SCHEDULE 13G/A 0001695320 XXXXXXXX LIVE 4 Class A common stock, par value $0.0001 per share 03/31/2025 0001851959 Concord Acquisition Corp II 20607U108 477 MADISON AVENUE NEW YORK NY 10022 Rule 13d-1(b) PERISCOPE CAPITAL INC. b Z4 0.00 0.00 0.00 0.0 FI Concord Acquisition Corp II 477 MADISON AVENUE, NEW YORK, NEW YORK, 10022. This Schedule 13G is being filed on behalf of Periscope Capital Inc. (Periscope) with respect to the shares of Class A common stock, par value $0.0001 per share (the Common Stock), of Concord Acquisition Corp II, a Delaware corporation (the Issuer). Periscope, which is the beneficial owner of 0 shares of Common Stock, acts as investment manager of, and exercises investment discretion with respect to, certain private investment funds (each, a Periscope Fund) that collectively directly own 0 shares of Common Stock. The filing of this statement should not be construed as an admission that Periscope is, for the purpose of Section 13 of the Act, the beneficial owner of the Common Stock owned by the Periscope Funds. 333 Bay Street, Suite 1240, Toronto, Ontario, Canada M5H 2R2 See Row 4 of the Cover Page. N FI Non-U.S. investment adviser. 0 0 0 0 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. PERISCOPE CAPITAL INC. Lisa Shostack 05/12/2025 The original statement shall be signed by each person on whose behalf the statement is filed or his authorized representative. If the statement is signed on behalf of a person by his authorized representative (other than an executive officer or general partner of this filing person), evidence of the representative's authority to sign on behalf of such person shall be filed with the statement, provided, however, that a power of attorney for this purpose which is already on file with the Commission may be incorporated by reference. The name and any title of each person who signs the statement shall be typed or printed beneath his signature. Attention: Intentional misstatements or omissions of fact constitute Federal criminal violations (See 18 U.S.C. 1001).