# EDGAR Filing Document

**Accession Number:** 0002074603
**File Stem:** 0001213900-25-061612
**Filing Date:** 2025-7
**Character Count:** 57321
**Document Hash:** 132099d012939d0e4ddfcf6d95c9eaaf
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-25-061612.hdr.sgml**: 20250703

**ACCESSION NUMBER**: 0001213900-25-061612

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250703

**DATE AS OF CHANGE**: 20250703

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Yorkville Acquisition Corp.
- **CENTRAL INDEX KEY:** 0002064658
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-95102
- **FILM NUMBER:** 251106867

**BUSINESS ADDRESS:**
- **STREET 1:** 1012 SPRINGFIELD AVENUE
- **CITY:** MOUNTAINSIDE
- **STATE:** NJ
- **ZIP:** 07092
- **BUSINESS PHONE:** 9999999999

**MAIL ADDRESS:**
- **STREET 1:** 1012 SPRINGFIELD AVENUE
- **CITY:** MOUNTAINSIDE
- **STATE:** NJ
- **ZIP:** 07092
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Yorkville Acquisition Sponsor LLC
- **CENTRAL INDEX KEY:** 0002074603

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D

**BUSINESS ADDRESS:**
- **STREET 1:** 1012 SPRINGFIELD AVENUE
- **CITY:** MOUNTAINSIDE
- **STATE:** NJ
- **ZIP:** 07092
- **BUSINESS PHONE:** 201.985.8300

**MAIL ADDRESS:**
- **STREET 1:** 1012 SPRINGFIELD AVENUE
- **CITY:** MOUNTAINSIDE
- **STATE:** NJ
- **ZIP:** 07092

## Exhibit 99.1

**Exhibit 99.1**

**JOINT FILING AGREEMENT**

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a Statement on Schedule 13D (including any and all amendments thereto) with respect to the Class A ordinary shares, $0.0001 par value per share, of Yorkville Acquisition Corp., and further agree that this Joint Filing Agreement shall be included as an Exhibit to such joint filings.

The undersigned further agree that each party hereto is responsible for the timely filing of such Statement on Schedule 13D and any amendments thereto, and for the accuracy and completeness of the information concerning such party contained therein; provided, however, that no party is responsible for the accuracy or completeness of the information concerning any other party, unless such party knows or has reason to believe that such information is inaccurate.

This Joint Filing Agreement may be signed in counterparts with the same effect as if the signature on each counterpart were upon the same instrument.

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the 3rd day of July, 2025.

---

| | |
|:---|:---|
| **YORKVILLE ACQUISITION SPONSOR LLC** | **YORKVILLE ACQUISITION SPONSOR LLC** |
| **Signature:** | /s/ Leslie Brault |
| **Name/Title:** | Leslie Brault, Attorney-in-fact |
| **Date:** | July 3, 2025 |
| **YA II PN, LTD.** | **YA II PN, LTD.** |
| **Signature:** | /s/ David Gonzalez |
| **Name/Title:** | David Gonzalez, General Counsel |
| **Date:** | July 3, 2025 |
| **YA GLOBAL INVESTMENTS II (U.S.), LP** | **YA GLOBAL INVESTMENTS II (U.S.), LP** |
| **Signature:** | /s/ David Gonzalez |
| **Name/Title:** | David Gonzalez, General Counsel |
| **Date:** | July 3, 2025 |
| **YORKVILLE ADVISORS GLOBAL, LP** | **YORKVILLE ADVISORS GLOBAL, LP** |
| **Signature:** | /s/ David Gonzalez |
| **Name/Title:** | David Gonzalez, General Counsel |
| **Date:** | July 3, 2025 |
| **YORKVILLE ADVISORS GLOBAL II, LLC** | **YORKVILLE ADVISORS GLOBAL II, LLC** |
| **Signature:** | /s/ David Gonzalez |
| **Name/Title:** | David Gonzalez, General Counsel |
| **Date:** | July 3, 2025 |
| **YAII GP, LP** | **YAII GP, LP** |
| **Signature:** | /s/ David Gonzalez |
| **Name/Title:** | David Gonzalez, General Counsel |
| **Date:** | July 3, 2025 |
| **YAII GP II, LLC** | **YAII GP II, LLC** |
| **Signature:** | /s/ David Gonzalez |
| **Name/Title:** | David Gonzalez, General Counsel |
| **Date:** | July 3, 2025 |
| **MARK ANGELO** | **MARK ANGELO** |
| **Signature:** | /s/ Leslie Brault |
| **Name/Title:** | Leslie Brault, Attorney-in-fact |
| **Date:** | July 3, 2025 |
| **SC-SIGMA GLOBAL PARTNERS, LP** | **SC-SIGMA GLOBAL PARTNERS, LP** |
| **Signature:** | /s/ David Gonzalez |
| **Name/Title:** | David Gonzalez, General Counsel |
| **Date:** | July 3, 2025 |

