Plum Acquisition Corp, IV

DEF 14A 1 ea0294598-def14a_plum4.htm DEFINITIVE PROXY STATEMENT

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

Plum Acquisition Corp. IV

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

LETTER TO SHAREHOLDERS OF PLUM ACQUISITION CORP. IV

2021 Fillmore St. #2089

San Francisco, California 94115

Dear Plum Acquisition Corp. IV Shareholder:

You are cordially invited to attend the extraordinary general meeting of Plum Acquisition Corp. IV, a Cayman Islands exempted company (“Plum”), which will be held on July 2, 2026 at 9:00 a.m., Eastern Time, at the offices of Greenberg Traurig, P.A., located at 777 S. Flagler Drive, Suite 300 East, West Palm Beach, FL 33401, or at such other time, on such other date and at such other place to which the meeting may be adjourned (the “Shareholder Meeting”).

The Shareholder Meeting will be conducted at the location specified above for the purposes of our amended and restated memorandum and articles of association (as amended, the “Memorandum and Articles of Association”). If you wish to attend the Shareholder Meeting in person, you must reserve your attendance at least two business days in advance of the Shareholder Meeting by contacting Plum’s Chief Financial Officer at steven@plumpartners.com by 9:00 a.m., Eastern Time, on June 30, 2026.

The attached notice of the Shareholder Meeting and proxy statement describe the business Plum will conduct at the Shareholder Meeting and provide information about Plum that you should consider when you vote your shares. As more fully described in the attached proxy statement, which is dated June 15, 2026 and is first being mailed to shareholders on or about that date, the Shareholder Meeting will be held for the purpose of considering and voting on the following proposals:

Each of the Extension Amendment Proposal and the Adjournment Proposal is more fully described in the accompanying proxy statement. Please take the time to read carefully each of the proposals in the accompanying proxy statement before you vote.

If the Extension Amendment Proposal is approved and the Articles Extension becomes effective, in the event that Plum has not consummated a business combination by January 16, 2027, without approval of Plum’s shareholders, Plum may, by resolution of the Board, if requested by the Sponsor, and upon five days’ advance notice prior to the applicable Termination Date, extend the Termination Date up to six times, each by one additional month (for a total of up to six additional months to complete a business combination).

The purpose of the Extension Amendment Proposal is to allow Plum additional time to complete the proposed transactions contemplated by that certain Business Combination Agreement, dated as of March 8, 2026 (as it has been and may be amended, supplemented or otherwise modified from time to time in accordance with its terms, the “Business Combination Agreement”), by and among Plum, Plum IV Merger Sub, Inc., a Delaware corporation and our direct wholly owned subsidiary (“Merger Sub”), and Controlled Thermal Resources Holdings Inc., a Delaware corporation (“CTR”), pursuant to which, among other things and subject to the terms and conditions contained therein, Merger Sub will merge with and into CTR (the “Merger”), with CTR continuing as the surviving company (collectively with the other transactions described in the Business Combination Agreement, the “Business Combination”). For more information about the Business Combination Agreement and the Business Combination, see our Current Report on Form 8-K filed with the U.S. Securities and Exchange Commission (the “SEC”) on March 12, 2026.You are not being asked to vote on a Business Combination at this time.

While Plum and the other parties to the Business Combination Agreement are working towards satisfaction of the conditions to completion of the Proposed Business Combination (the “Closing”), including that Plum and CTR will file a registration statement on Form S-4 (which will include the Plum preliminary proxy statement/prospectus therein), there will not be sufficient time before July 16, 2026 to complete the transactions contemplated by the Business Combination Agreement (the “Proposed Business Combination”). Accordingly, the Board believes that in order to be able to consummate the Business Combination, it is in the best interests of Plum to obtain the Articles Extension. Therefore, the Board has determined that it is in the best interests of our shareholders to approve the Extension Amendment Proposal so that our shareholders have the opportunity to participate in our future investment.

The Memorandum and Articles of Association provide that Plum has until July 16, 2026 to complete its initial business combination. Plum’s Board has determined that it is in the best interests of Plum to seek an extension of the Termination Date and have Plum’s shareholders approve the Extension Amendment Proposal to allow for a period of additional time to consummate the Business Combination. Without the Articles Extension, Plum believes that Plum will not be able to complete the Business Combination on or before the Termination Date. If that were to occur, Plum would be precluded from completing the Business Combination and would be forced to liquidate.

