SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Plum Acquisition Corp. IV

(Name of Issuer)

Class A Ordinary Shares, par value $0.0001 per share

(Title of Class of Securities)

G7134A104

(CUSIP Number)

07/16/2026

(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)

SCHEDULE 13G

CUSIP Number(s):

G7134A104

Names of Reporting Persons

Linden Capital L.P.

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

Sec Use Only

Citizenship or Place of Organization

BERMUDA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 700,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 700,000.00

Aggregate Amount Beneficially Owned by Each Reporting Person

700,000.00

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in row (9)

6.5 %

Type of Reporting Person (See Instructions)

SCHEDULE 13G

CUSIP Number(s):

G7134A104

Names of Reporting Persons

Linden GP LLC

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

Sec Use Only

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 700,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 700,000.00

Aggregate Amount Beneficially Owned by Each Reporting Person

700,000.00

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in row (9)

6.5 %

Type of Reporting Person (See Instructions)

SCHEDULE 13G

CUSIP Number(s):

G7134A104

Names of Reporting Persons

Linden Advisors LP

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

Sec Use Only

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 700,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 700,000.00

Aggregate Amount Beneficially Owned by Each Reporting Person

700,000.00

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in row (9)

6.5 %

Type of Reporting Person (See Instructions)

IA, PN

SCHEDULE 13G

CUSIP Number(s):

G7134A104

Names of Reporting Persons

Siu Min Wong

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

Sec Use Only

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 700,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 700,000.00

Aggregate Amount Beneficially Owned by Each Reporting Person

700,000.00

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in row (9)

6.5 %

Type of Reporting Person (See Instructions)

IN, HC

SCHEDULE 13G

Item 1.

(a)

Name of issuer:

Plum Acquisition Corp. IV

(b)

Address of issuer's principal executive offices:

2021 Fillmore St. #2089, San Francisco, California 94115

Item 2.

(a)

Name of person filing:

This Statement is filed on behalf of each of the following persons (collectively, the "Reporting Persons") i) Linden Capital L.P., a Bermuda limited partnership ("Linden Capital"); ii) Linden GP LLC, a Delaware limited liability company ("Linden GP"); iii) Linden Advisors LP, a Delaware limited partnership ("Linden Advisors"); and iv) Siu Min (Joe) Wong ("Mr. Wong"). This Statement relates to Class A Ordinary Shares, par value $0.0001 per share (the "Shares") of Plum Acquisition Corp. IV (the "Issuer") held for the account of Linden Capital. Linden GP is the general partner of Linden Capital and, in such capacity, may be deemed to beneficially own the Shares held by Linden Capital. Linden Advisors is the investment manager of Linden Capital. Mr. Wong is the principal owner and controlling person of Linden Advisors and Linden GP. In such capacities, Linden Advisors and Mr. Wong may each be deemed to beneficially own the Shares held by Linden Capital.

(b)

Address or principal business office or, if none, residence:

The principal business address for Linden Capital is Victoria Place, 31 Victoria Street, Hamilton HM10, Bermuda. The principal business address for each of Linden Advisors, Linden GP and Mr. Wong is 590 Madison Avenue, 32nd Floor, New York, New York 10022.

(c)

Citizenship:

i) Linden Capital is a Bermuda limited partnership. ii) Linden GP is a Delaware limited liability company. iii) Linden Advisors is a Delaware limited partnership. iv) Mr. Wong is a citizen of China (Hong Kong) and the United States.

(d)

Title of class of securities:

Class A Ordinary Shares, par value $0.0001 per share

(e)

CUSIP Number(s):

G7134A104

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 July 16, 2026, each of Linden Advisors, Mr. Wong, Linden GP and Linden Capital may be deemed the beneficial owner of 700,000 Shares. This amount consists of 700,000 Shares held by Linden Capital.

(b)

Percent of class:

As of July 16, 2026, each of Linden Advisors, Mr. Wong, Linden GP and Linden Capital may be deemed the beneficial owner of approximately 6.5% of Shares outstanding.

(c)

Number of shares as to which the person has:

(i) Sole power to vote or to direct the vote:

Linden Capital and Linden GP: 0 Linden Advisors and Mr. Wong: 0

(ii) Shared power to vote or to direct the vote:

Linden Capital and Linden GP: 700,000 Linden Advisors and Mr. Wong: 700,000

(iii) Sole power to dispose or to direct the disposition of:

Linden Capital and Linden GP: 0 Linden Advisors and Mr. Wong: 0

(iv) Shared power to dispose or to direct the disposition of:

Linden Capital and Linden GP: 700,000 Linden Advisors and Mr. Wong: 700,000

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.

See disclosure in Items 2 and 4 hereof.

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.

See disclosure in Item 2 hereof.

Item 8.

Identification and Classification of Members of the Group.

If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group.

See Exhibit A attached hereto.

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.

Linden Capital L.P.

Signature:	/S/ Saul Ahn
Name/Title:	Saul Ahn, Authorized Signatory
Date:	07/16/2026

Linden GP LLC

Signature:	/S/ Saul Ahn
Name/Title:	Saul Ahn, Authorized Signatory
Date:	07/16/2026

Linden Advisors LP

Signature:	/S/ Saul Ahn
Name/Title:	Saul Ahn, General Counsel
Date:	07/16/2026

Siu Min Wong

Signature:	/S/ Saul Ahn
Name/Title:	Saul Ahn, Attorney-in-Fact for Siu Min Wong**
Date:	07/16/2026

Comments accompanying signature: **Duly authorized under Siu Min Wong's Power of Attorney, dated June 10, 2019, incorporated herein by reference to Exhibit B of the statement on Schedule 13G filed by Linden Capital L.P. on June 19, 2019 in respect of its holdings in Haymaker Acquisition Corp II.