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

	SCHEDULE 13D

Under the Securities Exchange Act of 1934
(Amendment No. )*

NMF SLF I, INC.

(Name of Issuer)

Common Stock, $0.001 par value per share

(Title of Class of Securities)

None

(CUSIP Number)

Mary Beth Kuderik

Chief Financial Officer

UAW Retiree Medical Benefits Trust

200 Walker Street

Detroit, MI 48207

(313) 324-5900

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

February 18, 2020

(Date of Event Which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. o

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

* 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 disclosures provided in a prior cover page.

The information required on 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).

CUSIP No. None						13D

	1.	Names of Reporting Persons I.R.S. Identification Nos. of Above Persons (Entities Only) UAW Retiree Medical Benefits Trust

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			x
		(b)			o

	3.	SEC Use Only

	4.	Source of Funds (See Instructions) WC

	5.	Check Box if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) o

	6.	Citizenship or Place of Organization None. Organized as a 501(c)(9) Voluntary Employee Beneficiary Association.

Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power 0

			8.	Shared Voting Power 5,000,000

			9.	Sole Dispositive Power 0

			10.	Shared Dispositive Power 5,000,000

	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 5,000,000

	12.	Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) o

	13.	Percent of Class Represented by Amount in Row (11) 95.2%

	14.	Type of Reporting Person (See Instructions) EP

CUSIP No. None						13D

	1.	Names of Reporting Persons I.R.S. Identification Nos. of Above Persons (Entities Only) UAW Chrysler Retirees Medical Benefits Plan

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			x
		(b)			o

	3.	SEC Use Only

	4.	Source of Funds (See Instructions) WC

	5.	Check Box if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) o

	6.	Citizenship or Place of Organization None. Organized as a 501(c)(9) Voluntary Employee Beneficiary Association.

Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power 0

			8.	Shared Voting Power 1,040,000

			9.	Sole Dispositive Power 0

			10.	Shared Dispositive Power 1,040,000

	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 1,040,000

	12.	Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) o

	13.	Percent of Class Represented by Amount in Row (11) 19.8%

	14.	Type of Reporting Person (See Instructions) EP

CUSIP No. None						13D

	1.	Names of Reporting Persons I.R.S. Identification Nos. of Above Persons (Entities Only) UAW Ford Retirees Medical Benefits Plan

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			x
		(b)			o

	3.	SEC Use Only

	4.	Source of Funds (See Instructions) WC

	5.	Check Box if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) o

	6.	Citizenship or Place of Organization None. Organized as a 501(c)(9) Voluntary Employee Beneficiary Association.

Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power 0

			8.	Shared Voting Power 1,630,000

			9.	Sole Dispositive Power 0

			10.	Shared Dispositive Power 1,630,000

	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 1,630,000

	12.	Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) o

	13.	Percent of Class Represented by Amount in Row (11) 31.0%

	14.	Type of Reporting Person (See Instructions) EP

CUSIP No. None						13D

	1.	Names of Reporting Persons I.R.S. Identification Nos. of Above Persons (Entities Only) UAW GM Retirees Medical Benefits Plan

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			x
		(b)			o

	3.	SEC Use Only

	4.	Source of Funds (See Instructions) WC

	5.	Check Box if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) o

	6.	Citizenship or Place of Organization None. Organized as a 501(c)(9) Voluntary Employee Beneficiary Association.

Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power 0

			8.	Shared Voting Power 2,330,000

			9.	Sole Dispositive Power 0

			10.	Shared Dispositive Power 2,330,000

	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 2,330,000

	12.	Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) o

	13.	Percent of Class Represented by Amount in Row (11) 44.4%

	14.	Type of Reporting Person (See Instructions) EP

CUSIP No. None						13D

	1.	Names of Reporting Persons I.R.S. Identification Nos. of Above Persons (Entities Only) Hershel Harper

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			x
		(b)			o

	3.	SEC Use Only

	4.	Source of Funds (See Instructions) AF

	5.	Check Box if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) o

	6.	Citizenship or Place of Organization United States

Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power 0

			8.	Shared Voting Power 5,000,000

			9.	Sole Dispositive Power 0

			10.	Shared Dispositive Power 5,000,000

	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 5,000,000

	12.	Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) o

	13.	Percent of Class Represented by Amount in Row (11) 95.2%

	14.	Type of Reporting Person (See Instructions) IN

CUSIP No. None

13D

Item 1. Security and Issuer.

