Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Checkbox not checked   Rule 13d-1(b)
Checkbox checked   Rule 13d-1(c)
Checkbox not checked   Rule 13d-1(d)




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SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G



 
Needham Investment Management L.L.C.
 
Signature:/s/ James W. Giangrasso
Name/Title:James W. Giangrasso, Chief Financial Officer
Date:05/15/2026
 
Needham Asset Management, LLC
 
Signature:/s/ James W. Giangrasso
Name/Title:James W. Giangrasso, Authorized Person
Date:05/15/2026
 
Needham Aggressive Growth Fund
 
Signature:/s/ James W. Giangrasso
Name/Title:James W. Giangrasso, Authorized Person
Date:05/15/2026
 
George A. Needham
 
Signature:/s/ George A. Needham
Name/Title:George A. Needham
Date:05/15/2026
Exhibit Information

Exhibit A - Joint Filing Agreement Exhibit B - Control Person Identification

Exhibit A

JOINT FILING AGREEMENT

The undersigned agree that this Schedule 13G Amendment No. 2 dated May 15, 2026 relating to the Common Stock, par value $0.02 per share, of Northern Technologies International Corp. shall be filed on behalf of the undersigned.

 

NEEDHAM INVESTMENT MANAGEMENT L.L.C.

 

By: /s/ James W. Giangrasso

  Name: James W. Giangrasso
  Title:   Chief Financial Officer

 

 

 

NEEDHAM ASSET MANAGEMENT, LLC

 

By: /s/ James W. Giangrasso

  Name: James W. Giangrasso
  Title:   Authorized Person

 

 

 

NEEDHAM AGGRESSIVE GROWTH FUND

 

By: /s/ James W. Giangrasso

  Name: James W. Giangrasso
  Title:   Authorized Person

 

 

 

GEORGE A. NEEDHAM

 

By: /s/ George A. Needham

 

 

Exhibit B

CONTROL PERSON IDENTIFICATION

 

Needham Investment Management L.L.C. is the relevant entity for which Needham Asset Management, LLC and George A. Needham may be considered control persons.