---

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**Yorkville Acquisition Corp.**

*(Name of Issuer)*

**Class A Ordinary Shares, $0.0001 par value**

*(Title of Class of Securities)*

**G98659116**

*(CUSIP Number)*

**Yorkville Acquisition Corp.**<br>c/o Yorkville Acquisition Sponsor LLC<br>1012 Springfield Avenue<br>Mountainside NJ 07092<br>(201) 985-8300

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**06/26/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **G98659116** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Yorkville Acquisition Sponsor LLC** | Name of reporting person<br>**Yorkville Acquisition Sponsor LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**6101825.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**6101825.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.88%** | Percent of class represented by amount in Row (11)<br>**25.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** (1) Includes 351,825 of the Issuer's Class A ordinary shares, $0.0001 par value ("Class A Ordinary Shares") and 5,750,000 of the Issuer's Class B ordinary shares, $0.0001 par value ("Class B Ordinary Shares" and, together with the Class A Ordinary Shares, the "Ordinary Shares"), which are automatically convertible into Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as more fully described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286569). The 351,825 Class A Ordinary Shares are included in the placement units (each unit consisting of one Class A Ordinary Share and one-third of one warrant , each whole warrant exercisable into one Class A Ordinary Share 30 days following the consummation of the Issuer's initial business combination), acquired pursuant to a Private Placement Units Purchase Agreement by and between the Issuer and Yorkville Acquisition Sponsor LLC (the "Sponsor"). YA II PN, Ltd. ("YA II PN") is the sole managing member of the Sponsor and has voting and investment discretion over the securities held by the Sponsor. YA II PN is beneficially owned by YA Global Investments II (U.S.), LP ("YA Feeder"), whose general partner is YAII GP, LP ("YA GP"). The general partner of YA GP is YAII GP II, LLC ("Yorkville GP"). Yorkville Advisors Global, LP ("Yorkville LP") serves as the investment manager to both YA II PN and SC-Sigma Global Partners, LP ("SC-Sigma"), an investor in YA II PN. Yorkville Advisors Global II, LLC ("Yorkville LLC") is the general partner of Yorkville LP. Mark Angelo, President and Managing Member of Yorkville LLC and a Director of the Issuer, makes all investment decisions for YA II PN. Each of the Reporting Persons may be considered affiliates and may be deemed to have beneficial ownership of the Class B Ordinary Shares held by the Sponsor. Each Reporting Person disclaims beneficial ownership of the reported shares except to the extent of any pecuniary interest therein, directly or indirectly.

| **CUSIP No.** | **G98659116** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**YA II PN, Ltd.** | Name of reporting person<br>**YA II PN, Ltd.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**CAYMAN ISLANDS** | Citizenship or place of organization<br>**CAYMAN ISLANDS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6101825.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6101825.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.88%** | Percent of class represented by amount in Row (11)<br>**25.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** (1) Includes 351,825 of the Issuer's Class A ordinary shares, $0.0001 par value ("Class A Ordinary Shares") and 5,750,000 of the Issuer's Class B ordinary shares, $0.0001 par value ("Class B Ordinary Shares" and, together with the Class A Ordinary Shares, the "Ordinary Shares"), which are automatically convertible into Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as more fully described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286569). The 351,825 Class A Ordinary Shares are included in the placement units (each unit consisting of one Class A Ordinary Share and one-third of one warrant , each whole warrant exercisable into one Class A Ordinary Share 30 days following the consummation of the Issuer's initial business combination), acquired pursuant to a Private Placement Units Purchase Agreement by and between the Issuer and Yorkville Acquisition Sponsor LLC (the "Sponsor"). YA II PN, Ltd. ("YA II PN") is the sole managing member of the Sponsor and has voting and investment discretion over the securities held by the Sponsor. YA II PN is beneficially owned by YA Global Investments II (U.S.), LP ("YA Feeder"), whose general partner is YAII GP, LP ("YA GP"). The general partner of YA GP is YAII GP II, LLC ("Yorkville GP"). Yorkville Advisors Global, LP ("Yorkville LP") serves as the investment manager to both YA II PN and SC-Sigma Global Partners, LP ("SC-Sigma"), an investor in YA II PN. Yorkville Advisors Global II, LLC ("Yorkville LLC") is the general partner of Yorkville LP. Mark Angelo, President and Managing Member of Yorkville LLC and a Director of the Issuer, makes all investment decisions for YA II PN. Each of the Reporting Persons may be considered affiliates and may be deemed to have beneficial ownership of the Class B Ordinary Shares held by the Sponsor. Each Reporting Person disclaims beneficial ownership of the reported shares except to the extent of any pecuniary interest therein, directly or indirectly.

