QT IMAGING HOLDINGS, INC.

EFFECT effective

SEC effectiveness notice

SEC declared the registration statement effective, allowing the offering to proceed.

First tracked pre-IPO filing for this issuer.

QT Imaging Holdings, Inc. filed an S-3 registration statement with the SEC, effective April 3, 2026. This follows a previous POS AM filing on March 31, 2026, suggesting updates to the company's securities offering framework. The current filing indicates readiness to launch an IPO or secondary offering under the S-3 shelf registration rules.

2026-04-03 · 9999999995-26-001087

EFFECT effective

SEC effectiveness notice

SEC declared the registration statement effective, allowing the offering to proceed.

Follows 8-A12B and marks the registration effective.

QT Imaging Holdings, Inc. has received effectiveness for its securities registration, enabling its common stock to trade on The Nasdaq Stock Market LLC. The filing references the previously filed Registration Statement on Form S-1/A, which includes detailed descriptions of the common stock. The company's registration under Section 12(b) of the Securities Exchange Act of 1934 confirms its compliance with regulatory requirements for public trading.

2026-03-31 · 9999999995-26-001015

EFFECT effective

SEC effectiveness notice

SEC declared the registration statement effective, allowing the offering to proceed.

Follows EFFECT and marks the registration effective.

QT Imaging Holdings, Inc. filed a Notice of Effectiveness for a Post-Effective Amendment (POS AM) on March 31, 2026. The filing confirms the SEC has accepted the updated registration statement, though no substantive content is provided beyond standard administrative details. The previous filing on the same date shares identical metadata except for differing Accession and File Numbers, suggesting a revised submission.

2026-03-31 · 9999999995-26-001008

EFFECT effective

SEC effectiveness notice

SEC declared the registration statement effective, allowing the offering to proceed.

Follows EFFECT and marks the registration effective.

QT Imaging Holdings, Inc. filed a Notice of Effectiveness for its IPO registration statement on March 31, 2026. The filing confirms SEC acceptance of the offering, but no substantive content details are provided in the visible text.

2026-03-31 · 9999999995-26-001006

8-A12B effective

Exchange Act registration

Registration filed to list the securities under the Exchange Act ahead of trading.

Follows EFFECT and registers the class of securities for exchange listing.

QT Imaging Holdings, Inc. filed Form 8-A12B to register its common stock, par value $0.0001 per share, for listing on The Nasdaq Stock Market LLC. The filing incorporates by reference the common stock description from its previously effective S-1/A registration statement (File No. 333-291237), which was initially filed on November 3, 2025. No exhibits are required, as the securities are registered under Section 12(b) and no other securities of the company are currently registered on Nasdaq.

2026-01-27 · 0001628280-26-003568

EFFECT effective

SEC effectiveness notice

SEC declared the registration statement effective, allowing the offering to proceed.

Follows S-1/A and marks the registration effective.

QT Imaging Holdings, Inc. has filed an S-1 registration statement for an IPO, with the filing becoming effective on December 31, 2025. The company operates in the imaging sector, with disclosures indicating financial activities including convertible notes, bridge loans, and private placements. Previous filings show restatements and adjustments to equity components, suggesting ongoing financial restructuring.

2025-12-31 · 9999999995-26-000013

S-1/A amended

Amended registration statement

Updated registration statement filed after SEC comments or deal changes.

Updates the prior S-1 filing.

QT Imaging Holdings, Inc. amended its S-1 filing (S-1/A) on 2025-12-29, updating financial disclosures and adding details about subsequent events, equity transactions, and contingent liabilities. The filing includes expanded data on accounts receivable, revenue concentration, and derivative instruments, reflecting ongoing operational and financial developments.

2025-12-29 · 0001628280-25-058960

S-1 filed

Initial registration statement

Initial public filing submitted to start the SEC review process.

Follows EFFECT in the pre-IPO sequence.

