Prospectus Supplement No. 15
Filed Pursuant to Rule 424(b)(3)
File No. 333-268503
SeaStar Medical Holding Corporation
3513 Brighton Blvd,
Suite 410
Denver, CO 80216
(844) 427-8100
Prospectus Supplement No. 15
(to the Prospectus dated January 4, 2023)
This Prospectus Supplement No. 15 supplements and amends the prospectus dated January 4, 2023, as amended by Prospectus Supplement No. 1 dated February 15, 2023, Prospectus Supplement No. 2 dated February 16, 2023, Prospectus Supplement No. 3 dated March 16, 2023, Prospectus Supplement No. 4 dated March 31, 2023, Prospectus Supplement No. 5 dated March 31, 2023, Prospectus Supplement No. 6 dated May 10, 2023, Prospectus Supplement No. 7 dated May 19, 2023, Prospectus Supplement No. 8 dated May 23, 2023, Prospectus Supplement No. 9 dated June 12, 2023, Prospectus Supplement No. 10 dated June 21, 2023, Prospectus Supplement No. 11 dated July 5, 2023, Prospectus Supplement No. 12 dated August 14, 2023, Prospectus Supplement No. 13 dated August 15, 2023 and Prospectus Supplement No. 14 dated August 15, 2023 (the “Prospectus”), relating to the sale from time to time of up to 9,829,000 shares of our common stock and 6,438,000 of our warrants to purchase common stock by a selling shareholder.
On August 30, 2023, we filed with the U.S. Securities and Exchange Commission the attached Current Report on Form 8-K.
This Prospectus Supplement No. 15 should be read in conjunction with the Prospectus and is qualified by reference to the Prospectus except to the extent that the information in this Prospectus Supplement No. 15 supersedes the information contained in the Prospectus.
Our common stock is traded on the Nasdaq Stock Market under the symbol “ICU”. On September 8, 2023, the last reported sale price of our common stock was $0.19 per share.
Investing in our common stock involves a high degree of risk. See “Risk Factors” beginning on page 6 of the Prospectus dated January 4, 2023.
Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this Prospectus Supplement No. 15 is truthful or complete. Any representation to the contrary is a criminal offense.
The date of this Prospectus Supplement No. 15 is September 11, 2023.