0002019804
Company
Terrestrial Energy Inc. /DE/
Fabricated Plate Work (Boiler Shops) · IMSR
follow-on
trading
priced
Nasdaq
424B3
Filing Timeline
SEC EDGAR
424B3
priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows 424B3 and confirms the priced prospectus.
2026-03-30 · 0001104659-26-036889
424B3
priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows 424B3 and confirms the priced prospectus.
2026-03-30 · 0001104659-26-036893
424B3
priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows 424B3 and confirms the priced prospectus.
2026-01-05 · 0001104659-26-000702
424B3
priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows EFFECT and confirms the priced prospectus.
2025-12-30 · 0001104659-25-125280
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.
2025-12-23 · 9999999995-25-003908
S-1/A
amended
Amended registration statement
Updated registration statement filed after SEC comments or deal changes.
Updates the prior S-1 filing.
2025-12-22 · 0001104659-25-123776
S-1
filed
Initial registration statement
Initial public filing submitted to start the SEC review process.
Follows 425 in the pre-IPO sequence.
2025-11-26 · 0001104659-25-116127
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2025-10-22 · 0001213900-25-101317
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2025-10-02 · 0001213900-25-094894
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows EFFECT in the pre-IPO sequence.
2025-09-29 · 0001213900-25-093218
424B3
priced
Final prospectus
Final prospectus filed near launch with final deal terms.
Follows S-4/A and confirms the priced prospectus.
2025-09-26 · 0001213900-25-092372
EFFECT
effective
SEC effectiveness notice
SEC declared the registration statement effective, allowing the offering to proceed.
Follows 424B3 and marks the registration effective.
2025-09-26 · 9999999995-25-003111
S-4/A
amended
S-4/A
Pre-IPO filing captured from the SEC submission timeline.
Updates the prior S-4/A filing.
2025-09-23 · 0001213900-25-090697
S-4/A
amended
S-4/A
Pre-IPO filing captured from the SEC submission timeline.
Updates the prior 425 filing.
2025-09-16 · 0001213900-25-087999
S-4/A
amended
S-4/A
Pre-IPO filing captured from the SEC submission timeline.
Updates the prior 425 filing.
2025-09-04 · 0001213900-25-084249
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows S-4/A in the pre-IPO sequence.
2025-09-04 · 0001213900-25-084561
S-4/A
amended
S-4/A
Pre-IPO filing captured from the SEC submission timeline.
Updates the prior 425 filing.
2025-08-15 · 0001213900-25-077577
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows S-4/A in the pre-IPO sequence.
2025-08-15 · 0001213900-25-077331
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows S-4 in the pre-IPO sequence.
2025-08-06 · 0001213900-25-072631
S-4
filed
S-4
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2025-07-17 · 0001213900-25-065231
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows DRS in the pre-IPO sequence.
2025-06-24 · 0001213900-25-057249
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
2025-06-24 · 0001213900-25-057251
DRS
filed
Draft registration statement
Draft registration filed confidentially before the public launch.
Begins the tracked draft filing sequence after 425.
Terrestrial Energy Inc. (formerly HCM II Acquisition Corp.) is undergoing a business combination involving a merger with Terrestrial Energy Opco, followed by a domestication from the Cayman Islands to Delaware. The transaction includes share conversions, a PIPE financing round, and renaming to Terrestrial Energy Inc. The filing outlines the structure of the merger, share exchanges, and conditions for closing, including trust account requirements and stock price thresholds.
2025-05-30 · 0001213900-25-049574
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
Terrestrial Energy Inc. is advancing its plans to go public via a SPAC merger with HCM II Acquisition Corp, highlighting its small modular reactor (SMR) technology and the impact of recent executive orders supporting nuclear energy. The company emphasizes its Generation 4 reactor design, which aims to reduce costs and increase efficiency through molten salt technology. The filing outlines the merger process, regulatory engagement, and the strategic importance of nuclear energy in meeting future energy demands, particularly for AI and industrial applications.
2025-05-27 · 0001213900-25-047873
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
Terrestrial Energy Inc. is set to go public via a reverse merger with HCM II Acquisition Corp., a SPAC, with plans to list on Nasdaq in Q4 2025. The company, led by CEO Simon Irish, specializes in molten salt nuclear reactor technology, which offers higher efficiency and lower waste compared to traditional reactors. The deal includes a $50 million private investment in public equity (PIPE) and partnerships with Texas A&M for commercial deployment by the 2030s. Regulatory approvals from the Canadian Nuclear Safety Commission and U.S. Nuclear Regulatory Commission are ongoing.