QT Imaging Holdings, Inc. has filed an S-1 registration statement for its upcoming IPO, indicating preparation for public market entry. The filing includes detailed financial data, shareholder agreements, and risk disclosures. Previous effectiveness notice (EFFECT) likely confirmed the registration's validity, while the current S-1 provides expanded disclosures on capital structure, business operations, and risk factors.

2025-11-03 · 0001628280-25-048373

EFFECT effective

SEC effectiveness notice

SEC declared the registration statement effective, allowing the offering to proceed.

Follows S-1/A and marks the registration effective.

The current filing represents the notice of effectiveness for QT Imaging Holdings, Inc.'s S-1 registration statement, indicating the SEC has accepted the filing for registration. No substantive updates or amendments are visible in the provided text compared to the previous S-1/A filing, which suggests the document primarily contains technical or metadata elements rather than revised disclosures.

2025-02-05 · 9999999995-25-000323

S-1/A amended

Amended registration statement

Updated registration statement filed after SEC comments or deal changes.

Updates the prior S-1 filing.

QT Imaging Holdings, Inc. amended its S-1 filing (S-1/A) on 2025-01-31, incorporating updates to financial disclosures, new investor agreements, and subsequent events post-filing. The amendment includes details on convertible notes, working capital notes, and additional subscription agreements, reflecting ongoing capital structure adjustments and business development activities.

2025-01-31 · 0001628280-25-003316

S-1 filed

Initial registration statement

Initial public filing submitted to start the SEC review process.

Follows EFFECT in the pre-IPO sequence.

QT Imaging Holdings, Inc. has filed an S-1 registration statement for an initial public offering (IPO), indicating preparations for stock market listing. The filing includes updated financial data, details on equity transactions, and disclosures related to loans, agreements, and risk factors. The company's financials show ongoing operations with a focus on research and development, and it references multiple financing activities, including bridge loans and private placements.

2025-01-16 · 0001628280-25-001723

EFFECT effective

SEC effectiveness notice

SEC declared the registration statement effective, allowing the offering to proceed.

Follows S-1/A and marks the registration effective.

The SEC has declared the registration of QT Imaging Holdings, Inc.'s securities effective, allowing the company to proceed with its initial public offering (IPO) on May 22, 2024. The filing confirms the effectiveness of the S-1 registration statement, though no additional details about the offering terms or financials are provided in the current document.

2024-05-22 · 9999999995-24-001618

S-1/A amended

Amended registration statement

Updated registration statement filed after SEC comments or deal changes.

Updates the prior S-1/A filing.

QT Imaging Holdings, Inc. has updated its S-1/A filing, reflecting retrospective financial adjustments for the Business Combination and updated financial data as of December 31, 2023. The filing includes revised disclosures related to accounting treatments, loan agreements, and equity structures, with a focus on aligning prior financial statements with current reporting standards.

2024-05-20 · 0001193125-24-141936

S-1/A amended

Amended registration statement

Updated registration statement filed after SEC comments or deal changes.

Updates the prior S-1/A filing.

The current S-1/A filing for QT Imaging Holdings, Inc. includes retrospective adjustments to financial statements as of December 31, 2023, due to the accounting treatment of a business combination, affecting prior year figures. The filing highlights ongoing financial and operational disclosures, including research and development expenditures for ultrasound scanner development and customer concentration risks.

2024-05-16 · 0001193125-24-140730

S-1/A amended

Amended registration statement

Updated registration statement filed after SEC comments or deal changes.

Updates the prior S-1 filing.

QT Imaging Holdings, Inc. is offering up to 49,264,364 shares of common stock and 889,364 warrants, including public and private placement warrants, sponsor warrants, and shares from a working capital note conversion. The filing also includes shares held by selling securityholders, such as founder shares, private placement shares, and closing shares from a business combination. The company focuses on developing an ultrasound scanner for cancer detection and has entered into a standby equity purchase agreement with Yorkville Advisors.

2024-04-24 · 0001193125-24-110124

S-1 filed

Initial registration statement

Initial public filing submitted to start the SEC review process.

