# EDGAR Filing Document

**Accession Number:** 0001976685
**File Stem:** 0002004328-26-000002
**Filing Date:** 2026-1
**Character Count:** 2130
**Document Hash:** 8e5f4e5a1d2c8b6742d2d429011878e7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0002004328-26-000002.hdr.sgml**: 20260113

**ACCESSION NUMBER**: 0002004328-26-000002

**CONFORMED SUBMISSION TYPE**: 424B3

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260113

**DATE AS OF CHANGE**: 20260113

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Institutional Investment Strategy Fund
- **CENTRAL INDEX KEY:** 0001976685

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** 424B3
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-271745
- **FILM NUMBER:** 26529376

**BUSINESS ADDRESS:**
- **STREET 1:** 2261 MARKET STREET
- **STREET 2:** #5190
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94114
- **BUSINESS PHONE:** 800-535-7096

**MAIL ADDRESS:**
- **STREET 1:** 2261 MARKET STREET
- **STREET 2:** #5190
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94114

**INSTITUTIONAL INVESTMENT STRATEGY FUND**

Investor Class Shares

Founder Class Shares

of Beneficial Interest

**Supplement dated January 13, 2026**

**to the Prospectus and SAI dated July 29, 2025**

___________________________________________________________________

Buena Capital Advisers, LLC, the investment adviser to the Institutional Investment Strategy Fund (the "Fund"), has changed its name to Ivy Invest Corporation as part of a tax status reclassification.

Effectively immediately, all references to "Buena Capital Advisers, LLC" in the Fund's Prospectus and Statement of Additional Information are replaced with "Ivy Invest" and all references to buenacapital.com are replaced with ivyinvest.co.

There has been no change of control of the adviser, and the adviser's address and the Fund's portfolio manager remain the same.

_________________________________

*This Supplement and the Prospectus and SAI provide relevant information for all shareholders and should be retained for future reference. These documents have been filed with the Securities and Exchange Commission, and the Fund's registration statement on Form N-2, dated July 29, 2025 and are incorporated herein by reference.*