As contemplated by the Memorandum and Articles of Association, the holders of Plum’s Public Shares, other than the Sponsor, any other shareholders that held any shares in the capital of Plum prior to its initial public offering, and Plum's directors and officers, may elect to redeem all or a portion of their Public Shares in exchange for their pro rata portion of the funds held in a trust account (the “Trust Account”) established to hold a portion of the proceeds of the initial public offering, if the Articles Extension is implemented (the “Redemption”), regardless of how such public shareholders vote in regard to the Extension Amendment Proposal.If the Extension Amendment Proposal is approved by the requisite vote of shareholders, the holders of Public Shares remaining after the Redemption will retain their right to have their Public Shares redeemed in connection with a Business Combination or liquidation, subject to any limitations set forth in the Memorandum and Articles of Association, as amended by the Articles Extension.

On June 12, 2026, the most recent practicable date prior to the date of this proxy statement, the redemption price per share was approximately $10.67, based on the aggregate amount on deposit in the Trust Account, including interest earned on the Trust Account, of approximately $184,121,199 as of June 12, 2026 (which estimate includes an amount of the interest earned on the funds held in the Trust Account to be distributed to Plum in the future to pay taxes and which would not be included in the redemption amount), divided by the total number of then outstanding Public Shares. The Redemption price per share will be calculated based on the aggregate amount on deposit in the Trust Account, including interest earned on the Trust Account, two business days prior to the Shareholder Meeting, less an amount of interest earned on the funds held in the Trust Account to be released to Plum to pay its taxes. The closing price of the Public Shares on the Nasdaq Stock Market LLC on June 12, 2026, was $10.61. Accordingly, if the market price of the Public Shares were to remain the same until the date of the Shareholder Meeting, exercising redemption rights would result in a public shareholder receiving approximately $0.06 more per share than if the shares were sold in the open market (based on the estimated per share redemption price as of June 12, 2026, which estimate includes an amount of interest earned on the funds held in the Trust Account to be released in the future to Plum to pay taxes and which would not be included in the redemption amount). Plum cannot assure shareholders that they will be able to sell their Public Shares in the open market, even if the market price per share is lower than the redemption price stated above, as there may not be sufficient liquidity in its securities when such shareholders wish to sell their shares. Plum believes that such redemption right enables its public shareholders to determine whether to sustain their investments for an additional period if Plum does not complete a Business Combination on or before the Termination Date.

If the Extension Amendment Proposal is not approved, and a Business Combination is not completed on or before the Termination Date, Plum will: (i) cease all operations except for the purpose of winding up; (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released to Plum (less taxes payable and up to $100,000 of interest to pay dissolution expenses), divided by the number of the then-outstanding Public Shares, which redemption will completely extinguish public shareholders’ rights as shareholders (including the right to receive further liquidation distributions, if any); and (iii) as promptly as reasonably possible following such redemption, subject to the approval of Plum’s remaining shareholders and the Board, liquidate and dissolve, subject in each case to Plum’s obligations under Cayman Islands law to provide for claims of creditors and to requirements of other applicable law. There will be no distribution from the Trust Account with respect to Plum’s warrants, which will expire worthless in the event Plum dissolves and liquidates the Trust Account.

Subject to the foregoing, the approval of the Extension Amendment Proposal requires a special resolution under Cayman Islands law, being the affirmative vote of at least a two-thirds majority of the votes cast by the holders of the Ordinary Shares voting as a single class, who are present in person or represented by proxy and entitled to vote thereon, and who vote thereon, at the Shareholder Meeting.

Approval of the Adjournment Proposal requires an ordinary resolution under Cayman Islands law, being the affirmative vote of at least a majority of the votes cast by the holders of the issued Ordinary Shares, voting as a single class, who are present in person or represented by proxy and entitled to vote thereon, and who vote thereon, at the Shareholder Meeting. The Adjournment Proposal will only be put forth for a vote if there are not sufficient votes to approve the Extension Amendment Proposal at the Shareholder Meeting or, if due to redemptions in connection with the Extension Amendment Proposal, Plum would not adhere to the continued listing requirements of the Nasdaq Stock Market LLC.

