# EDGAR Filing Document

**Accession Number:** 0001761499
**File Stem:** 0001193125-26-226627
**Filing Date:** 2026-5
**Character Count:** 14729
**Document Hash:** 42d7d8a323d1ee483353684d23aefcee
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-226627.hdr.sgml**: 20260515

**ACCESSION NUMBER**: 0001193125-26-226627

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13G/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260515

**DATE AS OF CHANGE**: 20260515

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MSD Investment Corp.
- **CENTRAL INDEX KEY:** 0001849894

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

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-94204
- **FILM NUMBER:** 26986930

**BUSINESS ADDRESS:**
- **STREET 1:** 550 MADISON AVE, 20TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022
- **BUSINESS PHONE:** 212.303.4758

**MAIL ADDRESS:**
- **STREET 1:** 550 MADISON AVE, 20TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MSD Investment, LLC
- **DATE OF NAME CHANGE:** 20211117

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MSD Investment Corp., LLC
- **DATE OF NAME CHANGE:** 20210308
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Susan Lieberman Dell Separate Property Trust
- **CENTRAL INDEX KEY:** 0001761499

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

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A

**BUSINESS ADDRESS:**
- **STREET 1:** C/O HEXAGON TRUST COMPANY
- **STREET 2:** ONE LIBERTY LANE EAST
- **CITY:** HAMPTON
- **STATE:** NH
- **ZIP:** 03842
- **BUSINESS PHONE:** 603-929-2660

**MAIL ADDRESS:**
- **STREET 1:** C/O HEXAGON TRUST COMPANY
- **STREET 2:** ONE LIBERTY LANE EAST
- **CITY:** HAMPTON
- **STATE:** NH
- **ZIP:** 03842

### Attached PDF Documents

**Attachment 1:** `ck0000000000-ex99_1.pdf`

_No text found in this document._

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

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**(Amendment No. 3)**

**Issuer:** MSD Investment Corp.

**Title of Class of Securities:** Common Stock, Par Value $0.001 per share

**CUSIP Number:** —

**Date of Event Which Requires Filing of this Statement:** 03/31/2026

**Check the appropriate box to designate the rule pursuant to which this Schedule is filed:**

- [ ] Rule 13d-1(b)

- [ ] Rule 13d-1(c)

- [x] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>Susan Lieberman Dell Separate Property Trust | Names of Reporting Persons<br>Susan Lieberman Dell Separate Property Trust |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>TX | Citizenship or Place of Organization<br>TX |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>7964498.47 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>7964498.47 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>7964498.47 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>7964498.47 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>5.7% | Percent of Class Represented by Amount in Row (9)<br>5.7% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>Susan Lieberman Dell | Names of Reporting Persons<br>Susan Lieberman Dell |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>X1 | Citizenship or Place of Organization<br>X1 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>7964498.47 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>7964498.47 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>7964498.47 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>7964498.47 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>5.7% | Percent of Class Represented by Amount in Row (9)<br>5.7% |
| 12. | Type of Reporting Person (See Instructions)<br>IN | Type of Reporting Person (See Instructions)<br>IN |

---

| 1. | Names of Reporting Persons<br>Hexagon Trust Company | Names of Reporting Persons<br>Hexagon Trust Company |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>NH | Citizenship or Place of Organization<br>NH |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>7964498.47 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>7964498.47 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>7964498.47 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>7964498.47 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>5.7% | Percent of Class Represented by Amount in Row (9)<br>5.7% |
| 12. | Type of Reporting Person (See Instructions)<br>CO | Type of Reporting Person (See Instructions)<br>CO |

---

| 1. | Names of Reporting Persons<br>Marc R. Lisker | Names of Reporting Persons<br>Marc R. Lisker |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>X1 | Citizenship or Place of Organization<br>X1 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>7964498.47 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>7964498.47 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>7964498.47 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>7964498.47 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>5.7% | Percent of Class Represented by Amount in Row (9)<br>5.7% |
| 12. | Type of Reporting Person (See Instructions)<br>IN | Type of Reporting Person (See Instructions)<br>IN |

---

**Item 1(a). Name of Issuer:**
MSD Investment Corp.

**Item 1(b). Address of Issuer's Principal Executive Offices:**
The issuer's principal executive office is located at 550 Madison Avenue, 20th Floor, New York, New York, 10022.

