# EDGAR Filing Document

**Accession Number:** 0002020407
**File Stem:** 0000762152-26-000005
**Filing Date:** 2026-1
**Character Count:** 8619
**Document Hash:** 8f1716f79a5b371eaf18f91170b6e729
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000762152-26-000005.hdr.sgml**: 20260109

**ACCESSION NUMBER**: 0000762152-26-000005

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13G

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260109

**DATE AS OF CHANGE**: 20260109

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** HarbourVest Private Investments Fund
- **CENTRAL INDEX KEY:** 0002020407

**ORGANIZATION NAME:**
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-95016
- **FILM NUMBER:** 26522017

**BUSINESS ADDRESS:**
- **STREET 1:** C/O HARBOURVEST PARTNERS, LLC
- **STREET 2:** ONE LINCOLN STREET, SUITE 1700
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02111
- **BUSINESS PHONE:** 617-348-3707

**MAIL ADDRESS:**
- **STREET 1:** C/O HARBOURVEST PARTNERS, LLC
- **STREET 2:** ONE LINCOLN STREET, SUITE 1700
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02111
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** STATE OF MICHIGAN RETIREMENT SYSTEM
- **CENTRAL INDEX KEY:** 0000762152

**ORGANIZATION NAME:**
- **EIN:** 382836023
- **FISCAL YEAR END:** 0930

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

**BUSINESS ADDRESS:**
- **STREET 1:** MICHIGAN DEPT. OF TREASURY
- **STREET 2:** BUREAU OF INVESTMENTS PO BOX 30117
- **CITY:** LANSING
- **STATE:** MI
- **ZIP:** 48909
- **BUSINESS PHONE:** 517-335-5401

**MAIL ADDRESS:**
- **STREET 1:** 2501 COOLIDGE ROAD
- **STREET 2:** SUITE 400
- **CITY:** EAST LANSING
- **STATE:** MI
- **ZIP:** 48823

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** STATE TREASURER STATE OF MICHIGAN
- **DATE OF NAME CHANGE:** 19970408

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

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**Issuer:** HarbourVest Private Investments Fund

**Title of Class of Securities:** Class I Common Shares of Beneficial Interest

**CUSIP Number:** 41166N301

**Date of Event Which Requires Filing of this Statement:** 04/30/2025

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

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

- [ ] Rule 13d-1(c)

- [ ] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>STATE OF MICHIGAN RETIREMENT SYSTEM | Names of Reporting Persons<br>STATE OF MICHIGAN RETIREMENT SYSTEM |
|:---|:---|:---|:---|
| 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>MI | Citizenship or Place of Organization<br>MI |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>54666817.60 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>54666817.60 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>54666817.60 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>54666817.60 |
| 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>99.4% | Percent of Class Represented by Amount in Row (9)<br>99.4% |
| 12. | Type of Reporting Person (See Instructions)<br>EP | Type of Reporting Person (See Instructions)<br>EP |

**Comment for Type of Reporting Person:** This Schedule 13G relates to the following classes of securities: Class I common shares of beneficial interest (the "Class I Common Shares") with CUSIP No. 41166N301. Reporting Person's ownership of Class I Common Shares first resulted in beneficial ownership representing more than five percent of the outstanding Common Shares on April 1, 2025, at which date, Reporting Person may be deemed to have beneficially owned 44,668,242.43 Class I Common Shares representing 99.98 percent of the outstanding Class I Common Shares based on 45,127,436.7960 Class I Common Shares outstanding on such date. The information presenting in this Schedule 13G reflects ownership as of December 31, 2025.

---

**Item 1(a). Name of Issuer:**
HarbourVest Private Investments Fund

**Item 1(b). Address of Issuer's Principal Executive Offices:**
C/O HARBOURVEST PARTNERS, LLC, ONE LINCOLN STREET, SUITE 1700, BOSTON, MASSACHUSETTS, 02111

**Item 2(a). Name of Person Filing:**
State of Michigan Retirement System

**Item 2(b). Address of Principal Business Office:**
2501 Coolidge Road, Suite 400 East Lansing MI 48823

**Item 2(c). Citizenship:**
Michigan, USA

**Item 2(d). Title of Class of Securities:**
Class I Common Shares of Beneficial Interest

**Item 2(e). CUSIP Number:**
41166N301

**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) [x] 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:**

As of December 31, 2025 the Reporting Person may be deemed to have dispositive and voting power with respect to 54,666,817.60 Class I Common Shares

**(b) Percent of class:**

The Reporting Person may be deemed to beneficially own 99.44% of Class I Common Shares

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

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

See Item 4(a) above

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

See Item 4(a) above

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

See Item 4(a) above

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

See Item 4(a) above

**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:**

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and 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.

### 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.

**STATE OF MICHIGAN RETIREMENT SYSTEM**

**Date:** 01/09/2026

**By:** Jeannette J. Brya

**Name & Title:** Chief Compliance Officer