Exempt Offering Notice · D/A

ISQ Open Infrastructure Co LLC

Exempt Offering Notice

Filed Sep 18, 2026Accepted Sep 18, 2026, 9:35 AM EDTFiling CIK 2059924Accession 0002059924-26-000001

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Amendment · This filing reports the amendment as submitted.

Issuer

Name: ISQ Open Infrastructure Co LLC
CIK: 0002059924
Entity type: Limited Liability Company
Jurisdiction: DELAWARE
Phone: 786-693-5739
Street: 600 BRICKELL AVENUE
City: MIAMI
State / country code: FL
State / country: FLORIDA
Postal code: 33131
Year incorporated: 2025
Incorporated within five years: true
Previous issuer names: None
Previous EDGAR names: None

Related person 1

First name: n/a
Last name: ISQ OpenInfra Registered Advisor LLC
Relationships: Promoter
Relationship clarification: Manager of the Issuer
Street: 600 Brickell Avenue
City: Miami
State / country code: FL
State / country: FLORIDA
Postal code: 33131

Related person 2

First name: Walid
Last name: Chammah
Relationships: Executive Officer · Director
Relationship clarification: [blank]
Street: 600 Brickell Avenue
City: Miami
State / country code: FL
State / country: FLORIDA
Postal code: 33131

Related person 3

First name: Brian
Last name: Collett
Relationships: Executive Officer · Director
Relationship clarification: [blank]
Street: 600 Brickell Avenue
City: Miami
State / country code: FL
State / country: FLORIDA
Postal code: 33131

Related person 4

First name: Irina
Last name: Zilbergleyt
Relationships: Director
Relationship clarification: [blank]
Street: 600 Brickell Avenue
City: Miami
State / country code: FL
State / country: FLORIDA
Postal code: 33131

Related person 5

First name: Terrence
Last name: Olson
Relationships: Director
Relationship clarification: [blank]
Street: 600 Brickell Avenue
City: Miami
State / country code: FL
State / country: FLORIDA
Postal code: 33131

Related person 6

First name: William
Last name: Lee
Relationships: Director
Relationship clarification: [blank]
Street: 600 Brickell Avenue
City: Miami
State / country code: FL
State / country: FLORIDA
Postal code: 33131

Related person 7

First name: Dominic
Last name: Spiri
Relationships: Executive Officer
Relationship clarification: [blank]
Street: 600 Brickell Avenue
City: Miami
State / country code: FL
State / country: FLORIDA
Postal code: 33131

Related person 8

First name: Starr
Last name: Frohlich
Relationships: Executive Officer
Relationship clarification: [blank]
Street: 600 Brickell Avenue
City: Miami
State / country code: FL
State / country: FLORIDA
Postal code: 33131

Related person 9

First name: Jacob
Last name: Moussa
Relationships: Executive Officer
Relationship clarification: [blank]
Street: 600 Brickell Avenue
City: Miami
State / country code: FL
State / country: FLORIDA
Postal code: 33131

Related person 10

First name: Trisha
Last name: Miller
Relationships: Director
Relationship clarification: [blank]
Street: 600 Brickell Avenue
City: Miami
State / country code: FL
State / country: FLORIDA
Postal code: 33131

Offering

Industry: Other
Revenue range: Decline to Disclose
Exemption codes: 06b
Amendment: true
Previous accession: 0002059924-25-000005
First sale date: 2025-09-02
Offering lasts more than one year: true
Equity securities: true
Debt securities: true
Business combination: false
Business combination clarification: [blank]
Minimum investment accepted: 0
Total offering amount: Indefinite
Amount sold: 339,311,744
Remaining amount: Indefinite
Amount clarification: [blank]
Non-accredited investors reported: false
Investors already participating: 1,384

Commissions, fees and proceeds

Sales commissions: 3,260,019
Sales commissions are estimated: true
Finders’ fees: 0
Commission / fee clarification: Reported commissions are estimated upfront payments made by investors directly to financial intermediaries.
Gross proceeds used: 0
Use of proceeds clarification: [blank]

Sales compensation recipient 1

Name: Morgan Stanley Smith Barney LLC
CRD: 149777
Associated broker-dealer: Morgan Stanley Smith Barney LLC
Broker-dealer CRD: 149777
Foreign solicitation: false
Street: 2000 Westchester Avenue
City: Purchase
State / country code: NY
State / country: NEW YORK
Postal code: 10577-2530
Solicitation jurisdictions: All States

Sales compensation recipient 2

Name: J.P. Morgan Securities LLC
CRD: 79
Associated broker-dealer: J.P. Morgan Securities LLC
Broker-dealer CRD: 79
Foreign solicitation: false
Street: 383 Madison Avenue
City: New York
State / country code: NY
State / country: NEW YORK
Postal code: 10179
Solicitation jurisdictions: All States

Sales compensation recipient 3

Name: Charles B. Harrison
CRD: 3071551
Associated broker-dealer: H&L Equities LLC
Broker-dealer CRD: 113794
Foreign solicitation: false
Street: 1175 Peachtree St., NE
Street (continued): Suite 2200
City: Atlanta
State / country code: GA
State / country: GEORGIA
Postal code: 30361-6206
States of solicitation: FL · GA · TX
Solicitation description: FLORIDA · GEORGIA · TEXAS

Sales compensation recipient 4

Name: Scott Harrison
CRD: 4981070
Associated broker-dealer: H&L Equities LLC
Broker-dealer CRD: 113794
Foreign solicitation: false
Street: 1175 Peachtree St., NE
Street (continued): Suite 2200
City: Atlanta
State / country code: GA
State / country: GEORGIA
Postal code: 30361-6206
States of solicitation: FL · GA · TX
Solicitation description: FLORIDA · GEORGIA · TEXAS

Sales compensation recipient 5

Name: Patrick J. Whelchel
CRD: 5389090
Associated broker-dealer: H&L Equities LLC
Broker-dealer CRD: 113794
Foreign solicitation: false
Street: 1175 Peachtree St., NE
Street (continued): Suite 2200
City: Atlanta
State / country code: GA
State / country: GEORGIA
Postal code: 30361-6206
States of solicitation: FL · GA · TX
Solicitation description: FLORIDA · GEORGIA · TEXAS

Sales compensation recipient 6

Name: Lori Mayfield
CRD: 4899271
Associated broker-dealer: H&L Equities LLC
Broker-dealer CRD: 113794
Foreign solicitation: false
Street: 1175 Peachtree St., NE
Street (continued): Suite 2200
City: Atlanta
State / country code: GA
State / country: GEORGIA
Postal code: 30361-6206
States of solicitation: FL · GA · TX
Solicitation description: FLORIDA · GEORGIA · TEXAS

Sales compensation recipient 7

Name: Privacore Capital, LLC
CRD: 330893
Associated broker-dealer: Janus Henderson Distributors US LLC
Broker-dealer CRD: 28832
Foreign solicitation: false
Street: 1411 Broadway Street
City: New York
State / country code: NY
State / country: NEW YORK
Postal code: 10018
Solicitation jurisdictions: All States

Signature authorization

Authorized representative: false

Signature 1

Issuer: ISQ Open Infrastructure Co LLC
Signer: Jacob Moussa
Signed: Jacob Moussa
Title: Chief Operating Officer
Date: 2026-09-18

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