EX-4.1



 Exhibit 4.1 
  






 
 INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE SEE REVERSE SIDE FOR CERTAIN DEFINITIONS CUSIP 88025T 10 2
THIS CERTIFIES THAT is the owner of FULLY PAID AND NON-ASSESSABLE COMMON SHARES, $0.01 PAR VALUE, OF TENABLE HOLDINGS, INC. transferable on the books of the Corporation by the holder hereof in person or by Attorney upon surrender of this certificate
properly endorsed. This certificate is not valid until countersigned and registered by the Transfer Agent and Registrar. IN WITNESS WHEREOF, the said Corporation has caused this certificate to be signed by facsimile signatures of its duly authorized
officers. Dated: COUNTERSIGNED AND REGISTERED: AMERICAN STOCK TRANSFER & TRUST COMPANY (Brooklyn, New York) TRANSFER AGENT AND REGISTRAR BY AUTHORIZED SIGNATURE CHIEF FINANCIAL OFFICER PRESIDENT, CHIEF EXECUTIVE OFFICER AND CHAIRMAN 







 THE CORPORATION WILL FURNISH TO ANY STOCKHOLDER, UPON REQUEST AND WITHOUT CHARGE, A FULL STATEMENT OF THE
DESIGNATIONS, RELATIVE RIGHTS, PREFERENCES AND LIMITATIONS OF THE SHARES OF EACH CLASS AND SERIES AUTHORIZED TO BE ISSUED, SO FAR AS THE SAME HAVE BEEN DETERMINED, AND OF THE AUTHORITY, IF ANY, OF THE BOARD TO DIVIDE THE SHARES INTO CLASSES OR
SERIES AND TO DETERMINE AND CHANGE THE RELATIVE RIGHTS, PREFERENCES AND LIMITATIONS OF ANY CLASS OR SERIES. SUCH REQUEST MAY BE MADE TO THE SECRETARY OF THE CORPORATION OR TO THE TRANSFER AGENT NAMED ON THIS CERTIFICATE. 

 
  

The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according
to applicable laws or regulations: 
  

																	
	TEN COM	  	–	  	as tenants in common	  		  	UTMA	  	–	  	 	  	Custodian	  	 
		  		  		  		  		  		  	(Cust)	  		  	(Minor)
	TEN ENT	  	–	  	as tenants by entireties	  		  		  		  	under Uniform Transfers to Minors
		  		  		  		  		  		  	
	JT TEN	  	–	  	as joint tenants with right of survivorship and not as tenants in common	  		  		  		  	Act  	  	 
		  		  		  		  		  		  		  	(State)

 Additional abbreviations may also be used though not in the above list. 

 
 For value received _____ hereby sell, assign,
and transfer unto 
  

			
	PLEASE INSERT SOCIAL SECURITY OR OTHER	  	
	IDENTIFYING NUMBER OF ASSIGNEE	  	
	 	
	 	  	 

  
  

(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS INCLUDING POSTAL ZIP CODE OF ASSIGNEE) 

 
  
  

 
  

 

Shares of the capital stock represented by the within Certificate, and do hereby 
irrevocably constitute and appoint                                

  
  

Attorney to transfer the said stock on the books of the within-named Corporation with full power of substitution in the premises. 

 

					
			
	Dated                    	 		 	X
			
		 		 	X
			
		 		 	NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER.

  

	
	 SIGNATURE GUARANTEED
  

	  

ALL GUARANTEES MUST BE MADE BY A FINANCIAL INSTITUTION (SUCH AS A BANK OR BROKER) WHICH IS A PARTICIPANT IN THE SECURITIES TRANSFER AGENTS MEDALLION PROGRAM
(“STAMP”), THE NEW YORK STOCK EXCHANGE, INC. MEDALLION SIGNATURE PROGRAM (“MSP”), OR THE STOCK EXCHANGES MEDALLION PROGRAM (“SEMP”) AND MUST NOT BE DATED. GUARANTEES BY A NOTARY PUBLIC ARE NOT ACCEPTABLE.