| **CUSIP No.** | **G98659116** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**YA Global Investments II (U.S.), LP** | Name of reporting person<br>**YA Global Investments II (U.S.), LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6101825.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6101825.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.88%** | Percent of class represented by amount in Row (11)<br>**25.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** (1) Includes 351,825 of the Issuer's Class A ordinary shares, $0.0001 par value ("Class A Ordinary Shares") and 5,750,000 of the Issuer's Class B ordinary shares, $0.0001 par value ("Class B Ordinary Shares" and, together with the Class A Ordinary Shares, the "Ordinary Shares"), which are automatically convertible into Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as more fully described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286569). The 351,825 Class A Ordinary Shares are included in the placement units (each unit consisting of one Class A Ordinary Share and one-third of one warrant , each whole warrant exercisable into one Class A Ordinary Share 30 days following the consummation of the Issuer's initial business combination), acquired pursuant to a Private Placement Units Purchase Agreement by and between the Issuer and Yorkville Acquisition Sponsor LLC (the "Sponsor"). YA II PN, Ltd. ("YA II PN") is the sole managing member of the Sponsor and has voting and investment discretion over the securities held by the Sponsor. YA II PN is beneficially owned by YA Global Investments II (U.S.), LP ("YA Feeder"), whose general partner is YAII GP, LP ("YA GP"). The general partner of YA GP is YAII GP II, LLC ("Yorkville GP"). Yorkville Advisors Global, LP ("Yorkville LP") serves as the investment manager to both YA II PN and SC-Sigma Global Partners, LP ("SC-Sigma"), an investor in YA II PN. Yorkville Advisors Global II, LLC ("Yorkville LLC") is the general partner of Yorkville LP. Mark Angelo, President and Managing Member of Yorkville LLC and a Director of the Issuer, makes all investment decisions for YA II PN. Each of the Reporting Persons may be considered affiliates and may be deemed to have beneficial ownership of the Class B Ordinary Shares held by the Sponsor. Each Reporting Person disclaims beneficial ownership of the reported shares except to the extent of any pecuniary interest therein, directly or indirectly.

| **CUSIP No.** | **G98659116** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Yorkville Advisors Global, LP** | Name of reporting person<br>**Yorkville Advisors Global, LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6101825.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6101825.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.88%** | Percent of class represented by amount in Row (11)<br>**25.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** (1) Includes 351,825 of the Issuer's Class A ordinary shares, $0.0001 par value ("Class A Ordinary Shares") and 5,750,000 of the Issuer's Class B ordinary shares, $0.0001 par value ("Class B Ordinary Shares" and, together with the Class A Ordinary Shares, the "Ordinary Shares"), which are automatically convertible into Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as more fully described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286569). The 351,825 Class A Ordinary Shares are included in the placement units (each unit consisting of one Class A Ordinary Share and one-third of one warrant , each whole warrant exercisable into one Class A Ordinary Share 30 days following the consummation of the Issuer's initial business combination), acquired pursuant to a Private Placement Units Purchase Agreement by and between the Issuer and Yorkville Acquisition Sponsor LLC (the "Sponsor"). YA II PN, Ltd. ("YA II PN") is the sole managing member of the Sponsor and has voting and investment discretion over the securities held by the Sponsor. YA II PN is beneficially owned by YA Global Investments II (U.S.), LP ("YA Feeder"), whose general partner is YAII GP, LP ("YA GP"). The general partner of YA GP is YAII GP II, LLC ("Yorkville GP"). Yorkville Advisors Global, LP ("Yorkville LP") serves as the investment manager to both YA II PN and SC-Sigma Global Partners, LP ("SC-Sigma"), an investor in YA II PN. Yorkville Advisors Global II, LLC ("Yorkville LLC") is the general partner of Yorkville LP. Mark Angelo, President and Managing Member of Yorkville LLC and a Director of the Issuer, makes all investment decisions for YA II PN. Each of the Reporting Persons may be considered affiliates and may be deemed to have beneficial ownership of the Class B Ordinary Shares held by the Sponsor. Each Reporting Person disclaims beneficial ownership of the reported shares except to the extent of any pecuniary interest therein, directly or indirectly.

