Form D Raw Data - Electronic Filing Depository

EFDID: 569687EFD: Raw Data

Issuer: InvestX Series (ATR-U4), a Series of InvestX Master LLC (0002087392) - D

Accession: 0002087392-25-000001 () (EDGAR Files) (Form D)

Edgar Posted: Sep. 26, 2025
EFD Posted: Sep. 26, 2025

- < edgarSubmission >

< schemaVersion > X0708 </ schemaVersion >

< submissionType > D </ submissionType >

< testOrLive > LIVE </ testOrLive >

- < primaryIssuer >

< cik > 0002087392 </ cik >

< entityName > InvestX Series (ATR-U4), a Series of InvestX Master LLC </ entityName >

- < issuerAddress >

< street1 > 19 FULTON STREET </ street1 >

< street2 > SUITE 300 </ street2 >

< city > NEW YORK </ city >

< stateOrCountry > NY </ stateOrCountry >

< stateOrCountryDescription > NEW YORK </ stateOrCountryDescription >

< zipCode > 10038 </ zipCode >

</ issuerAddress >

< issuerPhoneNumber > 212-390-9270 </ issuerPhoneNumber >

< jurisdictionOfInc > DELAWARE </ jurisdictionOfInc >

- < issuerPreviousNameList >

< value > None </ value >

</ issuerPreviousNameList >

- < edgarPreviousNameList >

< value > None </ value >

</ edgarPreviousNameList >

< entityType > Limited Liability Company </ entityType >

- < yearOfInc >

< withinFiveYears > true </ withinFiveYears >

< value > 2025 </ value >

</ yearOfInc >

</ primaryIssuer >

- < relatedPersonsList >

- < relatedPersonInfo >

- < relatedPersonName >

< firstName > null </ firstName >

< lastName > InvestX Master GP1 Inc. </ lastName >

</ relatedPersonName >

- < relatedPersonAddress >

< street1 > 19 Fulton Street </ street1 >

< street2 > Suite 300 </ street2 >

< city > New York </ city >

< stateOrCountry > NY </ stateOrCountry >

< stateOrCountryDescription > NEW YORK </ stateOrCountryDescription >

< zipCode > 10038 </ zipCode >

</ relatedPersonAddress >

- < relatedPersonRelationshipList >

< relationship > Director </ relationship >

</ relatedPersonRelationshipList >

< relationshipClarification > Manager of the Issuer </ relationshipClarification >

</ relatedPersonInfo >

- < relatedPersonInfo >

- < relatedPersonName >

< firstName > null </ firstName >

< lastName > InvestX Markets LLC </ lastName >

</ relatedPersonName >

- < relatedPersonAddress >

< street1 > 19 Fulton Street </ street1 >

< street2 > Suite 300 </ street2 >

< city > New York </ city >

< stateOrCountry > NY </ stateOrCountry >

< stateOrCountryDescription > NEW YORK </ stateOrCountryDescription >

< zipCode > 10038 </ zipCode >

</ relatedPersonAddress >

- < relatedPersonRelationshipList >

< relationship > Promoter </ relationship >

</ relatedPersonRelationshipList >

< relationshipClarification > Affiliate of Manager of the Issuer </ relationshipClarification >

</ relatedPersonInfo >

- < relatedPersonInfo >

- < relatedPersonName >

< firstName > null </ firstName >

< lastName > Great Lakes Fund Solutions, Inc. </ lastName >

</ relatedPersonName >

- < relatedPersonAddress >

< street1 > 500 Park Avenue </ street1 >

< street2 > Suite 114 </ street2 >

< city > Lake Villa </ city >

< stateOrCountry > IL </ stateOrCountry >

< stateOrCountryDescription > ILLINOIS </ stateOrCountryDescription >

< zipCode > 60046 </ zipCode >

</ relatedPersonAddress >

- < relatedPersonRelationshipList >

< relationship > Executive Officer </ relationship >

</ relatedPersonRelationshipList >

< relationshipClarification > Administrative Manager of the Issuer </ relationshipClarification >

</ relatedPersonInfo >

- < relatedPersonInfo >

- < relatedPersonName >

< firstName > Robert </ firstName >

< lastName > McLamore </ lastName >

</ relatedPersonName >

- < relatedPersonAddress >

< street1 > c/o Great Lakes Fund Soutions, Inc. </ street1 >

< street2 > 500 Park Avenue, Suite 114 </ street2 >

< city > Lake Villa </ city >

< stateOrCountry > IL </ stateOrCountry >

< stateOrCountryDescription > ILLINOIS </ stateOrCountryDescription >

< zipCode > 60046 </ zipCode >

</ relatedPersonAddress >

- < relatedPersonRelationshipList >

< relationship > Executive Officer </ relationship >

</ relatedPersonRelationshipList >

< relationshipClarification > Officer of the Administrative Manager of the Issuer </ relationshipClarification >