The Board has fixed the close of business on June 8, 2026 as the date for determining Plum’s shareholders entitled to receive notice of and vote at the Shareholder Meeting and any adjournment thereof. Only holders of record of Ordinary Shares on that date are entitled to have their votes counted at the Shareholder Meeting or any adjournment thereof.

The Board of Plum believes that it is in the best interests of Plum that Plum obtain the Articles Extension. After careful consideration of all relevant factors, the Board has determined that the Extension Amendment Proposal and the Adjournment Proposal are in the best interests of Plum and its shareholders, and has declared it advisable and recommends that you vote or give instruction to vote “FOR” the Extension Amendment proposal and “FOR” the Adjournment Proposal.

Your vote is very important. Whether or not you plan to attend the Shareholder Meeting, please vote as soon as possible by following the instructions in the accompanying proxy statement to make sure that your shares are represented and voted at the Shareholder Meeting. If you hold your shares in “street name” through a bank, broker or other nominee, you will need to follow the instructions provided to you by your bank, broker or other nominee to ensure that your shares are represented and voted at the Shareholder Meeting. Approval of the Extension Amendment Proposal requires a special resolution under Cayman Islands law, being the affirmative vote of at least a two-thirds majority of the votes cast by the holders of the issued Ordinary Shares who are present in person or represented by proxy and entitled to vote thereon, and who vote thereon, at the Shareholder Meeting. Approval of the Adjournment Proposal requires an ordinary resolution under Cayman Islands law, being the affirmative vote of at least a majority of the votes cast by the holders of the issued Ordinary Shares who are present in person or represented by proxy and entitled to vote thereon, and who vote thereon, at the Shareholder Meeting. Accordingly, if you fail to vote in person or by proxy at the Shareholder Meeting, your shares will not be counted for purposes of determining whether the Extension Amendment Proposal and the Adjournment Proposal are approved by the requisite majorities.

If you sign, date and return your proxy card without indicating how you wish to vote, your proxy will be voted FOR each of the proposals presented at the Shareholder Meeting. If you fail to return your proxy card or fail to instruct your bank, broker or other nominee how to vote, and do not attend the Shareholder Meeting in person, the effect will be that your shares will not be counted for purposes of determining whether a quorum is present at the Shareholder Meeting and will not have any effect on whether the proposals are approved. If you are a shareholder of record and you attend the Shareholder Meeting and wish to vote in person, you may withdraw your proxy and vote in person.

TO EXERCISE YOUR REDEMPTION RIGHTS, YOU MUST DEMAND IN WRITING THAT YOUR PUBLIC SHARES ARE REDEEMED FOR A PRO RATA PORTION OF THE FUNDS HELD IN THE TRUST ACCOUNT AND TENDER YOUR SHARES TO PLUM’S TRANSFER AGENT AT LEAST TWO BUSINESS DAYS PRIOR TO THE INITIALLY SCHEDULED DATE OF THE SHAREHOLDER MEETING. IN ORDER TO EXERCISE YOUR REDEMPTION RIGHT, YOU NEED TO IDENTIFY YOURSELF AS A BENEFICIAL HOLDER AND PROVIDE YOUR LEGAL NAME, PHONE NUMBER AND ADDRESS IN YOUR WRITTEN DEMAND. YOU MAY TENDER YOUR SHARES BY EITHER TENDERING OR DELIVERING YOUR SHARES (AND CERTIFICATES (IF ANY) AND OTHER REDEMPTION FORMS) TO THE TRANSFER AGENT OR BY TENDERING OR DELIVERING YOUR SHARES (AND SHARE CERTIFICATES (IF ANY) AND OTHER REDEMPTION FORMS) ELECTRONICALLY USING THE DEPOSITORY TRUST COMPANY’S DWAC (DEPOSIT WITHDRAWAL AT CUSTODIAN) SYSTEM. IF YOU HOLD THE SHARES IN STREET NAME, YOU WILL NEED TO INSTRUCT THE ACCOUNT EXECUTIVE AT YOUR BANK OR BROKER TO WITHDRAW THE SHARES FROM YOUR ACCOUNT IN ORDER TO EXERCISE YOUR REDEMPTION RIGHTS.