| **CUSIP No.** | **G98659116** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Yorkville Advisors Global II, LLC** | Name of reporting person<br>**Yorkville Advisors Global II, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6101825.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6101825.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.88%** | Percent of class represented by amount in Row (11)<br>**25.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** (1) Includes 351,825 of the Issuer's Class A ordinary shares, $0.0001 par value ("Class A Ordinary Shares") and 5,750,000 of the Issuer's Class B ordinary shares, $0.0001 par value ("Class B Ordinary Shares" and, together with the Class A Ordinary Shares, the "Ordinary Shares"), which are automatically convertible into Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as more fully described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286569). The 351,825 Class A Ordinary Shares are included in the placement units (each unit consisting of one Class A Ordinary Share and one-third of one warrant , each whole warrant exercisable into one Class A Ordinary Share 30 days following the consummation of the Issuer's initial business combination), acquired pursuant to a Private Placement Units Purchase Agreement by and between the Issuer and Yorkville Acquisition Sponsor LLC (the "Sponsor"). YA II PN, Ltd. ("YA II PN") is the sole managing member of the Sponsor and has voting and investment discretion over the securities held by the Sponsor. YA II PN is beneficially owned by YA Global Investments II (U.S.), LP ("YA Feeder"), whose general partner is YAII GP, LP ("YA GP"). The general partner of YA GP is YAII GP II, LLC ("Yorkville GP"). Yorkville Advisors Global, LP ("Yorkville LP") serves as the investment manager to both YA II PN and SC-Sigma Global Partners, LP ("SC-Sigma"), an investor in YA II PN. Yorkville Advisors Global II, LLC ("Yorkville LLC") is the general partner of Yorkville LP. Mark Angelo, President and Managing Member of Yorkville LLC and a Director of the Issuer, makes all investment decisions for YA II PN. Each of the Reporting Persons may be considered affiliates and may be deemed to have beneficial ownership of the Class B Ordinary Shares held by the Sponsor. Each Reporting Person disclaims beneficial ownership of the reported shares except to the extent of any pecuniary interest therein, directly or indirectly.

| **CUSIP No.** | **G98659116** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**YAII GP, LP** | Name of reporting person<br>**YAII GP, LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6101825.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6101825.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.88%** | Percent of class represented by amount in Row (11)<br>**25.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** (1) Includes 351,825 of the Issuer's Class A ordinary shares, $0.0001 par value ("Class A Ordinary Shares") and 5,750,000 of the Issuer's Class B ordinary shares, $0.0001 par value ("Class B Ordinary Shares" and, together with the Class A Ordinary Shares, the "Ordinary Shares"), which are automatically convertible into Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as more fully described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286569). The 351,825 Class A Ordinary Shares are included in the placement units (each unit consisting of one Class A Ordinary Share and one-third of one warrant , each whole warrant exercisable into one Class A Ordinary Share 30 days following the consummation of the Issuer's initial business combination), acquired pursuant to a Private Placement Units Purchase Agreement by and between the Issuer and Yorkville Acquisition Sponsor LLC (the "Sponsor"). YA II PN, Ltd. ("YA II PN") is the sole managing member of the Sponsor and has voting and investment discretion over the securities held by the Sponsor. YA II PN is beneficially owned by YA Global Investments II (U.S.), LP ("YA Feeder"), whose general partner is YAII GP, LP ("YA GP"). The general partner of YA GP is YAII GP II, LLC ("Yorkville GP"). Yorkville Advisors Global, LP ("Yorkville LP") serves as the investment manager to both YA II PN and SC-Sigma Global Partners, LP ("SC-Sigma"), an investor in YA II PN. Yorkville Advisors Global II, LLC ("Yorkville LLC") is the general partner of Yorkville LP. Mark Angelo, President and Managing Member of Yorkville LLC and a Director of the Issuer, makes all investment decisions for YA II PN. Each of the Reporting Persons may be considered affiliates and may be deemed to have beneficial ownership of the Class B Ordinary Shares held by the Sponsor. Each Reporting Person disclaims beneficial ownership of the reported shares except to the extent of any pecuniary interest therein, directly or indirectly.