**Item 2(a). Name of Person Filing:**
This Amendment No. 3 to Schedule 13G ("Amendment No. 3") is being jointly filed by and on behalf of each of Susan Lieberman Dell Separate Property Trust (the "Trust"), Susan Lieberman Dell, Hexagon Trust Company (the "Trustee") and Marc R. Lisker (collectively, the "Reporting Persons").

The Trust is the direct owner of the securities covered in this Amendment No. 3. Mrs. Dell is the beneficiary of, and may be deemed to beneficially own securities beneficially owned by, the Trust. The Trustee is the trustee of, and may be deemed to beneficially own securities beneficially owned by, the Trust. Mr. Lisker is the President of, and may be deemed to beneficially own the securities beneficially owned by, the Trustee. Each of the Trustee and Mr. Lisker disclaims any pecuniary interest in the assets of, or any securities beneficially owned by, the Trust.

The Reporting Persons have entered into a Joint Filing Agreement, dated May 15, 2026, a copy of which is filed with this Amendment No. 3 as Exhibit 99.1, pursuant to which the Reporting Persons have agreed to file this statement jointly in accordance with the provisions of Rule 13d-1(k)(1) under the Act.

**Item 2(b). Address of Principal Business Office:**
The address of the principal business office of each of the Trust and the Trustee is 60 Penhallow Street, Suite 400, Portsmouth, New Hampshire 03801.

The address of the principal business office of each of Mrs. Dell and Mr. Lisker is 550 Madison Avenue, 20th Floor, New York, New York, 10022.

**Item 2(c). Citizenship:**
The Trust is organized under the laws of the State of Texas. The Trustee is incorporated under the laws of the State of New Hampshire. Each of Mrs. Dell and Mr. Lisker is a United States citizen.

**Item 2(d). Title of Class of Securities:**
Common Stock, Par Value $0.001 per share

**Item 2(e). CUSIP Number:**
—

**Item 3. If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:**

(a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d) [ ] Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e) [ ] An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f) [ ] An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g) [ ] A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h) [ ] A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j) [ ] A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), if filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:

(k) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

**Item 4. Ownership:**

**(a) Amount beneficially owned:**

Trust - 7,964,498.47
Susan Lieberman Dell - 7,964,498.47
Trustee - 7,964,498.47
Marc R. Lisker - 7,964,498.47

**(b) Percent of class:**

The percentages provided herein are calculated based on 138,831,332 shares of the issuer's common stock outstanding as of May 13, 2026, as reported in the issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 14, 2026.
Trust - 5.7%
Susan Lieberman Dell - 5.7%
Trustee - 5.7%
Marc R. Lisker - 5.7%

**(c) Number of shares as to which the person has:**

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

Trust - 0
Susan Lieberman Dell - 0
Trustee - 0
Marc R. Lisker - 0

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

Trust - 7,964,498.47
Susan Lieberman Dell - 7,964,498.47
Trustee - 7,964,498.47
Marc R. Lisker - 7,964,498.47

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

Trust - 0
Susan Lieberman Dell - 0
Trustee - 0
Marc R. Lisker - 0

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

Trust - 7,964,498.47
Susan Lieberman Dell - 7,964,498.47
Trustee - 7,964,498.47
Marc R. Lisker - 7,964,498.47

**Item 5. Ownership of Five Percent or Less of a Class.**

[x] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

Not Applicable

**Item 7. Identification and Classification of the Subsidiary**

Not Applicable

**Item 8. Identification and Classification of Members of the Group**

Not Applicable

**Item 9. Notice of Dissolution of Group**

Not Applicable

**Item 10. Certification:**

—

### 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.

**Susan Lieberman Dell Separate Property Trust**

**Date:** 05/15/2026

**By:** /s/ Marc R. Lisker

**Name & Title:** Marc R. Lisker/President of Hexagon Trust Company, its Trustee

**Susan Lieberman Dell**

**Date:** 05/15/2026

**By:** /s/ Marc R. Lisker

**Name & Title:** Marc R. Lisker/Attorney-in-Fact

**Hexagon Trust Company**

**Date:** 05/15/2026

**By:** /s/ Marc R. Lisker

**Name & Title:** Marc R. Lisker/President

**Marc R. Lisker**

**Date:** 05/15/2026

**By:** /s/ Marc R. Lisker

**Name & Title:** Marc R. Lisker