UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-41224 Atlantic Coastal Acquisition Corp. II (Exact name of registrant as specified in its charter) Delaware 85-1013956 (State or other jurisdictio ...

Table of Contents Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Units, each consisting of one share of Series A common stock, $0.0001 par value, and one-half of one redeemable warrant ACABU The Nasdaq Stock Market LLC Shares of Series A common stock included as part of the units ACAB The Nasdaq Stock Market LLC Warrants included as part of the units, each whole warrant exercisable for one share of Series A common sto ...

Table of Contents Title of each classTrading Symbol(s)Name of each exchange on which registered Units, each consisting of one share of Series A common stock, $0.0001 par value, and one-half of one redeemable warrant ACABU The Nasdaq Stock Market LLC Shares of Series A common stock included as part of the units ACAB The Nasdaq Stock Market LLC Warrants included as part of the units, each whole warrant exercisable for one share of Series A common stock at an exercise price of $11.50 ACABW The Nasdaq Stock Mar ...

Table of Contents Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Units, each consisting of one share of Series A common stock, $0.0001 par value, and one-half of one redeemable warrant ACABU The Nasdaq Stock Market LLC Shares of Series A common stock included as part of the units ACAB The Nasdaq Stock Market LLC Warrants included as part of the units, each whole warrant exercisable for one share of Series A common sto ...

Table of Contents Title of Each ClassTrading Symbol(s)Name of Each Exchange on Which Registered Units, each consisting of one share of Series A common stock, $0.0001 par value, and one-half of one redeemable warrant ACABU The Nasdaq Stock Market LLC Shares of Series A common stock included as part of the units ACAB The Nasdaq Stock Market LLC Warrants included as part of the units, each whole warrant exercisable for one share of Series A common stock at an exercise price of $11.50 ACABW The Nasdaq Stock Mar ...