This Schedule 13D relates to shares of common stock (the “Shares”) of NMF SLF I, Inc., a Maryland business development company (the “Issuer”). The Issuer’s principal executive offices are located at 787 Seventh Avenue, 48th Floor, New York, NY 10019.

Item 2. Identity and Background.

(a) The persons filing this Schedule 13D are: (i) UAW Retiree Medical Benefits Trust, organized as a 501(c)(9) Voluntary Employee Beneficiary Association (“UAW RMBT”); (ii) UAW Chrysler Retirees Medical Benefits Plan, as established and maintained by the UAW Chrysler Retirees Employees’ Beneficiary Association, an employee organization within the meaning of Section 3(4) of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”) under the UAW RMBT (the “UAW Chrysler Retirees Medical Benefits Plan”); (iii) UAW Ford Retirees Medical Benefits Plan, as established and maintained by the UAW Ford Retirees Employees’ Beneficiary Association, an employee organization within the meaning of Section 3(4) of ERISA under the UAW RMBT (the “UAW Ford Retirees Medical Benefits Plan”); (iv) UAW GM Retirees Medical Benefits Plan, as established and maintained by the UAW GM Retirees Employees’ Beneficiary Association, an employee organization within the meaning of Section 3(4) of ERISA under the UAW RMBT (the “UAW GM Retirees Medical Benefits Plan” and together with the UAW Chrysler Retirees Medical Benefits Plan and the UAW Ford Retirees Medical Benefits Plan, the “Plans”); and (v) Hershel Harper, a United States citizen (collectively, the “Reporting Persons”).

(b) The principal business address of the Reporting Persons is 200 Walker Street, Detroit, MI 48207.

(c) Each of the Plans is an employee welfare benefit plan established under the UAW RMBT. Hershel Harper is the Chief Investment Officer of the UAW RMBT.

(d) During the last five years, none of the Reporting Persons have been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e) During the last five years, none of the Reporting Persons have been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgement, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

(f) See Item 2(a) above for the citizenship or place of organization of each of the Reporting Persons.

Item 3. Source and Amount of Funds or Other Consideration.

The Reporting Persons used a total of approximately $50,000,000 to acquire the Shares reported in this Schedule 13D. The source of the funds used to acquire the Shares reported herein is the investment capital of the Plans.

Item 4. Purpose of Transaction.

On January 27, 2020, each Plan entered into a subscription agreement with the Issuer (the “Subscription Agreements”) pursuant to which the UAW Chrysler Retirees Medical Benefits Plan agreed to purchase Shares for an aggregate purchase price equal to $104,000,000, the UAW Ford Retirees Medical Benefits Plan agreed to purchase Shares for an aggregate purchase price equal to $163,000,000, and the UAW GM Retirees Medical Benefits Plan agreed to purchase Shares for an aggregate purchase price equal to $233,000,000. Such amounts are payable at such times and in such amounts as required by the Issuer, under the terms and conditions set forth in the Subscription Agreements.

On February 3, 2020, pursuant to drawdown notices delivered in accordance with the Subscription Agreements: (i) UAW Chrysler Retirees Medical Benefits Plan purchased from the Issuer, and the Issuer issued to UAW Chrysler Retirees Medical Benefits Plan, 1,040,000 Shares; (ii) UAW Ford Retirees Medical Benefits Plan purchased from the Issuer, and the Issuer issued to UAW Ford Retirees Medical Benefits Plan, 1,630,000 Shares; and (iii) UAW GM Retirees Medical Benefits Plan purchased from the Issuer, and the Issuer issued to UAW GM Retirees Medical Benefits Plan, 2,330,000 Shares.

The purpose of the transaction was to acquire securities of the Issuer for investment purposes.

The Issuer is a business development company. The Reporting Persons expect to continue to beneficially own, in the aggregate, greater than 95% of the Shares outstanding. The investment strategy and investment policy of the Issuer have been devised by, and will be implemented by, New Mountain Finance Advisers BDC, L.L.C. The Reporting Persons do not have any plans or proposals to make any changes to the Issuer’s investment policy.

