UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 Certification and Notice of Termination of Registration under Section 12(g) of the Securities Exchange Act of 1934 or Suspension of Duty to File Reports Under Sections 13 and 15(d) of the Securities Exchange Act of 1934. Commission File Number: 000-10849 ALLEGIANT BANCORP, INC. --------------------------------------------------------- (Exact name of registrant as specified in its charter) 10401 Clayton Road St. Louis, Missouri 63131 (314) 692-8800 ------------------------------------------- (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) Common Stock, $.01 par value ---------------------------------------------------------- (Title of each class of securities covered by this Form) None ------------------------------------------- (Titles of all other classes of securities for which a duty to file reports under section 13(a) or 15(d) remains) Please place an X in the box(es) to designate the appropriate rule provisions(s) relied upon to terminate or suspend the duty to file reports: Rule 12g-4(a)(1)(i) [x] Rule 12h-3(b)(1)(ii) [ ] Rule 12g-4(a)(1)(ii) [ ] Rule 12h-3(b)(2)(i) [ ] Rule 12g-4(a)(2)(i) [ ] Rule 12h-3(b)(2)(ii) [ ] Rule 12g-4(a)(2)(ii) [ ] Rule 15d-6 [ ] Rule 12h-3(b)(1)(i) [X] Approximate number of holders of record as of the certification or notice date: None National City Corporation is filing this Form 15 on behalf of Allegiant Bancorp, Inc. as successor by merger. Pursuant to the requirements of the Securities Exchange Act of 1934, National City Corporation has caused this certification/notice to be signed on its behalf by the undersigned duly authorized person. Date: April 9, 2004 By: /s/ David L. Zoeller ------------------------------ David L. Zoeller Executive Vice President and General Counsel