Enclosed is the proxy statement containing detailed information about the Shareholder Meeting, the Extension Amendment Proposal and the Adjournment Proposal. Whether or not you plan to attend the Shareholder Meeting, Plum urges you to read this material carefully and vote your shares.

By Order of the Board of Directors of Plum Acquisition Corp. IV

/s/ Kanishka Roy

Kanishka Roy

Chairman

Important Notice Regarding the Availability of Proxy Materials for the Extraordinary General Meeting to be held on July 2, 2026: This notice of meeting and the accompanying proxy statement are available at https://www.cstproxy.com/plumacquisitioncorpiv/2026.

2021 Fillmore St. #2089

San Francisco, California 94115

NOTICE OF AN EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS

OF PLUM ACQUISITION CORP. IV

TO BE HELD ON JULY 2, 2026

To the Shareholders of Plum Acquisition Corp. IV:

NOTICE IS HEREBY GIVEN that an extraordinary general meeting of Plum Acquisition Corp. IV, a Cayman Islands exempted company (“Plum”), will be held on July 2, 2026 at 9:00 a.m., Eastern Time, at the offices of Greenberg Traurig, P.A., located at 777 S. Flagler Drive, Suite 300 East, West Palm Beach, FL 33401, or at such other time, on such other date and at such other place to which the meeting may be adjourned (the “Shareholder Meeting”).

If you wish to attend the Shareholder Meeting in person, you must reserve your attendance at least two business days in advance of the Shareholder Meeting by contacting Plum’s Chief Financial Officer at steven@plumpartners.com by 9:00 a.m., Eastern Time, on June 30, 2026.

You are cordially invited to attend the Shareholder Meeting that will be held for the purpose of considering and voting on (i) an extension amendment proposal to amend, by way of a special resolution, the amended and restated memorandum and articles of association of Plum (as amended, the “Memorandum and Articles of Association”) to extend the date (the “Termination Date”) by which Plum has to consummate a business combination (the “Articles Extension”) from July 16, 2026 (the “Original Termination Date”) to January 16, 2027 (the “Articles Extension Date”) and to allow Plum, without another shareholder vote, to elect to extend the Termination Date to consummate a business combination on a monthly basis for up to six times by an additional one month each time after the Articles Extension Date, by resolution of Plum’s board of directors (the “Board”), if requested by Plum Partners IV, LLC, a Delaware limited liability company (the “Sponsor”), and upon five days’ advance notice to the Board prior to the applicable Termination Date, until July 16, 2027 (each, an “Additional Articles Extension Date”) or a total of up to twelve months after the Original Termination Date, unless the closing of a business combination shall have occurred prior thereto (the “Extension Amendment Proposal”), and (ii) an adjournment proposal to adjourn, by way of ordinary resolution, the Shareholder Meeting to a later date or dates, if necessary, (a) to permit further solicitation and vote of proxies if, based upon the tabulated vote at the time of the Shareholder Meeting, there are insufficient Class A ordinary shares, par value $0.0001 per share (the “Class A Ordinary Shares”) in the capital of Plum and Class B ordinary shares, par value $0.0001 per share (the “Class B Ordinary Shares” and together with the Class A Ordinary Share, the “Ordinary Shares”) represented (either in person or by proxy) to approve the Extension Amendment Proposal or (b) if the holders of Class A Ordinary Shares issued as part of the units sold in Plum’s initial public offering (the “Public Shares”) have elected to redeem an amount of shares in connection with the Extension Amendment Proposal such that Plum would not adhere to the continued listing requirements of the Nasdaq Stock Market LLC (the “Adjournment Proposal”), each as more fully described below in the accompanying proxy statement, which is dated June 15, 2026 and is first being mailed to shareholders on or about that date.

The full text of the proposals to be voted upon at the Shareholder Meeting is as follows:

“In the event that:

Notwithstanding the foregoing or any other provisions of the Articles, in the event that the Company has not consummated a Business Combination by January 16, 2027, the Company may, without another vote of the Shareholders, elect to extend the date to consummatean initial Business Combination on a monthly basis for up to six times by an additional one month each time after January 16, 2027, by resolution of the Directors, if requested by the Sponsor in writing, and upon five days’ advance notice to the Directors prior to the applicable termination date, until July 16, 2027.”

