# EDGAR Filing Document

**Accession Number:** 0001691428
**File Stem:** 0001193125-23-029989
**Filing Date:** 2023-2
**Character Count:** 15970
**Document Hash:** 26577e19469a969f28fa178f351c902c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-029989.hdr.sgml**: 20230209

**ACCESSION NUMBER**: 0001193125-23-029989

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

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230209

**DATE AS OF CHANGE**: 20230209

**GROUP MEMBERS**: ANSBERT GADICKE

**GROUP MEMBERS**: BIOIMPACT CAPITAL LLC

**GROUP MEMBERS**: ONCOLOGY IMPACT FUND (CAYMAN) MANAGEMENT L.P.

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MEI Pharma, Inc.
- **CENTRAL INDEX KEY:** 0001262104
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 510407811
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-79594
- **FILM NUMBER:** 23606166

**BUSINESS ADDRESS:**
- **STREET 1:** 11455 EL CAMINO REAL
- **STREET 2:** SUITE 250
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92130
- **BUSINESS PHONE:** 858-369-7100

**MAIL ADDRESS:**
- **STREET 1:** 11455 EL CAMINO REAL
- **STREET 2:** SUITE 250
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92130

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MARSHALL EDWARDS INC
- **DATE OF NAME CHANGE:** 20030902
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** UBS Oncology Impact Fund L.P.
- **CENTRAL INDEX KEY:** 0001691428
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

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

**BUSINESS ADDRESS:**
- **STREET 1:** 450 KENDALL STREET
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02142
- **BUSINESS PHONE:** 617-425-9200

**MAIL ADDRESS:**
- **STREET 1:** 450 KENDALL STREET
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02142

------

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**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**WASHINGTON, D.C. 20549** 

------

**SCHEDULE 13G** 

**UNDER THE SECURITIES EXCHANGE ACT OF 1934** 

**(Amendment No. 2)\*** 

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## MEI Pharma, Inc.
**(Name of Issuer)** 

**Common Stock, par value $0.00000002** 

**(Title of Class of Securities)** 

**55279B202** 

**(CUSIP Number)** 

**December 31, 2022** 

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

------

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

☐ Rule 13d-1(b)

☒ Rule 13d-1(c)

☐ Rule 13d-1(d)

\* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

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Page 1 of 10

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**CUSIP No.** 55279B202

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; UBS Oncology Impact Fund L.P.

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC USE ONLY

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; Cayman
Islands

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 0

10. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (9) Excludes Certain Shares (See Instructions)

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 0.0%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; PN

Page 2 of 10

------

**CUSIP No.** 55279B202

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Oncology Impact Fund (Cayman) Management L.P.

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC USE ONLY

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; Cayman
Islands

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 0

10. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (9) Excludes Certain Shares (See Instructions)

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 0.0%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; PN

Page 3 of 10

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**CUSIP No.** 55279B202

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; BioImpact Capital LLC

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC USE ONLY

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; Delaware

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 0

10. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (9) Excludes Certain Shares (See Instructions)

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 0.0%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; PN

Page 4 of 10

------

**CUSIP No.** 55279B202

1. &nbsp;&nbsp;&nbsp;&nbsp; Name of Reporting Persons &nbsp;&nbsp;&nbsp;&nbsp; Ansbert Gadicke

2. &nbsp;&nbsp;&nbsp;&nbsp; Check the Appropriate Box
if a Member of a Group (See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; (a) ☐ (b) ☒

3. &nbsp;&nbsp;&nbsp;&nbsp; SEC USE ONLY

4. &nbsp;&nbsp;&nbsp;&nbsp; Citizenship or Place of
Organization &nbsp;&nbsp;&nbsp;&nbsp; Delaware

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 5. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 6. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Voting Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 7. | &nbsp;&nbsp;&nbsp;&nbsp;Sole Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; Number of<br> Shares<br> Beneficially <br> Owned by<br> Each<br> Reporting<br> Person<br> With: | 8. | &nbsp;&nbsp;&nbsp;&nbsp;Shared Dispositive Power<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |

---

9. &nbsp;&nbsp;&nbsp;&nbsp; Aggregate Amount Beneficially Owned by Each Reporting Person &nbsp;&nbsp;&nbsp;&nbsp; 0

10. &nbsp;&nbsp;&nbsp;&nbsp; Check if the Aggregate
Amount in Row (9) Excludes Certain Shares (See Instructions)

11. &nbsp;&nbsp;&nbsp;&nbsp; Percent of Class
Represented by Amount in Row (9) &nbsp;&nbsp;&nbsp;&nbsp; 0.0%

12. &nbsp;&nbsp;&nbsp;&nbsp; Type of Reporting Person
(See Instructions) &nbsp;&nbsp;&nbsp;&nbsp; OO

Page 5 of 10

------

**Item 1.**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Name of Issuer

MEI Pharma, Inc.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Address of Issuer's Principal Executive Offices

11455 El Camino Real

San Diego, CA 92130

**Item 2.**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Name of Person Filing

UBS Oncology Impact Fund L.P. ("UBS Oncology")