| **CUSIP No.** | **G98659116** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**YAII GP II, LLC** | Name of reporting person<br>**YAII GP II, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6101825.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6101825.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.88%** | Percent of class represented by amount in Row (11)<br>**25.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** (1) Includes 351,825 of the Issuer's Class A ordinary shares, $0.0001 par value ("Class A Ordinary Shares") and 5,750,000 of the Issuer's Class B ordinary shares, $0.0001 par value ("Class B Ordinary Shares" and, together with the Class A Ordinary Shares, the "Ordinary Shares"), which are automatically convertible into Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as more fully described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286569). The 351,825 Class A Ordinary Shares are included in the placement units (each unit consisting of one Class A Ordinary Share and one-third of one warrant , each whole warrant exercisable into one Class A Ordinary Share 30 days following the consummation of the Issuer's initial business combination), acquired pursuant to a Private Placement Units Purchase Agreement by and between the Issuer and Yorkville Acquisition Sponsor LLC (the "Sponsor"). YA II PN, Ltd. ("YA II PN") is the sole managing member of the Sponsor and has voting and investment discretion over the securities held by the Sponsor. YA II PN is beneficially owned by YA Global Investments II (U.S.), LP ("YA Feeder"), whose general partner is YAII GP, LP ("YA GP"). The general partner of YA GP is YAII GP II, LLC ("Yorkville GP"). Yorkville Advisors Global, LP ("Yorkville LP") serves as the investment manager to both YA II PN and SC-Sigma Global Partners, LP ("SC-Sigma"), an investor in YA II PN. Yorkville Advisors Global II, LLC ("Yorkville LLC") is the general partner of Yorkville LP. Mark Angelo, President and Managing Member of Yorkville LLC and a Director of the Issuer, makes all investment decisions for YA II PN. Each of the Reporting Persons may be considered affiliates and may be deemed to have beneficial ownership of the Class B Ordinary Shares held by the Sponsor. Each Reporting Person disclaims beneficial ownership of the reported shares except to the extent of any pecuniary interest therein, directly or indirectly.

| **CUSIP No.** | **G98659116** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Mark Angelo** | Name of reporting person<br>**Mark Angelo** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6101825.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6101825.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.88%** | Percent of class represented by amount in Row (11)<br>**25.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** (1) Includes 351,825 of the Issuer's Class A ordinary shares, $0.0001 par value ("Class A Ordinary Shares") and 5,750,000 of the Issuer's Class B ordinary shares, $0.0001 par value ("Class B Ordinary Shares" and, together with the Class A Ordinary Shares, the "Ordinary Shares"), which are automatically convertible into Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as more fully described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286569). The 351,825 Class A Ordinary Shares are included in the placement units (each unit consisting of one Class A Ordinary Share and one-third of one warrant , each whole warrant exercisable into one Class A Ordinary Share 30 days following the consummation of the Issuer's initial business combination), acquired pursuant to a Private Placement Units Purchase Agreement by and between the Issuer and Yorkville Acquisition Sponsor LLC (the "Sponsor"). YA II PN, Ltd. ("YA II PN") is the sole managing member of the Sponsor and has voting and investment discretion over the securities held by the Sponsor. YA II PN is beneficially owned by YA Global Investments II (U.S.), LP ("YA Feeder"), whose general partner is YAII GP, LP ("YA GP"). The general partner of YA GP is YAII GP II, LLC ("Yorkville GP"). Yorkville Advisors Global, LP ("Yorkville LP") serves as the investment manager to both YA II PN and SC-Sigma Global Partners, LP ("SC-Sigma"), an investor in YA II PN. Yorkville Advisors Global II, LLC ("Yorkville LLC") is the general partner of Yorkville LP. Mark Angelo, President and Managing Member of Yorkville LLC and a Director of the Issuer, makes all investment decisions for YA II PN. Each of the Reporting Persons may be considered affiliates and may be deemed to have beneficial ownership of the Class B Ordinary Shares held by the Sponsor. Each Reporting Person disclaims beneficial ownership of the reported shares except to the extent of any pecuniary interest therein, directly or indirectly.

| **CUSIP No.** | **G98659116** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**SC-Sigma Global Partners, LP** | Name of reporting person<br>**SC-Sigma Global Partners, LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6101825.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6101825.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | Aggregate amount beneficially owned by each reporting person<br>**6101825.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.88%** | Percent of class represented by amount in Row (11)<br>**25.88%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** (1) Includes 351,825 of the Issuer's Class A ordinary shares, $0.0001 par value ("Class A Ordinary Shares") and 5,750,000 of the Issuer's Class B ordinary shares, $0.0001 par value ("Class B Ordinary Shares" and, together with the Class A Ordinary Shares, the "Ordinary Shares"), which are automatically convertible into Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as more fully described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286569). The 351,825 Class A Ordinary Shares are included in the placement units (each unit consisting of one Class A Ordinary Share and one-third of one warrant , each whole warrant exercisable into one Class A Ordinary Share 30 days following the consummation of the Issuer's initial business combination), acquired pursuant to a Private Placement Units Purchase Agreement by and between the Issuer and Yorkville Acquisition Sponsor LLC (the "Sponsor"). YA II PN, Ltd. ("YA II PN") is the sole managing member of the Sponsor and has voting and investment discretion over the securities held by the Sponsor. YA II PN is beneficially owned by YA Global Investments II (U.S.), LP ("YA Feeder"), whose general partner is YAII GP, LP ("YA GP"). The general partner of YA GP is YAII GP II, LLC ("Yorkville GP"). Yorkville Advisors Global, LP ("Yorkville LP") serves as the investment manager to both YA II PN and SC-Sigma Global Partners, LP ("SC-Sigma"), an investor in YA II PN. Yorkville Advisors Global II, LLC ("Yorkville LLC") is the general partner of Yorkville LP. Mark Angelo, President and Managing Member of Yorkville LLC and a Director of the Issuer, makes all investment decisions for YA II PN. Each of the Reporting Persons may be considered affiliates and may be deemed to have beneficial ownership of the Class B Ordinary Shares held by the Sponsor. Each Reporting Person disclaims beneficial ownership of the reported shares except to the extent of any pecuniary interest therein, directly or indirectly.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Class A Ordinary Shares, $0.0001 par value

**(b) Name of Issuer:**
Yorkville Acquisition Corp.

**(c) Address of Issuer's Principal Executive Offices:**
c/o Yorkville Acquisition Sponsor LLC, 1012 Springfield Avenue, Mountainside, NJ, 07092

**Item 4. Purpose of Transaction**

In connection with the organization of the Issuer, on March 5, 2025, 5,750,000 Class B Ordinary Shares (the "Founder Shares") were purchased by the Sponsor for the amount of $25,000, pursuant to a Securities Subscription Agreement, dated as of March 5, 2025, by and between the Sponsor and the Issuer (the "Securities Subscription Agreement"), as more fully described in Item 6 of this Schedule 13D which information is incorporated herein by reference. On June 30, 2025, simultaneously with the consummation of the Issuer's Initial Public Offering (the "IPO"), the Sponsor purchased 351,825 units ("Placement Units") of the Issuer at $10.00 per Placement Unit, pursuant to a Private Placement Units Purchase Agreement, dated as of June 26, 2025, by and between the Issuer and the Sponsor (the "Placement Units Purchase Agreement"), as more fully described in Item 6 of this Schedule 13D, which information is incorporated herein by reference. Each Placement Unit consists of one Class A Ordinary Share and one-third of a warrant, with each whole warrant exercisable into one Class A ordinary share at an exercise price of $11.50, subject to adjustment, commencing 30 days following the consummation of the Issuer's initial business combination (as described more fully in the Issuer's Final Prospectus dated June 26, 2025). The Ordinary Shares owned by the Reporting Persons have been acquired for investment purposes. The Reporting Persons may make further acquisitions of the Ordinary Shares from time to time and, subject to certain restrictions, may dispose of any or all of the Ordinary Shares held by the Reporting Persons at any time depending on an ongoing evaluation of the investment in such securities, prevailing market conditions, other investment opportunities and other factors. However, certain of such shares are subject to certain lock-up restrictions as further described in Item 6 below. Except for the foregoing, the Reporting Persons have no plans or proposals which relate to, or could result in, any of the matters referred to in paragraphs (a) and (c) through (j) of Item 4 of Schedule 13D. With respect to paragraph (b) of Item 4, the Issuer is a blank check company formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses. Under various agreements between the Issuer and the Reporting Persons as further described in Item 6 below, the Reporting Persons have agreed (A) to vote their shares in favor of any proposed business combination and (B) not to redeem any shares in connection with a shareholder vote (or tender offer) to approve (or in connection with) a proposed initial business combination. The Reporting Persons may, at any time and from time to time, review or reconsider their position, change their purpose or formulate plans or proposals with respect to the Issuer.

