACHS GROUP INC	215,800	0.11%	$680K	+141,893 (+192.0%)
13	Headlands Technologies LLC	199,989	0.10%	$630K	NEW
14	Squarepoint Ops LLC	179,854	0.09%	$567K	+99,924 (+125.0%)
15	Virtu Financial LLC	176,009	0.09%	$554K	+91,418 (+108.1%)
16	Vident Advisory, LLC	170,752	0.09%	$538K	+9,272 (+5.7%)
17	LPL Financial LLC	159,446	0.08%	$502K	+88,908 (+126.0%)
18	CITIGROUP INC	158,471	0.08%	$499K	+99,478 (+168.6%)
19	BlackRock, Inc.	152,173	0.08%	$479K	+126,599 (+495.0%)
20	Cambridge Investment Research Advisors, Inc.	138,946	0.07%	$438K	+60,592 (+77.3%)
21	NORTHERN TRUST CORP	123,863	0.06%	$390K	NEW
22	Zurcher Kantonalbank (Zurich Cantonalbank)	116,343	0.06%	$366K	+63,956 (+122.1%)
23	Virtue Capital Management, LLC	112,000	0.06%	$353K	-3,000 (-2.6%)
24	Caitong International Asset Management Co., Ltd	110,524	0.06%	$348K	+96,973 (+715.6%)
25	PEAK6 LLC	109,559	0.06%	$345K	-76,985 (-41.3%)
26	BANK OF AMERICA CORP /DE/	102,006	0.05%	$321K	NEW
27	STATE STREET CORP	101,100	0.05%	$318K	+1,042 (+1.0%)
28	Finer Wealth Management, Inc.	100,451	0.05%	$316K	—
29	WINTON GROUP Ltd	97,500	0.05%	$307K	NEW
30	RAYMOND JAMES FINANCIAL INC	93,963	0.05%	$296K	+51,353 (+120.5%)
31	GEODE CAPITAL MANAGEMENT, LLC	84,554	0.04%	$266K	+9,041 (+12.0%)
32	DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	75,398	0.04%	$238K	-93,562 (-55.4%)
33	MYDA Advisors LLC	75,000	0.04%	$236K	NEW
34	MORGAN STANLEY	74,974	0.04%	$236K	+21,178 (+39.4%)
35	Tyche Wealth Partners LLC	72,600	0.04%	$229K	+28,000 (+62.8%)
36	Quadrature Capital Ltd	66,258	0.03%	$209K	NEW
37	Curbstone Financial Management Corp	60,000	0.03%	$189K	+20,000 (+50.0%)
38	COMMONWEALTH EQUITY SERVICES, LLC	53,142	0.03%	$167K	-350 (-0.7%)
39	McGuire Investment Group, LLC	50,049	0.03%	$158K	+10,183 (+25.5%)
40	Cetera Investment Advisers	47,978	0.03%	$151K	+9,508 (+24.7%)
41	JPMORGAN CHASE & CO	47,513	0.02%	$153K	-58,681 (-55.3%)
42	OSAIC HOLDINGS, INC.	46,400	0.02%	$146K	+36,402 (+364.1%)
43	SIMPLEX TRADING, LLC	40,017	0.02%	$126K	-40,189 (-50.1%)
44	Quantbot Technologies LP	39,947	0.02%	$126K	NEW
45	WILLIAM JOHN SEMPOLINSKI	39,700	0.02%	$125K	NEW
46	MILLENNIUM MANAGEMENT LLC	38,809	0.02%	$122K	-274,858 (-87.6%)
47	AXQ CAPITAL, LP	38,000	0.02%	$120K	NEW
48	Harel Insurance Investments & Financial Services Ltd.	33,570	0.02%	$106K	+5,000 (+17.5%)
49	SG Americas Securities, LLC	31,970	0.02%	$101K	NEW
50	LaSalle St. Investment Advisors, LLC	30,200	0.02%	$95K	+3,000 (+11.0%)
51	SUSQUEHANNA INTERNATIONAL GROUP, LLP	29,104	0.02%	$92K	-1,291,389 (-97.8%)
52	Convergence Financial, LLC	28,432	0.01%	$90K	+14,216 (+100.0%)
53	Marathon Trading Investment Management LLC	28,300	0.01%	$89K	-21,900 (-43.6%)
54	State of Wyoming	26,369	0.01%	$83K	-8,267 (-23.9%)
55	Creative Planning	25,562	0.01%	$81K	NEW
56	STEPHENS INC /AR/	25,440	0.01%	$80K	NEW
57	NFSG Corp	25,050	0.01%	$79K	-1,500 (-5.6%)
58	Clearstead Advisors, LLC	25,000	0.01%	$79K	NEW
59	VICTORY CAPITAL MANAGEMENT INC	24,848	0.01%	$78K	NEW
60	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	23,059	0.01%	$9K	NEW
61	CI INVESTMENTS INC.	22,055	0.01%	$69K	+9,586 (+76.9%)
62	Global Assets Advisory, LLC	21,762	0.01%	$68K	NEW
63	NorthCrest Asset Manangement, LLC	19,373	0.01%	$56K	NEW
64	GREAT VALLEY ADVISOR GROUP, INC.	19,128	0.01%	$60K	—
65	JONES FINANCIAL COMPANIES LLLP	17,068	0.01%	$53K	+7,081 (+70.9%)
66	Resurgent Financial Advisors LLC	16,150	0.01%	$51K	+400 (+2.5%)
67	Engineers Gate Manager LP	15,688	0.01%	$49K	-76,346 (-83.0%)
68	Ballentine Partners, LLC	14,154	0.01%	$45K	NEW
69	NATIONAL BANK OF CANADA /FI/	13,314	0.01%	$42K	+2,159 (+19.4%)
70	WELLS FARGO & COMPANY/MN	12,985	0.01%	$41K	+6,020 (+86.4%)
71	Crestwood Advisors Group, LLC	12,556	0.01%	$40K	NEW
72	CAPTRUST FINANCIAL ADVISORS	12,482	0.01%	$39K	NEW
73	Gladstone Institutional Advisory LLC	11,918	0.01%	$38K	NEW
74	Larson Financial Group LLC	11,209	0.01%	$35K	+10,411 (+1304.6%)
75	Asset One Wealth Management LLC	10,725	0.01%	$28K	NEW
76	DKM Wealth Management, Inc.	10,000	0.01%	$32K	—
77	NewEdge Advisors, LLC	10,000	0.01%	$32K	-463 (-4.4%)
78	Farther Finance Advisors, LLC	7,642	0.00%	$24K	+4,998 (+189.0%)
79	Federation des caisses Desjardins du Quebec	7,000	0.00%	$22K	—
80	IFP Advisors, Inc	6,615	0.00%	$21K	-175 (-2.6%)
81	SIGNATUREFD, LLC	5,562	0.00%	$18K	+4,558 (+454.0%)
82	BROWN BROTHERS HARRIMAN & CO	5,361	0.00%	$17K	—
83	MCGUIRE CAPITAL ADVISORS INC	5,017	0.00%	$16K	+15 (+0.3%)
84	US BANCORP \DE\	4,002	0.00%	$13K	+3,852 (+2568.0%)
85	Arax Advisory Partners	2,604	0.00%	$8K	NEW
86	Leonteq Securities AG	2,500	0.00%	$8K	NEW
87	Global Retirement Partners, LLC	2,477	0.00%	$8K	NEW
88	Allworth Financial LP	2,201	0.00%	$7K	-23,018 (-91.3%)
89	Rockefeller Capital Management L.P.	2,113	0.00%	$7K	+617 (+41.2%)
90	Blue Trust, Inc.	2,000	0.00%	$6K	—
91	BARRETT & COMPANY, INC.	1,870	0.00%	$6K	+1,400 (+297.9%)
92	ROYAL BANK OF CANADA	1,664	0.00%	$5K	+1,418 (+576.4%)
93	LRI Investments, LLC	1,000	0.00%	$3K	—
94	Cape Investment Advisory, Inc.	950	0.00%	$3K	NEW
95	Hurley Capital, LLC	764	0.00%	$2K	—
96	Vision Retirement, LLC	650	0.00%	$2K	NEW
97	PNC Financial Services Group, Inc.	500	0.00%	$2K	NEW
98	BNP PARIBAS FINANCIAL MARKETS	482	0.00%	$2K	—
99	MassMutual Private Wealth & Trust, FSB	400	0.00%	$1K	—
100	Continuum Advisory, LLC	342	0.00%	$1K	NEW
101	Meramec Financial Planners, LLC	250	0.00%	$620	—
102	Game Plan Financial Advisors, LLC	225	0.00%	$709	NEW
103	Bare Financial Services, Inc	210	0.00%	$662	NEW
104	Crewe Advisors LLC	200	0.00%	$630	—
105	Forum Finance Group S.A.	200	0.00%	$1K	NEW
106	Golden State Wealth Management, LLC	72	0.00%	$227	—
107	Abound Wealth Management	41	0.00%	$130	NEW
108	EverSource Wealth Advisors, LLC	9	0.00%	$28	NEW

