<SEC-DOCUMENT>0001562180-22-002337.txt : 20220303
<SEC-HEADER>0001562180-22-002337.hdr.sgml : 20220303
<ACCEPTANCE-DATETIME>20220303193144
ACCESSION NUMBER:		0001562180-22-002337
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20220301
FILED AS OF DATE:		20220303
DATE AS OF CHANGE:		20220303

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			OLSON CHRIS M
		CENTRAL INDEX KEY:			0001699190

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32462
		FILM NUMBER:		22711365

	MAIL ADDRESS:	
		STREET 1:		414 SILVER AVENUE SW
		STREET 2:		MS 1255
		CITY:			ALBUQUERQUE
		STATE:			NM
		ZIP:			87102-3289

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PNM RESOURCES INC
		CENTRAL INDEX KEY:			0001108426
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC SERVICES [4911]
		IRS NUMBER:				850019030
		STATE OF INCORPORATION:			NM
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		414 SILVER AVE. SW
		CITY:			ALBUQUERQUE
		STATE:			NM
		ZIP:			87102-3289
		BUSINESS PHONE:		5052412700

	MAIL ADDRESS:	
		STREET 1:		414 SILVER AVE. SW
		STREET 2:		ATTN: MS 0905 - CATHY MARTINEZ
		CITY:			ALBUQUERQUE
		STATE:			NM
		ZIP:			87102-3289

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MANZANO CORP
		DATE OF NAME CHANGE:	20000303
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primarydocument.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-03-01</periodOfReport>

    <notSubjectToSection16>false</notSubjectToSection16>

    <issuer>
        <issuerCik>0001108426</issuerCik>
        <issuerName>PNM RESOURCES INC</issuerName>
        <issuerTradingSymbol>PNM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001699190</rptOwnerCik>
            <rptOwnerName>OLSON CHRIS M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>CORPORATE HEADQUARTERS</rptOwnerStreet1>
            <rptOwnerStreet2>MS 1275</rptOwnerStreet2>
            <rptOwnerCity>ALBUQUERQUE</rptOwnerCity>
            <rptOwnerState>NM</rptOwnerState>
            <rptOwnerZipCode>87158-1275</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>SVP, UTILITY OPERATIONS</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2022-03-01</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5183.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>22625.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F2"/>
            </securityTitle>
            <transactionDate>
                <value>2022-03-01</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2441.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>44.64</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20184.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Rights</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2022-03-01</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1927.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1927.00</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5365.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The performance shares were earned as of December 31, 2021 for the 2019-2021 performance period, and settled on March 1, 2022.</footnote>
        <footnote id="F2">Represents shares withheld by PNM Resources, Inc. to satisfy the tax withholding obligations arising in connection with the settlement of equity awards. The company utilizes a modified &quot;share withholding&quot; approach in connection with settling equity awards, in which it (i) withholds (in cash) an amount to satisfy tax withholding obligations and remits such amount to the relevant tax authorities, and (ii) directs a designated broker to purchase on the open market the number of shares of the company's common stock that can be acquired with the after-tax value of equity awards at the prevailing market price. Only these &quot;net shares&quot; are delivered to the recipient of the equity awards.</footnote>
        <footnote id="F3">Each restricted stock right represents a contingent right to receive one share of PNM Resources, Inc. common stock.</footnote>
        <footnote id="F4">The restricted stock units vest in three equal annual installments. Vested shares will be delivered to the reporting person on the applicable vesting dates (or, if the company is in a blackout period under its insider trading policy on any vesting date, at a later date after such blackout period ends).</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Angela L. Pino, POA for Chris M. Olson</signatureName>
        <signatureDate>2022-03-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
