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<?xml version="1.0" encoding="windows-1252"?> |
<ownershipDocument> |
| <schemaVersion> X0306 </schemaVersion> |
| <documentType> 4 </documentType> |
| <periodOfReport> 2021-02-23 </periodOfReport> |
| <notSubjectToSection16> 0 </notSubjectToSection16> |
| <issuer> |
| | <issuerCik> 0000788920 </issuerCik> |
| | <issuerName> PRO DEX INC </issuerName> |
| | <issuerTradingSymbol> PDEX </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001431777 </rptOwnerCik> |
| | | <rptOwnerName> Charlton Alisha </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> C/O 2361 MCGAW AVENUE </rptOwnerStreet1> |
| | | <rptOwnerStreet2></rptOwnerStreet2> |
| | | <rptOwnerCity> IRVINE </rptOwnerCity> |
| | | <rptOwnerState> CA </rptOwnerState> |
| | | <rptOwnerZipCode> 92614 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> 0 </isDirector> |
| | | <isOfficer> 1 </isOfficer> |
| | | <isTenPercentOwner> 0 </isTenPercentOwner> |
| | | <isOther> 0 </isOther> |
| | | <officerTitle> Chief Financial Officer </officerTitle> |
| | | <otherText></otherText> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <derivativeTable> |
| | <derivativeTransaction> |
| | | <securityTitle> |
| <value> Stock Option (Right-to-buy) </value> |
| <footnoteId id="F1"/> |
| </securityTitle> |
| | | <conversionOrExercisePrice> |
| <value> 27.50 </value> |
| </conversionOrExercisePrice> |
| | | <transactionDate> |
| <value> 2021-02-23 </value> |
| </transactionDate> |
| | | <deemedExecutionDate></deemedExecutionDate> |
| | | <transactionCoding> |
| <transactionFormType> 4 </transactionFormType> |
| <transactionCode> A </transactionCode> |
| <equitySwapInvolved> 0 </equitySwapInvolved> |
| </transactionCoding> |
| | | <transactionTimeliness></transactionTimeliness> |
| | | <transactionAmounts> |
| <transactionShares> |
| <value> 4250 </value> |
| </transactionShares> |
| <transactionPricePerShare> |
| <value> 0 </value> |
| </transactionPricePerShare> |
| <transactionAcquiredDisposedCode> |
| <value> A </value> |
| </transactionAcquiredDisposedCode> |
| </transactionAmounts> |
| | | <exerciseDate> |
| <value> 2021-07-01 </value> |
| </exerciseDate> |
| | | <expirationDate> |
| <value> 2031-07-01 </value> |
| </expirationDate> |
| | | <underlyingSecurity> |
| <underlyingSecurityTitle> |
| <value> Common Stock </value> |
| </underlyingSecurityTitle> |
| <underlyingSecurityShares> |
| <value> 4250 </value> |
| </underlyingSecurityShares> |
| </underlyingSecurity> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 25500 </value> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </derivativeTransaction> |
| | </derivativeTable> |
| <footnotes> |
| | <footnote id="F1"> These options were awarded under Pro-Dex's 2016 Equity Incentive Plan. The percentage of options that may vest and become exercisable, if any, are 100%, 50%, and 25%, respectively, based upon the volume-weighted average price of Pro-Dex's common stock equaling or exceeding the applicable exercise price for the 60 trading days immediately preceding the date the option becomes exercisable, six months from the date the option becomes exercisable, or twelve months from the date the option becomes exercisable, respectively. </footnote> |
| | </footnotes> |
| <ownerSignature> |
| | <signatureName> /s/ Alisha Charlton </signatureName> |
| | <signatureDate> 2021-02-25 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |