Ameriprise Financial, Inc., through its subsidiary Columbia Management Investment Advisers and affiliated funds, reports beneficial ownership of Apnimed, Inc. common stock on a Schedule 13G. Ameriprise Financial and Columbia Management Investment Advisers each report 7,476,992 shares with shared voting and dispositive power, representing 18.9% of Apnimed's common stock. Columbia Seligman Technology and Information Fund separately reports 7,198,843 shares, with sole voting power and shared dispositive power, representing 18.2% of the class as of July 31, 2026.
The filing explains that Columbia Management Investment Advisers may be deemed to beneficially own shares held by the Fund and other managed accounts, and Ameriprise Financial may be deemed to beneficially own shares reported by Columbia Management Investment Advisers. Each of Ameriprise Financial and Columbia Management Investment Advisers, and identified subsidiaries, disclaims beneficial ownership of the shares reported.
Positive
None.
Negative
None.
Key Figures
Shares beneficially owned by AFI and CMIA:7,476,992 sharesPercent of Apnimed class (AFI and CMIA):18.9%Shares held by Columbia Seligman Technology and Information Fund:7,198,843 shares+2 more
5 metrics
Shares beneficially owned by AFI and CMIA7,476,992 sharesApnimed common stock with shared voting and dispositive power
Percent of Apnimed class (AFI and CMIA)18.9%Beneficial ownership of Apnimed common stock
Shares held by Columbia Seligman Technology and Information Fund7,198,843 sharesApnimed common stock with sole voting and shared dispositive power
Percent of Apnimed class (Fund)18.2%Beneficial ownership by Columbia Seligman Technology and Information Fund
Ownership reference dateJuly 31, 2026Date as of which Apnimed ownership percentages are stated
"Each of AFI and CMIA...disclaims beneficial ownership of any shares reported on this Schedule."
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.
beneficial ownershipfinancial
"CMIA may be deemed to beneficially own the shares reported herein by the Fund."
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.
shared voting powerfinancial
"Shared Voting Power 7,476,992.00"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
shared dispositive powerfinancial
"Shared Dispositive Power 7,476,992.00"
parent holding companyfinancial
"As the parent holding company of CMIA, AFI may be deemed to beneficially own"
How much of Apnimed does Ameriprise Financial (AMP) report owning?
Ameriprise Financial and Columbia Management Investment Advisers report 7,476,992 Apnimed shares with shared voting and dispositive power, representing 18.9% of Apnimed's common stock as of July 31, 2026, on a Schedule 13G filing.
What stake in Apnimed does Columbia Seligman Technology and Information Fund report for AMP?
Columbia Seligman Technology and Information Fund reports 7,198,843 Apnimed shares, with sole voting power and shared dispositive power. This position represents 18.2% of Apnimed's common stock outstanding as of July 31, 2026, according to the Schedule 13G.
Who are the reporting persons in Ameriprise Financial (AMP)'s Schedule 13G on Apnimed?
The reporting persons are Ameriprise Financial, Inc., Columbia Management Investment Advisers, LLC, and Columbia Seligman Technology and Information Fund. Each reports beneficial ownership of Apnimed common stock with specified voting and dispositive powers.
Does Ameriprise Financial (AMP) claim direct ownership of Apnimed shares?
Ameriprise Financial and Columbia Management Investment Advisers state they do not directly own Apnimed common shares. They may be deemed to beneficially own shares held by the Fund and other managed accounts, but they disclaim beneficial ownership of the reported shares.
As of what date are Ameriprise Financial (AMP)'s Apnimed ownership figures reported?
The ownership figures are reported as of July 31, 2026. At that date, Ameriprise Financial and Columbia Management Investment Advisers reported 18.9% beneficial ownership and Columbia Seligman Technology and Information Fund reported 18.2% of Apnimed common stock.
Do other Ameriprise (AMP) managed funds hold more than 5% of Apnimed?
The filing states that, as of July 31, 2026, only the Columbia Seligman Technology and Information Fund owned more than 5% of Apnimed’s common stock. Other Columbia-managed funds or accounts are below the 5% threshold individually.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Apnimed, Inc.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
03770Y107
(CUSIP Number)
07/31/2026
(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):
03770Y107
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
7,476,992.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
7,476,992.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,476,992.00
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)
18.9 %
12
Type of Reporting Person (See Instructions)
HC
SCHEDULE 13G
CUSIP Number(s):
03770Y107
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
7,476,992.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
7,476,992.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,476,992.00
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)
18.9 %
12
Type of Reporting Person (See Instructions)
IA
SCHEDULE 13G
CUSIP Number(s):
03770Y107
1
Names of Reporting Persons
Columbia Seligman Technology and Information Fund
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
MASSACHUSETTS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
7,198,843.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
7,198,843.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,198,843.00
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)
18.2 %
12
Type of Reporting Person (See Instructions)
IV
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Apnimed, Inc.
(b)
Address of issuer's principal executive offices:
39 John F. Kennedy Street, 4th Floor, Cambridge, MA 02138
Item 2.
(a)
Name of person filing:
(a) Ameriprise Financial, Inc. ("AFI")
(b) Columbia Management Investment Advisers, LLC ("CMIA")
(c) Columbia Seligman Technology and Information Fund ("Fund")
(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) 290 Congress Street, Boston, MA 02210
(c)
Citizenship:
(a) Delaware
(b) Minnesota
(c) Massachusetts
(d)
Title of class of securities:
Common Stock
(e)
CUSIP Number(s):
03770Y107
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.
CMIA and AFI do not directly own any shares of Common Stock of the issuer. As the investment adviser to the Fund and various other unregistered and registered investment companies and other managed accounts, CMIA may be deemed to beneficially own the shares reported herein by the Fund. Accordingly, the shares reported herein by CMIA include those shares separately reported herein by the Fund.
As the parent holding company of CMIA, AFI 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, and the subsidiaries identified on the attached Exhibit I, 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.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
To the knowledge of AFI, CMIA and the Fund, no other persons besides AFI, CMIA and the Fund and those persons for whose shares of common stock CMIA and AFI report beneficial ownership have the right to receive or the power to direct the receipt of dividends from or the proceeds from the sale of the securities of the issuer reported herein. As of July 31, 2026, only the Fund owned more than 5% of the class of securities reported herein.
Any remaining shares reported herein by CMIA are held by various other funds or accounts managed by CMIA which each have the right to receive any dividends paid by the issuer and could terminate their respective investment advisory relationship with CMIA and then subsequently direct the use of proceeds from the sale of the common stock owned by such fund or account. To CMIA's knowledge, none of these other funds or accounts own more than 5% of the outstanding shares of the issuer as of July 31, 2026.
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:
08/07/2026
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:
08/07/2026
Columbia Seligman Technology and Information Fund
Signature:
/s/ Michael G. Clarke
Name/Title:
Michael G. Clarke, Senior Vice President & Chief Financial Officer
Date:
08/07/2026
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