Oncology Impact Fund (Cayman) Management LP ("Oncology Cayman")

BioImpact Capital LLC ("BioImpact")

Ansbert Gadicke

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) The address of the principal place of business for each of the Filing Persons is c/o MPM Capital LLC, 399
Boylston Street, Boston, MA 02116, other than UBS Oncology and Oncology Cayman, whose address is 1st Floor, 2 Hill Street, St Helier, Jersey, JE1 4FS.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Citizenship

UBS Oncology and Oncology Cayman are organized in the Cayman Islands and BioImpact is organized in Delaware. Mr. Gadicke is a United States citizen.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) Title of Class of Securities

Common Stock, par value $0.00000002 per share ("Common Stock")

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) CUSIP Number

55279B202

**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:** <br>

Not applicable

Page 6 of 10

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**Item 4.** **Ownership** <br>

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **UBS Entity** | **Shares<br>Held<br>Directly** | **Sole**<br>**Voting**<br>**Power** | **Shared**<br>**Voting**<br>**Power** | **Sole**<br>**Dispositive<br>Power** | **Shared<br>Dispositive<br>Power** | **Beneficial<br>Ownership** | **Percentage**<br>**of Class** |
|  UBS Oncology | 0 | 0 | 0 | 0 | 0 | 0 | 0.0% |
|  Oncology Cayman | 0 | 0 | 0 | 0 | 0 | 0 | 0.0% |
|  BioImpact | 0 | 0 | 0 | 0 | 0 | 0 | 0.0% |
|  Ansbert Gadicke | 0 | 0 | 0 | 0 | 0 | 0 | 0.0% |

---

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

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 Five Percent on Behalf of Another Person** <br>

Not Applicable

**Item 7.** **Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.** <br>

Not Applicable

**Item 8.** **Identification and Classification of Members of the Group** <br>

Not Applicable

**Item 9.** **Notice of Dissolution of a Group** <br>

Not Applicable

**Item 10.** **Certification** <br>

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under

§ 240.14a-11.

Page 7 of 10

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**<u>SIGNATURE</u>**

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.

Dated: February 8, 2023

---

| | |
|:---|:---|
| **UBS ONCOLOGY IMPACT FUND, L.P.** | **UBS ONCOLOGY IMPACT FUND, L.P.** |
| By: | Oncology Impact Fund (Cayman) Management L.P., |
|  | its General Partner |
| By: | BioImpact Capital LLC, |
|  | Its General Partner |
| By: | /s/ Ansbert Gadicke |
| Name: | Ansbert Gadicke |
| Title: | Managing Partner |
| **ONCOLOGY IMPACT FUND (CAYMAN) MANAGEMENT L.P.** | **ONCOLOGY IMPACT FUND (CAYMAN) MANAGEMENT L.P.** |
| By: | BioImpact Capital LLC, |
|  | Its General Partner |
| By: | /s/ Ansbert Gadicke |
| Name: | Ansbert Gadicke |
| Title: | Managing Partner |
| **BIOIMPACT CAPITAL LLC** | **BIOIMPACT CAPITAL LLC** |
| By: | /s/ Ansbert Gadicke |
| Name: | Ansbert Gadicke |
| Title: | Managing Partner |
| By: | /s/ Ansbert Gadicke |
| Name: | Ansbert Gadicke |

---

Page 8 of 10

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**Exhibits** 

A Joint Filing Agreement

Page 9 of 10

## Ex-99.A

<u>EXHIBIT A</u> 

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 13G (including amendments thereto) with respect to the Common Stock of MEI Pharma, Inc. and further agree that this agreement be included as an exhibit to such filing. Each party to the agreement expressly authorizes each other party to file on its behalf any and all amendments to such statement. Each party to this agreement agrees that this joint filing agreement may be signed in counterparts.

In evidence whereof, the undersigned have caused this Agreement to be executed on their behalf this 8<sup>th</sup> day of February, 2023.

---

| | |
|:---|:---|
| **UBS ONCOLOGY IMPACT FUND, L.P.** | **UBS ONCOLOGY IMPACT FUND, L.P.** |
| By: | Oncology Impact Fund (Cayman) Management L.P., |
|  | its General Partner |
| By: | BioImpact Capital LLC, |
|  | Its General Partner |
| By: | /s/ Ansbert Gadicke |
| Name: | Ansbert Gadicke |
| Title: | Managing Partner |
| **ONCOLOGY IMPACT FUND (CAYMAN) MANAGEMENT L.P.** | **ONCOLOGY IMPACT FUND (CAYMAN) MANAGEMENT L.P.** |
| By: | BioImpact Capital LLC, |
|  | Its General Partner |
| By: | /s/ Ansbert Gadicke |
| Name: | Ansbert Gadicke |
| Title: | Managing Partner |
| **BIOIMPACT CAPITAL LLC** | **BIOIMPACT CAPITAL LLC** |
| By: | /s/ Ansbert Gadicke |
| Name: | Ansbert Gadicke |
| Title: | Managing Partner |
| By: | /s/ Ansbert Gadicke |
| Name: | Ansbert Gadicke |

---

Page 10 of 10