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( Mark One ) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number : 001-37552 WILLSCOT MOBILE MINI HOLDINGS CORP WILLSCOT - TM Delaware ( State or other jurisdiction of incorporation ) WILLSCOT MOBILE MINI HOLDINGS CORP . ( Exact name of registrant as specified in its charter ) mobile mini SOLUTIONS 4646 E Van Buren St. , Suite 400 Phoenix , Arizona 85008 ( Address of principal executive offices ) ( 480 ) 894-6311 ( Registrant's telephone number , including area code ) Trading Symbol ( s ) . WSC WSCWW WSCTW 82-3430194 ( I.R.S. Employer Identification No. ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of Each Class Common Stock , par value $ 0.0001 per share Warrants to purchase Common Stock ( 1 ) Warrants to purchase Common Stock ( 2 ) Securities registered pursuant to Section 12 ( g ) of the Act : None . No Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes > No 1 Name of Each Exchange on Which Registered The Nasdaq Capital Market OTC Markets Group Inc. OTC Markets Group Inc. Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulations S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes > No ( 1 ) Issued in connection with the initial public offering of Double Eagle Acquisition Corp. , the registrant's legal predecessor company , in September 2015 , which are exercisable for one - half of one share of the registrant's common stock for an exercise price of $ 5.75 . ( 2 ) Issued in connection with the registrant's acquisition of Modular Space Holding , Inc. in August 2018 , which are exercisable for one share of the registrant's common stock at an exercise price of $ 15.50 per share .