2025-03-28 · 0001013762-25-003481
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 424B4 in the pre-IPO sequence.
HCM II Acquisition Corp. entered into a Business Combination Agreement to merge with Terrestrial Energy Inc., transitioning from a Cayman Islands exempted company to a Delaware corporation. The merger involves share conversions, redemption opportunities for public shareholders, and a PIPE financing round. The transaction is expected to close in Q4 2025, pending shareholder approvals and regulatory conditions.
2025-03-26 · 0001013762-25-002487
425
supplemental
425
Pre-IPO filing captured from the SEC submission timeline.
Follows 425 in the pre-IPO sequence.
Terrestrial Energy Inc. is going public via a SPAC merger with HCM II Acquisition Corp., valuing the company at $925 million with $280 million in gross proceeds. The deal includes a $50 million PIPE investment and aims to commercialize molten salt nuclear reactors. The combined entity plans to list on Nasdaq, with regulatory approvals pending and expected closure in Q4 2025.
2025-03-26 · 0001013762-25-002826
424B4
priced
Final prospectus
Final prospectus filed after pricing with final deal terms.
Follows EFFECT and confirms the priced prospectus.
Price $10.00 · 20,000,000 shares · Gross proceeds $200,000,000
Class A ordinary shares and redeemable warrants · Exchange Nasdaq · Ticker HONDU · Over-allotment 3,000,000 · Each unit consists of one Class A ordinary share and one-half of one redeemable warrant · Warrants exercisable at $11.50 per share, exercisable 30 days after initial business combination · Use of proceeds Proceeds will be placed in a trust account for initial business combination · Flags cayman_holding_company, units · Underwriters Cantor Fitzgerald & Co.
HCM II Acquisition Corp., a blank check company, is conducting an IPO to raise $200 million through the sale of 20 million units at $10.00 each. Each unit includes a Class A ordinary share and a redeemable warrant. The company has 24 months to complete an initial business combination, with provisions for shareholder redemption of public shares. The offering includes underwriter over-allotment options, private placement warrants, and specific terms for trust account distributions. The filing emphasizes risks related to the lack of a defined business target and time constraints.
2024-08-16 · 0001140361-24-037680
8-A12B
effective
Exchange Act registration
Registration filed to list the securities under the Exchange Act ahead of trading.
Follows S-1/A and registers the class of securities for exchange listing.
Terrestrial Energy Inc. filed a Form 8-A12B to register securities under Section 12(b) of the Exchange Act, referencing its prior S-1/A registration statement. The filing confirms the registration of units, Class A ordinary shares, and redeemable warrants, with details aligning with the earlier S-1/A. No new material details are provided beyond the registration framework.
2024-08-15 · 0001140361-24-037444
CERT
inactive
CERT
Pre-IPO filing captured from the SEC submission timeline.
Follows 8-A12B in the pre-IPO sequence.
The current filing for Terrestrial Energy Inc. (form CERT) appears to be unreadable due to corrupted or non-standard formatting, as the provided text contains binary data and non-ASCII characters. No actionable information about the company's securities, operations, or disclosures could be extracted from the provided text. The previous filing (8-A12B) relates to a different entity, HCM II Acquisition Corp., and is not directly relevant to Terrestrial Energy Inc.
2024-08-15 · 0001354457-24-000570
EFFECT
effective
SEC effectiveness notice
SEC declared the registration statement effective, allowing the offering to proceed.
Follows CERT and marks the registration effective.
Terrestrial Energy Inc. filed a Form S-1 registration statement, which became effective on August 15, 2024. The filing indicates the company is proceeding with its initial public offering (IPO) process, though specific details about the offering terms, securities, or financials are not provided in the extracted text.
2024-08-15 · 9999999995-24-002538
S-1/A
amended
Amended registration statement
Updated registration statement filed after SEC comments or deal changes.
Updates the prior S-1/A filing.
