ACP Holdings Acquisition Corp.

Q: Jun 30 2026

Q: Mar 31 2026

Entry into a Material Definitive Agreement

Other Events

Other Events

Entry into a Material Definitive Agreement

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Prospectus Supplement with Pricing Information

Notice of Effectiveness

Certification of approval for listing and registration on a national securities exchange

Registration of Securities on Exchange

Amended Initial Registration Statement

Amended Initial Registration Statement

Registration (IPO) statement under Securities Act of 1933

Polar Asset Management Partners Inc.

Magnetar Financial LLC

Adage Capital Management, L.P.

Roth August

Sung Andrew

Urfrig Jonathan David

Wallace Sean R.

Mallozzi Andrew Emilio; Union Street Sponsor, LLC

Mallozzi Andrew Emilio

Union Street Sponsor, LLC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC