Every 424B that SEALSQ Corp (LAES) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 424B covers the supplement that carries the terms of a priced offering, so if you follow LAES and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full LAES filings page.
SEALSQ Corp is offering 22,913,630 Ordinary Shares and related warrants in a registered direct offering. The offering also includes Pre-funded Warrants to purchase up to 7,500,000 Ordinary Shares and Class E Warrants exercisable for up to 60,827,260 Ordinary Shares. The combined public offering price per Ordinary Share (or Pre-funded Warrant) with accompanying Class E Warrant is $4.11 (Pre-funded: $4.1099), and the company estimates net proceeds of approximately $117,000,000.
Shares outstanding were 192,210,129 as of March 13, 2026. Proceeds are intended primarily to fund the company’s post-quantum and quantum commercialization roadmap and for general corporate purposes.
SEALSQ Corp filed a prospectus supplement to register up to 67,359,998 Ordinary Shares for resale by selling shareholders. The registered shares consist of 14,026,666 shares issuable upon exercise of Pre‑funded Warrants and 53,333,332 shares issuable upon exercise of Class D Warrants. The company is not selling these shares and will not receive any proceeds from their resale.
The Pre‑funded Warrants are exercisable at $0.0001 per share and the Class D Warrants are exercisable at $9.25 per share. These Private Warrants were issued alongside a registered direct sale of 12,640,000 shares at $7.50 per share, with total gross proceeds from that combined transaction of $200,000,000 before fees. SEALSQ’s Ordinary Shares trade on Nasdaq as “LAES,” with a last reported price of $6.67 on October 17, 2025.
As context, shares outstanding were 177,400,997 as of October 17, 2025. The warrants include a Beneficial Ownership Limitation that generally caps exercises at 4.99%, adjustable up to 9.99% with notice. The company will bear registration expenses, while selling holders will bear any selling commissions.
SEALSQ Corp (LAES) launched a registered direct offering of 12,640,000 Ordinary Shares at $7.50 per share, issuing the shares under a prospectus supplement and securities purchase agreement. Gross proceeds are $94.8 million, with estimated net proceeds of approximately $88.8 million after a 6.0% placement fee and expenses. The company’s Ordinary Shares outstanding are expected to be 175,400,997 after the offering.
SEALSQ engaged Maxim Group LLC as sole placement agent on a reasonable best efforts basis. The company intends to use proceeds for general corporate purposes, including deploying next‑generation post‑quantum semiconductor and ASIC capabilities in the U.S., working capital, capital expenditures, debt repayment or redemption, potential share repurchases, and acquisitions or strategic investments.
In a concurrent private placement, SEALSQ is selling unregistered Pre‑funded Warrants for up to 14,026,666 shares and unregistered Class D Warrants for up to 53,333,332 shares, with Class D Warrants immediately exercisable at $9.25 for seven years. A 90‑day lock‑up applies to the company’s directors, officers and certain affiliates, alongside issuance restrictions for 60 days, subject to stated exceptions.
SEALSQ Corp is offering Ordinary Shares with Class C Warrants and Pre-funded Warrants at an offering price of $4.60 (Pre-funded Warrants at $4.599), producing $65,543,950 of proceeds to the company before expenses. The prospectus shows 151,662,873 Ordinary Shares outstanding after the offering (or 183,962,873 if the Pre-funded and Class C Warrants are fully exercised). The company reports a pro forma net tangible book value per share of $0.95 as of June 30, 2025 and indicates dilution to new investors of $3.00 per Ordinary Share.
Net proceeds are earmarked for general corporate purposes including deployment of next-generation post-quantum semiconductor technology and ASIC capabilities in the U.S., working capital, capital expenditures, debt repayment, stock repurchases, and possible acquisitions. SEALSQ highlights product and market items: two post-quantum secure microcontrollers targeted for market release in Q4 2025, VaultIC secure microcontrollers for IoT, PKI-as-a-Service (INeS), and personalization services with a claimed four-week provisioning capability. The filing discloses risks including supply-chain constraints, industry cyclicality, ability to commercialize post-quantum products, liquidity sufficiency, and dependence on parent-company services from WISeKey.