Price $10.00 · 20,000,000 shares · Gross proceeds $200,000,000
Class A ordinary shares · Over-allotment 3,000,000 · Each unit consists of one Class A ordinary share and one-half of one redeemable warrant · Each warrant entitles the holder to purchase one Class A ordinary share at $11.50 per share, exercisable 30 days after the initial business combination · Use of proceeds Proceeds will be used for the initial business combination and working capital · Flags cayman_holding_company, units, warrants · Underwriters Cantor Fitzgerald & Co.
HCM II Acquisition Corp. is a blank check company aiming to merge with or acquire a business, offering 20 million units at $10 each. The IPO includes Class A shares and warrants, with underwriters having a 45-day option to buy more units. The sponsor and underwriters are purchasing private placement warrants, and institutional investors have expressed interest in additional units. The company has not yet selected a target and faces risks related to its speculative nature and reliance on sponsors.
2024-08-02 · 0001140361-24-035550
S-1/A
amended
Amended registration statement
Updated registration statement filed after SEC comments or deal changes.
Updates the prior S-1/A filing.
Price $10.00 · 20,000,000 shares · Gross proceeds $200,000,000
Class A Ordinary Shares · Over-allotment 3,000,000 · Each unit consists of one Class A ordinary share and one-half of one redeemable warrant · Warrants exercisable at $11.50 per share, 30 days post-business combination · Use of proceeds to complete an initial business combination · Flags units · Underwriters Cantor Fitzgerald & Co.
HCM II Acquisition Corp. is a blank check company formed to pursue a merger or business combination. The current filing amends previous disclosures, detailing the public offering of 20,000,000 units at $10.00 each, with underwriters' options and private placement warrants. It outlines redemption terms, trust account mechanics, and potential extensions for completing the initial business combination. The company remains unlisted, with no selected target yet.
2024-07-19 · 0001140361-24-033640
S-1/A
amended
Amended registration statement
Updated registration statement filed after SEC comments or deal changes.
Updates the prior S-1 filing.
23,000,000 shares
ordinary shares · Exchange NASDAQ · Each unit includes one ordinary share and one warrant · Private placement warrants exercisable at $1.00 per share · Use of proceeds General corporate purposes · Flags cayman_holding_company, units, warrants · Underwriters Cantor Fitzgerald & Co.
HCM II Acquisition Corp. filed an S-1/A amendment to its IPO registration statement, primarily to add exhibits. The filing confirms the company's structure as a blank check entity seeking a business combination, with details on its offering, redemption rights, sponsor commitments, and private placement warrants. Key elements include a $200 million public offering of 20 million units, sponsor and underwriter warrant purchases, and governance terms for Class A and B shares.
2024-07-05 · 0001140361-24-032445
S-1
filed
Initial registration statement
Initial public filing submitted to start the SEC review process.
Follows DRS in the pre-IPO sequence.
Price $10.00 · 20,000,000 shares · Gross proceeds $200,000,000
Class A ordinary shares and redeemable warrants · Over-allotment 3,000,000 · One Class A ordinary share and one-half of one redeemable warrant · Each warrant entitles the holder to purchase one Class A ordinary share at $11.50 per share, exercisable 30 days after the completion of the initial business combination · Use of proceeds Proceeds will be used for the initial business combination · Flags cayman_holding_company, units, warrants · Underwriters Cantor Fitzgerald & Co.
HCM II Acquisition Corp. is a blank check company formed to pursue a business combination, with an IPO of 20 million units at $10 each. The offering includes Class A shares and warrants, with proceeds held in a trust account. The company has not selected a target and faces risks related to its speculative nature, redemption terms, and reliance on underwriters.
2024-06-18 · 0001140361-24-030416
DRS
filed
Draft registration statement
Draft registration filed confidentially before the public launch.
First tracked pre-IPO filing for this issuer.
HCM II Acquisition Corp., a Cayman Islands exempted company, is a blank check firm aiming to merge with or acquire a business. The IPO offers 20,000,000 units at $10.00 each, comprising Class A shares and redeemable warrants. Proceeds will be held in a trust, with underwriters having a 45-day option to purchase additional units. The company has 24 months to complete a business combination, with potential extensions requiring shareholder approval. No public market exists for its securities, and it is an emerging growth company.
2024-04-26 · 0001140361-24-022515
Comparable Deals
Not enough completed IPOs with similar characteristics to show comparables yet.
Recent News
No recent news stored for this issuer.