</ relatedPersonInfo >

</ relatedPersonsList >

- < offeringData >

- < industryGroup >

< industryGroupType > Pooled Investment Fund </ industryGroupType >

- < investmentFundInfo >

< investmentFundType > Other Investment Fund </ investmentFundType >

< is40Act > false </ is40Act >

</ investmentFundInfo >

</ industryGroup >

- < issuerSize >

< aggregateNetAssetValueRange > Decline to Disclose </ aggregateNetAssetValueRange >

</ issuerSize >

- < federalExemptionsExclusions >

< item > 06c </ item >

< item > 3C </ item >

< item > 3C.1 </ item >

</ federalExemptionsExclusions >

- < typeOfFiling >

- < newOrAmendment >

< isAmendment > false </ isAmendment >

</ newOrAmendment >

- < dateOfFirstSale >

< value > 2025-09-19 </ value >

</ dateOfFirstSale >

</ typeOfFiling >

- < durationOfOffering >

< moreThanOneYear > false </ moreThanOneYear >

</ durationOfOffering >

- < typesOfSecuritiesOffered >

< isPooledInvestmentFundType > true </ isPooledInvestmentFundType >

</ typesOfSecuritiesOffered >

- < businessCombinationTransaction >

< isBusinessCombinationTransaction > false </ isBusinessCombinationTransaction >

< clarificationOfResponse />

</ businessCombinationTransaction >

< minimumInvestmentAccepted > 50000 </ minimumInvestmentAccepted >

- < salesCompensationList >

- < recipient >

< recipientName > Christopher Russo </ recipientName >

< recipientCRDNumber > 2744913 </ recipientCRDNumber >

< associatedBDName > B Riley Wealth Management </ associatedBDName >

< associatedBDCRDNumber > 2543 </ associatedBDCRDNumber >

- < recipientAddress >

< street1 > 1400 Old Country Road </ street1 >

< street2 > Suite 302A </ street2 >

< city > Westbury </ city >

< stateOrCountry > NY </ stateOrCountry >

< stateOrCountryDescription > NEW YORK </ stateOrCountryDescription >

< zipCode > 11590 </ zipCode >

</ recipientAddress >

- < statesOfSolicitationList >

< state > NY </ state >

< description > NEW YORK </ description >

< state > TX </ state >

< description > TEXAS </ description >

</ statesOfSolicitationList >

< foreignSolicitation > false </ foreignSolicitation >

</ recipient >

- < recipient >

< recipientName > George Karapistolis </ recipientName >

< recipientCRDNumber > 4445637 </ recipientCRDNumber >

< associatedBDName > B Riley Wealth Management </ associatedBDName >

< associatedBDCRDNumber > 2543 </ associatedBDCRDNumber >

- < recipientAddress >

< street1 > 1400 Old Country Road </ street1 >

< street2 > Suite 302A </ street2 >

< city > Westbury </ city >

< stateOrCountry > NY </ stateOrCountry >

< stateOrCountryDescription > NEW YORK </ stateOrCountryDescription >

< zipCode > 11590 </ zipCode >

</ recipientAddress >

- < statesOfSolicitationList >

< state > NY </ state >

< description > NEW YORK </ description >

</ statesOfSolicitationList >

< foreignSolicitation > false </ foreignSolicitation >

</ recipient >

- < recipient >

< recipientName > Logan Cox </ recipientName >

< recipientCRDNumber > 6927720 </ recipientCRDNumber >

< associatedBDName > Cabin Securities, Inc. </ associatedBDName >

< associatedBDCRDNumber > 137608 </ associatedBDCRDNumber >

- < recipientAddress >

< street1 > 6240 W. 135th Street </ street1 >

< street2 > Suite 214 </ street2 >

< city > Overland Park </ city >

< stateOrCountry > KS </ stateOrCountry >

< stateOrCountryDescription > KANSAS </ stateOrCountryDescription >

< zipCode > 66223 </ zipCode >

</ recipientAddress >

- < statesOfSolicitationList >

< state > FL </ state >

< description > FLORIDA </ description >

< state > IL </ state >

< description > ILLINOIS </ description >

< state > TX </ state >

< description > TEXAS </ description >

</ statesOfSolicitationList >

< foreignSolicitation > false </ foreignSolicitation >

</ recipient >

- < recipient >

< recipientName > Marcus New </ recipientName >

< recipientCRDNumber > 72325082 </ recipientCRDNumber >

< associatedBDName > InvestX Markets LLC </ associatedBDName >

< associatedBDCRDNumber > 148248 </ associatedBDCRDNumber >

- < recipientAddress >

< street1 > 1055 West Hastings Street </ street1 >

< street2 > Suite 1420 </ street2 >

< city > Vancouver </ city >

< stateOrCountry > A1 </ stateOrCountry >

< stateOrCountryDescription > BRITISH COLUMBIA, CANADA </ stateOrCountryDescription >

