SeaStar Medical Holding Corporation reports that, as of March 31, 2026, the reporting parties may be deemed to beneficially own 443,253 shares of Common Stock, representing 9.99% of the class based on 3,993,719 shares outstanding as of March 24, 2026. The reported position consists of four warrants held by Intracoastal exercisable for 134,615, 134,615, 131,062 and 42,961 shares, and excludes additional warrants subject to blocker provisions. Without the blocker provisions, the reporting persons may have been deemed to beneficially own 534,285 shares.
Positive
None.
Negative
None.
Insights
Schedule 13G/A discloses a near-10% beneficial stake held through exercisable warrants.
The filing lists a combined beneficial position of 443,253 shares tied to four Intracoastal warrants and reports 3,993,719 shares outstanding as of March 24, 2026. The report emphasizes voting and dispositive power is shared among the reporting persons.
The filing also identifies blocker provisions that limit exercise above specified ownership caps; without those blockers the stake would be 534,285 shares. Subsequent disclosures may clarify whether exercises, voting coordination, or group membership change this position.
Key Figures
Beneficial ownership reported:443,253 sharesPercent of class:9.99%Shares outstanding used:3,993,719 shares+3 more
6 metrics
Beneficial ownership reported443,253 sharesas of <date>March 31, 2026</date>
Percent of class9.99%based on 3,993,719 shares outstanding as of <date>March 24, 2026</date>
Shares outstanding used3,993,719 sharesas reported by the issuer as of <date>March 24, 2026</date>
Potential ownership without blockers534,285 shareshypothetical aggregate if blocker provisions did not apply
Intracoastal Warrant 1134,615 sharesshares issuable upon exercise of Intracoastal Warrant 1
Intracoastal Warrant 442,961 sharesshares issuable upon exercise of Intracoastal Warrant 4 (partial exclusion noted)
Key Terms
blocker provision, beneficial ownership, warrant
3 terms
blocker provisionregulatory
"Intracoastal Warrant 4 contains a blocker provision under which the holder...would result in beneficial ownership above 9.99%"
beneficial ownershipregulatory
"each of the Reporting Persons may have been deemed to have beneficial ownership of 443,253 shares"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
warrantfinancial
"134,615 shares of Common Stock issuable upon exercise of a warrant held by Intracoastal"
A warrant is a time-limited financial contract that gives its holder the right to buy a company's shares at a set price before a specified date, like a coupon that lets you purchase stock at a fixed discount for a limited time. It matters to investors because warrants offer leveraged exposure to a stock’s upside and can dilute existing shareholders if exercised, so they affect potential gains and the company’s outstanding share count.
How many SeaStar Medical (ICU) shares do the reporting persons beneficially own?
They report beneficial ownership of 443,253 shares, which the filing states represents 9.99% of the Common Stock based on 3,993,719 shares outstanding as of March 24, 2026. The position is derived from exercisable warrants held by Intracoastal.
What securities form the reported position in the Schedule 13G/A for ICU?
The position consists of four Intracoastal warrants exercisable into 134,615, 134,615, 131,062, and 42,961 shares of Common Stock. The filing itemizes each warrant and the resulting share counts supporting the 9.99% figure.
Do any restrictions limit exercise of the Intracoastal warrants?
Yes. The filing states certain warrants contain blocker provisions preventing exercise to the extent it would cause beneficial ownership above 9.99% or 4.99%, and those restricted shares are excluded from the reported 443,253 total.
What would the ownership be without the blocker provisions?
The filing says that without the blocker provisions the reporting persons may have been deemed to beneficially own 534,285 shares. That alternative total aggregates additional shares currently excluded under the blocker terms.
Who are the reporting persons named in the filing for ICU?