“vote on (i) any Business Combination or any other proposal presented to the Shareholders prior to or in connection with the completion of a Business Combination, or (ii) a proposed amendment to these Articles to extend the time the Company has to consummate a Business Combination beyond January 16, 2027 (or July 16, 2027 if applicable under the provisions of Article 194) or otherwise amend any of the Business Combination Provisions.”

Each of the Extension Amendment Proposal and the Adjournment Proposal is more fully described in the accompanying proxy statement. Please take the time to read carefully each of the proposals in the accompanying proxy statement before you vote.

If the Extension Amendment Proposal is approved and the Articles Extension becomes effective, in the event that Plum has not consummated a business combination by January 16, 2027, without approval of Plum’s shareholders, Plum may, by resolution of the Board, if requested by the Sponsor, and upon five days’ advance notice to the Board prior to the applicable Termination Date, extend the Termination Date up to six times, each by one additional month (for a total of up to six additional months to complete a business combination).

The purpose of the Extension Amendment Proposal is to allow Plum additional time to complete the proposed transactions contemplated by that certain Business Combination Agreement, dated as of March 8, 2026 (as it may be amended, supplemented or otherwise modified from time to time in accordance with its terms, the “Business Combination Agreement”), by and among Plum, Plum IV Merger Sub, Inc., a Delaware corporation and our direct wholly owned subsidiary (“Merger Sub”), and Controlled Thermal Resources Holdings Inc., a Delaware corporation (“CTR”), pursuant to which, among other things and subject to the terms and conditions contained therein, Merger Sub will merge with and into CTR (the “Merger”), with CTR continuing as the surviving company (collectively with the other transactions described in the Business Combination Agreement, the “Business Combination”). For more information about the Business Combination Agreement and the Business Combination, see our Current Report on Form 8-K filed with the U.S. Securities and Exchange Commission (the “SEC”) on March 12, 2026.You are not being asked to vote on a Business Combination at this time.

While Plum and the other parties to the Business Combination Agreement are working towards satisfaction of the conditions to completion of the Proposed Business Combination (the “Closing”), including that Plum and CTR will file a registration statement on Form S-4 (which will include the Plum preliminary proxy statement/prospectus therein), there will not be sufficient time before July 16, 2026 to complete the Business Combination. Accordingly, the Board believes that in order to be able to consummate the Business Combination, it is in the best interests of Plum to obtain the Articles Extension. Therefore, the Board has determined that it is in the best interests of our shareholders to approve the Extension Amendment Proposal so that our shareholders have the opportunity to participate in our future investment.

The Memorandum and Articles of Association provide that Plum has until July 16, 2026, to complete its initial business combination. Plum’s Board has determined that it is in the best interests of Plum to seek an extension of the Termination Date and have Plum’s shareholders approve the Extension Amendment Proposal to allow for a period of additional time to consummate the Business Combination. Without the Articles Extension, Plum believes that Plum will not be able to complete the Business Combination on or before the Termination Date. If that were to occur, Plum would be precluded from completing the Business Combination and would be forced to liquidate.

After careful consideration of all relevant factors, the Board has determined that the Extension Amendment Proposal and the Adjournment Proposal are in the best interests of Plum and its shareholders, has declared it advisable and recommends that you vote or give instruction to vote “FOR” the Extension Amendment Proposal and “FOR” the Adjournment Proposal.

As contemplated by the Memorandum and Articles of Association, the holders of Public Shares, other than the Sponsor, any other shareholders that held any shares in the capital of Plum prior to its initial public offering and Plum's directors and officers, may elect to redeem all or a portion of their Public Shares in exchange for their pro rata portion of the funds held in a trust account (the “Trust Account”) established to hold a portion of the proceeds of the initial public offering (the “Initial Public Offering”), if the Articles Extension is implemented (the “Redemption”), regardless of how such public shareholders vote in regard to the Extension Amendment Proposal.If the Extension Amendment Proposal is approved by the requisite vote of shareholders, the holders of Public Shares remaining after the Redemption will retain their right to have their Public Shares redeemed in connection with a Business Combination or liquidation, subject to any limitations set forth in the Memorandum and Articles of Association, as amended by the Articles Extension.