Follows EFFECT in the pre-IPO sequence.

QT Imaging Holdings, Inc. is registering shares for resale following a business combination, including common stock and warrants. The filing details securities issued via public and private warrants, a working capital note conversion, and a standby equity purchase agreement (SEPA) with Yorkville. The company, formerly GigCapital5, Inc., underwent a merger with QT Imaging, Inc., resulting in its current structure and name. The registration includes shares from founders, private placements, and potential future issuances under the SEPA.

2024-04-02 · 0001193125-24-084445

EFFECT effective

SEC effectiveness notice

SEC declared the registration statement effective, allowing the offering to proceed.

Follows 8-A12B and marks the registration effective.

The current filing is a Notice of Effectiveness for Form S-4, indicating the effectiveness of securities registration for GigCapital5, Inc., likely related to a business combination or acquisition. The previous 8-A12B filing focused on registering common stock for listing on Nasdaq. The S-4 form suggests a shift toward a business combination structure, potentially involving new securities issuance or mergers.

2024-02-06 · 9999999995-24-000322

8-A12B effective

Exchange Act registration

Registration filed to list the securities under the Exchange Act ahead of trading.

Follows 424B4 and registers the class of securities for exchange listing.

The current filing represents GigCapital5, Inc.'s registration of its common stock for listing on The Nasdaq Stock Market LLC. This follows the company's transition from a blank check SPAC structure, previously outlined in its 424B4 prospectus, to a standard reporting entity. The filing incorporates previously disclosed securities details and confirms the transfer of listing without introducing new securities or material structural changes.

2023-04-12 · 0001193125-23-099298

424B4 priced

Final prospectus

Final prospectus filed after pricing with final deal terms.

Follows 8-A12B and confirms the priced prospectus.

GigCapital5, Inc. is a newly organized SPAC conducting an IPO to raise $200 million through the sale of 20 million units at $10 each, each containing common stock and redeemable warrants. The company aims to pursue a business combination in TMT, A&D, advanced medical equipment, and sustainable industries. Funds will be held in a trust account, with redemption terms for public shareholders if the business combination isn't completed within 18 months. A private placement of 750,000 units by the sponsor is also planned.

2021-09-27 · 0001193125-21-284317

EFFECT effective

SEC effectiveness notice

SEC declared the registration statement effective, allowing the offering to proceed.

Follows S-1/A and marks the registration effective.

The registration statement for GigCapital5, Inc. (formerly QT Imaging Holdings, Inc.) became effective on September 23, 2021, following an S-1/A amendment. The filing details the offering of 40,250,000 units, each containing one share of common stock and one redeemable warrant, with a total proposed offering price of $230 million. The registration fee was $43,912.75, and the document includes updates to the fee table and structural adjustments to the units, including reduced unit counts and warrant allocations.

2021-09-23 · 9999999995-21-003635

8-A12B effective

Exchange Act registration

Registration filed to list the securities under the Exchange Act ahead of trading.

Follows EFFECT and registers the class of securities for exchange listing.

GigCapital5, Inc. filed Form 8-A to register units, common stock, and redeemable warrants under Section 12(b) of the Securities Exchange Act. The filing incorporates by reference the securities descriptions from its prior S-1 Registration Statement (File No. 333-254038), which was effective on September 23, 2021. The registration includes units consisting of common stock and redeemable warrants, with specific terms outlined in the referenced prospectus.

2021-09-23 · 0001193125-21-280735

S-1/A amended

Amended registration statement

Updated registration statement filed after SEC comments or deal changes.

Updates the prior S-1/A filing.

The current S-1/A filing for GigCapital5, Inc. updates the registration fee table and reflects amendments to the unit structure, including the number of units offered and warrant terms. The company, a SPAC, remains focused on acquiring businesses in TMT, A&D, and sustainable industries, with no specific target selected. Key changes include adjustments to the unit composition and updated fee calculations.