The Reporting Persons may change their intention with respect to any and all matters referred to in this Item 4.

Except as set forth herein, the Reporting Persons have no present plan or proposal that would relate to or result in any of the matters set forth in subparagraphs (a)-(j) of Item 4 of Schedule 13D.

Item 5. Interest in Securities of the Issuer.

(a) The aggregate number of Shares to which this Schedule 13D relates is 5,000,000. Such aggregate number of Shares represents 95.2% of the common stock of the Issuer. The percentage reported in this Schedule 13D is calculated based upon 5,249,900 Shares stated to be outstanding as of February 3, 2020 pursuant to drawdown notices delivered in accordance with the Subscription Agreements.

(b) The UAW Chrysler Retirees Medical Benefits Plan beneficially owns and has shared voting and dispositive power of 1,040,000 Shares. Such Shares represent 19.8% of the Shares outstanding.

The UAW Ford Retirees Medical Benefits Plan beneficially owns and has shared voting and dispositive power of 1,630,000 Shares. Such Shares represent 31.0% of the Shares outstanding.

The UAW GM Retirees Medical Benefits Plan beneficially owns and has shared voting and dispositive power of 2,330,000 Shares. Such Shares represent 44.4% of the Shares outstanding.

UAW RMBT is the trust under which the Plans are established and, pursuant to Rule 13d-3, may be deemed to beneficially own the 5,000,000 Shares held by the Plans. Such Shares represent 95.2% of the Shares outstanding. UAW RMBT is an indirect beneficial owner of these Shares.

Hershel Harper is the chief investment officer of UAW RMBT, the trust under which the Plans are established, and, pursuant to Rule 13d-3 may be deemed to beneficially own the 5,000,000 Shares held by the Plans. Such Shares represent 95.2% of the Shares outstanding. Hershel Harper is an indirect beneficial owner of these Shares.

(c) Except as disclosed in Item 4, no transactions in the Shares were effected during the past sixty days by the Reporting Persons.

(d) Not applicable.

(e) Not applicable.

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

On January 27, 2020, each Plan entered into a Subscription Agreement with the Issuer. For more information about the Subscription Agreements and the terms thereof, please refer to Item 4 above and Exhibit 7.1 hereto.

Pursuant to Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the Reporting Persons have entered into a Joint Filing Agreement with respect to the joint filing of this statement and any amendments hereto, a copy of which is filed as Exhibit 99.5 hereto.

The foregoing description is qualified in its entirety by reference to the full texts of the referenced agreements, which are filed as exhibits to this Schedule 13D.

Item 7. Material to be Filed as Exhibits.

Exhibit 7.1 Subscription Agreement (incorporated by reference to Exhibit No. 4.1 to the Issuer’s Amendment No. 1 to Form 10 filed with the SEC on January 15, 2020).

Exhibit 99.5 Joint Filing Agreement by and among the Reporting Persons dated February 20, 2020.

CUSIP No. None

13D

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.

Dated: February 20, 2020

	UAW RETIREE MEDICAL BENEFITS TRUST

	By:	/s/ Mary Beth Kuderik
	Name: Mary Beth Kuderik
	Title: Chief Financial Officer


	UAW CHRYSLER RETIREES MEDICAL BENEFITS PLAN

	By:	/s/ Mary Beth Kuderik
	Name: Mary Beth Kuderik
	Title: Chief Financial Officer


	UAW FORD RETIREES MEDICAL BENEFITS PLAN

	By:	/s/ Mary Beth Kuderik
	Name: Mary Beth Kuderik
	Title: Chief Financial Officer


	UAW GM RETIREES MEDICAL BENEFITS PLAN

	By:	/s/ Mary Beth Kuderik
	Name: Mary Beth Kuderik
	Title: Chief Financial Officer


	HERSHEL HARPER

	/s/ Hershel Harper

Exhibit 7.1		Subscription Agreement (incorporated by reference to Exhibit No. 4.1 to the Issuer’s Amendment No. 1 to Form 10 filed with the SEC on January 15, 2020).

Exhibit 99.5		Joint Filing Agreement by and among the Reporting Persons dated February 20, 2020.