On June 12, 2026, the most recent practicable date prior to the date of this proxy statement, the redemption price per share was approximately $10.67, based on the aggregate amount on deposit in the Trust Account, including interest earned on the Trust Account, of approximately $184,121,199 as of June 12, 2026 (which estimate includes an amount of the interest earned on the funds held in the Trust Account to be distributed to Plum in the future to pay taxes and which would not be included in the redemption amount), divided by the total number of then outstanding Public Shares. The Redemption price per share will be calculated based on the aggregate amount on deposit in the Trust Account, including interest earned on the Trust Account, two business days prior to the Shareholder Meeting, less an amount of interest earned on the funds held in the Trust Account to be released to Plum to pay its taxes. The closing price of the Public Shares on the Nasdaq Stock Market LLC on June 12, 2026, was $10.61. Accordingly, if the market price of the Public Shares were to remain the same until the date of the Shareholder Meeting, exercising redemption rights would result in a public shareholder receiving approximately $0.06 more per share than if the shares were sold in the open market (based on the estimated per share redemption price as of June 12, 2026, which estimate includes an amount of interest earned on the funds held in the Trust Account to be released in the future to Plum to pay taxes and which would not be included in the redemption amount). Plum cannot assure shareholders that they will be able to sell their Public Shares in the open market, even if the market price per share is lower than the redemption price stated above, as there may not be sufficient liquidity in its securities when such shareholders wish to sell their shares. Plum believes that such redemption right enables its public shareholders to determine whether to sustain their investments for an additional period if Plum does not complete a Business Combination on or before the Termination Date.

If the Extension Amendment Proposal is not approved, and a Business Combination is not completed on or before the Termination Date, Plum will: (i) cease all operations except for the purpose of winding up; (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released to Plum (less taxes payable and up to $100,000 of interest to pay dissolution expenses), divided by the number of the then-outstanding Public Shares, which redemption will completely extinguish public shareholders’ rights as shareholders (including the right to receive further liquidation distributions, if any); and (iii) as promptly as reasonably possible following such redemption, subject to the approval of Plum’s remaining shareholders and the Board, liquidate and dissolve, subject in each case to Plum’s obligations under Cayman Islands law to provide for claims of creditors and to requirements of other applicable law. There will be no distribution from the Trust Account with respect to Plum’s warrants, which will expire worthless in the event Plum dissolves and liquidates the Trust Account.

In the event of a liquidation, the Sponsor and Plum’s officers and directors will not receive any monies held in the Trust Account as a result of their aggregate ownership of the 5,750,000 Class B Ordinary Shares which were issued to the Sponsor prior to the Initial Public Offering, and the 1,010,000 Class A Ordinary Shares, consisting of 440,000 Class A ordinary shares underlying the private placement units and 570,000 restricted private placement shares, which were purchased by the Sponsor in a private placement which occurred simultaneously with the completion of the Initial Public Offering. As a consequence, a liquidating distribution will be made only with respect to the Public Shares.

TO EXERCISE YOUR REDEMPTION RIGHTS, YOU MUST DEMAND IN WRITING THAT YOUR PUBLIC SHARES ARE REDEEMED FOR A PRO RATA PORTION OF THE FUNDS HELD IN THE TRUST ACCOUNT AND TENDER YOUR SHARES TO PLUM’S TRANSFER AGENT AT LEAST TWO BUSINESS DAYS PRIOR TO THE INITIALLY SCHEDULED DATE OF THE SHAREHOLDER MEETING. IN ORDER TO EXERCISE YOUR REDEMPTION RIGHT, YOU NEED TO IDENTIFY YOURSELF AS A BENEFICIAL HOLDER AND PROVIDE YOUR LEGAL NAME, PHONE NUMBER AND ADDRESS IN YOUR WRITTEN DEMAND. YOU MAY TENDER YOUR SHARES BY EITHER TENDERING OR DELIVERING YOUR SHARES (AND CERTIFICATES (IF ANY) AND OTHER REDEMPTION FORMS) TO THE TRANSFER AGENT OR BY TENDERING OR DELIVERING YOUR SHARES (AND SHARE CERTIFICATES (IF ANY) AND OTHER REDEMPTION FORMS) ELECTRONICALLY USING THE DEPOSITORY TRUST COMPANY’S DWAC (DEPOSIT WITHDRAWAL AT CUSTODIAN) SYSTEM. IF YOU HOLD THE SHARES IN STREET NAME, YOU WILL NEED TO INSTRUCT THE ACCOUNT EXECUTIVE AT YOUR BANK OR BROKER TO WITHDRAW THE SHARES FROM YOUR ACCOUNT IN ORDER TO EXERCISE YOUR REDEMPTION RIGHTS.

