Sec Form 4/A Filing - Noll Shaun @ DIRTT ENVIRONMENTAL SOLUTIONS LTD - 2021-02-25

FORM 4/A Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Noll Shaun 2. Issuer Name and Ticker or Trading Symbol DIRTT ENVIRONMENTAL SOLUTIONS LTD [ DRTT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 55 SPEAR STREET, 42ND FLOOR, 3. Date of Earliest Transaction (MM/DD/YY) 02/25/2021 (Street) SAN FRANCISCO, CA94105 4. If Amendment, Date Original Filed (MM/DD/YY) 03/01/2021 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Shares ( 1 ) 02/25/2021 P 212,620 A $ 2.4483 ( 2 ) 7,632,698 I ( 3 ) By 726 BF Common Shares ( 1 ) 02/25/2021 P 11,000 A $ 2.48 ( 4 ) 304,257 D Common Shares ( 1 ) 2,639,126 I ( 5 ) By 726 BC Common Shares ( 1 ) 16,390 I By Spouse

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) ( Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Noll Shaun 55 SPEAR STREET, 42ND FLOOR SAN FRANCISCO, CA94105 X Briger Peter L JR 1345 AVENUE OF THE AMERICAS 46TH FLOOR NEW YORK, NY10105 See Explanation of Responses 726 BF LLC 314 LYTTON AVENUE, SUITE 200 PALO ALTO, CA94301 See Explanation of Responses Briger Matthew 455 NORTH CITY FRONT PLAZA DRIVE SUITE 1730 CHICAGO, IL60611 See Explanation of Responses 726 BC LLC 455 NORTH CITY FRONT PLAZA DRIVE SUITE 1730 CHICAGO, IL60611 See Explanation of Responses Signatures /s/ Shaun Noll 03/23/2021 Signature of Reporting Person Date /s/ Shaun Noll, on behalf of Peter L. Briger Jr. 03/23/2021 Signature of Reporting Person Date 726 BF LLC; By: /s/ Shaun Noll, Chief Investment Officer and President 03/23/2021 Signature of Reporting Person Date /s/ Shaun Noll, on behalf of Matthew Briger 03/23/2021 Signature of Reporting Person Date 726 BC LLC; By: /s/ Shaun Noll, Chief Investment Officer and President 03/23/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This Form 4 is filed jointly by 726 BC LLC ("726 BC"), 726 BF LLC ("726 BF"), Peter L. Briger Jr., Matthew Briger and Shaun Noll (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group which collectively owns more than 10% of the Issuer's outstanding shares. Each of the Reporting Persons disclaims beneficial ownership of the shares reported owned herein except to the extent of his or its pecuniary interest therein. ( 2 )This transaction was executed in multiple trades at prices ranging from $2.35 to $2.48. The price above reflects the weighted average sale price. ( 3 )Shares owned directly by 726 BF. Peter L. Briger Jr., as the Manager of 726 BF, may be deemed to beneficially own the shares of the Issuer owned directly by 726 BF. Shaun Noll, Chief Investment Officer and President of 726 BF, has been delegated power to vote and dispose of the securities owned by 726 BF and, accordingly, Shaun Noll may be deemed to beneficially own the shares of the Issuer owned directly by 726 BF. ( 4 )This transaction was executed in multiple trades at prices ranging from $2.47 to $2.48. The price above reflects the weighted average sale price. ( 5 )Shares owned directly by 726 BC. Matthew Briger, as the Manager of 726 BC, may be deemed to beneficially own the shares of the Issuer owned directly by 726 BC. Shaun Noll, Chief Investment Officer and President of 726 BC, has been delegated power to vote and dispose of the securities owned by 726 BC and, accordingly, Shaun Noll may be deemed to beneficially own the shares of the Issuer owned directly by 726 BC.

Remarks: This Form 4/A corrects certain information that was provided in the Form 4 filed on March 1, 2021. There was no change in the ownership of DRTT stock held by the Reporting Persons.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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