2021-09-21 · 0001193125-21-278451

S-1/A amended

Amended registration statement

Updated registration statement filed after SEC comments or deal changes.

Updates the prior S-1/A filing.

QT Imaging Holdings, Inc. (GigCapital5, Inc.) is a newly organized SPAC aiming to complete a business combination in the TMT, A&D, and sustainable industries. The current S-1/A filing details an IPO of 20,000,000 units at $10.00 per unit, each containing common stock and redeemable warrants. The offering includes a 45-day over-allotment option and outlines trust account terms for shareholder redemptions. The company has not yet identified a target and faces risks related to its extended timeline and reliance on sponsor support.

2021-09-20 · 0001193125-21-276654

S-1/A amended

Amended registration statement

Updated registration statement filed after SEC comments or deal changes.

Updates the prior S-1/A filing.

QT Imaging Holdings, Inc. (GigCapital5, Inc.) is a newly organized SPAC aiming to merge with or acquire a business in the TMT, A&D, and sustainable industries. The current S-1/A details an IPO of 20,000,000 units at $10.00 each, including common stock and redeemable warrants. The filing outlines redemption terms for public shares, sponsor commitments, and underwriter over-allotment options. The company has not yet identified a specific target and operates as a blank check entity.

2021-08-23 · 0001193125-21-254025

S-1/A amended

Amended registration statement

Updated registration statement filed after SEC comments or deal changes.

Updates the prior S-1/A filing.

GigCapital5, Inc. is a SPAC formed to pursue a business combination in technology, media, telecommunications, aerospace, defense, intelligent automation, or sustainable industries. The company is offering 35,000,000 units at $10.00 each, consisting of common stock and redeemable warrants. The offering includes a 45-day over-allotment option for underwriters and private placements by the sponsor and underwriters. Funds will be held in a trust account, with redemption terms tied to the completion of a business combination within 24 months.

2021-04-26 · 0001193125-21-131640

S-1/A amended

Amended registration statement

Updated registration statement filed after SEC comments or deal changes.

Updates the prior S-1 filing.

QT Imaging Holdings, Inc. (GigCapital5, Inc.) is a SPAC formed to merge with a business in technology, media, telecommunications, aerospace, defense, intelligent automation, or sustainable industries. The current S-1/A amends the initial S-1 filing, detailing an IPO of 35 million units at $10.00 per unit, including common stock and redeemable warrants. The offering includes a 45-day over-allotment option, private placements by the sponsor and underwriters, and trust account provisions for redemption rights. The company has not yet identified a target business combination.

2021-03-22 · 0001193125-21-087879

S-1 filed

Initial registration statement

Initial public filing submitted to start the SEC review process.

Follows DRS in the pre-IPO sequence.

GigCapital5, Inc. is conducting an IPO to raise $350 million through the offering of 35 million units, each consisting of one share of common stock and one-third of a redeemable warrant. The company, a blank check SPAC, aims to merge with or acquire a target business in the TMT, A&D, or sustainable industries. The filing details the structure of the offering, including trust account provisions, redemption rights for public shareholders, and private placements by the sponsor and underwriters.

2021-03-09 · 0001193125-21-074922

DRS filed

Draft registration statement

Draft registration filed confidentially before the public launch.

First tracked pre-IPO filing for this issuer.

GigCapital5, Inc. is a newly organized SPAC (Special Purpose Acquisition Company) formed to pursue a business combination in the technology, media, telecommunications, aerospace, defense, intelligent automation, and sustainable industries. The company is offering 35,000,000 units at $10.00 per unit, each consisting of one share of common stock and one-fourth of a redeemable warrant. The offering includes a 45-day over-allotment option for underwriters. Proceeds will be held in a trust account, with redemption rights for public shareholders if the business combination is not completed within 24 months. The company has no operating history and relies on its sponsor and underwriters for execution of its business strategy.

2021-02-23 · 0000950123-21-003079

QT IMAGING HOLDINGS, INC.

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