US Merger & Acquisition SEC Filings — April 15, 2026

15-04-2026

Pantages Capital Acquisition Corporation filed an 8-K disclosing Amendment No. 1 to its Business Combination Agreement originally dated November 18, 2025, executed on April 14, 2026. The sole change amends and restates Section 8.1(h) to be intentionally omitted, with all other terms of the agreement remaining in full force and effect. The amendment involves parties including MacMines Austasia Pty Ltd (Company), Horizon Mining Limited (Pubco), and others, signed by key representatives.

• ·Original Business Combination Agreement dated November 18, 2025.
• ·Amendment filed as EX-2.1 under Items 1.01 and 9.01 of 8-K on April 15, 2026.

15-04-2026

Keen Vision Acquisition Corp., a blank check company, entered into a binding letter of intent (LOI) with Medera Inc. and its wholly-owned subsidiary Novoheart Group Limited to pursue a replacement merger agreement, following the termination of a prior merger agreement dated September 3, 2024. The LOI, amended on April 14, 2026, extends the deadline for executing the Replacement Merger Agreement from April 10 to April 30, 2026. No financial terms were disclosed in the filing.

• ·Prior Merger Agreement dated September 3, 2024 terminated concurrently with LOI execution via mutual release.
• ·LOI amendment dated April 14, 2026 extends Replacement Merger Agreement deadline to April 30, 2026.
• ·Securities traded on Nasdaq: KVACU (Units), KVAC (Ordinary Shares), KVACW (Warrants).

15-04-2026

On April 14, 2026, Launchpad Cadenza Acquisition Corp I appointed Sheldon Sussman, age 70, as a new member of the Board of Directors effective immediately, and as chair of the Audit Committee, replacing Jonathan Bier who remains a member. Sussman brings extensive experience in global financial markets, including roles at Napier Park Global Capital, Cohen Circle, and building a $25 billion asset management platform at Rabobank International. No family relationships, material transactions, or compensatory arrangements beyond standard agreements were disclosed.

• ·Appointment effective April 14, 2026; filing date April 15, 2026.
• ·Sussman signed joinder to letter agreement dated December 17, 2025 (waiver of redemption rights, vote in favor of initial business combination).
• ·Sussman signed joinder to registration rights agreement dated December 17, 2025.
• ·Standard director indemnity agreement (form filed as Exhibit 10.6 to S-1 on November 10, 2025).

15-04-2026

Ribbon Acquisition Corp., a blank check company (SPAC), deposited an aggregate of $125,000 into its trust account on April 14, 2026, for the benefit of its public shareholders to fund a one-month extension of the deadline to consummate its initial business combination. This extension follows previously approved Extension Amendment and Trust Amendment allowing monthly deposits into the trust. No initial business combination has been completed or announced.

• ·Securities registered: Class A Ordinary Shares (RIBB), Units (RIBBU), Rights (RIBBR) on Nasdaq Stock Market LLC
• ·Company is an emerging growth company
• ·Principal executive offices: Central Park Tower LaTour Shinjuku, Room 3001, 6-15-1 Nishi Shinjuku, Shinjuku-ku, Tokyo 160-0023, Japan

15-04-2026

Spring Valley Acquisition Corp. III (SVIII) disclosed an updated investor presentation via Form 8-K under Regulation FD, superseding the prior version filed on April 6, 2026, regarding its Business Combination Agreement with General Fusion Inc. and 1573562 B.C. Ltd., originally announced January 23, 2026. The filing emphasizes forward-looking statements on the proposed merger, including General Fusion's magnetized target fusion (MTF) technology and LM26 program, but highlights substantial risks such as failure to complete the deal, regulatory hurdles, business disruptions, and commercialization uncertainties.

• ·Previous disclosures: Business Combination Agreement on January 23, 2026; prior investor presentation on April 6, 2026.
• ·IPO Prospectus dated September 3, 2025, filed September 4, 2025.
• ·Joint Registration Statement on Form F-4 filed, includes preliminary proxy statement.
• ·SVIII securities traded as SVACU (units), SVAC (Class A shares), SVACW (warrants) on Nasdaq.

15-04-2026

SIM Acquisition Corp. I, a blank check company, has postponed its extraordinary general meeting from April 16, 2026, to April 23, 2026, to vote on the Extension Amendment Proposal, which seeks to extend the initial business combination deadline from July 11, 2026, to July 12, 2027. The shareholder redemption deadline has been extended to April 21, 2026, at 5:00 p.m. ET. No financial metrics or performance data are reported in the filing.

• ·Record date for shareholders: March 25, 2026.
• ·Proxy Statement mailed beginning on or about April 1, 2026.
• ·Meeting location: offices of Ellenoff Grossman & Schole LLP, 1345 Avenue of the Americas, 11th Floor, New York, New York 10105.
• ·Company address: 725 Fifth Avenue, 22nd Floor, New York, New York 10022; Phone: (833) 746-2001.

15-04-2026

Constellation Acquisition Corp I (CSTA) and HiTech Minerals Inc. issued a joint press release on April 15, 2026, announcing an update to their investor webinar discussing the proposed business combination with US Elemental Inc. (PubCo) and anticipated Nasdaq listing, rescheduling it to April 22, 2026 at 10AM Eastern Time. Exhibits 99.1 (press release), 99.2 (notice from Alliance Advisors), and 99.3 (LinkedIn post) are furnished under Item 7.01. The filing includes standard forward-looking statement cautions and references to upcoming proxy/registration statement on Form S-4.

• ·Securities traded on OTCID Basic Market: Class A ordinary shares (CSTAF), Redeemable warrants (CSTWF), Units (CSTUF).
• ·Proxy/Registration Statement on Form S-4 to be filed with SEC by PubCo and CSTA.

15-04-2026

On April 7, 2026, Plum III Merger Corp. (PubCo), Sierra Blanca Quarry, LLC (Seller), and Tactical Resources Corp. (Buyer) entered into an Asset Purchase Agreement for Buyer to purchase approximately 1.5 million tons of processed tailings in exchange for 3,000,000 shares of PubCo common stock. Closing is subject to customary conditions, including the previously announced business combination involving Plum Acquisition Corp. III, Tactical, and PubCo. The acquisition secures feedstock for Tactical's Peak Rare Earth Project, reducing mining and permitting timelines.

• ·PubCo will file a registration statement on Form S-3 or F-3 (or S-1/F-1 if ineligible) post-closing for resale of the Stock Consideration by Seller.
• ·Tailings sourced from Sierra Blanca Quarry's two-decade ballast crushing operations in Texas.
• ·Press release issued by Tactical on April 15, 2026.

15-04-2026

WinVest Acquisition Corp., a SPAC, issued an unsecured promissory note on March 16, 2026, with a principal of $180,000 to its Sponsor, WinVest SPAC LLC, to fund extensions of its Business Combination Termination Date through drawdowns of up to six $30,000 installments. On April 10, 2026, the Company completed the second $30,000 drawdown, depositing it into the Trust Account and extending the Termination Date from April 17, 2026, to May 17, 2026. The non-interest-bearing note matures upon Business Combination closing or liquidation, with repayment from outside the Trust Account if no combination occurs.

• ·Promissory Note allows drawdowns in up to six equal amounts of $30,000 each.
• ·Note repayment only from amounts remaining outside the Trust Account if no Business Combination is consummated.