Exited since 2026-03-31 (16 filers; largest 16 shown)

Anson Funds Management LP	−24,915,396
HEIGHTS CAPITAL MANAGEMENT, INC	−3,136,465
MANGROVE PARTNERS IM, LLC	−168,918
True Vision MN LLC	−85,124
Valmark Advisers, Inc.	−39,664
Meridian Wealth Management, LLC	−27,335
Genesis Financial Group, LLC	−15,000
Marex Group plc	−10,705
TD Waterhouse Canada Inc.	−3,500
Tower Research Capital LLC (TRC)	−3,087
Parallel Advisors, LLC	−731
TFC Financial Management, Inc.	−445
CWM, LLC	−388
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	−186
Truvestments Capital LLC	−100
FNY Investment Advisers, LLC	−32

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Amin Nathoo	SCHEDULE 13G/A	2026-08-14	2026-06-30	10,059,050	4.9%
Anson Advisors Inc.	SCHEDULE 13G/A	2026-08-14	2026-06-30	10,059,050	4.9%
Anson Funds Management LP	SCHEDULE 13G/A	2026-08-14	2026-06-30	10,059,050	4.9%
Anson Management GP LLC	SCHEDULE 13G/A	2026-08-14	2026-06-30	10,059,050	4.9%
Moez Kassam	SCHEDULE 13G/A	2026-08-14	2026-06-30	10,059,050	4.9%
Tony Moore	SCHEDULE 13G/A	2026-08-14	2026-06-30	10,059,050	4.9%
CVI Investments, Inc.	SCHEDULE 13G/A	2026-05-15	2026-03-31	24,377,058	9.9%
Heights Capital Management, Inc.	SCHEDULE 13G/A	2026-05-15	2026-03-31	24,377,058	9.9%
Susquehanna Securities, LLC	SCHEDULE 13G/A	2026-05-15	2026-03-31	12,134,793	5.4%
WISeKey International Holding AG	SCHEDULE 13G/A	2025-07-29	2025-06-30	6,001,200	4.85%
L1 Capital Global Opportunities Master Fund, Ltd.	SCHEDULE 13G/A	2025-02-13	2024-12-31	0	0%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.