Pasithea Therapeutics Corp Schedule 13G/A discloses ownership by Ameriprise Financial, Inc. and Columbia Management Investment Advisers, LLC. The filing reports 1,350,896 shares held with 5.4% of the class (CUSIP 70261F202). Ameriprise states CMIA’s holdings are included in AFI’s total and both entities disclaim beneficial ownership. The filing is signed by Michael G. Clarke and attaches exhibits identifying the acquiring subsidiary and a joint filing agreement.
Positive
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Negative
None.
Insights
Large passive holding reported: 1,350,896 shares (5.4%).
The Schedule 13G/A lists Ameriprise Financial, Inc. and Columbia Management Investment Advisers, LLC as reporting persons for Pasithea Therapeutics Corp, showing shared voting and dispositive power over 1,350,896 shares. The filing follows passive-investor reporting conventions and includes a parent/affiliate attribution.
Key dependencies are the attribution language and exhibits identifying the subsidiary. Subsequent filings would show any changes; the current filing documents a static ownership snapshot as reported.
Key Figures
Shares reported:1,350,896 sharesPercent of class:5.4%CUSIP:70261F202+1 more
4 metrics
Shares reported1,350,896 sharesshared voting and dispositive power reported on cover page
Percent of class5.4%Percent of class as shown on cover page
CUSIP70261F202Pasithea Therapeutics Corp common stock identifier
Filing signatoryMichael G. ClarkeSigned as Senior Vice President on 05/15/2026
"Schedule 13G/A appears as the form type on the cover"
A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.
Shared Dispositive Powerfinancial
"Shared Dispositive Power 1,350,896.00 on the cover page"
Beneficial Ownershipregulatory
"Each of AFI and CMIA disclaims beneficial ownership of any shares reported"
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.
Joint Filing Agreementlegal
"Exhibit II Joint Filing Agreement listed in exhibit index"
FAQ
What stake does Ameriprise (KTTA) report in Pasithea Therapeutics?
Ameriprise reports 1,350,896 shares, representing 5.4% of the class (CUSIP 70261F202). The amount is shown as shared voting and dispositive power held via CMIA.
Why are both Ameriprise Financial and CMIA listed on the Schedule 13G/A?
Ameriprise is the parent and CMIA is the investment adviser managing the position. The filing states AFI includes CMIA’s reported shares in AFI’s total while disavowing direct beneficial ownership itself.
Does the filing indicate active trading or a passive position?
The filing is a Schedule 13G/A, which typically reports a passive investment position. The document does not state active trading; it reports shared voting and dispositive powers for the listed shares.
Who signed the Schedule 13G/A for Ameriprise and CMIA?
The filing is signed by Michael G. Clarke, Senior Vice President, North America Head of Operations & Investor Services, with a signature date of 05/15/2026.
Are there exhibits attached to the filing and what do they show?
Yes. The filing lists Exhibit I identifying the subsidiary that acquired the security and Exhibit II as the joint filing agreement among the reporting persons, per the cover page references.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 1)
Pasithea Therapeutics Corp
(Name of Issuer)
Common Stock
(Title of Class of Securities)
70261F202
(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):
70261F202
1
Names of Reporting Persons
Ameriprise Financial, Inc.
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
1,350,896.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,350,896.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,350,896.00
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)
5.4 %
12
Type of Reporting Person (See Instructions)
HC
SCHEDULE 13G
CUSIP Number(s):
70261F202
1
Names of Reporting Persons
Columbia Management Investment Advisers, 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
MINNESOTA
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,350,896.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,350,896.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,350,896.00
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)
5.4 %
12
Type of Reporting Person (See Instructions)
IA
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Pasithea Therapeutics Corp
(b)
Address of issuer's principal executive offices:
1111 Lincoln Road, Suite 500, Miami Beach, FL 33139
Item 2.
(a)
Name of person filing:
(a) Ameriprise Financial, Inc. ("AFI")
(b) Columbia Management Investment Advisers, LLC ("CMIA")
(b)
Address or principal business office or, if none, residence:
(a) 145 Ameriprise Financial Center, Minneapolis, MN 55474
(b) 290 Congress Street, Boston, MA 02210
(c)
Citizenship:
(a) Delaware
(b) Minnesota
(d)
Title of class of securities:
Common Stock
(e)
CUSIP No.:
70261F202
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:
Incorporated by reference to Items (5)-(9) and (11) of the cover page pertaining to each reporting person.
AFI, as the parent company of CMIA, may be deemed to beneficially own the shares reported herein by CMIA. Accordingly, the shares reported herein by AFI include those shares separately reported herein by CMIA.
Each of AFI and CMIA disclaims beneficial ownership of any shares reported on this Schedule.
(b)
Percent of class:
The information required by Item 4(b) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
(ii) Shared power to vote or to direct the vote:
The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
(iii) Sole power to dispose or to direct the disposition of:
The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
(iv) Shared power to dispose or to direct the disposition of:
The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
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.
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
AFI: See Exhibit I
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 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.
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.
Ameriprise Financial, Inc.
Signature:
/s/ Michael G. Clarke
Name/Title:
Michael G. Clarke, Senior Vice President, North America Head of Operations & Investor Services
Date:
05/15/2026
Columbia Management Investment Advisers, LLC
Signature:
/s/ Michael G. Clarke
Name/Title:
Michael G. Clarke, Senior Vice President, North America Head of Operations & Investor Services
Date:
05/15/2026
Comments accompanying signature:
Contact Information
Charles Chiesa
VP Fund Treasurer Global Operations and Investor Services
Telephone: 617-385-9593
Exhibit Information
Exhibit Index
Exhibit I Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company.
Exhibit II Joint Filing Agreement