**Item 5. Interest in Securities of the Issuer**

**(a)**
The responses to Items 7 - 13 of the cover pages of this Schedule 13D are incorporated herein by reference. The aggregate number and percentage of Ordinary Shares beneficially or directly owned by the Reporting Persons is based upon a total of 23,581,250 Ordinary Shares outstanding as of June 30, 2025, including (i) 229,425 Class A Ordinary Shares, (ii) 17,250,000 Class A Ordinary Shares underlying the Units issued in the IPO, (iii) 351,825 Class A Ordinary Shares underlying the Placement Units and (iv) 5,750,000 Class A Ordinary Shares issuable upon conversion of the Class B Ordinary Shares. The Reporting Persons beneficially own 6,101,825 Ordinary Shares, representing approximately 25.88% issued and outstanding Ordinary Shares.

**(b)**
The responses to Items 7 - 13 of the cover pages of this Schedule 13D are incorporated herein by reference. The aggregate number and percentage of Ordinary Shares beneficially or directly owned by the Reporting Persons is based upon a total of 23,581,250 Ordinary Shares outstanding as of June 30, 2025, including (i) 229,425 Class A Ordinary Shares, (ii) 17,250,000 Class A Ordinary Shares underlying the Units issued in the IPO, (iii) 351,825 Class A Ordinary Shares underlying the placement units and (iv) 5,750,000 Class A Ordinary Shares issuable upon conversion of the Class B Ordinary Shares. The Reporting Persons beneficially own 6,101,825 Ordinary Shares, representing approximately 25.88% issued and outstanding Ordinary Shares.

**(c)**
None of the Reporting Persons has effected any transactions of Ordinary Shares during the 60 days preceding the date of this report, except as described in Item 4 and Item 6 of this Schedule 13D, which information is incorporated herein by reference.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Founder Share Purchase Agreement between the Issuer and Sponsor

In connection with the organization of the Issuer, on March 5, 2025, 5,750,000 Class B Ordinary Shares (the "Founder Shares") were purchased by the Sponsor for the amount of $25,000, pursuant to a Securities Subscription Agreement, dated as of March 5, 2025, by and between the Sponsor and the Issuer (the "Securities Subscription Agreement").

The description of the Securities Subscription Agreement is qualified in its entirety by reference to the full text of such agreement, a copy of which was filed as Exhibit 10.5 to the Registration Statement on Form S-1 initially filed by the Issuer with the SEC on April 16, 2025 (and is incorporated by reference herein as Exhibit 10.1). In March 2025, the Issuer effected share capitalizations resulting in the Sponsor holding an aggregate of 5,750,000 Founder Shares.

Placement Units Purchase Agreement between the Issuer and Sponsor

On June 26, 2025, simultaneously with the consummation of the IPO, the Sponsor purchased 351,825 Placement Units pursuant to the Placement Units Purchase Agreement. The Placement Units and the securities underlying such Placement Units are subject to a lock-up provision in the Placement Units Purchase Agreement, which provides that such securities shall not be transferable, saleable or assignable until 30 days after the consummation of the Issuer's initial business combination, subject to certain limited exceptions as described in the Letter Agreement (as defined below).

The description of the Placement Units Purchase Agreement is qualified in its entirety by reference to the full text of such agreement, a copy of which was filed by the Issuer as Exhibit 10.4 to the Current Report on Form 8-K filed by the Issuer with the SEC on June 30, 2025 (and is incorporated by reference herein as Exhibit 10.2).

Letter Agreement by and among the Issuer, the Issuer's officers and directors, and the Sponsor

