D. Boral ARC Acquisition I Corp Unit(BCARU) - Prospectus(update)

As filed with the U.S. Securities and Exchange Commission on July 23, 2025. Registration No. 333-286810 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 5 TO FORM S-1 (I.R.S. Employer Identification Number) 10 E. 53rd Street, Suite 3001 New York, NY 10022 Telephone: (332) 266-7344 (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) David Boral Chief Executive Officer 10 E. 53rd Street, Suite 3001 New York, ...