Subject to the foregoing, the approval of the Extension Amendment Proposal requires a special resolution under Cayman Islands law, being the affirmative vote of at least a two-thirds majority of the votes cast by the holders of the Ordinary Shares voting as a single class, who are present in person or represented by proxy and entitled to vote thereon, and who vote thereon, at the Shareholder Meeting.

Approval of the Adjournment Proposal requires an ordinary resolution under Cayman Islands law, being the affirmative vote of at least a majority of the votes cast by the holders of the issued Ordinary Shares, voting as a single class, who are present in person or represented by proxy and entitled to vote thereon, and who vote thereon, at the Shareholder Meeting. The Adjournment Proposal will only be put forth for a vote if there are not sufficient votes to approve the Extension Amendment Proposal at the Shareholder Meeting or, if due to redemptions in connection with the Extension Amendment Proposal, Plum would not adhere to the continued listing requirements of the Nasdaq Stock Market LLC.

Record holders of Ordinary Shares at the close of business on June 8, 2026 (the “Record Date”) are entitled to vote or have their votes cast at the Shareholder Meeting. On the Record Date, there were 24,242,875 issued and outstanding Ordinary Shares. Plum’s warrants do not have voting rights.

The Sponsor and the officers and directors of Plum (the “Initial Shareholders”) intend to vote all of their Ordinary Shares in favor of the proposals being presented at the Shareholder Meeting. As of the date of the accompanying proxy statement, the Initial Shareholders hold 27.9% of the issued and outstanding Ordinary Shares and Plum’s officers and directors have not purchased any Public Shares, but may do so at any time. As a result, in addition to the Initial Shareholders, (i) approval of the Extension Amendment Proposal will require the affirmative vote of holders of holders of at least 9,401,917 Class A Ordinary Shares if all Ordinary Shares are represented at the Shareholder Meeting and cast votes (or approximately 51.0% of the Class A Ordinary Shares), and the affirmative vote of holders of at least 1,320,959 Class A Ordinary Shares (or approximately 7.1% of the Class A Ordinary Shares)if only such shares as are required to establish a quorum are represented at the Shareholder Meeting and cast votes; and (ii) approval of the Adjournment Proposal will require the affirmative vote of at least 5,361,438 Class A Ordinary Shares (or approximately 29.0% of the Class A Ordinary Shares) if all Ordinary Shares are represented at the Shareholder Meeting and cast votes, and no additional holders of Class A Ordinary Shares if only such shares as are required to establish a quorum are represented at the Shareholder Meeting and cast votes.

The accompanying proxy statement contains important information about the Shareholder Meeting, the Extension Amendment Proposal and the Adjournment Proposal. Whether or not you plan to attend the Shareholder Meeting, Plum urges you to read this material carefully and vote your shares.

The accompanying proxy statement is dated June 15, 2026, and is first being mailed to shareholders on or about that date.

By Order of the Board of Directors of Plum Acquisition Corp. IV

/s/ Kanishka Roy

Kanishka Roy

Chairman

June 15, 2026

TABLE OF CONTENTS

i

PROXY STATEMENT

FOR

AN EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS

TO BE HELD ON JULY 2, 2026

This proxy statement and the enclosed form of proxy are furnished in connection with the solicitation of proxies by our board of directors (the “Board”) for use at the extraordinary general meeting of Plum Acquisition Corp. IV, a Cayman Islands exempted company (“Plum,” “we,” “us” or “our”), which will be held on July 2, 2026, at 9:00 a.m., Eastern Time, at the offices of Greenberg Traurig, P.A. located at 777 S. Flagler Drive, Suite 300 East, West Palm Beach, FL 33401, or at such other time, on such other date and at such other place to which the meeting may be adjourned (the “Shareholder Meeting”).

YOUR VOTE IS IMPORTANT. It is important that your shares be represented at the Shareholder Meeting, regardless of the number of shares that you hold. You are, therefore, urged to execute and return, at your earliest convenience, the enclosed proxy card in the envelope that has also been provided.