On June 26, 2025, in connection with the IPO, the Issuer, the Sponsor, Mr. Angelo and certain other parties thereto entered into a letter agreement (the "Letter Agreement"). Pursuant to the Letter Agreement, the Sponsor and Mr. Angelo agreed (A) to vote their Founder Shares and any Ordinary Shares underlying the Placement Units and any public shares in favor of any proposed business combination, (B) not to propose an amendment to the Issuer's Amended and Restated Memorandum and Articles of Association (the "Charter") (i) that would modify the substance or timing of the Issuer's obligation to allow redemption in connection with its initial business combination or to redeem 100% of its public shares it does not complete our initial business combination within the completion window or (ii) with respect to the other material provisions relating to the rights of holders of Class A Ordinary Shares or pre-business combination activity, unless the Issuer provides the holders of public shares with the opportunity to redeem such shares upon approval of any such amendment at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Issuer's trust account set up in connection with the IPO (the "Trust Account") including interest earned on the funds held in the Trust Account and net of amounts withdrawn to pay the Issuer's taxes, divided by the number of then outstanding public shares, (C) not to redeem any Ordinary Shares in connection with a shareholder vote to approve the Issuer's proposed initial business combination or a vote to amend the provisions of the Issuer's Amended and Restated Memorandum and Articles of Association relating to shareholders' rights or pre-business combination activity and (D) that the Founder Shares and any Ordinary Shares underlying the Placement Units shall not participate in any liquidating distribution upon winding up if a business combination is not consummated. The Sponsor also agreed that, in the event of the liquidation of the Trust Account of the Issuer upon the failure of the Issuer to consummate an initial business combination within the time period set forth in the Charter, it will indemnify and hold harmless the Issuer against any and all loss, liability, claims, damage and expense whatsoever which the Issuer may become subject to as a result of any claim by any vendor or other person who is owed money by the Issuer for services rendered or products sold to or contracted for the Issuer, by any target business with which the Issuer has entered into a written letter of intent, confidentiality or other similar agreement or business combination agreement, or any taxing authority, but only to the extent necessary to ensure that such loss, liability, claim, damage or expense does not reduce the amount of funds in the Trust Account below (i) $10.05 per public share or (ii) such lesser amount per public share held in the Trust Account as of the date of the liquidation of the Trust Account, due to reductions in value of the trust assets, in each case net of amounts withdrawn to pay income taxes and up to $100,000 to pay liquidation and dissolution expenses; provided that such indemnity shall not apply if such vendor or prospective target business executes a waiver of any and all rights to the monies held in the Trust Account.

The description of the Insider Letter is qualified in its entirety by reference to the full text of such agreement, a copy of which was filed by the Issuer as Exhibit 10.1 to the Form 8-K filed by the Issuer with the SEC on June 30, 2025 (and is incorporated by reference herein as Exhibit 10.3).

Registration Rights Agreement by and among the Issuer and the Sponsor

On June 26, 2025, in connection with the IPO, the Issuer, the Sponsor and other security holders entered into a registration rights agreement with the Issuer, pursuant to which the Sponsor was granted certain demand and "piggyback" registration rights, which will be subject to customary conditions and limitations.

The summary of such registration rights agreement contained herein is qualified in its entirety by reference to the full text of such agreement, a copy of which was filed by the Issuer as Exhibit 10.3 to the Form 8-K filed by the Issuer with the SEC on June 30, 2025 (and is incorporated by reference herein as Exhibit 10.4).

### 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.

**Reporting Person:** Yorkville Acquisition Sponsor LLC

**Signature:** /s/ Leslie Brault

**Name/Title:** Leslie Brault, Attorney-in-fact

**Date:** 07/03/2025

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.

**Reporting Person:** YA II PN, Ltd.

**Signature:** /s/ David Gonzalez

**Name/Title:** David Gonzalez, General Counsel

**Date:** 07/03/2025

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.

**Reporting Person:** YA Global Investments II (U.S.), LP

**Signature:** /s/ David Gonzalez

**Name/Title:** David Gonzalez, General Counsel

**Date:** 07/03/2025

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.

**Reporting Person:** Yorkville Advisors Global, LP

**Signature:** /s/ David Gonzalez

**Name/Title:** David Gonzalez, General Counsel

**Date:** 07/03/2025

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.

**Reporting Person:** Yorkville Advisors Global II, LLC

**Signature:** /s/ David Gonzalez

**Name/Title:** David Gonzalez, General Counsel

**Date:** 07/03/2025

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.

**Reporting Person:** YAII GP, LP

**Signature:** /s/ David Gonzalez

**Name/Title:** David Gonzalez, General Counsel

**Date:** 07/03/2025

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.

**Reporting Person:** YAII GP II, LLC

**Signature:** /s/ David Gonzalez

**Name/Title:** David Gonzalez, General Counsel

**Date:** 07/03/2025

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.

**Reporting Person:** Mark Angelo

**Signature:** /s/ Leslie Brault

**Name/Title:** Leslie Brault, Attorney-in-fact

**Date:** 07/03/2025

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.

**Reporting Person:** SC-Sigma Global Partners, LP

**Signature:** /s/ David Gonzalez

**Name/Title:** David Gonzalez, General Counsel

**Date:** 07/03/2025