< zipCode > V6E 2E9 </ zipCode >

</ recipientAddress >

- < statesOfSolicitationList >

< state > MI </ state >

< description > MICHIGAN </ description >

</ statesOfSolicitationList >

< foreignSolicitation > false </ foreignSolicitation >

</ recipient >

- < recipient >

< recipientName > Nicholas Harrison </ recipientName >

< recipientCRDNumber > 4509581 </ recipientCRDNumber >

< associatedBDName > B Riley Wealth Management </ associatedBDName >

< associatedBDCRDNumber > 2543 </ associatedBDCRDNumber >

- < recipientAddress >

< street1 > 1400 Old Country Road </ street1 >

< street2 > Suite 302A </ street2 >

< city > Westbury </ city >

< stateOrCountry > NY </ stateOrCountry >

< stateOrCountryDescription > NEW YORK </ stateOrCountryDescription >

< zipCode > 11590 </ zipCode >

</ recipientAddress >

- < statesOfSolicitationList >

< state > TX </ state >

< description > TEXAS </ description >

</ statesOfSolicitationList >

< foreignSolicitation > false </ foreignSolicitation >

</ recipient >

- < recipient >

< recipientName > Alto Securities, LLC </ recipientName >

< recipientCRDNumber > 318536 </ recipientCRDNumber >

< associatedBDName > None </ associatedBDName >

< associatedBDCRDNumber > None </ associatedBDCRDNumber >

- < recipientAddress >

< street1 > 500 11th Avenue N. </ street1 >

< street2 > Suite 790 </ street2 >

< city > Nashville </ city >

< stateOrCountry > TN </ stateOrCountry >

< stateOrCountryDescription > TENNESSEE </ stateOrCountryDescription >

< zipCode > 37203 </ zipCode >

</ recipientAddress >

- < statesOfSolicitationList >

< state > CA </ state >

< description > CALIFORNIA </ description >

< state > CO </ state >

< description > COLORADO </ description >

< state > CT </ state >

< description > CONNECTICUT </ description >

< state > NJ </ state >

< description > NEW JERSEY </ description >

< state > NM </ state >

< description > NEW MEXICO </ description >

< state > PA </ state >

< description > PENNSYLVANIA </ description >

< state > TX </ state >

< description > TEXAS </ description >

</ statesOfSolicitationList >

< foreignSolicitation > false </ foreignSolicitation >

</ recipient >

- < recipient >

< recipientName > Peter J. Sarner </ recipientName >

< recipientCRDNumber > 2561791 </ recipientCRDNumber >

< associatedBDName > B Riley Wealth Management </ associatedBDName >

< associatedBDCRDNumber > 2543 </ associatedBDCRDNumber >

- < recipientAddress >

< street1 > 40 South Main </ street1 >

< street2 > Suite 1600 </ street2 >

< city > Memphis </ city >

< stateOrCountry > TN </ stateOrCountry >

< stateOrCountryDescription > TENNESSEE </ stateOrCountryDescription >

< zipCode > 38103 </ zipCode >

</ recipientAddress >

- < statesOfSolicitationList >

< state > CT </ state >

< description > CONNECTICUT </ description >

< state > FL </ state >

< description > FLORIDA </ description >

< state > MN </ state >

< description > MINNESOTA </ description >

< state > NE </ state >

< description > NEBRASKA </ description >

< state > NV </ state >

< description > NEVADA </ description >

< state > TX </ state >

< description > TEXAS </ description >

</ statesOfSolicitationList >

< foreignSolicitation > false </ foreignSolicitation >

</ recipient >

</ salesCompensationList >

- < offeringSalesAmounts >

< totalOfferingAmount > Indefinite </ totalOfferingAmount >

< totalAmountSold > 4867278 </ totalAmountSold >

< totalRemaining > Indefinite </ totalRemaining >

< clarificationOfResponse />

</ offeringSalesAmounts >

- < investors >

< hasNonAccreditedInvestors > false </ hasNonAccreditedInvestors >

< totalNumberAlreadyInvested > 35 </ totalNumberAlreadyInvested >

</ investors >

- < salesCommissionsFindersFees >

- < salesCommissions >

< dollarAmount > 215527 </ dollarAmount >

</ salesCommissions >

- < findersFees >

< dollarAmount > 0 </ dollarAmount >

</ findersFees >

< clarificationOfResponse > The issuer may require investors brought by a registered broker-dealer to pay up to 4.5% of the investor's commitment to such broker-dealer. In addition, selling agents may receive a third of the carried interest. </ clarificationOfResponse >

</ salesCommissionsFindersFees >

- < useOfProceeds >

- < grossProceedsUsed >

< dollarAmount > 469132 </ dollarAmount >

</ grossProceedsUsed >

< clarificationOfResponse > Represents 4.5% upfront management fee and a 3.5% setup fee to the Manager, plus a 2.0% services fee paid to InvestX Markets LLC. </ clarificationOfResponse >

</ useOfProceeds >

- < signatureBlock >

< authorizedRepresentative > false </ authorizedRepresentative >

- < signature >

< issuerName > InvestX Series (ATR-U4), a Series of InvestX Master LLC </ issuerName >

< signatureName > /s/ Marcus A. New </ signatureName >

< nameOfSigner > Marcus A. New </ nameOfSigner >

< signatureTitle > Authorized Signatory </ signatureTitle >

< signatureDate > 2025-09-25 </ signatureDate >

</ signature >

</ signatureBlock >

</ offeringData >

</ edgarSubmission >