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            <filer>
                <filerCredentials>
                    <cik>0001383318</cik>
                    <ccc>XXXXXXXX</ccc>
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            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



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            <issuerCik>0001660280</issuerCik>
            <issuerName>TENABLE HLDGS INC</issuerName>
            <secFileNumber>001-38600</secFileNumber>
            <issuerAddress>
                <ns2:street1>7021 COLUMBIA GATEWAY DRIVE, SUITE 500</ns2:street1>
                <ns2:city>COLUMBIA</ns2:city>
                <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                <ns2:zipCode>21046</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>4108720555</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>AMIT YORAN</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>40000</noOfUnitsSold>
            <aggregateMarketValue>1924000.00</aggregateMarketValue>
            <noOfUnitsOutstanding>118119887</noOfUnitsOutstanding>
            <approxSaleDate>03/04/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/04/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Exercise of Stock Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>40000</amountOfSecuritiesAcquired>
            <paymentDate>03/04/2024</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>AMIT YORAN</name>
                <address>
                    <ns2:street1>7021 COLUMBIA GATEWAY DRIVE, SUITE 500</ns2:street1>
                    <ns2:city>COLUMBIA</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>21046</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>02/27/2024</saleDate>
            <amountOfSecuritiesSold>5385</amountOfSecuritiesSold>
            <grossProceeds>255464.40</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>AMIT YORAN</name>
                <address>
                    <ns2:street1>7021 COLUMBIA GATEWAY DRIVE, SUITE 500</ns2:street1>
                    <ns2:city>COLUMBIA</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>21046</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>02/26/2024</saleDate>
            <amountOfSecuritiesSold>16091</amountOfSecuritiesSold>
            <grossProceeds>767862.52</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>AMIT YORAN</name>
                <address>
                    <ns2:street1>7021 COLUMBIA GATEWAY DRIVE, SUITE 500</ns2:street1>
                    <ns2:city>COLUMBIA</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>21046</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>02/23/2024</saleDate>
            <amountOfSecuritiesSold>5359</amountOfSecuritiesSold>
            <grossProceeds>252944.80</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>AMIT YORAN</name>
                <address>
                    <ns2:street1>7021 COLUMBIA GATEWAY DRIVE, SUITE 500</ns2:street1>
                    <ns2:city>COLUMBIA</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>21046</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>02/21/2024</saleDate>
            <amountOfSecuritiesSold>12329</amountOfSecuritiesSold>
            <grossProceeds>569846.38</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales Plan for AMIT YORAN</name>
                <address>
                    <ns2:street1>7021 COLUMBIA GATEWAY DRIVE, SUITE 500</ns2:street1>
                    <ns2:city>COLUMBIA</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>21046</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <saleDate>01/22/2024</saleDate>
            <amountOfSecuritiesSold>33201</amountOfSecuritiesSold>
            <grossProceeds>1590454.79</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales Plan for AMIT YORAN</name>
                <address>
                    <ns2:street1>7021 COLUMBIA GATEWAY DRIVE, SUITE 500</ns2:street1>
                    <ns2:city>COLUMBIA</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>21046</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <saleDate>01/19/2024</saleDate>
            <amountOfSecuritiesSold>3099</amountOfSecuritiesSold>
            <grossProceeds>147462.81</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales Plan for AMIT YORAN</name>
                <address>
                    <ns2:street1>7021 COLUMBIA GATEWAY DRIVE, SUITE 500</ns2:street1>
                    <ns2:city>COLUMBIA</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>21046</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <saleDate>01/18/2024</saleDate>
            <amountOfSecuritiesSold>800</amountOfSecuritiesSold>
            <grossProceeds>38200.20</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales Plan for AMIT YORAN</name>
                <address>
                    <ns2:street1>7021 COLUMBIA GATEWAY DRIVE, SUITE 500</ns2:street1>
                    <ns2:city>COLUMBIA</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>21046</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <saleDate>12/27/2023</saleDate>
            <amountOfSecuritiesSold>600</amountOfSecuritiesSold>
            <grossProceeds>28563.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales Plan for AMIT YORAN</name>
                <address>
                    <ns2:street1>7021 COLUMBIA GATEWAY DRIVE, SUITE 500</ns2:street1>
                    <ns2:city>COLUMBIA</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>21046</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <saleDate>12/26/2023</saleDate>
            <amountOfSecuritiesSold>2300</amountOfSecuritiesSold>
            <grossProceeds>109444.05</grossProceeds>
        </securitiesSoldInPast3Months>
        <remarks>The securities to be sold were and will be received upon the exercise of stock options over the next three months.
</remarks>
        <noticeSignature>
            <noticeDate>03/04/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>12/04/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ AMIT YORAN</signature>
        </noticeSignature>
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144
0001383318
XXXXXXXX
LIVE
0001660280
TENABLE HLDGS INC
001-38600
7021 COLUMBIA GATEWAY DRIVE, SUITE 500
COLUMBIA
MD
21046
4108720555
AMIT YORAN
Officer
COMMON
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
40000
1924000.00
118119887
03/04/2024
NASDAQ
Common
03/04/2024
Exercise of Stock Options
Issuer
N
40000
03/04/2024
Cash
N
AMIT YORAN
7021 COLUMBIA GATEWAY DRIVE, SUITE 500
COLUMBIA
MD
21046
Common
02/27/2024
5385
255464.40
AMIT YORAN
7021 COLUMBIA GATEWAY DRIVE, SUITE 500
COLUMBIA
MD
21046
Common
02/26/2024
16091
767862.52
AMIT YORAN
7021 COLUMBIA GATEWAY DRIVE, SUITE 500
COLUMBIA
MD
21046
Common
02/23/2024
5359
252944.80
AMIT YORAN
7021 COLUMBIA GATEWAY DRIVE, SUITE 500
COLUMBIA
MD
21046
Common
02/21/2024
12329
569846.38
10b5-1 Sales Plan for AMIT YORAN
7021 COLUMBIA GATEWAY DRIVE, SUITE 500
COLUMBIA
MD
21046
COMMON
01/22/2024
33201
1590454.79
10b5-1 Sales Plan for AMIT YORAN
7021 COLUMBIA GATEWAY DRIVE, SUITE 500
COLUMBIA
MD
21046
COMMON
01/19/2024
3099
147462.81
10b5-1 Sales Plan for AMIT YORAN
7021 COLUMBIA GATEWAY DRIVE, SUITE 500
COLUMBIA
MD
21046
COMMON
01/18/2024
800
38200.20
10b5-1 Sales Plan for AMIT YORAN
7021 COLUMBIA GATEWAY DRIVE, SUITE 500
COLUMBIA
MD
21046
COMMON
12/27/2023
600
28563.00
10b5-1 Sales Plan for AMIT YORAN
7021 COLUMBIA GATEWAY DRIVE, SUITE 500
COLUMBIA
MD
21046
COMMON
12/26/2023
2300
109444.05
The securities to be sold were and will be received upon the exercise of stock options over the next three months.
03/04/2024
12/04/2023
/s/ AMIT YORAN