The filing is made on behalf of Mitchell P. Kopin, Daniel B. Asher, and Intracoastal Capital LLC. Addresses and citizenship are provided for each reporting person in the Schedule 13G/A.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 3)
SeaStar Medical Holding Corporation
(Name of Issuer)
Common stock, par value $0.0001 per share
(Title of Class of Securities)
81256L302
(CUSIP Number)
03/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
81256L302
1
Names of Reporting Persons
Mitchell P. Kopin
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
443,253.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
443,253.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
443,253.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
9.99 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
CUSIP Number(s):
81256L302
1
Names of Reporting Persons
Daniel B. Asher
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
443,253.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
443,253.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
443,253.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
9.99 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
CUSIP Number(s):
81256L302
1
Names of Reporting Persons
Intracoastal Capital LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
443,253.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
443,253.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
443,253.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
9.99 %
12
Type of Reporting Person (See Instructions)
OO
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
SeaStar Medical Holding Corporation
(b)
Address of issuer's principal executive offices:
3513 Brighton Blvd, Suite 410, Denver, Colorado 80216
Item 2.
(a)
Name of person filing:
This Schedule 13G is being filed on behalf of (i) Mitchell P. Kopin, an individual ("Mr. Kopin"), (ii) Daniel B. Asher, an individual ("Mr. Asher") and (iii) Intracoastal Capital LLC, a Delaware limited liability company ("Intracoastal" and together with Mr. Kopin and Mr. Asher, collectively the "Reporting Persons").
(b)
Address or principal business office or, if none, residence:
The principal business office of Mr. Kopin and Intracoastal is 245 Palm Trail, Delray Beach, Florida 33483. The principal business office of Mr. Asher is 1011 Lake Street, Suite 311, Oak Park, Illinois 60301.
(c)
Citizenship:
Mr. Kopin is a citizen of the United States of America. Mr. Asher is a citizen of the United States of America. Intracoastal is a Delaware limited liability company.
(d)
Title of class of securities:
Common stock, par value $0.0001 per share
(e)
CUSIP No.:
81256L302
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
As of the close of business on March 31, 2026, each of the Reporting Persons may have been deemed to have beneficial ownership of 443,253 shares of Common Stock, which consisted of (i) 134,615 shares of Common Stock issuable upon exercise of a warrant held by Intracoastal ("Intracoastal Warrant 1"), (ii) 134,615 shares of Common Stock issuable upon exercise of a second warrant held by Intracoastal ("Intracoastal Warrant 2"), (iii) 131,062 shares of Common Stock issuable upon exercise of a third warrant held by Intracoastal ("Intracoastal Warrant 3") and (iv) 42,961 shares of Common Stock issuable upon exercise of a fourth warrant held by Intracoastal ("Intracoastal Warrant 4"), and all such shares of Common Stock represent beneficial ownership of approximately 9.99% of the Common Stock, based on (1) 3,993,719 shares of Common Stock outstanding as of March 24, 2026, as reported by the Issuer, plus (2) 134,615 shares of Common Stock issuable upon exercise of Intracoastal Warrant 1, (3) 134,615 shares of Common Stock issuable upon exercise of Intracoastal Warrant 2, (4) 131,062 shares of Common Stock issuable upon exercise of Intracoastal Warrant 3 and (5) 42,961 shares of Common Stock issuable upon exercise of Intracoastal Warrant 4. The foregoing excludes (I) 81,053 shares of Common Stock issuable upon exercise of Intracoastal Warrant 4 because Intracoastal Warrant 4 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 4 to the extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the holder's affiliates, and any other persons acting as a group together with the holder or any of the holder's affiliates, of more than 9.99% of the Common Stock, (II) 500 shares of Common Stock issuable upon exercise of a fifth warrant held by Intracoastal ("Intracoastal Warrant 5") because Intracoastal Warrant 5 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 5 to the extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the holder's affiliates, and any other persons acting as a group together with the holder or any of the holder's affiliates, of more than 4.99% of the Common Stock and (III) 9,479 shares of Common Stock issuable upon exercise of a sixth warrant held by Intracoastal ("Intracoastal Warrant 6") because Intracoastal Warrant 6 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 6 to the extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the holder's affiliates, and any other persons acting as a group together with the holder or any of the holder's affiliates, of more than 4.99% of the Common Stock. Without such blocker provisions, each of the Reporting Persons may have been deemed to have beneficial ownership of 534,285 shares of Common Stock.
(b)
Percent of class:
9.99 %
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
0
(ii) Shared power to vote or to direct the vote:
443,253
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
443,253
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
Not Applicable
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 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.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
